device and control method for hybrid vehicle

专利摘要:
APPARATUS AND CONTROL METHOD FOR HYBRID VEHICLE An apparatus and method of control for controlling a hybrid vehicle are arranged to prohibit shock and to minimize adverse influence on fuel consumption and delay when one of a start/stop control of an engine mechanism and a Shift control of one automatic transmission is requested while the other control is taking place. The control apparatus includes an engine mechanism, an engine/generator, a first clutch, an automatic transmission, an integrated controller, an automatic transmission controller and a coordinating engine/transmission mechanism control section. When a second control request is generated during the first control, the control section of coordinating engine/transmission mechanism initiates the second control at a request time when a condition does not exist such that a shock does not exceed an acceptable level and starts the second control at a later time when the condition exists such that the shock would exceed the acceptable level if the second control were initiated at the time of demand.
公开号:BR112013001547B1
申请号:R112013001547-0
申请日:2011-07-19
公开日:2021-07-06
发明作者:Kaori Tanishima；Hiroaki Kawamura
申请人:Nissan Motor Co., Ltd.；
IPC主号:

专利说明:

Cross reference to related orders
This application claims priority from Japanese patent application 2010-164194, filed July 21, 2010, which is incorporated herein in its entirety by reference. technical field
The present invention relates to control apparatus for a hybrid vehicle having an engine mechanism, an engine and an automatic transmission in a drive system and a method of controlling such a vehicle. Background
A control system for a prior technology hybrid vehicle is arranged to perform an engine engine start control and a gearshift control separately to prohibit shock because of simultaneous execution of engine engine start control and gear control. gear change. In this way, if the engine engine start control is started first, the shift control is initiated after the engine engine start control is finished. If shift control is initiated first, engine engine start control is initiated after shift control is completed. A control system like this is described in Japanese unexamined patent application H10-2241, for example. summary
In a control system such as this, engine engine start control and gearshift control in general are performed exclusively even in the situation in which the simultaneous execution of engine engine start control and gearshift control is not problematic. Therefore, when engine start is delayed and gearshift control is initiated first, the control device gives the driver a delay impression of an increase in drive force. Also, the driver tends to depress the accelerator pedal more deeply since the actuation force is not increased. Therefore, further depression of the accelerator pedal causes an abrupt increase in actuation force, and a shock impression at the moment of an initiation of the engine start control. In this way, exclusive execution of engine start control and gearshift control has an adverse influence on retarding and fuel consumption and, furthermore, the driver becomes unable to control the drive force properly.
In contrast, embodiments of the present invention provide control apparatus and/or control method for a hybrid vehicle that can prohibit a crash and minimize influence on delay and fuel consumption when a control request for one control is generated during a control of the other. with respect to the engine start/stop control of the engine mechanism and the shift control of the automatic transmission.
To achieve this objective, a control apparatus for controlling a hybrid vehicle comprises an engine mechanism, an engine, a mode selection device, an automatic transmission, an integrated controller and an automatic transmission controller. The motor is provided in a drive system extending from the motor mechanism to a sprocket and is arranged to start the motor mechanism and drive the sprocket. The mode selection device is provided between the engine mechanism and the engine and is arranged to change a vehicle drive mode between a hybrid drive mode using the engine mechanism and the engine as a drive source and an electric drive mode using the motor as the drive source. The automatic transmission is arranged between the engine and the drive wheel and is arranged to have a plurality of gear positions of different speed ratios. The integrated controller performs a motor-engine start/stop control, the motor-engine start/stop control being a motor-mechanism start control in response to a start request at the time of switching from mode to mode. hybrid drive or a motor mechanism stop control in response to a stop request at the time of mode change to electric drive mode. The automatic transmission controller performs a shift control of changing the automatic transmission gear position from a current position to a demand position in response to a shift request while the vehicle is moving. The integrated controller receives during a first control, which is one of the engine engine start/stop control of the engine engine and the shift control of the automatic transmission, a control request to a second control, which is the the other is the engine start/stop control and the shift control. When a shock will not exceed an acceptable level if the second control is initiated at a time of the second control's control request during the first control, the integrated controller initiates the second control at the time of the request. When the shock will exceed the acceptable level if the second control is started at the time of request, the integrated controller waits and starts the second control at the time of permission.
