VEHICLE DRIVING ASSISTANT

专利摘要:
vehicle driving assistant and vehicle driving assistance method is an overtaking state, which is either a state in which your own vehicle (mm) is overcoming an obstacle (sm) that is in the posterolateral direction of your own vehicle ( mm), or a state in which your own vehicle (mm) is expected to exceed the obstacle, is detected. when driving a control to prevent approaching an obstacle, which prevents your own vehicle (mm) from approaching an obstacle (sm) that exists in the posterolateral direction of your own vehicle (mm), and when it is evaluated as a state Based on the detection mentioned above, the control to prevent approaching an obstacle with respect to the aforementioned obstacle (sm) is suppressed compared when it is not assessed as an overtaking state.
公开号:BR112012001005B1
申请号:R112012001005-0
申请日:2010-07-15
公开日:2019-10-01
发明作者:Masahiro Kobayashi；Yasuhisa Hayakawa；Kou Sato
申请人:Nissan Motor Co., Ltd.；
IPC主号:

专利说明:

“VEHICLE DRIVING ASSISTANT”
Technical Field
The present invention relates to a vehicle driving assistant and a vehicle driving assistance method to assist a driver's driving operation so that the driver's own vehicle can be prevented from accessing an obstacle positioned on a posterolateral direction of the vehicle itself.
Background of the Technique
As a conventional vehicle driving assistant, for example, there is a technology described in Patent Literature 1. According to this technology, the obstacle in the posterolateral direction of the driver's own vehicle is detected, and when the obstacle is detected, it is determined that control of driving assistance with respect to the obstacle is necessary, thus suppressing the steering operation by the driver. It is revealed that the above operations prevent the vehicle from accessing the obstacle itself.
Citation List
Patent Literature
Patent Literature 1: Unexamined Japanese Patent Publication No. Heisei 8 (1996) -253160
Summary of the Invention
Technical problem
However, according to the technology described in Patent Literature 1, even when the driver makes the steering operation to the side of the obstacle while recognizing the obstacle, if the obstacle is present in the posterolateral direction of the vehicle itself, the vehicle itself vehicle is thereby controlled to prevent access to the obstacle. Thus, such control can make the driver uncomfortable.
The present invention was made in view of the points above. It is an objective of the present invention to provide a vehicle driving assistant that reduces the discomfort given to the driver and is able to correctly implement the driving assistance control with respect to the obstacle positioned in the posterolateral direction of the vehicle itself.
Solution to the Problem
To solve the above problem, according to the first aspect of the present invention, a vehicle driving assistant is provided including: a side obstacle detector to detect an obstacle present in an obstacle detection area, with at least one poster direction -side of a vehicle itself as the obstacle detection area; obstacle access prevention controller to implement an obstacle access prevention control that helps prevent access to prevent the vehicle from accessing the obstacle detected by the side obstacle detector; an overrun status detector to detect an override state that is
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2/55 at least one of a first state where the vehicle itself is overcoming the obstacle detected by the side obstacle detector and a second state where the vehicle itself is estimated to overcome the obstacle; and a control suppressor, when a determination is made that the overtaking state is established, based on detection by the overtaking status detector, to suppress the obstacle access prevention control compared to when the determination is not made that overtaking status is established.
In addition, in accordance with the second aspect of the present invention, a method of assisting vehicle driving is provided including: a side obstacle detection operation to detect an obstacle present in an obstacle detection area, with at least one direction posterolateral of a vehicle itself as the obstacle detection area; an obstacle access prevention control operation to implement an obstacle access prevention control that helps prevent access to prevent the vehicle itself from accessing the obstacle detected by the side obstacle detector; an overrun detection operation to detect an overrun state that is at least one of a first state where the vehicle itself is overcoming the obstacle detected by the lateral obstacle detection operation and a second state where the vehicle itself is estimated to overcome the obstacle; and a control override operation, when a determination is made that the override state is established, based on the detection of the override detection operation, to suppress the obstacle access prevention control compared to when it is not done the determination that the overtaking state is established.
Advantageous Effects of the Invention
When the driver's own vehicle accesses the obstacle in order to meet the start condition of preventing access control to the obstacle in a situation where it can be determined that the driver's own vehicle is in a state of overcoming the obstacle or in an estimated state to overcome the obstacle, it is assumed that the driver has an intention to change the route to the side obstacle while recognizing the presence of the obstacle. Under the present invention, in such a case, the control to prevent access to the obstacle is suppressed, as a result, making it possible to suppress driver discomfort. That is, while lessening the discomfort given to the driver, the present invention can correctly implement driving assistance control with respect to the obstacle positioned in the posterolateral direction of the vehicle itself.
Brief Description of the Drawings [Fig. 1] Fig. 1 is a schematic structural view of a driving assistant.
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3/55 vehicle according to the first embodiment of the present invention.
[Fig. 2] Fig. 2 is a conceptual diagram to explain an obstacle detection area and others in a posterolateral direction of the vehicle itself.
[Fig. 3] Fig. 3 is a diagram to explain the structure of a control unit.
[Fig. 4] Fig. 4 is a flow chart showing the processing procedure for the control unit according to the first embodiment of the present invention.
[Fig. 5] Fig. 5 is a block diagram showing a concept of calculating an amount of overtaking precision on the left.
[Fig. 6] Fig. 6 is a block diagram showing a concept of calculating an amount of precision for detecting change of route on the left in a direction of an obstacle on the left.
[Fig. 7] Fig. 7 is a conceptual diagram showing a relationship between the vehicle itself and the obstacle.
[Fig. 8] Fig. 8 is a diagram to explain the operation according to the first embodiment of the present invention.
[Fig. 9] Fig. 9 is a flowchart showing the processing procedure of the control unit according to the second embodiment of the present invention.
[Fig. 10] Fig. 10 is a flow chart showing the processing procedure of the control unit according to the third and fourth embodiments of the present invention.
[Fig. 11] Fig. 11 is a conceptual diagram to explain the fourth embodiment of the present invention.
[Fig. 12] Fig. 12 is a flow chart showing the processing procedure for the control unit according to the fifth embodiment of the present invention.
[Fig. 13] Fig. 13 is a flow chart showing the processing procedure for calculating a gain on the left.
[Fig. 14] Fig. 14 is a diagram showing a melting point of the vehicle's own travel route.
[Fig. 15] Fig. 15 is a diagram to explain the operation according to the fifth embodiment of the present invention.
Description of Modalities
Hereinafter, the modalities of the present invention will be exposed referring to the drawings.
First Mode
According to the first modality, an explanation is made about a case where a vehicle driving assistant is installed in a rear wheel drive vehicle. Here, as a target vehicle, a front-wheel drive vehicle or a four-wheel drive vehicle can also be used. In addition, an electric vehicle (VE) or
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4/55 a hybrid vehicle can also be used.
Structure
Fig. 1 is a schematic structural view of the vehicle driving assistant according to the first embodiment.
In Fig. 1, reference numeral 1 denotes a brake pedal. The brake pedal 1 is connected to a master cylinder 3 by means of a reinforcer 2. In addition, reference numeral 4 in Fig. 1 denotes a reservoir.
The master cylinder 3 is connected to the wheel cylinders 6FL, 6FR, 6RL, 6RR of the respective wheels 5FL, 5FR, 5RL, 5RR by means of a fluid pressure circuit 30. Thus, in a state where a brake control is inoperative , the master cylinder 3 increases the brake oil pressure according to the amount of depression of the brake pedal conductor 1. The brake oil pressure thereby increased is provided through the fluid pressure circuit 30 for each of the wheel cylinders 6FL, 6FR, 6RL, 6RR of the respective wheels 5FL, 5FR, 5RL, 5RR.
The brake oil pressure controller 7 controls an actuator 30A in the fluid pressure circuit 30, thereby individually controlling the brake oil pressure for each of the 5FL, 5FR, 5RL, 5RR wheels. Then, to a value according to a command value of a brake drive force control unit 8, the brake oil pressure controller 7 controls the brake oil pressure for each of the 5FL, 5FR wheels, 5RL, 5RR. Like the actuator 30A, proportional solenoid valves are provided which are arranged corresponding to the respective 6FL, 6FR, 6RL, 6RR wheel cylinders and which can individually control the fluid pressures of the respective 6FL, 6FR, 6RL, 6RR wheel cylinders each in one arbitrary brake oil pressure.
Here, the brake oil pressure controller 7 and fluid pressure circuit 30 can use a brake oil pressure controller that is used, for example, for a non-slip control (ABS), a traction control (TCS) or a vehicle dynamics control unit (VDC). The brake oil pressure controller 7 can otherwise be configured so that the brake oil pressure controller 7 can alone, that is, instead of using the fluid pressure circuit 30, control the oil pressure of the brake fluid. brake of each of the 6FL wheel cylinders. 6FR, 6RL, 6RR. Then, when a brake oil pressure command value is entered in the brake oil pressure controller 7 of a brake actuation force control unit 8 described later, the brake oil pressure controller 7 controls each brake oil pressure according to the brake oil pressure command value.
In addition, this vehicle has a drive torque control unit
12.
The drive torque control unit 12 controls a drive torque
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5/55 for the rear wheels 5RI, 5RR each as a drive wheel. This control can be carried out by controlling an operational state of a motor 9, a selective gear ratio of an automatic transmission 10 and a pressure regulator opening of a pressure regulating valve 11. That is, the drive torque control unit 12 controls the amount of fuel injection or ignition regulation. In addition, the drive torque control unit 12 simultaneously controls the opening of the pressure regulator. For these operations, the drive torque control unit 12 controls the operating status of motor 9.
In addition, the drive torque control unit 12 transmits the value of a drive torque Tw (as control information) to the brake drive force control unit 8.
Otherwise, the drive torque control unit 12 can alone, that is, instead of using the brake drive force control unit 8, control the driving torque Tw of the rear wheels 5RL, 5RR. However, when the command value of the actuation touch is entered from the brake actuation force control unit 8, the actuation torque control unit 12 controls the actuation torque Tw according to the command value of the actuation torque. activation in this way introduced.
In addition, the front portion of the vehicle has an image capture portion 13 that has an image processing function. The image capture portion 13 is used to detect a position of the MM driver's own vehicle (refer to Fig. 2) on a travel route. The image capture portion 13 has a monocular camera that is made, for example, from a CCD (Load Coupled Device) camera.
The image capture portion 13 takes an image of the forward direction of the MM vehicle itself. Then, the image capture portion 13 implements image processing of the image thus taken in the forward direction of the MM vehicle itself, detects a route marking such as a white line 200 (route marker) and others (refer to to Fig. 7), and then detects the travel route based on the white line 200 thus detected.
In addition, based on the travel route thus detected, the image capture portion 13 calculates an angle (yaw angle) φ formed by the travel path of the MM vehicle itself and a forward and backward directional axis of the vehicle MM itself, a lateral displacement Xf with respect to the travel route, curvature β of the travel route, and others. The image capture portion 13 transmits the yaw angle thus calculated 4f, lateral displacement Xf, curvature β of travel route, and others to the brake drive force control unit 8.
Here, the image capture portion 13 detects the white line 200 as the
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6/55 trip, and then, based on the line thus detected 200, calculates the yaw angle φ. Therefore, the accuracy of detecting the yaw angle φ is greatly influenced by the accuracy of the image capture portion 13 of detecting the white line 200.
Otherwise, the curvature β can be calculated from the travel route based on a steering angle δ of a steering wheel 21 described later.
In addition, the vehicle has 24L / 24R radar devices. The 24L / 24R radar devices are sensors to detect an SM obstacle (refer to Fig. 2) present in the posterolateral direction on the respective left and right sides. The 24L / 24R radar devices are, as shown in Fig. 2, capable of detecting the SM obstacle in the direction towards the side of the MM vehicle itself. Then, from the detectable range, the 24L / 24R radar devices determine, as a detectable area of K-AREA obstacle, at least one area that is positioned in the posterolateral direction of the vehicle itself and is blind spot (of the driver). When the SM obstacle is present in the KAREA obstacle detection area, the 24L / 24R radar devices determine that the SM obstacle is present. In addition, on each of the respective left and right sides, the 24L / 24R radar devices can detect, a POSXobst relative side position, a DISTobst relative longitudinal position, and a dDistobst relative longitudinal speed that is defined with respect to the SM obstacle. Here, according to the first modality, an extended direction of the MM vehicle's own travel route is defined as a longitudinal direction and a transverse direction of the MM vehicle's own travel route is defined as a lateral direction.
In addition, the 24L / 24R radar devices, each, are made, for example, of a millimeter wave radar.
In addition, this vehicle has a radar device 23. The radar device 23 is a sensor for detecting the SM obstacle present in the forward direction of the MM vehicle itself. The radar device 23 can detect a Dist_pre distance between the MM vehicle itself and the obstacle ahead SM and a Relvsp_pre relative speed between the MM vehicle itself and the obstacle ahead SM.
In addition, this vehicle has a master cylinder pressure sensor 17, an accelerator opening sensor 18, a steering angle sensor 19, a steering indicator switch 20, and wheel speed sensors 22FL, 22FR, 22LR , 22RR.
The pressure sensor of the master cylinder 17 detects the outlet pressure of the master cylinder 3, that is, a fluid pressure of the master cylinder Pm. The accelerator opening sensor 18 detects the amount of depression in the accelerator pedal, that is, an opening in the accelerator 0t (or amount of depression in the accelerator 0t). The steering angle sensor 19 detects a steering angle δ of the steering wheel 21. The direction indicator switch 20 detects a direction indication operation by a direction indicator. The senPetition 870190076710, of 08/08/2019, p. 16/86
7/55 wheel speed sores 22FL, 22FR, 22LR, 22RR detect the rotational speeds of the respective wheels 5FL, 5FR, 5RL, 5RR whose speeds are each what is called a wheel speed Vwi (i = fl, fr, rl , rr). These sensors and others then transmit the signals thus detected to the brake drive force control unit 8.
A navigation system 40 is installed on this vehicle. Along with highway information such as map information and others including road curvature, the navigation system 40 transmits to the brake drive force control unit 8 the route information which is adjusted based on the destination input of the conductor.
Fig. 3 is a block diagram schematically showing the processes of the brake actuation force control unit 8. The processes of the brake actuation force control unit 8 are implemented based on a flowchart later described shown in Fig. 4, however, Fig. 3 denotes the processing schematically as a block.
As shown in Fig. 3, the brake actuation force control unit 8 has a future position estimator 8A, an obstacle prevention controller 8B, an override status detector 8C and a change intention detector 8D. In addition, the obstacle access prevention controller 8B has a control suppressor 8Ba.
Based on the driver's direction input detected by a direction input detector, the future position estimator 8A estimates a future position of the vehicle itself (the future position of the vehicle itself in the transverse direction of the travel route, or an estimated position of the vehicle itself subsequently described AXb) after a lapse of time forwards surveillance Tt.
A side obstacle detector 50 is equivalent to 24L / 24R radar devices and detects pieces of information from the SM obstacle with reference to the MM vehicle itself, information including the presence or absence of the SM obstacle from the K-AREA obstacle detection area in the postero-lateral direction of the MM vehicle itself, in the POSXobst relative lateral position of the SM obstacle, in the relative longitudinal position DISTobst, the relative longitudinal speed of dDistobst and others.
The obstacle access prevention controller 8B implements an obstacle access prevention control to assist in preventing the MM vehicle itself from accessing the SM obstacle detected by the side obstacle detector 50. Specifically, in a case where it is determined that the detector side obstacle 50 detects the SM obstacle in the posterior-lateral direction of the MM vehicle itself, the obstacle access control controller 8B detects the start of the obstacle access prevention control when the lateral position of a future position of the vehicle itself 150 achieve a position of
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8/55 start of control 60 (a certain lateral portion in the transverse direction of the route, refer to a Fig. 7 described later) and then implement the control to prevent access to the obstacle.
Based on the information detected by the side obstacle detector 50, that is, the information of the obstacle SM with reference to the MM vehicle itself, the overtaking state detector 8C detects an overtaking state that is defined with at least one of the first state where the MM vehicle itself is overcoming the SM obstacle and a second state where it is estimated that the MM vehicle itself will overcoming the SM obstacle, and then the overrun status detector 8C transmits the information thus detected to the control suppressor 8Ba.
The 8D change intent detector calculates a driver's change intent accuracy. When the accuracy of the route change intent thus calculated is high, the change intention detector 8D determines that the driver has an intention to change the route, thereby transmitting such information to the control suppressor 8Ba.
When a determination is made that the override state is established, based on detection by the override state detector 8C, the control suppressor 8Ba suppresses the obstacle access prevention control compared to when the determination is not made that the override status overtaking is established.
Fig. 4 is a flowchart showing a preventive processing procedure control implemented by the brake actuation force control unit 8.
The control of the prevention processing procedure is implemented by stopping the timer for a certain sampling time ΔΤ (for example, every 10 ms). Here, the processing of the prevention control shown in Fig. 4 does not have a communication processing, however, renewal of the information acquired by a calculation processing is memorized in a memory when necessary and the necessary information will be read from the memory when necessary.
Step S10
In principle, in step S10, the brake actuation force control unit 8 reads various data from each of the above sensors, controllers and control units. Specifically, the brake drive force control unit 8 acquires each wheel speed Vwi (i = fl, fr, rl, rr), the steering angle δ, the throttle opening 0t, the fluid pressure of the master cylinder Pm, which are detected from each of the sensors including the wheel speed sensors 22FL, 22FR, 22LR, 22RR, the steering angle sensor 19, the throttle opening sensor 18, and the master cylinder pressure sensor 17 In addition, the brake actuation force control unit 8 acquires i) the direction change signal from the direction indicator switch 20, ii) the steering angle
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9/55 yaw φί, the lateral displacement Xf, the curvature of the travel path β that are detected by the image capture portion 13, and iii) the SM information of the lateral obstacle detected by the 24L / 24R radar devices side obstacle 50).
Step S20
Then, in step S20, the brake drive force control unit 8 calculates a vehicle speed V. That is, based on the wheel speed Vwi (i = fl, fr, rl, rr) detected by the speed sensors of the 22FL, 22FR, 22LR, 22RR wheels, the brake actuation force control unit 8 calculates vehicle speed V as shown in the following expression (1).
V = (Vwrl + Vwrr) / 2 (for front wheel drive),
V = (Vwfl + Vwfr) / 2 (for rear wheel drive) ............ (1)
Here, Vwfl and Vwfr denote wheel speeds of the left and right front wheels, respectively. Vwrl and Vwrr denote wheel speeds of the left and right rear wheels, respectively. That is, in expression (1), the vehicle's speed V is calculated as an average of the wheel speeds of the follower's wheels (pulled). According to the first modality, the vehicle has rear wheel drive, so the last expression, that is, the wheel speeds Vwfl and Vwfr of the respective left and right front wheels 5FL and 5FR are used to calculate the vehicle speed V.
In addition, when another automatic brake controller such as ABS (Anti-lock Brake System) control is in operation, an estimated vehicle speed estimated by such automatic brake controller is acquired, and used as the vehicle speed V above.
Step S30
In step S30, based on the signals from the 24L / 24R radar devices on the respective left and right sides, the brake actuation force control unit 8 determines the Lobst-Robst presence of the SM obstacle (present or absent) with respect to K-AREA obstacle detection area started in the left and right posterolateral directions of the MM vehicle itself. In addition, the brake actuation force control unit 8 acquires the posterolateral SM obstacle position and relative speed for the MM vehicle itself. Here, the postero-lateral direction of the MM vehicle itself indicates the lateral and rear positions of the MM vehicle itself. That is, the postero-lateral direction of the MM vehicle itself includes a diagonally rear position of the MM vehicle itself.
Step S40
Then, in step S40, of the image capture portion 13, the brake actuation force control unit 8 reads on the lateral displacement Xf of the MM vehicle itself and the curvature of the travel route with respect to the travel road where the vehicle itself MM vehicle is currently traveling.
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However, acquisition of the β curvature of the travel route is not limited to calculation based on the image taken by the image capture portion 13. Otherwise, for example, the curvature information of the travel route at the position of the vehicle itself can be acquired based on the map information stored in the navigation system 40.
Then, the yaw angle φί of the MM vehicle itself in relation to the travel road on which the driver is currently driving is calculated. The yaw angle φί is used to detect the travel status on the route.
According to the first modality, the yaw angle φί can be detected, for example, by the following operations: an image in the forward direction of the vehicle whose image was taken by the image capture portion 13 is converted into a suspended image, and the angle of the white line 200 (route marker) with respect to the upward and downward direction of the thereby converted image is obtained.
Otherwise, the yaw angle φί can be calculated based on the white line 200 adjacent to the MM vehicle itself in the image taken by the image capture portion
13. In this case, for example, an amount of change in the lateral displacement Xf of the MM vehicle itself is used to calculate the yaw angle φί using the following expression (2). Here, the lateral displacement Xf is a position in the transverse direction on the travel route of the MM vehicle itself with reference to the white line 200 (route marker) and is equivalent to a distance from the white line 200 to the MM vehicle itself.
φί = (dX '/ V (= dX / dY)) ........... (2)
Here, dX denotes an amount of change in lateral displacement Xf per unit time, dY denotes an amount of change in the direction of travel per unit time, and dX 'denotes a differential value of the amount of change dX.
Here, when the yaw angle φί is calculated based on the adjacent white line 200, as shown by expression (2) above, the calculation of the ânguloί angle is not limited to using the lateral offset Xf. Otherwise, for example, the detected white line 200 adjacent to the MM vehicle itself is extended away, and then the yaw angle φί can be calculated based on the white line 200 thereby extended. The calculation method (based on the image in front of the vehicle) of the lateral displacement Xf of the MM vehicle itself, the curvature β of the travel route, the yaw angle φί and others is a known technique that is already adopted for several devices ( such as route tracking controller and others) to control the MM vehicle itself by recognizing the white line 200. In this way, detailed explanation of such a known calculation method is omitted.
Step S50
In step S50, the overtaking status of the MM vehicle in relation to the SM obstacle is detected.
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Overtaking status detection is implemented based on the information of the relative distance Dist, Relvsp relative speed and Angle detection angle which are each SM obstacle information (detected with reference to the MM vehicle itself) detected by the 24L / 24R radar devices ( side obstacle detector 50). Relation between the Dist relative distance, the Relvsp relative speed and the Angle detection angle is shown in Fig. 2.
The relative distance Dist is the obstacle distance SM with respect to the MM vehicle itself and is equivalent to the relative longitudinal position DISTobst. Relvsp relative speed is the MM speed of the vehicle itself in relation to the SM obstacle and can be calculated, for example, by differentiating the relative longitudinal position DISTobst. Relvsp relative speed is determined positive when the MM vehicle itself is in a direction away from the SM side obstacle (when the speed of the V vehicle itself in the direction of travel of the MM vehicle itself is greater than the speed of the SM obstacle). The Angle detection angle is the SM obstacle detection angle in relation to the MM vehicle itself and can be acquired from the POSXobst relative side position and DISTobst relative longitudinal position. The Angle detection angle is set to 0 degrees when the SM obstacle is in a position immediately lateral to the MM vehicle itself. Then, with reference to the position immediately lateral to the MM vehicle itself, the Angle detection angle becomes larger as the obstacle position SM with respect to the MM vehicle itself is positioned towards the rear of the MM vehicle itself. The Angle detection angle is adjusted to 90 degrees when the SM obstacle is in a position immediately after the MM vehicle itself. Here, the immediately lateral position can be adjusted, for example, as an immediately lateral position to adjust the 24L / 24R devices or an immediately lateral position of the vehicle's center of gravity.
Then, when the following conditions (a) to (c) are met, it is detected that the possibility that the overtaking state is established is high, based on the SM obstacle information on the left with reference to the MM vehicle itself. Otherwise, detection that the possibility that the overtaking state is established is high can be made when any of the following conditions (a) to (c) is satisfied. However, in order to detect more precisely that the possibility that the overtaking state is established is high, satisfying all conditions (a) to (c) is preferable.
(a) Relative distance Dist> Determination threshold KD1 of Relative distance Dist (b) Relative speed Relvsp> Determination threshold KR1 of Relvsp relative speed (c) Angle detection angle> Angle detection angle KA1
Here, the threshold of determination KD1 of the relative distance Dist is adjusted, for example
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12/55 plo, for 3 m. The threshold for determining KR1 of the Relvsp relative speed is adjusted, for example, to 2 m / s to 3 m / s. The determination threshold KA1 of the Angle detection angle is adjusted, for example, to 40 degrees to 45 degrees. Here, the overtaking state is defined as a first state where the MM vehicle itself can change the route to the SM obstacle side after the MM vehicle itself has overcome the SM obstacle or a second state that such a route change possibility is estimated . In this way, the determination thresholds KD1, KR1 and KA1 are adjusted through empirical values or experiments based on the first or second states above.
Step S55
Then, when the detection that the possibility that the overtaking state is established is high, continue for a certain time to determine the overtaking (or when interrupt processing is implemented continuously at a certain frequency), determining whether or not the overtaking state is established is done in step S55. The determination of the continuation above can be made based on the values of a counter used to count the processing. However, on the contrary, even when the detection that the possibility that the overtaking state is established is high does not continue for a certain time to determine the overtaking, provided that the conditions (a) to (c) above are satisfied, the determination is whether or not the overtaking state is established can be done in step S55. According to the first modality, to make the determination with precision that the possibility that the overtaking state is high is established, the determination whether or not the overtaking state continues for a certain time to determine the overtaking is done, as stated above .
In addition, in step S55, based on the SM obstacle information on the left with reference to the MM vehicle itself, an amount of overtaking precision on the left aL1 is calculated, as shown in Fig. 5.
That is, based on the following expression, the amount of overtaking precision to the left aL1 is calculated. Here, when it is determined in step S50 that conditions (a) to (c) are not met, the amount of overtaking precision to the left aL1 is set to 1 in this step S55.
aL1 = KD (Dist) x KR (Relvsp) x KA (Angle)
Here, KD (Dist) is a value calculated with the relative distance Dist as a variable and based on a map shown on a calculator of the first amount of overtaking accuracy 501a in Fig. 5. The KD (Dist) becomes a certain value when the relative distance Dist is less than or equal to the threshold of determination KD1 of the distance relative Dist, while the KD (Dist) is smaller when the relative distance Dist is greater than the threshold of determination KD1 of the distance relative Dist. Instead of the map, KD (Dist) can be calculated as follows: the map shown in Fig. 5 is saved in advance as a
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13/55 function, and then the function memorized in that way is used.
The KR (Relvsp) is calculated with the Relvsp relative speed as a variable and based on the map shown in a calculator of the second amount of overtaking accuracy 501b in Fig. 5. The KR (Relvsp) becomes a certain value when the relative speed Relvsp is less than or equal to the KR1 determination threshold of the Relvsp relative speed, while the KR (Relvsp) is lower when the Relvsp relative speed is greater than the KR1 determination threshold. In place of the map, the KR (Relvsp) can be calculated as follows: the map shown in Fig. 5 is saved in advance as a function, and then the function saved in this way is used.
The KA (Angle) is calculated with the Angle detection angle as variable and based on the map shown in a calculator of the third amount of overtaking accuracy 501c in Fig. 5. The KA (Angle) becomes a certain value when the angle Detection Angle is less than or equal to the determination threshold KA1 of the Angle detection angle, while the KA (Angle) becomes lower when the detection angle Angle is greater than the determination threshold KA1. In place of the map, the KA (Angle) can be calculated as follows: the map shown in Fig. 5 is stored in advance as a function, and then the function in that way is used.
Then, when the amount of overtaking accuracy on the left aL1 becomes less than or equal to a certain overtaking detection threshold, it is detected that the overtaking state is established. The overrun detection threshold is set to less than 1. This override detection threshold varies, depending on how far the override detection accuracy is adjusted. However, the threshold for detection of overshoot can be adjusted from experiments or empirical values.
Here, Fig. 5 is a block diagram showing the concept of calculating the amount of overtaking precision on the left aL1. Referring to the block diagram, an explanation is made about processing examples to calculate the amount of overtaking precision to the left aL1.
Based on the relative distance Dist, the first override accuracy calculator 501a calculates the first override accuracy KD (Dist) by referring to the calculation map for the first override accuracy amount.
Here, the calculation map for the first amount of overtaking accuracy has an ordinate representing the first amount of overtaking accuracy KD and an abscissa representing the relative distance Dist. Then, the calculation map of the first amount of overtaking accuracy is thus adjusted so that KD = 1 is satisfied until the relative distance Dist reaches its determination threshold KD1 and then, in the region at the determination threshold KB1, the greater the relative distance Dist , the lower the first amount of KD override accuracy.
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Based on the Relvsp relative speed, the second overrunning accuracy calculator 501b calculates the second overrunning accuracy KR (Relvsp) by referring to the second overrunning accuracy calculation map.
Here, the calculation map for the second amount of overtaking accuracy has an ordinate that represents the second amount of overtaking accuracy KR and an abscissa that represents the Relvsp relative speed. Then, the calculation map of the second amount of overtaking accuracy is thus adjusted so that KR = 1 is satisfied until the Relvsp relative speed reaches its KR1 determination threshold and then, in the region at the KR1 determination threshold, the higher the Relvsp relative speed , the lower the second amount of overrunning accuracy KR.
Based on the Angle detection angle of the posterolateral obstacle SM, the third overtaking accuracy calculator 501c calculates the third overtaking accuracy KA (Angle) by referring to the third overtaking accuracy calculation map.
Here, the calculation map for the third amount of overtaking accuracy has an ordinate that represents the third amount of overtaking accuracy KA and an abscissa that represents the Angle detection angle. Then, the calculation map of the third amount of overtaking accuracy is adjusted so that KA = 1 is satisfied until the detection angle Angle reaches its determination threshold KA1 and then, in the region at the determination threshold KA1, the greater the angle detection angle, the lower the third amount of overtaking accuracy KA.
Here, each of the first, second and third amounts of overrunning accuracy KD, KR and KA is adjusted to have a lower limit (> 0).
According to the first modality, the detection accuracy of the overtaking state can be determined to be higher under the following conditions: the greater the relative distance Dist, the greater the relative speed Relvsp, and the closer to 90 degrees the angle of detection Angle .
An output of the overtaking precision quantity 501d receives (input) the first, second and third quantities of overtaking precision KD, KR and KA and transmits the final overtaking precision quantity aL1. Here, the first, second and third amounts of overrunning accuracy KD, KR and KA are multiplied to calculate the amount of overrunning accuracy AL1.