Therefore, in the situation where the shock is not a problem, even if the engine start control and gearshift control are performed simultaneously, the control system initiates the second control responsively at the time of the control request for the second control if the second control request is generated during the first control. Furthermore, in the situation in which the shock is problematic if the motor mechanism start control and the gearshift control are performed simultaneously, the control apparatus waits until such time as allowing the second control when the second control request is generated during the first control and then starts the shift control.
Thus, in the situation where shock is not an issue, the control system processes engine start control and shift control simultaneously with high responsiveness without a delay. In the situation where the shock is problematic, the control device processes the motor mechanism start control and gearshift control simultaneously after a minimum period to delay a start of control until the moment of transition to the situation where the shock is not problematic. Therefore, when one control is called for over the other, the control apparatus can prohibit a shock and, in addition, restrict adverse influence to retarding and fuel consumption to a minimum level. Brief description of drawings
The description in this document refers to the accompanying drawings in which like reference numerals refer to like parts throughout the various views, and in which:
Figure 1 is a view showing an example of a hybrid vehicle in which a control apparatus according to embodiments of the invention can be applied;
Fig. 2 is a view showing an example of a shift chart of an automatic transmission of Fig. 1;
Figure 3 is a view showing an example of an EV-HEV selection graph according to a first embodiment;
Figure 4 is a frame view showing an example of the automatic transmission of Figure 1;
Fig. 5 is a view showing a coupling table representing the coupling state of each friction element of the gear positions in the automatic transmission of Fig. 1;
Fig. 6 is a control block diagram showing a control system of coordinating engine/transmission mechanism according to the first embodiment;
Fig. 7 is a flowchart showing co-ordinate engine/transmission engine control performed by the co-ordinate engine/transmission engine control system of Fig. 6 when a shift request is generated after a start control start;
Figure 8 is a flowchart showing the coordinate engine/transmission engine control performed by the coordinate engine/transmission engine control system of Figure 6 when a start request is generated after a shift control start;
Figure 9 is a selection table illustrating a method for selecting a second clutch from the friction elements of an automatic transmission;
Figure 10 is a view illustrating examples for prohibit gear shifting, prohibit starting, and allow starting at various times such as related to certain variables in a 1^2 gear lift;
Figure 11 is a graph of time showing characteristics of certain variables in a time course of total ban of starting gear lift;
Figure 12 is a time graph showing characteristics of certain variables in a gear shift pretreatment prohibition start time course;
Figure 13 is a time graph showing characteristics of certain variables in a torque phase start enable time course;
Fig. 14 is a nomogram showing rotational speed variation in automatic transmission AT in the course of torque phase start permission time of Fig. 13;
Fig. 15 is a time graph showing characteristics of certain variables in a shift inertia phase start enable time course; and
Figure 16 is a time graph showing characteristics of certain variables in a shift CL synchronization start prohibition time course. Detailed description of embodiments of the invention
Figure 1 shows a hybrid vehicle of a rear wheel drive type to which a control apparatus according to embodiments of the present invention can be applied. As shown in Figure 1, the drive system of an FR hybrid vehicle includes an ENG engine mechanism, an FW flywheel, a first CL1 clutch (mode selection device or mode change device), an MG engine/generator (engine), a second CL2 clutch, an AT automatic transmission, an IN transmission input shaft, an MO/P mechanical oil pump, an SO/P oil sub-pump, a PS drive shaft, a DF differential, one DSL left drive axle, one DSR right drive axle, one left rear wheel RL (drive wheel) and one right rear wheel RR (drive wheel). The vehicle additionally includes a left front FL wheel and a right front FR wheel.
The engine engine ENG can be a gasoline engine or a diesel engine and is controlled under engine engine control commands from an engine engine controller 1. With engine engine control commands, engine engine controller 1 performs a engine engine start control, an engine engine stop control, a throttle opening control, a fuel shut off control, etc. The motor-mechanism output shaft is provided with the FW flywheel.
The first CL1 clutch is a clutch provided between the ENG engine mechanism and the MG engine/generator. The first clutch CL1 is controlled between the coupling, half coupling (or slip coupling) and decoupling (or release) states with a first clutch control fluid pressure produced by a first clutch hydraulic unit 6 under a command of first clutch control from a first clutch controller 5. For example, the CL1 first clutch is a normally closed dry single plate clutch including a diaphragm spring to retain full engagement with its elastic force. The first CL1 clutch uses a hydraulic actuator 14 which includes a piston 14a arranged to perform stroke control between full engagement, slip engagement and full de-engagement. The first CL1 clutch is engaged when oil pressure is not supplied.