Here, detection of the overshoot state is implemented, for example, whether or not the following expression is satisfied.
aL1 <D_aL1
Here above, D_aL1 is a certain value (threshold of detection of overtaking) acquired 870190076710, of 08/08/2019, pg. 24/86
15/55 from the experiments and others and is less than or equal to 1. To adjust the accuracy of detection of overrun status higher, D_aL1 can be adjusted to a small value such as 0.5. Here, when aL1 is less than 1, it is determined that any of the conditions (a) to (c) above is satisfied. Then, it is indicated that the lower aL1, the higher the accuracy of detection of overrun status.
In addition, when implementing such processing, an amount of overtaking accuracy on the right is calculated aR1 by such determination based on the information of the obstacle on the right SM with respect to the MM vehicle itself. As mentioned above, when it is determined in step S50 that the possibility that the overtaking state is established is high, whether or not the overtaking state is established is determined based on the accuracy of the overtaking state in step S55, so as to accurately determine that the overtaking state is established.
Here, when a state that the amount of overrun precision aL1 (aR1) showing the overrun detection status accuracy becomes less than or equal to the certain overrun detection threshold (<1) (a state in a process of detecting the overtaking status) continue for a certain time, the F_Overtake flag (flag) showing the overtaking status determination is set to “1”. Otherwise, when the amount of overrun accuracy aL1 (aR1) showing the overrun detection detection accuracy becomes less than or equal to the override detection threshold (<1) (detecting that the override status is established) , the F_Overtake flag showing the determination of the overtaking status can be set to “1” without waiting for a certain time to continue. According to the first modality, in order to more safely detect that the overtaking state has been established, it is necessary to determine whether or not the overtaking state has continued for a certain time. In addition, when a non-overtaking state is established, the F_Overtake flag showing that the overtaking status setting is set to “0”.
Here, to calculate the amount of overtake accuracy aL1 (aR1) in step S55, it is exemplified that all of the dist relative distance, the Relvsp relative speed and the Angle detection angle are used. Otherwise, the amount of overtaking accuracy aL1 (aR1) can be calculated by one or two of these three pieces of obstacle information.
In addition, the determination of the overtaking status in step S55 can be done through the following processes.
That is, an F_ObstFront2Rear determination flag is set. When the target SM obstacle moves from the forward direction of the MM vehicle itself to the lateral or rear direction of the MM vehicle itself, the determination flag
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F_ObstFront2Rear is set to “1” until the SM obstacle is far from a recognition range. Then, the following operation is allowed: when the determination flag F_ObstFront2Rear is 1 and the amount of overrunning accuracy aL1 (aR1) becomes less than or equal to the override determination threshold, the override status is determined to be established, in order to set the F_Overtake flag (showing the determination of the overtaking status) to 1. This makes it possible more precisely to determine that the overtaking status is established.
In addition, the F_Overtake flag showing the determination of the overtaking state is reset to “0” when aL1 (aR1) becomes above the overtaking determination threshold (not in a state of detecting the overtaking state). The threshold of aL1 (aR1) that is used when the F_Overtake flag showing the determination of the overtaking state is reset to “0” may have a hysteresis in a direction where the F_Overtake flag is less likely to be canceled. That is, a cancellation purpose threshold is set higher than the threshold to determine that the overshoot state is established. In addition, the following operation is allowed: when the F_Overtake flag showing the determination of the overtaking state is set once, the F_Overtake flag is set to “0” in a situation in which the target object is not detected.
In addition, after the F_Overtake flag showing the determination of the overtaking status is once set to “1”, the F_Overtake flag is kept for a certain time and then is cleared (set to “0”). Here, the time to clear the F_Overtake flag can be i) simply a time or ii) a time from the time of detection of the overtaking state to the time point when the travel distance of the MM vehicle itself becomes a certain distance adjusted in advance. That is, in a condition that the travel distance from the overtaking state detection time point becomes greater than or equal to a certain distance set in advance, the F_Overtake flag can be cleared. Otherwise, for example, the above time may be a time until the relative distance between the MM vehicle itself and the SM obstacle becomes more than a certain distance. The above time can be varied correctly.
Step S60
Then, in step S60, detection is made whether or not the operation to change the route (by the driver) to the SM obstacle side is present.
According to the first modality, based on the information of the driver's steering and accelerator operation, the determination is made whether or not the driver has an operation to change the route to the SM obstacle on the left. For example, as stated hereinafter, through the increased steering angle a, angular steering speed Dõ, amount of accelerator depression 0t (or opening of the accelerator
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17/55 pain 0t), and the direction change signal (turn signal) of the MM vehicle itself, an amount of accuracy of detecting aL_2 route change (by the driver) in the direction of the SM obstacle on the left is calculated. Here, the increased steering angle δ can be calculated from the steering angle information (δ) of the steering angle sensor 19. The angular speed of direction Dδ can be calculated by differentiating the steering angle information (δ) from the sensor. steering angle 19. The amount of throttle depression 0t can be calculated from the throttle opening information (0t) of the throttle opening sensor 18.
Then, the amount of accuracy of detecting change of route left to L2 is calculated by the following expression.
αL2 = Kt (turn signal) x Ks (δ) x KDs (Οδ) x KAc (0t)
The calculation processing of the amount of precision of detecting the change of the route to the left aL2 is exposed referring to Fig. 6.
Fig. 6 is a block diagram showing the concept of calculating the amount of precision in detecting change of the route to the left aL2.
Based on the turn signal, a calculator for the first amount of change detection accuracy 601a calculates a first amount of change detection accuracy Kt by referring to a calculation map of the second amount of change detection accuracy route.
Here, when the turn signal to change the route to the left is not present, the calculation map for the first amount of route detection accuracy adjusts the first amount of route change detection accuracy Kt = 1, while when the turn signal to change the route to the left is detected, the calculation map of the first amount of route detection accuracy adjusts the first amount of route change detection accuracy Kt = 0.
Based on the direction angle δ, a calculator for the second amount of change detection accuracy 601b calculates a second amount of change detection accuracy Ks referring to a calculation map for the second amount of change detection accuracy of the route.
Here, the calculation map for the second amount of route change detection accuracy has an ordinate that represents the second amount of route change detection accuracy Ks and an abscissa that represents the direction angle δ. Then, the calculation map of the second amount of precision for detecting change in the route is thus adjusted Ks = 1 is satisfied when the direction angle δ is less than or equal to its determination threshold δ1 and then, in the region above the threshold of determination δ1, the greater the steering angle, the lower the second amount of accuracy in detecting change in the route Ks.
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Based on the angular direction velocity Dõ, a calculator for the third amount of change detection accuracy 601c calculates a third amount of change detection accuracy KDs by referring to a calculation map for the third route change detection accuracy amount.
Here, the calculation map for the third amount of route change detection accuracy has an ordinate that represents the third amount of route change detection accuracy KDs and an abscissa that represents the angular direction velocity Dõ. Then, the calculation map for the third amount of route change detection accuracy is adjusted so that KDs = 1 is satisfied when the angular direction velocity Dõ is less than or equal to its determination threshold Dõ1 and then, in the region at the threshold of determination Dõ1, the higher the angular speed of direction Dõ, the lower the third amount of accuracy in detecting change of the KDs route.
Based on the depressed amount of accelerator 0t, a calculator for the fourth amount of change detection accuracy 601d calculates a fourth amount of change detection accuracy KAc by referring to a calculation map of the fourth amount of detection accuracy change the route.
Here, the calculation map for the fourth amount of route change detection accuracy has an ordinate that represents a fourth amount of route change detection accuracy KAc and an abscissa that represents the accelerator depression amount 0t. Then, the calculation map for the fourth amount of precision for detecting change of route is adjusted so that KAc = 1 is satisfied when the amount of accelerator depression 0t is less than or equal to its determination threshold 0t and then, in the region in determination threshold 0t, the greater the amount of depression of the 0t accelerator, the lower the fourth amount of accuracy in detecting the change in the KAc route.
In addition, although not shown in Fig. 6, the following operation is permitted: providing a calculator for the fifth amount of route change detection accuracy, and calculating a fifth amount of route change detection accuracy based on the speed of throttle depression referring to a calculation map of the fifth amount of route change detection accuracy. This calculation map of the fifth amount of route change detection accuracy has an ordinate that represents the fifth amount of route change detection accuracy and an abscissa that represents the accelerator depression speed. Then, the calculation map of the fifth amount of change detection accuracy is adjusted so that the fifth amount of change detection accuracy = 1 is satisfied when the accelerator depression speed is less than or equal to its threshold of determination and then in the region at the threshold for determining the accelerator depression speed, the higher the accelerator depression speed, the lower the fifth amount of detection accuracy
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In addition, each of the second to fifth amounts of route change detection accuracy is adjusted to have a lower limit (> 0).
A route change detection precision quantity output 601e receives (input) the first to fourth route change detection precision quantities Kt, Ks, KDs and KAc and transmits the change quantity of the final route detection accuracy aL2. Here, the first to fourth quantities of change detection accuracy Kt, Ks, KDs and KAc are multiplied, in order to calculate the amount of change detection accuracy aL2. That is, the amount of accuracy of detection of alteration of the aL2 route is calculated by the following expression.
aL2 = Kt x Ks x kDs x KAc
In addition, the amount of aL2 route change detection accuracy can be calculated according to any of the steering angle increments obtained when the overtaking state is determined to be established and the increment of the accelerator depression amount obtained when the overtaking state is determined to be established.
Here, as the steering angle increased to, for example, the following difference can be used: (δ = str_filt_light - str_filt_heavy) which is calculated based on a str_filt_heavy steering angle obtained by submitting the steering angle information to a filter having a large time constant and a direction angle str_filt_light obtained by submitting the direction angle information to a filter having a small time constant. The increased steering angle δ thus obtained is calculated as an increased steering angle to which the angular steering speed is applied.
Then, in terms of the amount of accelerator depression, an increased amount of accelerator depression is determined as the difference that is obtained (0t filt heavy where the 0t_filt_heavy information is obtained by subjecting the accelerator opening information to a filter having a time constant large and 0t filt light information is obtained by subjecting the accelerator opening information to a filter having a small time constant. The amount of accelerator depression thus obtained is calculated as an accelerator depression amount at which a depression speed of the increased accelerator is also applied.In addition, by detecting the accelerator depression speed in place of the accelerator opening, whether or not the route change operation intention is present can be detected by the accelerator depression speed.
In addition, when angular steering speed information or accelerator depression speed information is used, these values are each detected as a momentary value. Therefore, the maximum of the value thus detected should be kept
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20/55 taken for a certain time (for example, 1 second).
In addition, an amount of accuracy in detecting aL2 route change in the direction of the right obstacle is calculated by an equal determination.
In the description above, the amount of accuracy in detecting the change in the final route aL2 (aR2) is obtained by a product of map values that were acquired by the direction change signal, direction angle information δ, angular speed information of direction Dδ, information on the amount of depression of the 0t accelerator. However, selection of these can be used to obtain the amount of accuracy of detection of alteration of the aL2 (aR2) route. Otherwise, the amount of aL2 change-detection accuracy can be calculated using one or two or three of the first to fourth amounts of change-detection accuracy Kt, Ks, KDs and KAc. That is, the amount of accuracy in detecting change of route aL2 can be anything that satisfies the following condition: the greater the precision becomes (aL2 becomes less) when the driver implements the steering operation with an intention to change the route or when the driver implements the accelerator and other operations with an intention to change the route.
Then, when the amount of aL2 (aR2) change detection accuracy becomes less than or equal to a certain determination threshold for route change (<1), it is determined that the detection that the driver intends to change of the route was made. When the intention to change the route is detected, the F_driverovertake_intention flag is set to “1”. When the amount of aL2 (aR2) route change detection accuracy becomes above a certain determination threshold for route change (adjusting hysteresis is preferable), the F_ driverovertake_intention flag is set to “0”. That is, as a condition to reset the F_driverovertake_intention flag to “0”, it should be detected that the amount of aL2 (aR2) route change detection accuracy becomes less than or equal to a certain threshold (hysteresis is adjusted for the threshold so the F_driverovertake_intention flag is likely to be canceled).
Then, when F_driverovertake_intention is "0", F_Overtake is overwritten with "0" even when F_Overtake is "1".
Processing in this step S60 can be omitted.
Step S70
Then, in step S70, the brake drive force control unit 8 calculates a neutral yaw rate φφ ^ based on the following expression (3). The neutral yaw rate φφ ^ is required for the MM vehicle itself to maintain travel along the travel road. The neutral yaw rate φφ ^ becomes zero when the MM vehicle itself is driving on a straight road. On a curved road, however, the neutral yaw rate φφ ^ will change depending on the curvature β of the curved road. Thus, the
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21/55 curvature 13 of the travel route is used to calculate the neutral yaw rate φφ ^.
Φ path = β.ν .......... (3)
Here, the neutral yaw rate φφ ^ for the MM vehicle itself to maintain the travel route can be obtained using an average ave'ave of the neutral yaw rate φφ ^ over a certain period or simply by calculating a value that is acquired by submitting a rate neutral yaw a ^ to a filter having a large time constant.
Step S80
In step S80, the brake actuation force control unit 8 adjusts the forward watch time Tt. The surveillance time ahead Tt is a certain time to determine the threshold to estimate a situation that the driver accesses the obstacle in the future. For example; the forward surveillance time Tt is set to 1 second.
Then, a Vdriver yaw rate and a correction target yaw rate
Vdrivercorrection are calculated.
The target yaw rate Vdriver is calculated from the steering angle δ and ad vehicle speed V as shown by the following expression (4). This target yaw rate Vdriver is a yaw rate that is to be caused by the driver's steering operation. That is, the target yaw rate Vdriver means a yaw rate intentionally caused by the driver.
Vdriver = Kv. δ-V ......... (4)
Here, Kv denotes a predetermined gain according to the vehicle's specifications and others.
In addition, the target yaw rate of correction Vdrivercorrection is calculated by the following expression (5). This Vdrivercorrection correction target yaw rate is obtained by subtracting the neutral yaw rate φφ ^ (required to travel the travel road) from the Vdriver target yaw rate. By this operation, an influence caused by the steering operation to traverse the curved road is deleted from the target yaw rate Vdriver.
Vdrivercorrection = Vdriver - φ path (5)
That is, the target yaw rate of correction Vdrivercorrection is a deviation from the yaw rate necessary to travel along the travel road (neutral yaw rate φ'path) from a yaw rate caused by the driver's steering operation ( gui rate nothing target Vdriver). In addition, the target yaw rate of correction Vdrivercorrection is in accordance with the intention of changing the driver's route.
Step S90
Then, in step S90, using the forward surveillance time Tt set in step S80 above and based on the following expression (6), the brake actuation force control unit 8 calculates the estimated position of the AXb vehicle itself that is the late position
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22/55 ral of the MM vehicle itself after the forward surveillance time Tt with respect to the lateral position of the current MM vehicle itself (position in the transverse direction of the travel road). That is, the lateral distance (distance in a transverse direction of the travel road) to a lateral position 150 of the MM vehicle itself after the forward surveillance time Tt of the lateral position of the current vehicle MM itself is calculated as the estimated position of the vehicle itself AXb vehicle. In addition, the estimated position of the AXb vehicle itself is used to determine whether or not preventive control with respect to the SM obstacle should be initiated, as described later.
AXb = (K1. | F + K2. <M + K3. | M ') .......... (6) where <f: yaw angle <m: angular speed of target yaw <m' : angular acceleration of the target yaw
In addition, the angular velocity of the target yaw <m is given by the following expression (7).
<m = ψdrivercorrection.Tt (7)
In addition, the angular acceleration of the target yaw <m 'is given by the following expression (8).
<m '= <m-Tt ² (8) where, to transmit the estimated position of the AXb vehicle itself in the dimension of the yaw angle, a forward surveillance distance L is used to give the following expression (9).
AXb = L. (K1 | f + K2 <m.Tt + K3 <m'.Tt ² ) (9) where the forward surveillance distance L and the forward surveillance time Tt satisfy the following expression (10) .
Forward surveillance distance L = Forward surveillance time Tt. vehicle speed V (10)
In view of the above characteristics, the established gain K1 is a value with vehicle V speed as a function. In addition, the established gain K2 is a value with vehicle speed V and forward watch time Tt as a function. The established gain K3 is a value with the vehicle speed V and the second forward surveillance time power Tt as a function.
In addition, the estimated position of the MM vehicle itself can be calculated by calculating the steering angle component and the steering angle component individually and then making a high selection of these, as shown by the following expression (11).
AXb = max (K2bm, K3f <bm ’) .......... (11)
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Step S100
Then, in step S100, the brake actuation force control unit 8 sets a determination threshold for the start of the control. This determination threshold determines whether or not the preventive control with respect to the SM posterolateral obstacle is initiated. Here, based on the lateral position of each of the MM vehicle itself and SM obstacle after the forward surveillance time Tt, this determination of the start of the preventive control in step S100 determines whether or not it is possible for the MM vehicle itself to enter the trajectory of the SM obstacle after the forward surveillance time Tt. Even when it is determined in step S100 that prevention control will be initiated, such prevention control is not necessarily to be actually started. Whether or not prevention control is actually initiated is determined in step S115 described later.
According to the first modality, with AO in Fig. 7 as the determination threshold above, the start of the prevention control is determined based on this determination threshold AO and the estimated position of the AXb vehicle itself. AO is a lateral relative distance between the MM vehicle itself and the SM obstacle whose distance was detected by the 24L / 24R radar devices.
In addition, when the lateral relative distance AO between the MM vehicle itself and the obstacle SM cannot be calculated accurately, an obstacle distance X2obst as a certain distance is used to adjust the determination threshold above. The obstacle distance X2obst is equivalent to a lateral distance to the white line 200 from a certain imaginary position (position in the transverse direction of the route) where the obstacle SM is present.
The obstacle distance X2obst becomes 0 when the certain imaginary position (position in the transverse direction of the route) where the obstacle SM is present is defined as the white line 200, is positive when outside the white line 200 and is negative when inside of the white line 200. That is, the determination threshold above is adjusted so that a lateral displacement X0 of the MM vehicle itself added by the obstacle distance X2obst in Fig. 7 is defined as an imaginary distance from the MM vehicle itself to the SM obstacle. Here, the lateral displacement X0 in Fig. 7 is equivalent to the lateral displacement Xf detected by the image capture portion 13 described above.
In addition, a certain Xthresh threshold can be adjusted as the determination threshold above. This certain threshold Xthresh is obtained by adjusting in advance how far the future position of the vehicle itself (estimated position of the AXb vehicle itself) is far from the current position. When the estimated position of the AXb vehicle itself becomes greater than the certain Xthresh threshold, the driver is performing an excessively large steering operation, thus making it possible to determine that the MM vehicle itself will enter the trajectory of the SM obstacle after the forward surveillance time Tt . In this way, the Xthresh threshold is adjusted
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24/55 to such a large value in order to safely detect that the driver of the MM vehicle itself has an intention to change the route.
Here, an X-Y coordinate system where a Y-axis is taken in one direction along the travel road and an X-axis is taken in a direction perpendicular to the travel road, that is, the transverse direction of the route is used. Then, the lateral position of the obstacle SM is detected on the geometric axis X. Based on the lateral position, the lateral relative distance ΔΟ is obtained.
In addition, the K-AREA obstacle detection area adjusted as an area for detecting the SM obstacle is thus adjusted in order to be a certain longitudinal-lateral position in the posterolateral direction of the MM vehicle itself. In addition, the longitudinal position can be adjusted so that the higher the Relvsp relative speed (SM obstacle accessing the MM vehicle itself), the larger the K-AREA obstacle detection area.
Step S110
Then, in step S110, the brake actuation force control unit 8 determines whether or not the MM vehicle itself is accessing the posterolateral SM obstacle. Here, the determination of the beginning of the control is to adjust the control determination for preventing access to the Fout_obst signal obstacle based on the positional relationship between the MM vehicle itself and the SM obstacle. Whether or not to start the control is actually determined based on the result of the one-step determination later described S115.
In step S110, when the following expression (12) is satisfied (start condition 1), it is determined that the start of the control is established.
ΔΧό> ΔΟ .......... (12)
Here, the estimated position of the vehicle ΔΧό itself in relation to the lateral relative distance ΔΟ denotes a degree of access to the SM obstacle. That is, this is synonymous with the following occasion: in the transverse direction of the route, adjusting for the position of the obstacle SM as the position to determine the start of the control (start position of the control 60), and then determining that the start of the control is established when the future position of the vehicle itself (forward surveillance point 150) after the forward surveillance time Tt is outside the start position of control 60 in the transverse direction of the route. In addition, the position in the transverse direction of the route by a certain distance from the position of the SM obstacle can be defined as the position for determining the start of the control (start position of the control 60). In this case, the lateral relative distance ΔΟ can be corrected by subtracting a certain distance from the lateral relative distance ΔΟ.
Then, with the obstacle distance X2obst used as the threshold for determining the start of the control, when the following expression (13) is satisfied (start condition 2) it is determined that the start of the control is established.
ΔX2 = ΔXb - ΔX0> X2obst .......... (13)
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That is, as shown in Fig. 7, it is determined whether or not the lateral distance ΔΧ2 between the white line 200 and the estimated future position of the MM vehicle itself (forward surveillance point 150) after the forward surveillance time Tt is greater than or equal to the obstacle distance X2obst. That is, it is determined whether or not the lateral position of the MM vehicle itself (forward surveillance point 150) after the forward surveillance time Tt is more external (in the transverse direction of the route) than the distance of the obstacle at a certain position X2obst with respect to white line 200. Then, when the 24L / 24R radar devices detect that the SM obstacle is present in the K-AREA obstacle detection area and the start condition above 2 is satisfied, it is determined that the control with respect the SM obstacle is started. When control with respect to the SM obstacle is determined to be initiated, the determination of the access prevention control to the Fout_obst flag obstacle is set to ON. On the other hand, when the above condition is not satisfied, the determination of the control to prevent access to the Fout_obst signal obstacle is set to OFF.
In addition, the Xthresh threshold can be used as the threshold for determining the start of control. In this case, when the 24L / 24R radar device detects that the SM obstacle is present in the K-AREA obstacle detection area and the following expression (14) is satisfied (start condition 3), it is determined that the beginning of the control is established.
ΔΧό> Xthresh .......... (14)
Here, the estimated position of the ΔΧό vehicle itself is actually calculated for each of the left and right sides of the MM vehicle itself respectively as ΔXbL / ΔXbR, in order to make the individual determinations.
In addition, the SM obstacle as a control target can include not only the vehicle in the posterior-lateral direction of the MM vehicle itself, but also an opposite vehicle in the forward direction of an adjacent route.
Here, when it is determined whether or not the estimated position of the vehicle ΔΧό itself is less than the determination threshold, a hysteresis equivalent for F can be provided as denoted by ΔΧό <ΔΟ - F. That is, a dead zone can be adjusted . More specifically, the dead zone can be adjusted between a control intervention threshold and a control end threshold.
In addition, determining the access prevention control for the Fout_obst flag obstacle can be set to ON when Fout_obst is OFF. In addition, as a condition to make Fout_obst made adjustable to ON, a time-related condition can be added, for example, after a lapse of a certain time after Fout_obst is triggered. In addition, after a lapse of a certain time Tcontrol after the determination that Fout_obst is ON is made, the control can be
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26/55 mined by doing Fout_obst = OFF.
In addition, when obstacle access prevention control is being implemented, a Dout_obst control implementation direction is determined in accordance with the direction of determining the estimated future position (surveillance point forward 150). When the future estimated position (forward surveillance point 150) is left, Dout_obst = LEFT, while when the future estimated position is right, Dout_obst = RIGHT.
Here, when the anti-slip control (ABS), traction control (TCS) or vehicle dynamics control unit (VDC) are in operation, the determination of the control to prevent access to the Fout_obst signal obstacle is set to OFF. This is to make the obstacle access control inoperable when the automatic brake control implemented regardless of the driver's operation is in operation.
Step S115
Then, in step S115, based on the determination of the prevention control of access to the obstacle flag Fout_obst and flag F_Overtake showing the determination of the overtaking status, whether or not to implement the control of prevention of access to the obstacle is determined.
When the determination of the prevention control of access to the obstacle Fout_obst is ON and F_Overtake = 0, it is determined that the MM vehicle itself is accessing the obstacle SM, in order to maintain the determination of the prevention control of access to the obstacle Fout_obst to ON .
On the other hand, when the determination of the preventive access control to the obstacle Fout_obst is ON and F_Overtake = 1, it is determined that the MM vehicle itself has overcome the obstacle SM and the driver intends to change the route, in order to readjust the determination of the prevention control of access to the obstacle flag Fout_obst to OFF.
In addition, when the Fout_obst flag obstacle access prevention control setting is OFF, the Fout_obst flag obstacle access control control determination is kept OFF regardless of F_Overtake.
That is, as stated above, the F_Overtake flag showing the determination of the overtaking status is set to “1” only when it is determined that the MM vehicle itself has overcome the SM obstacle and that the driver of the MM vehicle itself intends to change the route. Thus, when F_Overtake = 1, it is estimated that the driver has an intention to change the route while recognizing the SM obstacle. So in this case, even when determining access prevention control
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27/55 to the Fout_obst signal obstacle is ON, the determination of the access prevention control to the Fout_obst signal obstacle is reset to OFF in order not to implement (in order to suppress) the obstacle access prevention control.
On the other hand, when the F_Overtake flag showing that the determination of the overtaking state is set to “0”, the following first and second states are made: a first state where the MM vehicle itself has not overcome the SM obstacle and a second state where the MM vehicle itself has overcome the SM obstacle and the driver has no intention of changing the route. Thus, when F_Overtake = 0 and the control determination to prevent access to the Fout_obst flag obstacle is ON, it is estimated that the driver is accessing the SM obstacle without recognizing the SM obstacle or even that the driver recognizes the SM obstacle, the MM vehicle itself is accessing the SM obstacle without the intention of changing the driver's route. Therefore, in this case, the determination of the control to prevent access to the obstacle signaling Fout_obst is kept ON, in order to implement the control to prevent access to the obstacle.
In addition, when F_Overtake = 1, the following operation is also allowed: the determination of the preventive access control to the Fout_obst signal obstacle is kept ON so that the obstacle access prevention control is not implemented based only on the state of F_Overtake.
Step S120
Then, in step S120, alarm processing is implemented. That is, when it is determined that the control to prevent access to the Fout_obst flag obstacle is ON, an alarm sound is generated. The alarm is not limited to the alarming sound, otherwise it can be implemented by a lamp or a seat vibration.
Here, the alarm can be implemented earlier than when the forward surveillance point 150 based on the forward surveillance time Tt (lateral position of the MM vehicle itself after the forward surveillance time Tt) reaches the control start position . That is, the forward surveillance time is multiplied by a certain Kbuzz gain (> 1) so that the time is longer than the forward surveillance time Tt. Then, using the forward surveillance point 150 based on (Tt x Kbuzz), the alarm can be generated when it is determined that the forward surveillance point 150 calculated based on expression (6) has reached the determination threshold. Otherwise, when it is determined that the operation of the obstacle access prevention control is initiated, the alarm can be caused to start the control after a period of time. Otherwise, the alarm can be generated together with a state where the control output is simply implemented.
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Step S130
Then, in step S130, the brake actuation force control unit 8 adjusts the target yaw moment Ms.
When the control for preventing access to the Fout_obst signal obstacle is OFF, the target yaw moment Ms is set to 0. Then, the process moves to step S140.
On the other hand, when the determination of the access prevention control to the Fout_obst signal obstacle is ON, the target yaw moment Ms is calculated by the following expression (18). Then, the process moves to step S140.
Ms = K1.recv.K2recv.AXs .......... (18)
AXs = (K1mon ^ f + K2mon ^ m)
Here, K1recv is a proportional gain determined from the vehicle's specifications (yaw moment of inertia). K2recv is a gain that is variable according to the speed of the vehicle V. The K2recv gain is adjusted, for example, so that the K2recv gain is higher in a lower speed region, is inversely proportional to the speed of the vehicle V when the speed of vehicle V reaches a certain value, and thereafter remains constant at a small value after the speed of vehicle V reaches a certain value. The established gain K1mon is a value with vehicle speed V as a function. The established gain K2mon is a value with the vehicle speed V and The forward watch time Tt as a function.
According to expression (18), as the continuously generated yaw rate is increased by the yaw angle φf with respect to the white line 200 or by the steering operation increased by the conductor, the target yaw moment Ms is increased.
Otherwise, the target yaw moment Ms can be calculated from the following expression (19). Expression (19) is synonymous with multiplying expression (18) by the established gain K3 (= 1 / Tt ² ). The longer the surveillance time for Tt, the lower the established K3 gain.
Ms = K1recv.AXb / (L «Tt ² ) .......... (19)
The use of the expression above (19) does the following result. That is, the shorter the surveillance time ahead Tt, the stronger the amount of control. That is, adjusting the watch time forward Tt so that the start control setting is delayed will increase the amount of control at the start of the control. In addition, adjusting the watch time forward Tt so that the start control setting is triggered will decrease the amount of control. As a result, the amount of control is thus adjusted for the driver in order to conform to the adjustment of the forward surveillance point 150, thereby making it possible to implement the control that is throughout the situation and has little discomfort.
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In addition, the Fout_obst determination above estimates the future route change based on direction information.
Here, the following operation is allowed. Unlike this obstacle access prevention control, in a case that a route deviation prevention control to control the behavior of the MM vehicle itself in such a way as to prevent the route deviation when the MM vehicle itself has a possibility to do route deviation, the control started earlier {that is, any of this obstacle prevention control and route deviation prevention control (Fout LDP = 1)} is prioritized, and the other control is done so as not to be implemented until the most premature control is terminated.
Step S140
In step S140, the brake actuation force control unit 8 calculates a command to take the target yaw moment Ms to prevent the obstacle SM, and then to transmit the command. Then, the process goes back to the initial processing.
Here, according to the first modality, as a measure to take the target yaw moment Ms to prevent the SM obstacle, an example will be made in a case that the yaw moment is caused using a brake actuation force; as described below.
When a reactive steering force controller is used as a measure for causing the yaw moment, the brake actuation force control unit 8 can calculate a reactive steering force Fstr (Fstr = Ka * Ms) as a command for cause the target yaw moment Ms, and transmit the reactive steering force Fstr to the reactive steering force controller to thereby cause the reactive force. Here, Ka denotes a coefficient obtained in advance through experiments and others and converts the turning moment into the reactive steering force.
In addition, when a steering angle controller is used as a measure to cause the yaw moment, the brake actuation force control unit 8 can calculate a steering angle STR0 (STR0 Kb.Ms) as a command for cause the target yaw moment Ms and transmit the steering angle STR0 to the steering angle controller to thereby control the steering angle. Here, Kb denotes a coefficient obtained in advance through experiments and others and converts the yaw moment into the steering angle.