The MG motor/generator is a synchronous type motor/generator including a rotor provided with built-in permanent magnet(s) and a stator provided with a nearby stator coil winding. Under control command from a motor controller 2, the MG motor/generator is controlled by applying three-phase alternating current produced by an inverter 3. The MG motor/generator can function as a driven motor when receiving the power supply. of a battery 4 (called power operation) and function as a generator to generate an electromotive force through the stator coil and charge battery 4 where the rotor receives rotational energy from the ENG motor mechanism or drive wheels (regeneration) . The MG motor/generator rotor is connected to the IN transmission input shaft of the AT automatic transmission.
The second CL2 clutch is a clutch provided between the MG engine/generator and the left and right rear wheels RL, RR. The second CL2 clutch is controlled between the engagement, slip engagement and de-engagement (or release) states with a control fluid pressure produced by a second clutch hydraulic unit 8 under a second clutch control command from a controller 7. For example, the second CL2 clutch is a normally open wet multi-plate clutch or multi-plate wet brake that is disengaged when oil pressure is not supplied and is provided with a proportional solenoid capable of controlling the rate. of oil flow and fluid pressure continuously. In this example, the first clutch hydraulic unit 6 and the second clutch hydraulic unit 8 are arranged on a CVU fluid pressure control valve unit attached to the automatic transmission AT.
The AT automatic transmission is a multi-speed (or stage AT) transmission capable of changing gear ratios automatically between a plurality of gears according to vehicle speed and degree of throttle opening. In the illustrated example of the first mode, the AT automatic transmission is a staged transmission having 7 forward speeds and 1 reverse speed. In this example, the second CL2 clutch is not a special independent clutch added specifically to the AT automatic transmission. Instead the second CL2 clutch is a clutch selected from friction coupling elements (clutch(s) and/or brake(s)) which are selectively coupled to achieve one of the speeds. Among the friction coupling elements, one satisfying a predetermined condition is selected and used as the second CL2 clutch.
The mechanical oil pump M-O/P is provided on the IN transmission input shaft (also called the motor shaft) of the AT automatic transmission and is arranged to be driven by the IN transmission input shaft. The SO/P oil sub-pump is a pump driven by an electric motor to prohibit a fluid pressure from decreasing when the discharge pressure of the MO/P mechanical pump becomes insufficient because of vehicle standstill or for some other reason . The S-O/P oil subpump is supplied in an engine housing or the like in this example. The drive of the S-O/P oil subpump is controlled by the automatic transmission controller 7 as mentioned later.
The PS drive shaft is connected to the AT automatic transmission transmission output shaft. The PS drive shaft is also connected to the left and right rear wheels RL and RR via the DF differential and the left and right drive shafts DSL and DSR.
This FR hybrid vehicle has as drive modes an electric vehicle mode (hereinafter referred to as EV mode), a hybrid vehicle mode (hereinafter referred to as HEV mode) and a drive torque control mode (hereinafter referred to as EV mode). then as WSC mode).
EV mode is a mode in which the first CL1 clutch is disengaged, and the vehicle is driven only by the MG engine/generator drive force. The EV mode includes a motor drive mode and a regenerative drive mode. EV mode is selected when the pull trigger force (ie, pull trigger torque) is low and the battery SOC is assured.
HEV mode is a mode in which the first clutch CL1 is engaged, and the vehicle is engaged in the engaged state of the first clutch CL1. The HEV mode includes an engine assist drive mode, a power generation drive mode, and an engine drive drive mode. The vehicle is operated in one of these modes. HEV mode is selected when the request trigger force is high or when the battery SOC is insufficient.
WSC mode (drive torque control mode) is a mode to drive the vehicle by holding the second clutch CL2 in slip clutch state by controlling the rotational speed of the MG motor/generator and thus controlling the clutch torque capacity in order to match the clutch transmission torque through the second CL2 clutch with the demand drive torque determined by the vehicle operating condition and the driver's operation. WSC mode is selected in a drive region in which the engine engine rotation speed becomes less than an idle rotation speed such as in a situation where the vehicle is stopped, started or decelerated when in HEV mode.
An FR hybrid vehicle control system is configured as explained below. As shown in Figure 1, the FR hybrid vehicle control system according to the first embodiment includes the motor mechanism controller 1, the motor controller 2, the inverter 3, the battery 4, the first clutch controller 5 , the first clutch hydraulic unit 6, the automatic transmission controller 7, the second clutch hydraulic unit 8, the brake controller 9 and the integrated controller 10. The integrated controller 10 is connected to controllers 1, 2, 5, 7 and 9 through a CAN 11 communication line enabling information exchange.
The integrated controller 10 and the other controllers described in this document generally consist of a respective microcomputer including central processing unit (CPU), input and output (I/O) ports receiving certain data described in this document, access memory random (RAM), persistent memory (KAM), a common data bus, and read-only memory (ROM) as an electronic storage medium for executable programs and certain stored values as discussed in this document. The functional (or processing) units of the integrated controller 10 described in this document (and other controllers where appropriate) can be, for example, implemented in software such as executable programs, or can be implemented in whole or in parts by means of separate hardware in the form of one or more integrated circuits (IC). Integrated controller 10 may be an engine control unit (ECU) as known in the programmed art as described herein. Other controllers described in this document may be similarly structured. Also, although multiple controllers are shown, fewer or more are possible.
The motor-drive controller 1 receives the motor-drive rotational speed from a motor-drive rotational speed sensor 12, a target motor-drive torque command from the integrated controller 10, and other required information. Then, motor mechanism controller 1 delivers a command to control a motor mechanism operating point (Ne, Te) to a motor mechanism regulating valve actuator ENG, etc.
Motor controller 2 receives an MG motor/generator rotor rotational position detected by a resolver 13, target MG torque command and target MG rotational speed command from integrated controller 10, and other required information. Then, motor controller 2 delivers a command to inverter 3 to control a motor operating point (Nm, Tm) of the MG motor/generator. In addition, the engine controller 2 monitors the battery charge state (SOC) representing a charge capacity of the battery 4 and provides information regarding the battery SOC to the integrated controller 10 via the CAN 11 communication line.
The first clutch controller 5 receives a stroke position of the piston 14a of the hydraulic actuator 14 detected by a first clutch stroke sensor 15, target CL1 torque command from the integrated controller 10 and other required information. Then, the first clutch controller 5 delivers a command to the first clutch hydraulic unit 6 in the hydraulic control valve unit CVU to control the engagement, half-engagement or de-engagement state of the first clutch CL1.
The automatic transmission controller 7 receives information from the throttle opening sensor 16, the vehicle speed sensor 17 and other sensors 18. During a vehicle shifting operation with the D (drive) range being selected, the transmission controller auto 7 determines an optimal speed ratio by checking an operating point position determined by the APO throttle opening degree and VSP vehicle speed on a shift chart shown, for example, in figure 2. 7 automatic transmission delivers a control command to the CVU hydraulic control valve unit to achieve the selected speed ratio. As shown in Figure 2, the shift chart includes upshift lines and downshift lines depending on APO throttle opening and VSP vehicle speed. In addition to this shift control, the automatic transmission controller 7 receives a target CL2 torque command from the integrated controller 10 and, in response, performs a second clutch control by sending a command to the second clutch hydraulic unit 8 on the hydraulic control valve unit CVU to control the slip coupling of the second CL2 clutch.
The brake controller 9 receives the four-wheel wheel speeds detected by the wheel speed sensors 19, the BS brake stroke detected by a brake stroke sensor 20, a regeneration coordinate control command from the integrated controller 10, and other required information. Then, the brake controller 9 performs a coordinate regeneration control to compensate for a deficit with a mechanical braking force (hydraulic braking force and/or engine braking force) when a regenerative braking force alone is insufficient to achieve a demand braking force determined by the BS brake stroke at the time of brake depression, for example.
The integrated controller 10 performs functions to manage the energy consumed by the vehicle as a whole and to drive the vehicle with a higher efficiency. The integrated controller 10 receives information required from an engine rotational speed sensor 21 to detect an engine rotational speed Nm and from other sensors/switches 22, and information via the CAN communication line 11. Then, the integrated controller 10 delivers a target engine torque command to engine engine controller 1, a target MG torque command and target MG speed command to engine controller 2, a target CL1 torque command to first clutch controller 5 , a CL2 target torque command to the automatic transmission controller 7 and a regeneration coordinate control command to the brake controller 9.