In addition, when the steering force controller such as a power steering and others is used as a measure to cause the yaw moment, the brake actuation force control unit 8 can calculate the steering force (steering torque ) (STRtrg = Kc.Ms) as a command to cause the target yaw moment Ms and can transmit the steering force to the steering force controller to thereby control the steering force. Here, Kc denotes a coefficient obtained in advance through
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30/55 experiments and others and converts the yaw moment into the steering angle.
According to the first modality, in the event that a difference in braking force between the right and left wheels of the vehicle is caused as a measure to cause the yaw moment, the brake actuation force control unit 8 calculates a command to cause the Ms yaw moment, as stated below.
When target yaw moment Ms is 0, that is, when yaw moment control is not implemented, brake oil pressures (brake oil pressure) Pmf, Pmr as target brake oil pressure Psi (i = fl, fr, rl, rr) from each wheel are transmitted to the brake oil pressure controller 7, as shown in the following expressions (20) and (21). As a result, the brake oil pressure controller 7 controls the fluid pressure circuit 30, thereby controlling the brake oil pressure of each wheel to the target brake oil pressure Psi (i = fl, fr, rl, rr).
Psfl = Psfr = Pmf .......... (20)
Psrl = Psrr = Pmr .......... (21)
Here, Pmf denotes a brake oil pressure for the front wheel. Pmr denotes a brake oil pressure for the rear wheel and is a value calculated based on the Pmf brake oil pressure for the front wheel in view of the front-to-rear allocation. For example, when the driver is braking, the brake oil pressures Pmf, Pmr become values according to the amount of operation (fluid pressure of the master cylinder Pm) of the braking operation.
On the other hand, when an absolute value of the target yaw moment Ms is greater than 0, that is, when the obstacle access prevention control is implemented, the following processes are implemented.
Specifically, based on the target yaw moment Ms, a target brake oil pressure difference from the front wheel APsf and a target brake oil pressure difference from the rear wheel APsr are calculated. More specifically, the pressure differences of the target brake oil APsf, APsr are respectively calculated by the following expressions (22) and (23).
APsf = 2.Kbf. (Ms.razão FR) / Tr .......... (22)
APsr = 2.Kbr. (Ms x (1 - FR ratio)) / Tr .......... (23)
Here, the FR ratio denotes an adjustment threshold, Tr denotes a tread, and Kbf and Kbr denote conversion coefficients for the front and rear wheels to convert the braking force into the brake oil pressure.
Furthermore, here for convenience, the treadmill Tr has the same value for the front and rear. In addition, Kbf, Kbr are each coefficients that are predetermined by the brake specifications.
In this way, the braking forces caused to the wheels are allocated according to
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31/55 with the target yaw moment measurement Ms. That is, a certain value is given to each of the pressure differences of the target brake oil APsf, APsr, thereby causing the difference in braking force between the right wheels and left at the front and rear. Then, the pressure differences of the target brake oil APsf, APsr thus calculated are used, in order to calculate the final target brake oil pressure Psi (i = fl, fr, rl, rr) for each wheel.
Specifically, when the direction of implementation Dout_obst of control is LEFT, that is, in the case where the obstacle access control with respect to the SM obstacle on the left is implemented, the target brake oil pressure Psi (i = fl, fr, rl, rr) of each wheel is calculated by the following expression (24).
Psfl = Pmf,
Psfr = Pmf + APsf,
Psrl = Pmr,
Psrr = Pmr + APsr .......... (24)
On the other hand, when the direction of implementation of control Dout_obst is RIGHT, that is, in the case where the obstacle access control with respect to the obstacle on the right SM is implemented, the target brake oil pressure Psi (i = fl, fr, rl, rr) for each wheel is calculated by the following expression (25).
Psfl = Pmf + APsf,
Psfr = Pmf,
Psrl = Pmr + APsr,
Psrr = Pmr .......... (25)
According to expressions (24) and (25) above, the difference in brake application force between the right and left wheels is caused so that the braking force of the wheel on the side to prevent the obstacle (ie, the lateral opposite for a direction in which the SM obstacle is present) is greater than the braking force of the wheel on the side of the SM obstacle (ie, the side in which the SM obstacle is present).
Furthermore, here, as shown by expressions (24) and (25), in view of the braking operation by the driver, that is, the brake oil pressures Pmf, Pmr, the target brake oil pressure Psi (i = fl, fr, rl, rr) of each wheel is calculated.
Then, for the brake oil pressure controller 7, the brake actuation force control unit 8 transmits the target brake oil pressure Psi (i = ft, fr, rl, rr) in this way calculated from each wheel as a command value for the brake oil pressure. By this operation, the brake oil pressure controller 7 controls the fluid pressure circuit 30, in order to control the brake oil pressure of each wheel to the target Psi brake oil pressure (i = fl, fr, rl , rr).
Operation
Then, an example of the operation of the first mode will be explained.
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Now, it is assumed that the MM vehicle itself is traveling in parallel with the MM obstacle in the rear left direction. In this case, the MM vehicle itself is not in a state of overcoming the obstacle SM, thus making the amount of overtaking precision to the left aL1 = 1 (step S50). Thus, the F_Overtake flag showing the determination of the overtaking status is “0” (step S55).
Then, based on the yaw angle φί, angular yaw speed target φm, angular yaw acceleration target φm 'and others that denote the travel status of the MM vehicle itself, the estimated position of the AXb vehicle itself is calculated as the future position of the vehicle itself after the forward surveillance time It (step S90). Then, the MM vehicle itself moves towards the side of the SM obstacle by the driver's steering operation and others, thus the estimated position of the AXb vehicle itself calculated using the forward surveillance time (Tt * Kbuzz) for the alarm if makes it greater than or equal to AO, to alert the driver (step S120). In addition, when the driver does not implement a trajectory and other adjustment of the MM vehicle itself and the estimated position of the AXb vehicle itself calculated using the forward surveillance time It for control becomes greater than or equal to AO, it is determined that the driving assistance control to prevent the SM obstacle started (step S110).
After determining that the driving assistance control is initiated, the target yaw moment Ms is calculated as the amount of control based on the estimated position of the AXb vehicle itself (step S130). Then, the brake actuation force (brake oil pressure) is thus controlled to cause the target yaw moment Ms thus calculated (step S140). For this reason, the behavior of the MM vehicle itself is controlled in the direction to prevent access to the SM obstacle (obstacle access prevention control is implemented).
In this way, when the driver makes the steering operation in the direction to access the SM obstacle without recognizing the SM obstacle, the MM vehicle's access to the SM obstacle itself can be correctly prevented.
On the other hand, as shown in Fig. 8, after overcoming the SM obstacle, the driver performs a steering operation in the direction to access the SM obstacle. In this case, it is determined that the MM vehicle itself is in a state of overcoming the obstacle SM, thereby making the amount of overtaking precision to the left aL1 <1 (step S50). In addition, the F_Overtake flag showing the determination (which is made based on the amount of overtaking precision to the left aL1) of the overtaking status becomes “1” (step S55).
When the driver makes a steering operation for the SM obstacle (steering operation in the direction of a in Fig. 8) after passing the SM obstacle on the left, the AXb vehicle's own estimated position calculated using the forward watch time Tt for
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33/55 the control becomes greater than or equal to ΔΟ, so it is determined that the control to prevent access to the obstacle is initiated. However, once the overtaking state is established, the obstacle access prevention control is not implemented as a suppression of the beginning of the obstacle access prevention control that prevents access to the SM obstacle, according to the first modality. .
As stated above, when it is detected that the MM vehicle itself is in a state of overcoming the SM obstacle, the obstacle access prevention control is not implemented. That is, when the detection that the MM vehicle itself is in a state of overcoming the SM obstacle is made, the beginning of the obstacle access prevention control is suppressed compared to when such a detection is not made. When the MM vehicle itself is overcoming the SM obstacle, it is conceived that the driver recognizes the SM obstacle. Therefore, in such a case, suppressing the start of the obstacle access prevention control can lessen the driver's discomfort that is attributable to the following operations: when the driver recognizes the SM obstacle and changes the route to a direction where the SM obstacle is present, the obstacle access control is sufficiently operated so that the MM vehicle itself is thus controlled to move away from the SM side obstacle.
In addition, according to the first modality, the amount of accuracy of detecting the change of the route to the left aL2 is calculated (step S60) as the detection of the intention to change the route. Then, only when it is detected, based on the amount of accuracy of detecting the change in the route to the left aL2, that the driver intends to change the route, the processing is implemented as soon as the F_Overtake flag showing the determination of the overtaking status becomes "1".
As a result, only when it is detected that the driver is changing the route, the beginning of the above control is intentionally suppressed. Because of this, the discomfort given to the driver can be relieved more adequately.
Here, the 24L124R radar devices are included in the side obstacle detector 50. Steps S100, S110, S120, S130 and S140 are included in the operations implemented by the obstacle access prevention controller 8B. Steps S50 and S55 are included in the operations implemented by the 8C overrun state detector. Step S60 is included in the operations implemented by the 8D change intent detector. Step S115 is included in the operations implemented by the control suppressor 8Ba.
First Mode Effect (1) A side obstacle detector 50 detects an SM obstacle present in a K-AREA obstacle detection area, with at least one posterolateral direction of the MM vehicle itself as the K- obstacle detection area AREA. The controller for preventing access to obstacle 8B implements a control for preventing access to the
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34/55 obstacle that prevents the MM vehicle itself from accessing the SM obstacle detected by the side obstacle detector 50. An overtaking status detector 8C, based on the information of the SM obstacle with reference to the MM vehicle itself, detects an overtaking state which is at least one of a first state where the MM vehicle itself is overcoming the SM obstacle and a second state where the MM vehicle itself is estimated to overcome the SM obstacle. A control suppressor 8Ba, when the determination is made that the overtaking state is established, based on detection by the 8C overtaking state detector, suppresses the start of the obstacle access prevention control compared to when the determination is not made that the overtaking state is established.
When the MM vehicle itself accesses the SM obstacle in order to satisfy the condition of beginning of the obstacle access prevention control in at least one of the first state where the MM vehicle itself is overcoming the SM obstacle and the second state where the MM vehicle itself is estimated to overcome the SM obstacle, it is assumed that the driver of the MM vehicle itself has an intention to change the route to the SM obstacle side while recognizing the presence of the obstacle. In such a case, the start of obstacle prevention control is suppressed as a result, making it possible to suppress driver discomfort. That is, as long as the discomfort given to the driver is reduced, the control of driving assistance with respect to the SM obstacle present in the postero-lateral direction of the MM vehicle itself can be implemented correctly.
(2) An 8D change intent detector detects whether or not the driver intends to change the route. When the determination is made that the overtaking state is established, based on detection by the 8C overtaking state detector, and the route change intent is detected by the 8D change intent detector, the 8Ba control suppressor suppresses the start control to prevent access to the obstacle.
When the MM vehicle itself has overcome the SM obstacle, suppressing the start of the obstacle access control control can suppress driver discomfort. In this case, only when it is detected that the driver intentionally changes the route, the start of the obstacle access prevention control is suppressed. As a result, when the driver intentionally changes the route while recognizing the presence of the SM obstacle, the start of control is suppressed, thus making it possible to more safely prevent discomfort.
The information of the SM obstacle with reference to the MM vehicle itself includes at least one of a Dist relative distance, a Relvsp relative speed and an Angle detection angle of the SM obstacle with respect to the MM vehicle itself.
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For this reason, without the need to use special devices such as intervehicle communication, infrastructure and others, the first modality can be performed by general devices installed on the vehicle such as radar devices 24L / 24R and others.
The obstacle access prevention control by the obstacle access prevention controller 8B implements at least one processing of causing the MM vehicle itself to turn in an MS direction in a direction away from the SM obstacle and alerting the driver that the MM vehicle itself is accessing the SM obstacle.
Therefore, the control to prevent the MM vehicle itself from accessing the SM obstacle can be performed.
Modified Example (1) According to the first modality, the explanation was made based on the following operations: detect in step S50 the overtaking status of the MM vehicle itself, then determine in step S55 that the overtaking status is established after a lapse certain time (time constant), and then suppress the beginning of the control to prevent access to the obstacle.
In place of the above operations, the following operations are also allowed: detecting the overtaking status of the MM vehicle itself, then determining that the overtaking state is established when the MM vehicle itself travels for a certain distance (in other words, time to travel distance has elapsed), and then suppress the beginning of the control to prevent access to the obstacle. In this case, based on the speed of the vehicle, it is determined, after a period of time, that the overtaking state is established.
In addition, the following operations are also permitted: detecting the overtaking status of the MM vehicle itself, then determining that the overtaking state is established when the relative distance Dist between the MM vehicle itself and the obstacle SM becomes a certain distance (in other words, time required for the Dist relative distance to become at a certain distance has elapsed), and then suppress the beginning of the obstacle access prevention control.
(2) According to the first modality, an explanation was made that, when the determination is made that the overtaking state is established and the intention to change the route is detected (detect that the precision of the intention to change the route is high ), the start of control is suppressed. However, only the determination that the overtaking state is established can suppress the beginning of the control.
(3) In addition, according to the first modality, when the determination is made that the overtaking state is established and the intention to change the route is detected, the beginning of the control is suppressed. However, when it is determined, during the operation of the obstacle access prevention control, that the overtaking state is
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36/55 established, suppression of the amount of control control currently implemented (ie, decreasing the yaw moment Ms) is allowed, in place of suppression of the beginning of the control.
(4) In addition, according to the first modality, an explanation was made that, based on the driver's operation, the SD change intention detector detects whether or not the route change intention is present. In its place, whether or not the intention to change the route is present can be detected based on the behavior of the vehicle.
That is, based on the behavior of the MM vehicle itself, the SD change intent detector detects whether or not the driver intends to change the route.
The intention to change the route is detected based on the behavior of the vehicle itself. For this reason, when the driver unintentionally diverts the MM vehicle itself from the route, the obstacle access prevention control is implemented, however when the driver intentionally changes the route, the beginning of the uncomfortable obstacle access control can be suppressed. .
For example, based on the change in yaw moment or change in acceleration that is caused to the MM vehicle itself by the driver's steering operation, the 8D change intent detector can detect whether or not the driver intends to change the route . The change in yaw moment or the change in acceleration can be detected, for example, by a differential value of the yaw movement or a differential value of the acceleration.
For this reason, the behavior of the MM vehicle itself can detect the intention to change the route.
(5) On the contrary, based on the movement of the MM vehicle itself in relation to the white line 200 (route marking), the change intention detector 8D can detect whether or not the driver intends to change the route. The movement of the MM vehicle itself with respect to the white line 200 is detected depending, for example, on the measurement of the lateral speed, the measurement of the yaw angle φί and others.
The intention to change the route is detected by the movement of the MM vehicle itself with respect to the white line 200. As a result, when the driver implements the change of route based on the white line 200 that the driver considers a practical route, and when the driver himself MM vehicle overtakes the SM obstacle, the start of the uncomfortable control to prevent access to the obstacle can be suppressed.
(6) Otherwise, based on the lateral speed of the MM vehicle itself in relation to the SM obstacle, the 8D change intent detector can detect whether or not the driver intends to change the route.
The intention to change the route is detected by the movement of the MM vehicle itself in relation to the SM obstacle. As a result, even the SM obstacle that you access from
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37/55 an adjacent route is considered to be a target of the obstacle access prevention control (alarm), and however, even when the route change with respect to the above obstacle is made that such route change is considered to have been implemented , thereby implementing the control to prevent access to the obstacle. In this facility, when the MM vehicle itself has overcome the SM obstacle, the beginning of the uncomfortable control to prevent access to the obstacle can be suppressed.