The integrated controller 10 includes a mode selection section to search for an optimal trigger mode according to the operating point position determined by the APO throttle opening degree and the VSP vehicle speed in an EV-HEV selection graph shown , for example, in Figure 3. The integrated controller 10 then selects the drive mode thus determined as a desired target drive mode. The EV-HEV selection graph includes an EV ^ HEV shift line for switching the trigger mode from “EV mode” to “HEV mode” in case of advancing the operating point (APO, VSP) through this region line EV, a HEV ^ EV change line for switching the drive mode from “HEV mode” to “EV mode” in the case of advancing the operating point (APO, VSP) through this line of the HEV region, and a line of HEV ^ WSC change to change the drive mode to “WSC mode” in case of entry of the operating point (APO, VSP) in the WSC region during HEV mode operation. The HEV ^ EV shift line and the EV ^ HEV shift line are arranged to provide a hysteresis as a boundary separating the EV region and the HEV region. The HEV^WSC shift line extends along a VSP1 established vehicle first speed line in which the engine engine ENG is held at a rotational speed of idle when the AT automatic transmission is in first gear. When the battery SOC becomes equal to or less than a predetermined value during selection of “EV mode”, the target trigger mode is forcefully switched to “HEV mode”.
Figure 4 is a structure view showing an example of the AT automatic transmission installed in the FR hybrid vehicle provided with the control system according to the first embodiment. The AT automatic transmission in this example is a staged automatic transmission having seven forward speeds and one reverse speed. A drive force obtained from a drive source including only the MG motor/generator or both of the MG motor/generator and the ENG motor mechanism is supplied to the IN (IN) transmission input shaft, the rotational speed is changed by means of four planetary gears and seven friction coupling elements, and output rotation is produced by the OUTPUT transmission output shaft.
The transmission gear mechanism includes a first GS1 gearset including a G1 first planetary gear and a G2 second planetary gear, and a GS2 second gearset including a G3 third planetary gear and a G4 fourth planetary gear arranged in order on the geometric axis of the drive input shaft IN to output drive output shaft. The group of friction coupling elements includes first clutch C1 (or I/C input clutch), second clutch C2 (or direct D/C clutch), third clutch C3, first B1 brake, second B2 brake , the third brake B3 and the fourth brake B4. The first one-way clutch F1 and the second one-way clutch F2 are additionally provided.
The G1 first planetary gear is a single pinion type planetary gear including the first sun gear S1, the first ring gear R1, the first pinions P1 and the first loader PC1. The second planetary gear G2 is a single pinion type planetary gear including the second sun gear S2, the second ring gear R2, the second pinions P2 and the second charger PC2. The G3 third planetary gear is a single pinion type planetary gear including the S3 sun gear, the R3 ring gear, the P3 third pinions and the PC3 third charger. The fourth planetary gear G4 is a single pinion planetary gear including the fourth sun gear S4, the fourth annular gear R4, the fourth pinions P4 and the fourth charger PC4.
The INPUT transmission input shaft is connected to the second annular gear R2 (connection line is omitted in figure 4) and is adapted to receive the rotational drive force of at least one of the ENG engine mechanism and the MG engine/generator. The OUTPUT drive output shaft is connected to the third PC3 loader and is arranged to deliver an output rotational drive force through the final gear to the drive wheel (left and right rear wheels RL, RR).
A first connecting element M1 connects the first ring gear R1, the second charger PC2 and the fourth ring gear R4 together so that they rotate as a unit. A second connecting element M2 connects the third ring gear R3 and the fourth charger PC4 together so that they rotate as a unit. A third rotating element M3 connects the first sun gear S1 and the second sun gear S2 together so that they rotate as a unit.
The first clutch C1 is a clutch for selectively creating and breaking a connection between the INPUT drive input shaft and the second connecting element M2. The second clutch C2 is a clutch to selectively create and break a connection between the fourth sun gear S4 and the fourth charger PC4. The third C3 clutch (or H&LR H&LR/C clutch) is a clutch to selectively create and break a connection between the third sun gear S3 and the fourth sun gear S4. The second unidirectional clutch F2 (or unidirectional 1&2 1&2OWC speeds clutch) is disposed between the third sun gear S3 and the fourth sun gear S4. The first B1 brake (or Fr/B front brake) is a brake to selectively hold the first PC1 loader not rotating in a BOX gearbox. The first unidirectional clutch F1 (or unidirectional 1stOWC first speed clutch) is arranged in parallel with the first brake B1. The second B2 brake (or LOW/B lower brake) is a brake to selectively hold the third sun gear S3 not rotating in the BOX gearbox. The third B3 brake (or 2346 2346/B brake) is a brake for selectively retaining the third rotating element M3, connecting the first and second sun gears S1 and S2, not rotating in the BOX gearbox. The fourth B4 brake (or R/B reversing brake) is a brake to selectively hold the fourth PC4 charger not rotating in the BOX gearbox.
Figure 5 shows a coupling table showing the coupling states of the friction coupling elements at each speed in the AT automatic transmission of figure 4 installed in the FR hybrid vehicle according to figure 1. In figure 5, a white circle indicates hydraulic coupling in actuated state, a white circle in parentheses indicates hydraulic coupling in neutral state (one-way clutch operation in actuated state), and no marks indicate disengagement.
The gear shifting mechanism thus constructed can achieve seven forward speeds and one reverse speed as mentioned below, by means of a gear shifting operation of uncoupled one element and coupling another element.
In “first gear”, only the second brake B2 is engaged and in this way the first and second one-way clutches F1 and F2 engage. In “second gear”, the second brake B2 and the third brake B3 are engaged, and the second one-way clutch F2 engages. In “third speed”, the second brake B2, the third brake B3 and the second clutch C2 are engaged, and the first and second one-way clutches F1 and F2 do not engage. In “fourth gear”, the third brake B3, the second clutch C2 and the third clutch C3 are engaged. In “fifth gear”, the first clutch C1, the second clutch C2 and the third clutch C3 are engaged. In “sixth gear”, the third brake B3, the first clutch C1 and the third clutch C3 are engaged. In “seventh gear”, the first brake B1, the first clutch C1 and the third clutch C3 are engaged, and the first unidirectional clutch F1 engages. In “reverse speed”, the fourth brake B4, the first brake B1 and the third clutch C3 are engaged.
Figure 6 is a control block diagram showing the integrated controller 10 and the automatic transmission controller 7 in accordance with the first embodiment configured to form an engine/transmission engine coordinate control system (or engine engine cooperation control system /shift) coordinating engine start control and shift control.
The engine/transmission mechanism coordinate system shown in Figure 6 is characterized by a gear-shift prohibit signal set by the integrated controller 10 having information regarding the engine control and delivered to the automatic transmission controller 7, and a signal to prohibit start established by the automatic transmission controller 7 having information regarding the shift control and delivered to the integrated controller 10. If, for example, the integrated controller 10 is arranged to establish both of the shift prohibit signaling and the start prohibit signaling, the integrated controller 10 must receive detailed information regarding the shift control from the automatic transmission controller 7. In contrast to this arrangement, the arrangement of figure 6 makes it possible to set the start prohibit signaling exactly without receiving detailed information about change control gear from the automatic transmission controller 7. As such, this setting is preferred but not required.
As shown in Figure 6, the integrated controller 10 includes a start mode determination section 10a, a system failure request determination section 10b, a start request signal generation section 10c, a section Gearshift Prohibition Determination 10d (device to establish gearshift prohibit signaling), a motor mechanism stop prohibitory determination section 10e and a motor mechanism start prohibition determination section 10f.
The start mode selection section 10a selects one of a normal start and a neutral start and delivers the selection result to the motor mechanism start prohibition determination section 10f. The system fault request determination section 10b determines a failsafe request and a component protection request and delivers the results of the determination to the motor mechanism start prohibition determination section 10f. The start request signaling generating section 10c generates a motor mechanism start request signaling and delivers it to a start control section 71 of the automatic transmission controller 7 discussed below. The shift prohibiting determination section 10d (device to establish shift prohibit signaling) establishes the shift prohibit signaling and delivery to a shift control section 72 of the automatic transmission controller 7 discussed. then. The stop prohibition determination section 10e determines motor mechanism stop prohibition. The motor mechanism start prohibiting determining section 10f receives the start prohibit signaling from a start prohibit signal generating section 71a (also called the start prohibit signaling setting section) from the start control section 71, the result of the selection of the starting mode determination section 10a, and the results of the determination of the system failure request determination section 10b. In response, the motor engine start prohibition determination section 10e determines the motor mechanism start prohibition including priorities of the motor mechanism start prohibition conditions. The priorities (or degrees of priority) are: 1 failsafe, 2 component protection, 3 run request, and 4 fuel consumption • exhaust emission request. Information regarding priorities 1 and 2 is obtained from the system failure request determining section 10b, and information regarding priorities 3 and 4 is obtained by the start prohibit signaling from the start prohibit signaling generating section 71a.