(7) When the Relvsp relative speed is large, the KD1 determination threshold of the Dist relative distance used for the overtaking state detector 8C to determine that the overtaking state is established may be less than when the Relvsp relative speed is small.
When the Relvsp relative speed is higher, detection that the MM vehicle itself has overcome the SM obstacle can be made in a position where the Dist relative distance is shorter. As a result, when the driver makes the change of route by adding the Relvsp relative speed in the merger and others, suppression of control according to the direction of the driver is allowed, thereby making it possible to suppress the beginning of the uncomfortable control.
(8) The KD1 determination threshold of the relative distance Dist used for the overtaking state detector 8C determines that the overtaking state is established may be lower when the Angle detection angle of the SM obstacle is arranged in a direction further back from the MM vehicle itself with reference to the direction to the MM vehicle side.
When the Angle detection angle is positioned in a direction further back than towards the side of the MM vehicle itself, for example, when the obstacle SM is in such a position to be shown in the rear view mirror of the MM vehicle itself, it can It is determined that the overtaking state is established even if the dist distance is small. As a result, the start of the uncomfortable control that is not in line with the driver's direction can be suppressed.
Second Mode
Then, the second modality will be exposed referring to the drawings. Henceforth, the same numerals or reference signs as those according to the first modality are added to the same devices and others.
According to the first modality, the explanation was made about a case where the beginning of the control is suppressed by omitting the control.
Unlike the first mode, the start of the control is suppressed by changing the start conditions of the control to make it difficult to enter the control according to the second mode.
Here, as stated above, the higher (more accurate) the accuracy of the intent
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38/55 change of route, less the amount of accuracy of detection of change of route aL2 (aR2). The accuracy of the change of route intent is defined as an accuracy of the intention of the change of route driver. However, the amount of aL2 (aR2) change detection accuracy multiplied by the aL1 (aL1) override detection accuracy amount (for example, aL2 <aL2 x aL1) can be used as an accuracy of the change intent total route.
Fig. 9 shows a flowchart showing the control of the prevention processing procedures implemented by the control unit of the brake activation force 8 according to the second modality.
According to the second modality, as shown in Fig. 9, addition of step S85 replacing step S115 is different from Fig. 4. Other structures and processing are like those according to the first modality.
Step S80
In step S80, as the first modality, the forward surveillance time Tt to determine the threshold to estimate the state where the driver accesses the SM obstacle in the future is adjusted.
Step S85
Then, in step S85, when the F_Overtake flag showing the determination of the overtaking status is “1”, the forward surveillance time Tt is readjusted by the following expressions. The forward surveillance time Tt is thus readjusted less, as a result, the forward surveillance point 150 becomes shorter. On the other hand, when the F_Overtake flag is “0”, the process moves to step S90.
Tt = Tt x aL2 (for SM obstacle on the left)
Tt = Tt x aR2 (for SM obstacle on the right)
Other structures and processing are like those according to the first modality.
Operation
When the driver performs the steering and other operations to the SM obstacle side after passing the SM obstacle on the left, as shown in Fig. 7, it is determined whether or not the estimated position of the AXb vehicle itself is calculated using the surveillance time for front Tt is greater than or equal to ΔΟ. When AXb is greater than or equal to ΔΟ, it is determined that the start of the control has been established. According to the second modality, once the forward surveillance time Tt is readjusted to be shorter, the beginning of the control is suppressed. That is, compared to when it is determined which state of non-overtaking is established, control is initiated when the MM vehicle itself makes more access to the SM obstacle, thus control is less likely to be initiated.
Thus, when it is determined that the MM vehicle itself is in the state of
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39/55 overcoming the SM side obstacle, the beginning of the obstacle access prevention control is suppressed, compared to when the determination is not made that the overtaking state is established. When the MM vehicle itself is overcoming the SM side obstacle, the driver is designed to recognize the SM side obstacle. Therefore, in such a case, suppressing the start of the obstacle access prevention control can lessen the driver's discomfort being attributable to the following operations: the obstacle access prevention control is operated sufficiently so the MM vehicle itself is thereby controlled to move away from the SM side obstacle.
In addition, the higher the accuracy of the intention to change the route, the greater the amount of suppression of the control start made (ie, the shorter the forward surveillance time Tt), thereby making it possible to implement assistance control. of driving while reducing the discomfort given to the driver.
Here, steps S60, S85 are included in the operations implemented by a determinant of the accuracy of the change intention 8Da. The surveillance time ahead Tt is the certain time.
Second Mode Effect (1) The 8Da change intent accuracy determiner (steps S60, S85) determines the route change intent accuracy detected by the 8D change intent detector. When the accuracy of the intent to change the route determined by the determinant of the accuracy of the intent to change 8Da (steps S60, S85) is high, the suppression of the start by the control suppressor 8Ba is made stronger than when the accuracy of the intent to change the route route is low.
The stronger the intention to change the driver's route, the stronger the suppression of the beginning of the control made. By this operation, for example, when the driver changes the route in a congestion where the distances to the front and rear vehicles are short, the beginning of the uncomfortable control can be suppressed when the driver intentionally changes the route.
(2) The accuracy of the intended change of route is determined based on the state of the direction indicator.
The accuracy of detection of the intention to change the route is detected by the state of the direction indicator which is the sign of direction change. For this reason, the driver explicitly shows the turn signal so that it is possible to detect early that the driver has a strong intention to overtake and change the route (accuracy of the intention to change the route is high). As a result, the beginning of uncomfortable control can be suppressed.
(3) The accuracy of the intention to change the route above is determined based on the steering angle δ or the angular steering speed Dõ.
The detection accuracy of the intention to change the route is detected by the information
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40/55 direction. By this operation, when the driver, with a noticeable movement, overcomes the SM obstacle and changes the route, the beginning of the uncomfortable control can be suppressed.
(4) The accuracy of the intention to change the above route is detected based on the acceleration status of the vehicle that is obtained from the driver's accelerator operation and others.
When the driver overtakes and changes the route while accelerating the MM vehicle itself to merge and others, the start of uncomfortable control can be suppressed.
(5) Obstacle access prevention controller 8B determines the start of obstacle access prevention control based on the future position of the vehicle itself (estimated position of the AXb vehicle itself) estimated after a certain time (surveillance time ahead Tt). The control suppressor 8Ba suppresses the start of the control to prevent access to the obstacle by shortening the certain time (watch time ahead Tt).
Shortening the certain time (forward surveillance time Tt) to estimate access to the SM obstacle suppresses the start of the control, resulting in suppression of the start of unnecessary control, making it possible to operate the control when the MM vehicle itself is close to the SM obstacle .
Third Mode
Then, the third modality will be exposed referring to the drawings. Henceforth, the same numerals or reference signs as those according to the first and second modalities are added to the same and other devices.
According to the third modality as well, the start of the control is suppressed by changing the start conditions of the control to make it difficult to get into control.
According to the second modality, in step S85, during the time when it is determined that the overtaking state is established, the forward surveillance time Tt is readjusted shorter. In contrast to this, according to the third modality, the threshold for determining the beginning of the control is readjusted to the side of the SM obstacle, in order to suppress the beginning of the control.
That is, the threshold for determining the start of the control is thus readjusted so that the threshold for starting the control is delayed according to the precision of the intention to change the driver's route. This reset is implemented only when the F_Overtake flag showing the determination of the overtaking status is 1.
Fig. 10 is a flowchart showing the control of the prevention processing procedures implemented by the control unit of the brake activation force 8 according to the third modality.
In the processes shown in Fig. 10, addition of step S105 replacing the
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41/55 step S115 (deleted) is different from Fig. 4.
That is, in step S105, when the F_Overtake flag showing the determination of the overtaking state is “1”, the determination threshold for the start of the control is reset to the side of the SM obstacle, on the other hand, when the F_Overtake flag is “0”, the process moves to step S110.
Readjustment of the determination threshold to start the control will be exposed.
Here, as explained in step S110 according to the first modality, when start condition 1 is used, that is, with “AXb> ΔΟ .......... (12)” as the start condition , the determination threshold for the beginning of the control is ΔΟ. When start condition 2 is used, that is, with “ΔΧ2 = ΔΧ - ΔΧ0> X2obst .......... (13)” as the start condition, the threshold for determining the start of control is X2obst.
In contrast to this, when the F_Overtake flag is “1”, the following processes are implemented in order to readjust the determination threshold.
In principle, ΔXOcorrection (> 1) is calculated.
This ΔXOcorrection is thus adjusted that the lower the amount of accuracy in detecting aL2 (aR2) route change, the greater the ΔXOcorrection. Otherwise, ΔΧΟοοε rection can be constant.
Then, the determination threshold for beginning the control is calculated based on the following expression.
For Start Condition 1
ΔΟ ΔΟ + ΔXOcorrection
For Start Condition 2
X2obst <X2obst + ΔXOcorrection
Other structures are like those according to the first and second modalities.
Operation
After the MM vehicle itself overcomes the SM obstacle on the left, the driver implements the steering operation and others to the SM obstacle side (one in Fig. 8), then, as shown in Fig. 7, it is determined whether or not the estimated position of the vehicle ΔXb calculated using the forward surveillance time Tt for control is greater than or equal to ΔΟ. When ΔXb is greater than or equal to ΔΟ, it is determined that the beginning of the control is established. In this case, according to the third modality, ΔΟ is set large, that is, the determination threshold for the start of the control is reset to the side of the SM obstacle in the transverse direction of the route, thus suppressing the start of the control. That is, compared to when it is determined that a non-overtaking state is established, control is initiated when the MM vehicle itself makes more access to the SM obstacle, so control is less likely to be initiated.
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In this way, when it is determined that the MM vehicle itself is in the state of overcoming the SM side obstacle, the beginning of the obstacle access prevention control is suppressed, compared with when the determination is not made that the overtaking state is established. When the MM vehicle itself is overcoming the SM side obstacle, it is conceived that the driver recognizes the SM side obstacle. Therefore, in such a case, suppressing the start of the obstacle access prevention control can lessen the driver discomfort that is attributable to the following operations: the obstacle access prevention control is sufficiently operated in this way the MM vehicle itself is like this controlled to move away from the SM side obstacle.
In addition, the higher the accuracy of the intention to change the route, the greater the amount of suppression of the start of control, thereby making it possible to implement the control of driving assistance while still reducing the discomfort given to the driver.
Here, step S105 is included in operations implemented by the 8Da change intent accuracy determiner.
Effect of the Third Mode (1) The obstacle access prevention controller 8B determines the beginning of the obstacle access prevention control based on the SM obstacle or the start position of the control 60 which is adjusted with respect to the white line 200. The control suppressor 8Ba suppresses the start of the obstacle access prevention control by changing the setting of the control start position 60 for the SM obstacle side.
The control start threshold that has been set with reference to the white line 200 is set to the inside (obstacle side SM), in order to suppress the control start. By this operation, the beginning of unnecessary control is suppressed, making it possible to operate the control when the MM vehicle itself approaches the SM obstacle.
Fourth modality
Then, the fourth modality will be exposed referring to the drawings. Henceforth, the same numerals or reference signs as those according to the first to third modalities are added to the same devices and others.
According to the fourth modality as well, the start of the control is suppressed by changing the start conditions of the control to make it difficult to get into control.
According to the second modality, in step S85, during the time when it is determined that the overtaking state is established, the forward surveillance time Tt is readjusted shorter. In contrast, according to the fourth modality, the K-AREA obstacle detection area is temporarily altered to a lesser extent to suppress the start of control.
The flowchart showing the control of the prevention processing procedures implemented by the brake drive force control unit 8 of
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43/55 according to the fourth modality is shown in Fig. 10 as the third modality.
However, processing in step S105 according to the fourth modality is different from processing in step S105 according to the third modality. Such different processes will be exposed.
In step S105 according to the fourth modality, when the F_Overtake flag showing the determination of the overtaking state is 0, the process moves to step S110. This operation is the same as in step S105 according to the third modality. On the other hand, in step S105 according to the fourth modality, when the F_Overtake flag showing the determination of the overtaking status is 1, the following processes are implemented.
That is, the K-AREA obstacle detection area to adjust whether or not to detect the SM obstacle is changed by the following expression. Fig. 11 shows an example of the state after such a change.
Longitudinal range = Longitudinal range x aL2 (aR2)
Sideband = Sideband x aL2 (aL2)
A limit position on the side of the MM vehicle itself (longitudinal position and lateral position) in the K-AREA obstacle detection area is adjusted to change the longitudinal and lateral width in the detection range. That is, the range indicated by a dashed line in Fig. 11 denotes the K-AREA obstacle detection area before the change, while the range indicated by a continuous line denotes the K-AREA obstacle detection area after the change.
Then, based on the detection signals from the 24L / 24R radar devices, it is determined whether or not the SM obstacle is present in the KAREA obstacle detection area thus altered. Determining that the SM obstacle is present in the altered K-AREA obstacle detection area, the process moves to step S110. On the other hand, determining that the SM obstacle is not present in the altered K-AREA obstacle detection area, the process ends the processing and returns.
Other structures are like those according to the first and second modalities.
Operation
After the MM vehicle itself overcomes the SM obstacle on the left, the driver implements the steering and other operations to the side of the SM obstacle, then, as shown in Fig. 11, it is determined whether or not the estimated position of the AXb vehicle itself calculated or not. using the forward surveillance time Tt for control is greater than or equal to ΔΟ. When AXb is greater than or equal to ΔΟ, it is determined that the beginning of the control is established. In this case, according to the fourth modality, it is determined whether or not the SM obstacle is present in the K-AREA obstacle detection area which is corrected less. When the
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44/55 SM obstacle is not present, control is not started. That is, compared to when it is determined that the overtaking state is established, control is initiated when the MM vehicle itself makes more access to the SM obstacle.
In this way, when it is determined that the MM vehicle itself is in the state of overcoming the SM side obstacle, the beginning of the obstacle access prevention control is suppressed, compared with when the determination is not made that the overtaking state is established. When the MM vehicle itself is overcoming the SM side obstacle, it is conceived that the driver recognizes the SM side obstacle. Therefore, in such a case, suppressing the start of the obstacle access prevention control can lessen the driver discomfort that is attributable to the following operations: the obstacle access prevention control is sufficiently operated in this way the MM vehicle itself is like this controlled to move away from the SM side obstacle.
In addition, the higher the accuracy of the intention to change the route, the greater the amount of suppression of the above control start, thus making it possible to implement the driving assistance control while further reducing the discomfort given to the driver.
Here, step S105 is included in operations implemented by the 8Da change intent accuracy determiner.
Effect of the Fourth Mode (1) The control suppressor 8Ba suppresses the beginning of the obstacle access prevention control by reducing the K-AREA obstacle detection area.
Minorizing the K-AREA obstacle detection area to detect the SM obstacle. as a control target it suppresses the beginning of the obstacle prevention control. By this operation, the control can be operated when the MM vehicle itself approaches the SM obstacle, suppressing the beginning of unnecessary control.
Modified Example (1) In step S105, the obstacle detection area K-AREA to determine whether or not the obstacle is present has been changed. Instead, when the F_Overtake flag = 1, an obstacle detection range in itself for the 24L / 24R radar devices can be changed to perform.
Fifth Mode
Then, the fifth modality will be exposed referring to the drawings. Henceforth, the same numerals or reference signs as those according to the first to fourth modalities are added to the same devices and others. According to the first to fourth modalities, control is suppressed by suppressing the beginning determination of the control to prevent access to the obstacle. However, according to the fifth modality, the control is suppressed by removing the amount of control from the control to prevent access to the obstacle.