As shown in Figure 6, the automatic transmission controller 7 includes the start control section 71 and the shift control section 72. The start control section 71 includes the start prohibit signal generating section 71a , an intention to change prohibition section during start control + LIFT 71b, a raise and lower prohibition section during start control 71c and a CL2 element selection section 71d. The shift control section 72 includes a shift intent prohibition section 72a.
The start prohibit signal generation section 71a receives a shift type, an existence or non-existence of manual mode (M mode), shift phase (coupling side), shift phase (decoupling side) ) and trigger/neutral determination information. Then, the start prohibit signal generating section 71a generates the start prohibit signal (zero: allow, 1: prohibit) and sends the start prohibit signal to the motor mechanism start prohibit determination section 10f of the integrated controller 10. The shift phases are: (a) pre-treatment, (b) torque phase, (c) inertia phase, (d) CL synchronization phase and (e) post-treatment, and signaling of prohibit departure is established and clarified individually. The existence or non-existence of manual mode to perform up/down gear changes in the AT automatic transmission via a manual lever operation is obtained from an M mode determination section 23, which may be part of the integrated controller 10 or of the automatic transmission controller 7.
The CL2 element selection section 71d selects the CL2 element from the AT automatic transmission friction coupling elements based on a current gear position (CurGp) and a next gear position (NextGp). As shown, for example, in Figure 9, the element selection section of CL2 71d selects Low/B at first speed, Low/B at second speed, D/C at third speed, H/C at fourth speed, H /C at fifth speed, I/C at sixth speed and I/C at seventh speed. In the case of a gear raise (N^N+1), the element of CL2 is determined by N+1 after gear raise (NextGp), in order to treat as the speed start of N+1 and perform a Elevation rotation speed change simultaneously during start control. In the case of downshift (N ^ N-1), the element of CL2 is determined by N (CurGp) before downshift in order to treat it as the speed start of N and perform a speed start operation lower rotational. There is an exception in the case of a 3^2 downshift where the CL2 element is Low/B after downshift. This is because the torque sharing ratio is widely varied between second speed and third speed, and shock sensitivity is better when tuning in second speed.
Figure 7 is a flowchart showing a control process of coordinating engine/transmission engine (or engine/gearshift cooperation process) in the case of a shift request generated after a start of starter control.
At step S11 an integrated controller 10 motor/drive mechanism coordinate control system initiates motor mechanism start control in response to a motor mechanism start request ENG.
In the next step S12 the control system determines whether or not there is a gear change request. From step S12, processing proceeds to step S15 in the case of YES (there is a gear change request), and to step S13 in the case of NO (no gear change request).
Where the shift request is not generated as indicated by the response in step S12, motor mechanism start control is performed in step S13. In step S14 the control system determines whether the motor mechanism start control is completed or not. Where motor engine start control is complete (YES), processing ends. Where engine start control is not yet complete (NO), the control system returns to step S12 to continue monitoring for a shift request and a shift prohibit signal.
Conversely, after the evaluation in step S12 that the shift request is present, the control system determines whether the gear shift prohibit signal is equal to one (prohibit) or not in step S15. From step S15 the control system proceeds to step S16 in the case of YES (shift prohibit signal = 1) and to step S17 in the case of NO (shift prohibit signal = 0). The signal to prohibit gear change is set to one (prohibit) in the following cases. Otherwise, the signal to prohibit gear change is zero (allow).
First, the shift prohibit flag is set to one when the shift is to be performed during engine rotational speed control and gear ratio determination is infeasible on the shift control side. For example, the control system prohibits a gear raise during engine start in the full region. In addition, the control system prohibits both upshifting and downshifting during WSC mode in the full region.