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Structure
The image capture portion 13 according to the fifth mode detects a state of fusion in the forward-to-side direction of travel of the MM vehicle itself. Specifically, based on the capture image in the forward direction of the MM vehicle itself, the image capture portion 13 detects a Dist_lane distance from the MM vehicle itself to the melting point 300.
That is, as the first modality, the image capture portion 13 according to the fifth modality calculates the yaw angle φί, the lateral displacement Xf and the curvature β of the travel route, and, based on the image in the direction to in front of the MM vehicle itself, it detects that the route on which the MM vehicle itself is traveling merges with the adjacent route. Upon detecting the merger, the image capture portion 13 detects the Dist_lane distance from the MM vehicle itself to the melting point 300 at which the route of the MM vehicle itself merges with the adjacent route. Here, the detection, based on the image in the forward direction of the MM vehicle itself, that the travel route of the MM vehicle itself merges with the adjacent route, can be determined from the white line configuration (route marker configuration) or signal of the melting point detected from the image in the forward direction of the MM vehicle itself, and is a known technique, therefore explanation of such a known technique is omitted. In addition, according to the fifth modality, the image (in the forward direction of the MM vehicle itself) taken by the image capture portion 13, the merger (the travel route of the MM vehicle itself with the adjacent route) and the distance Dist_lane for melting point 300 is detected, but not limited to it. Otherwise, for example, the following operations are allowed: detecting the melting point 300 of, for example, the map information from the navigation system, and then detecting the Dist _lane distance to the melting point 300 based on the fusion 300 thus detected and in the detected position of the MM vehicle itself by a GPS (Global Positioning System).
Fig. 12 is a flow chart to adjust the processing according to the fifth modality. The flowchart in Fig. 12 omits the processing of step S115 in the flowchart (refer to Fig. 4) according to the first modality while adding step S125 to it. Other processes are like those according to the first modality, therefore, explanations of them are now omitted.
In step S125, the brake actuation force control unit 8 calculates a gain subsequently described K3recv (<1) according to the state that the MM vehicle itself is overcoming the side obstacle SM. Here, the K3recv gain gets smaller as the determination that the MM vehicle itself is overcoming the SM side obstacle is also made (as the overtaking status accuracy is higher).
From now on, a method of calculating the K3recv gain implemented in step S125 will be exposed. Fig. 13 is a flow chart showing the procedures for processing
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Step S1051
In the beginning, in step S1051, the brake actuation force control unit 8 acquires various data. Then, the process moves to step S1052. In step S1051, as in step S10 in Fig. 4 exposed above, the brake drive force control unit 8 acquires each wheel speed Vwi (i = fl, fr, rl, rr), the steering angle δ, the throttle opening φΐ, the pressure of the master cylinder fluids Pm, which are detected by each of the sensors including the wheel speed sensors 22FL, 22FR, 22LR, 22RR, the steering angle sensor 19, the opening sensor of the accelerator 18, and the pressure sensor of the master cylinder 17. In addition, the brake actuation force control unit 8 acquires i) the direction change signal from the direction indicator switch 20, ii) the steering angle yaw ,ί, lateral displacement Xf, curvature β of the travel route being detected by the image capture portion 13, and iii) the side obstacle SM information detected by the 24L / 24R radar devices (lateral obstacle detector 50). Unlike the above, the brake actuation force control unit 8 acquires i) the information of the obstacle ahead SM and ii) the state of fusion of the vehicle's own travel route.
Here, the information of the obstacle ahead SM includes the distance Dist_pre between the MM vehicle itself and the obstacle ahead SM and the relative speed Relvsp_pre between the MM vehicle itself and the obstacle SM being detected by the radar device 23. In addition, the merger status of the vehicle's own travel route is denoted by the distance Dist_lane from the MM vehicle itself to the melting point 300 in the forward direction of the MM vehicle itself.
Step S1052
In step S1052, the amount of overtaking accuracy aL1 is calculated using processes such as those in step S55 in the flowchart in Fig. 4.
Step S1053
Then, in step S1053, as in step S55 in Fig. 4, the brake drive force control unit 8 determines whether or not the amount of overrunning accuracy aL1 calculated in step S1052 is less than the overrun detection threshold. "D_aL1 (<1)".
Step S1054
Then, when aL1> D_aL1, it is determined that the overrun state is not established, and then the process moves to step S1054. With gain K3recv = 1, the calculation of the gain calculation to the left K3recv is terminated.
Step S1055
On the other hand, when aL1 <D_aL1 is determined in step S1053, it is determined that the override state is established, and then the process moves to the step
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S1055. Then, it is determined whether or not a certain time has elapsed after the overrun state has been detected (ie after aL1> D_aL has changed to aL1 <D_aL1).
Then, when a certain time has elapsed, the process moves to step S1054 above, when a certain time has not elapsed, the process moves to step S1056.
Step S1056
In step S1056, based on the driver operations acquired in step S1051, the brake actuation force control unit 8 calculates the amount of accuracy of detecting left-hand route aL2 through processing like those in step S60 in the flowchart in Fig. 4 declared above.
Step S1057
Then, in step S1057, based on the information on the front obstacle SM acquired in step S1051, the brake actuation force control unit 8 calculates an access determination amount a3 to the front obstacle SM.
As the information of the obstacle ahead SM, the Dist_pre distance between the MM vehicle itself and the obstacle SM and the Relvsp_pre relative speed between the MM vehicle itself and the obstacle ahead SM is used.
In principle, based on the following expression (26), a TTC reach time (obstacle reach time) for the MM vehicle itself to reach the obstacle ahead SM is calculated.
TTC = Dist_pre / Relvsp_pre .......... (26)
Then, the amount of access determination a3 is thus calculated that the shorter the reach time of the obstacle TTC thus calculated, the smaller the amount of access determination a3 for the obstacle ahead SM.
Step S1058
Then, in step S1058, the brake drive force control unit 8 calculates a fusion state determination amount a4 based on the fusion state (in the forward-and-side direction of the travel route itself vehicle) purchased in step S1051 above.
As shown in Fig. 14, as the fusion state in the forward-and-side direction of the vehicle's own travel route, the Dist_lane distance from the MM vehicle itself at the melting point 300 is used.
In the beginning, based on the distance Dist_lane to the melting point 300, the speed of the vehicle V itself and the acceleration of the vehicle dV itself, the reach time (reach time of the melting point) Tg for the MM vehicle itself to reach the melting point 300 is calculated. Then, the amount of determination of the melting state a4 is thus calculated that the shorter the time to reach the melting point Tg thus calculated, the less the amount of determination of the melting state a4.
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Step S1059
Then, in step S1059, the brake actuation force control unit 8 calculates the gain on the left K3recv based on the amount of overrunning accuracy aL1 calculated in step S1052, on the amount of accuracy of detecting change of the route on the left αL2 calculated in step S1056, in the amount of determination of access α3 calculated in step S1057 and in the amount of determination of fusion state α4 calculated in step S1058.
K3recv = αL1.αL2.α3.α4 ........... (27)
In addition, in step S125, a gain to the right K3recv is also calculated. The gain on the right K3recv is calculated based on the following expression (28).
K3recv = αΙ21.αΙ22.α3.α4 .......... (28)
Based on the information of the obstacle on the right in relation to the MM vehicle itself, the amount of overtaking accuracy on the right αΙ21 is calculated by the procedure as that of the amount of overtaking accuracy on the left αL1 exposed above.
Based on the driver's steering operation, the amount of accuracy of detecting change of route αR2 in the direction of the obstacle on the right is calculated by a procedure like that of the amount of accuracy of detecting change in route αL2 in the direction of the obstacle on the left . In addition, the amount of determination of access a3 to the obstacle ahead SM and the amount of determination of the fusion state α4 use a common value on the right and left sides.
In this way, the K3recv gain is calculated in step S125, and the process moves to step S130.
Then, in step S130, the brake actuation force control unit 8 adjusts the target yaw moment Ms.
When the control for preventing access to the Fout_obst signal obstacle is OFF, the target yaw moment Ms is set to 0, and then the process moves to step S140.
On the other hand, when the determination of the access prevention control to the Fout_obst signal obstacle is ON, the target yaw moment Ms is calculated by the following expression (29), and then the process moves to step S140.
Ms = K1recv * K2recvAXs * K3recv .......... (29)
AXs = (K1mon ^ f + K2mon ^ m)
Here, K1recv, K2recv, K1mon and K2mon are gains that are adjusted in a way like that of the expression above (18).
According to expression (29), as the continuously caused yaw rate is made greater by the yaw angle 44 with respect to the white line 200 or by the steering operation increased by the driver, the target yaw moment Ms becomes greater.
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Other structures are like those according to the first and second modalities.
Operation
Then, the operations of the fifth modality will be exposed referring to Fig. 15.
Now, as shown in Fig. 15 (a), it is assumed that the MM vehicle itself is traveling in parallel with the SM obstacle on the left at substantially the same speed. In this case, the MM vehicle itself is not in a state of overcoming the side obstacle SM, thereby making the amount of overtaking precision on the left aL1> D_aL1 (step S1053 in Fig. 13). In this way, the gain used for the control on the left becomes K3recv = 1 (step S1054).
In the beginning, based on the yaw angle φί, the angular speed of the target yaw φm, the angular acceleration of the target yaw φm 'that are acquired when the MM vehicle itself is traveling, the estimated position of the AXb vehicle itself (refer to Fig 7) is calculated as the future position of the vehicle itself after the forward surveillance time Tt (step S90). Then, the MM vehicle itself moves to the side of the SM obstacle by the driver's steering operation (one in Fig. 15 (a)), thus the estimated position of the AXb vehicle itself calculated using the forward surveillance time (Tt .Kbuzz) for the alarm becomes greater than or equal to AO, to alert the driver (step S120). Thereafter, when the driver does not implement track and other amendments of the MM vehicle itself and the estimated position of the AXb vehicle itself calculated using the forward surveillance time Tt for control to become greater than or equal to AO, it is determined that the control of driving assistance to prevent the SM obstacle started (step S110).
After determining that the control is started, the target yaw moment Ms is calculated as the control quantity based on the estimated position of the AXb vehicle itself (step S130). In this case, since K3recv = 1 as stated above, suppression of the target yaw moment measurement Ms is not implemented.
Then, the brake actuation force (brake oil pressure) is thus controlled to cause the target yaw moment Ms thus calculated (step S140). By this operation, the MM vehicle itself is controlled in a direction to prevent access to the SM obstacle (β1 in Fig. 15 (a)).
In this way, when the driver performs the steering operation in one direction to access the SM side obstacle without recognizing the SM side obstacle, the MM vehicle's access to the SM side obstacle itself can be prevented correctly.
On the other hand, as shown in Fig. 15 (b), it is assumed that the MM vehicle itself overtook the side obstacle SM at a higher speed than the side obstacle SM and then the driver makes a steering operation in one direction to access the SM side obstacle. In this case, it is determined that the MM vehicle itself is in a state of
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When the driver makes a steering operation to the left side of the obstacle SM after overcoming the obstacle SM on the left (α in Fig. 15 (b)), the estimated position of the vehicle AXb itself calculated using the forward watch time Tt for control it becomes greater than or equal to ΔΘ (refer to Fig. 7), so it is determined that the driving assistance control has started. Then, based on the estimated position of the ΔXb vehicle itself, the target yaw moment Ms is calculated (step S130). In this case, once K3recv <1 as stated above, the measure of the target yaw moment Ms (ie, the control amount) is calculated less compared to when the MM vehicle itself is not in the overtaking state in Fig. 15 ( a), even if the estimated position of the ΔXb vehicle itself is the same. In this way, the obstacle access prevention control to prevent access to the SM obstacle is suppressed (β2 in Fig. 15 (b)).
In this way, when it is detected that the MM vehicle itself is in a state of overcoming the SM side obstacle, the amount of control of the obstacle access control control is suppressed compared to when the overtaking state is not detected. When the MM vehicle itself is overcoming the SM side obstacle, it is conceived that the driver recognizes the SM side obstacle. Therefore, in such a case, suppressing the amount of control of the obstacle access control can decrease the driver discomfort that is attributable to the following operations: the obstacle access control is sufficiently operated in this way the MM vehicle itself it is thus controlled to move away from the SM side obstacle.
In addition, the higher the accuracy of the overtaking state (that is, the lower the amount of overtaking accuracy on the left aL1 or the amount of overtaking accuracy on the right αΡ1), the greater the amount of suppression of the above control quantity, thereby making it possible to implement the control of driving assistance while reducing the discomfort given to the driver.
In addition, the higher the driver's direction intent accuracy (that is, the lower the amount of left-shift detection accuracy αL2 or the amount of right-shift detection accuracy αΡ2) after the MM vehicle itself has overcome the SM side obstacle, the greater the amount of suppression of the amount of control of the obstacle access control, thereby making it possible for the driver to implement the steering operation without discomfort.
Furthermore, in a state where the possibility of the driver's steering intention is high after the MM vehicle itself has overcome the SM side obstacle, that is, in such cases as the MM vehicle itself is accessing the SM forward obstacle or the point fusion
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300 is present in the forward direction of the vehicle's travel route, the amount of control of the obstacle access prevention control is largely provided. Because of this, the discomfort given to the driver can be further reduced.
Here, the radar device 23 is included in an obstacle detector at the front. The image capture portion 13 is included in a melting point detector. Step 1053 in Fig. 13 is included in the operations implemented by the overrun state detector 8C and steps S1056 to S1059 are included in the operations implemented by the control suppressor 8Ba. In addition, step S1057 is included in operations implemented by an obstacle reach time calculator and step S1058 is included in operations implemented by a melting point reach calculator.
Effect of the Fifth Mode
A side obstacle detector 50 detects an SM obstacle present in a K-AREA obstacle detection area, with at least one posterolateral direction of an MM vehicle itself as the K-AREA obstacle detection area. Obstacle access control controller 8B controls the MM vehicle itself in such a way as to prevent the MM vehicle itself from accessing the SM obstacle. An overtaking state detector 8C detects, based on information from the SM obstacle with reference to the MM vehicle itself, an overtaking state that is at least one of a first state where the MM vehicle itself is overcoming the SM obstacle and a second state where the MM vehicle itself is estimated to overcome the SM obstacle. A control suppressor 8Ba, when the determination is made that the override state is established based on the detection of the override state detector 8C, suppresses the amount of control by the obstacle access control controller 8B compared to when it is not done the determination that the overtaking state is established.
In this way, when the state where the MM vehicle itself is overcoming the SM side obstacle is detected, the amount of control control to prevent access to the SM side obstacle is suppressed compared to when the state where the MM vehicle itself is overcoming the obstacle SM side is not detected. In this way, when the driver implements the steering operation in one direction to access the SM side obstacle while recognizing the SM side obstacle, the MM vehicle's own prevention of accessing the SM side obstacle can be suppressed.
In this way, although the control operation causing discomfort for the driver is suppressed, the MM vehicle's access to the SM obstacle itself can be correctly prevented.
(2) The 8D change intent detector detects the driver's change of route intent (the driver's steering operation in one direction to access the SM side obstacle). When the 8D change intent detector detects, for a certain time,
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52/55 the drive operation in the direction to access the SM side obstacle after the 8C overrun state detector detects the override state, the control suppressor 8Ba increases the amount of suppression of the control amount of the access prevention control to the obstacle.
Thus, when the operation to access in the direction of the SM side obstacle (intention to change the route in the direction of the SM obstacle) is detected after the MM vehicle itself has passed the SM side obstacle, the amount of suppression of the access prevention control the obstacle is corrected to be large. In this way, the driver's discomfort can be effectively reduced.
(3) The obstacle detector ahead (radar device 23) detects the SM obstacle present in a forward direction of the MM vehicle itself. The obstacle reach time calculator (step S1057) calculates a TTC obstacle reach time for the MM vehicle itself to reach the obstacle ahead SM detected by the obstacle detector ahead (radar device 23). The shorter the TTC obstacle reach time calculated by the obstacle reach time calculator (step S1057), the greater the amount of suppression of the obstacle access control control amount adjusted by the 8pa control suppressor.
Thus, in a situation that the operation to access in the direction of the SM side obstacle is estimated after the MM vehicle itself has overcome the SM lateral obstacle, the amount of suppression of the obstacle access prevention control can be corrected to be large. In this way, the driver's discomfort can be effectively reduced.
(4) A melting point detector (image capture portion 13) detects a melting point 300 in a forward-and-sideways direction of a travel route of the MM vehicle itself. A melting point reach calculator (S1058) calculates a melting point reach time Tg for the MM vehicle itself to reach the melting point 300 detected by the melting point detector (image capture portion 13). The shorter the melting point reach time Tg calculated by the melting point reach time calculator (S1058), the greater the amount of suppression of the obstacle access control control amount set by the control suppressor 8Ba .
Thus, in a situation that the operation to access in the direction of the SM side obstacle is estimated after the MM vehicle itself has overcome the SM lateral obstacle, the amount of suppression of the obstacle access prevention control can be corrected to be large. In this way, the driver's discomfort can be effectively reduced.
(5) When the side obstacle SM towards the side of the MM vehicle itself is
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In this way, while the uncomfortable control operation that can be felt by the driver when the driver makes a steering operation while recognizing the SM side obstacle, the MM vehicle's own access to the SM obstacle can be prevented correctly.
Modified Example (1) According to the fifth modality, in step S1053 in Fig. 13, the explanation was made in such a case that, when the state of overtaking the MM vehicle itself is detected, the amount of control of the prevention control access to the obstacle is suppressed. Otherwise, after the overtaking status of the MM vehicle itself is detected, suppression of the amount of control of the obstacle access control can be continued for a certain time. In addition, during a certain time, the amount of control of the obstacle access control control can be suppressed until the MM vehicle itself makes a certain distance trip (that is, until the time required for the certain distance trip to take place) .
In addition, after the overtaking status of the MM vehicle itself is detected, for a certain time, the amount of control of the obstacle access control control can be suppressed up to the relative distance Dist between the MM vehicle itself and the SM side obstacle become at a certain distance (up to the time required for the Dist relative distance to become at a certain distance have elapsed).
(2) According to the fifth modality, the explanation was made about such a case that the amount of suppression of the amount of control of the obstacle access control is adjusted according to the detection / estimation results (of the direction for access to the SM side obstacle) that are obtained after the overtaking status of the MM vehicle itself has been detected. However, the amount of suppression above can be adjusted at least according to the result of detecting the overtaking status of the MM vehicle itself. That is, in the processing in Fig. 13, the following equations are allowed: aL2 (aR2) = 1, α3 = 1, and α4 = 1. In this case, when the overtaking state of the MM vehicle itself is simply detected, the quantity control of the obstacle access prevention control is suppressed according to the accuracy of the overtaking state. By this operation, a simple structure can suppress the ope
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54/55 control rations having discomfort that can be caused when the driver makes the steering operation while recognizing the SM side obstacle.
(3) According to the fifth modality, the explanation was made about such a case that the amount of suppression of the amount of control of the obstacle access prevention control is adjusted when the MM vehicle's overtaking state is detected ( when a positive determination is made in step S1053 in Fig. 13). However, the amount of suppression of the amount of control of the obstacle access prevention control can be adjusted only when the overtaking status of the MM vehicle itself is detected and the driver of the MM vehicle itself has an intention to drive. That is, the following operations are allowed: when the overrun state of the MM vehicle itself is detected, whether or not the amount of aL2 (ccR2) route change detection accuracy is less than or equal to a certain threshold is determined, and when the amount of accuracy of detection of alteration of the route aL2 (aR2) is less than or equal to a certain threshold, it is determined that the driver intends to change the route in order to adjust the amount of suppression of the amount of control of the prevention control access to the obstacle.
(4) In addition, the method of determining that the driver intends to change the route is not limited to the method stated above of making the determination based on the amount of accuracy in detecting aL2 (aR2) change of route. Otherwise, for example, as stated according to the first modality, the behavior of the vehicle, the movement of the MM vehicle itself in relation to the white line 200 (route marker), the lateral speed of the MM vehicle itself in relation to the SM obstacle and others can be used for determination.
In addition, according to the first to fourth modalities, suppression of the determination of the beginning of the control when the MM vehicle itself overtakes the other SM vehicle suppresses the obstacle access control control, and according to the fifth modality, suppress the quantity control (target yaw moment Ms) when the MM vehicle itself overtakes the other SM vehicle suppresses the obstacle access control. However, the present invention is not limited to the above. That is, when the MM vehicle itself overtakes the other SM vehicle, both the suppression of the determination of the start of the control and the suppression of the amount of control are allowed.
In this case, the degree of freedom to implement suppression of control is intensified.
The entire contents of basic Japanese Patent Application No. 2009-167049 (filed on July 15, 2009 in Japan), Japanese Patent Application No. 2009-292704 (filed on December 24, 2009 in Japan) and Patent Application Japanese No. 2010135077 (deposited on June 14, 2010 in Japan) are hereby incorporated by reference
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55/55 to protect this patent application from erroneous translations or missing portions.
As stated above, the contents of the present invention have been exposed according to the first to fifth modalities as well as their modified examples. However, the present invention is not limited to the above descriptions. It is obvious to those skilled in the art that various modifications and improvements are permitted.
Industrial Applicability
When the driver's own vehicle accesses the obstacle in order to satisfy the start condition of the prevention control of access to the obstacle in a situation where it can be determined that the driver's own vehicle is in an ultra10 state to pass the obstacle or in a state estimated to overcome the obstacle, it is assumed that the driver has an intention to change the route to the side of the obstacle while recognizing the presence of the obstacle. Under the present invention, in such a case, the control to prevent access to the obstacle is suppressed, as a result, making it possible to suppress driver discomfort. That is, while decreasing the discomfort given to the driver, the present invention can correctly implement the control of driving assistance with respect to the obstacle positioned in the posterolateral direction of the vehicle itself.

权利要求:
Claims (14)
[1]
1. Vehicle driving assistant comprises:
a lateral obstacle detector (50) to detect an obstacle (SM) present in an obstacle detection area (K-AREA), with at least one postero-lateral direction of a vehicle itself (MM) as the detection area of obstacle (K-AREA);
obstacle access prevention controller (8B) to implement an obstacle access prevention control that helps prevent access to prevent the vehicle itself (MM) from accessing the obstacle (SM) detected by the side obstacle detector (50) ;
a future position estimator (8A) to estimate a future position (150) which is a position of the vehicle itself (MM) after a certain time (Tt), in which the obstacle access prevention controller (8B) determines a start of the prevention control of access to the obstacle based on the future position (150) estimated by the future position estimator (8A), CHARACTERIZED by the fact that:
an overtaking state detector (8C) to detect an overtaking state that is at least one of a first state where the vehicle itself (MM) is overcoming the obstacle (SM) detected by the side obstacle detector (50) and a second state where the vehicle itself (MM) is estimated to overcome the obstacle (SM);
a control suppressor (8Ba), when a determination is made that the overtaking state is established, based on detection by the overtaking status detector (8C), to suppress the obstacle access prevention control compared to when it is not determination is made that the overtaking status is established; where when the determination is made that the override state is established, based on detection by the override state detector (8C), the control suppressor (8Ba) suppresses the beginning of the obstacle access prevention control by the override controller prevention of access to the obstacle (8B) compared to when the determination is not made that the overtaking state is established, in order to suppress the prevention control of access to the obstacle.
[2]
2. Vehicle driving assistant, according to claim 1, CHARACTERIZED by the fact that the control suppressor (8Ba) suppresses the beginning of the obstacle access prevention control by reducing the obstacle detection area (K-AREA) .
[3]
3. Vehicle driving assistant, according to claim 1, CHARACTERIZED by the fact that the obstacle access prevention controller (8B) determines that the beginning of the obstacle access prevention control is established, when the future position
Petition 870190076710, of 08/08/2019, p. 66/86
2/5 (150) of the vehicle itself (MM) after the certain time estimated (Tt) by the future position estimator (8A) is outside the obstacle (SM) or outside a control start position in a transverse direction of the route where the start position of the control is set at a certain distance from a route marker (200), and when the determination is made that the overtaking state is established, based on detection by the overtaking state detector (8C), the control suppressor (8Ba) changes the start position of the control to the side of the obstacle, in order to suppress the beginning of the control to prevent access to the obstacle.
[4]
4. Vehicle driving assistant, according to claim 1, CHARACTERIZED by the fact that the control suppressor (8Ba) suppresses the beginning of the obstacle access prevention control by shortening the certain time (Tt) used by the position estimator (8A) to estimate the future position (150).
[5]
5. Vehicle driving assistant, according to claim 1, CHARACTERIZED by the fact that the obstacle access prevention controller (8B) controls the vehicle itself (MM) in such a way to prevent access from the vehicle itself ( MM) to the obstacle (SM), when the determination is made that the override state is established, based on detection by the override state detector (8C), the control suppressor (8Ba) suppresses a quantity of control by the override controller obstacle access prevention (8B) compared to when the determination is not made that the overtaking status is established, in order to suppress the obstacle access prevention control, the vehicle driving assistant additionally comprises:
an obstacle detector ahead (23) to detect the obstacle present in a direction in front of the vehicle itself (MM), and a calculator (S1057) of the obstacle reach time to calculate an obstacle reach time (TTC) by vehicle (MM) to reach the obstacle ahead detected by the obstacle detector ahead (23), as the obstacle reach time (TTC) calculated by the obstacle reach time calculator (S1057) is shorter, the suppressor (8Ba) control adjusts a greater amount of suppression of the amount of control of the obstacle access prevention control, and the future position is a surveillance point ahead which is a future position of the vehicle itself after a surveillance time ahead , and the time to reach the obstacle is a time to reach the surveillance point ahead.
[6]
6. Vehicle driving assistant, according to claim 1, CHARACTERIZED by the fact that
Petition 870190076710, of 08/08/2019, p. 67/86
3/5 the obstacle access prevention controller (8B) controls the vehicle itself (MM) in such a way as to prevent the vehicle itself (MM) from accessing the obstacle (SM) when the determination is made that the status of Override is established, based on detection by the overrun status detector (8C), the control suppressor (8Ba) suppresses a quantity of control by the obstacle access prevention controller (8B) compared to when the determination is not made that the overtaking state is established, in order to suppress the preventive access control to the obstacle, the vehicle driving assistant additionally comprises:
a melting point detector (13) to detect a melting point (300) in a forward direction of the vehicle's own travel path (MM), and a melting point reach time calculator (S1058) for calculate a melting point reach time (Tg) by the vehicle itself (MM) to reach the melting point (300) detected by the melting point detector (13), and how the melting point reach time (Tg ) calculated by the calculator (S1058) the melting point reach time is shorter, the control suppressor (8Ba) adjusts a greater amount of suppression of the control amount of the obstacle access prevention control, and the future position is the melting point in the forward direction.
[7]
7. Vehicle driving assistant, according to claim 1, CHARACTERIZED by the fact that it additionally comprises:
a future position estimator (8A) to estimate a future position (150) which is a position of the vehicle itself (MM) after a certain time (Tt), in which the obstacle access prevention controller (8B) determines a start of the prevention control of access to the obstacle based on the future position (150) of the vehicle itself (MM) after a certain time (Tt) estimated by the future position estimator (8A), and when the determination is made that the overtaking status It is established, based on detection by the overrun status detector (8C), the control suppressor (8Ba) suppresses the beginning of the obstacle access prevention control by the obstacle access prevention controller (8B) and also suppresses an amount of control by the obstacle access prevention controller (8B) compared to when the determination is not made that the overtaking state is established, to thereby suppress access prevention control the obstacle.
[8]
8. Vehicle driving assistant according to any one of claims 1 to 7, CHARACTERIZED by the fact that it additionally comprises:
Petition 870190076710, of 08/08/2019, p. 68/86
4/5 a change intention detector (8D) to detect whether or not a driver has an intention to change the route, in which, when the determination is made that the overtaking state is established, based on the detection by the detector overtaking state (8C), and the intention to change the route is detected by the change intention detector (8D), the control suppressor (8BA) suppresses the obstacle access prevention control.
[9]
9. Vehicle driving assistant, according to claim 8, CHARACTERIZED by the fact that, based on a change in a yaw moment or a change in an acceleration that is caused to the vehicle itself (MM), the detector ( 8D) intent to change detects whether or not the intention to change the route is present.
[10]
10. Vehicle driving assistant, according to claim 8, CHARACTERIZED by the fact that, based on a movement of the vehicle itself (MM) in relation to a route marker (200), the change intention detector ( 8D) detect whether or not the intention to change the route is present.
[11]
11. Vehicle driving assistant, according to claim 8, CHARACTERIZED by the fact that, based on a relative speed in a lateral direction of the vehicle itself (MM) with respect to the obstacle (SM), the detector (8D) change intent detects whether or not the route change intent is present.
[12]
12. Vehicle driving assistant according to any one of claims 1 to 11, CHARACTERIZED by the fact that it additionally comprises:
a change intent accuracy determiner (601a through 601d) to determine a driver's change intent accuracy, where, when the change intent accuracy determined by the change intent accuracy determiner (601a up to 601d) is high, suppression by the control suppressor (8Ba) is made stronger than when the accuracy of the intention to change the route is low.
[13]
13. Vehicle driving assistant, according to claim 12, CHARACTERIZED by the fact that the accuracy of the intention to change the route is determined by at least one of a direction indicator state, a steering angle (δ) , an angular steering speed (D δ), and a conductor acceleration operation.
[14]
14. Vehicle driving assistant according to any one of claims 1 to 13, CHARACTERIZED by the fact that the obstacle access prevention control by the obstacle access prevention controller (8B) implements at least one cause-causing processing vehicle itself (MM) a turning moment in a
Petition 870190076710, of 08/08/2019, p. 69/86
5/5 direction away from the obstacle (SM) and alerts the driver that the vehicle itself (MM) is accessing the obstacle (SM).

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法律状态:
2019-01-15| B06F| Objections, documents and/or translations needed after an examination request according [chapter 6.6 patent gazette]|

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2019-02-26| B06T| Formal requirements before examination [chapter 6.20 patent gazette]|

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2019-06-04| B06A| Patent application procedure suspended [chapter 6.1 patent gazette]|

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2019-08-27| B09A| Decision: intention to grant [chapter 9.1 patent gazette]|

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2019-10-01| B16A| Patent or certificate of addition of invention granted [chapter 16.1 patent gazette]|Free format text: PRAZO DE VALIDADE: 20 (VINTE) ANOS CONTADOS A PARTIR DE 15/07/2010, OBSERVADAS AS CONDICOES LEGAIS. (CO) 20 (VINTE) ANOS CONTADOS A PARTIR DE 15/07/2010, OBSERVADAS AS CONDICOES LEGAIS |

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