Second, the shift prohibit signal is set to one when the shift is a shift with the throttle opening being held substantially constant and the driver's demand to reduce shock is high. For example, the control system prohibits downshifting on activation with the throttle being held constant during engine starting operation. However, the control system establishes a prohibition region depending on the throttle opening condition.
Third, the gear-shift prohibit flag is set to one when the gear-shift is a gear shift in which control over the transmission input torque is difficult and the possibility of having an influence on the shock is high. For example, the control system prohibits both an upshift and a downshift in engine engine start operating time in the neutral state in the full region. The control system prohibits both an upshift and a downshift in the full region at the time of a recovery start (starting the engine mechanism without causing the second CL2 clutch to slip, which would otherwise be driven to absorb associated shock).
When the shift prohibit signal equals 1, as indicated in step S15, the control system determines whether the shift request is either a fault-free request or a component protection request. te in step S16. When the shift request is neither a fault-free request nor a component protection request (NOT in step S16), processing reverts to step S15 to continue monitoring the status of the shift prohibit signal. Where the shift request is a fault free request or a component protection request (SIM in step S16), processing advances to step S17.
In step S17 the control system starts the gearshift control after the evaluation in step S15 that the signal to prohibit gearshift is equal to zero or the evaluation in step S16 that the gearshift request is a request fault-free or a component protection request. In the next step S18 the control system performs simultaneous operation of engine start control and shift control, and then processing advances to step S19.
In step S19 the control system determines whether both engine start control and shift control are complete. If engine engine start control and shift control are completed (YES in step S19 indicating end of shift/start control), processing is complete. If not (NO), processing returns to step S18 to continue simultaneous operation of engine start control and shift control.
Figure 8 is a flowchart showing the control process of coordinating engine/transmission mechanism (or engine/gearshift cooperation process) in the case of a start request after a shift control start.
In step S21 the control system initiates a shift control in response to a shift request.
Next, in step S22, the control system determines whether or not there is a motor mechanism start request. From step S22 the control system proceeds to step S25 in the case of YES (motor engine start request is present) and to step S23 in case of NO (motor engine start request is absent).
Where the motor mechanism start request is absent, as indicated by the response in step S22, the shift control is performed in step S23. In step S24 the control system determines whether the shift control is completed or not. Where shift control is complete (YES), processing ends. Where shift control is not yet complete (NO), the control system returns to step S22 to continue monitoring for an engine engine start request and a start prohibit signal.
On the contrary, after the evaluation in step S22 that the motor mechanism start request is present, the control system determines whether the start prohibit signal is equal to one (prohibit) or not in step S25. From step S25 the control system proceeds to step S26 in the case of YES (start prohibit flag = 1) and to step S27 in the case of NO (start prohibit flag = 0). The start prohibit flag is set to one (deny) in the following cases, and otherwise the start prohibit flag is equal to zero (allow).
First, the start prohibit signal is set to one when the AT transmission is in a shift phase in which the second clutch CL2 (slip clutch) cannot maintain its slip because of balance of capabilities between the second clutch CL2 (slip clutch) controlled in the slip state on the engine engine start control and the shift clutch participating in the shift. For example, the control system prohibits starting the engine mechanism during pretreatment at a 1^2 gear lift.
Second, the start prohibit signaling is set to one when the AT transmission is in a shift operation in which the gear shift engagement clutch is the same as the second clutch CL2 controlled in slip state on the engine start control engine when engine engine start control is performed. For example, the control system prohibits starting the engine mechanism during a 2^3 gear lift and during a 3^4 gear lift.
Third, the start prohibit signaling is set to one when the AT transmission is in a shift operation using one-way clutch(s). For example, the control system prohibits starting the engine mechanism during a 3^2 downshift and during a 2^1 downshift.
Fourth, the start prohibit signaling is set to one when the AT transmission is in a shift phase region in which engine rotational speed control is performed on shift. For example, the control system prohibits starting the engine mechanism in the region where the shift phase is in a CL synchronization phase.
When the start prohibit flag equals 1, as indicated in step S25, the control system determines whether the start request is either a fault-free request or a component protection request in step S26. When the start request is neither a fault-free request nor a component protection request (NOT in step S26), processing reverts to step S25 to continue monitoring the status of the prohibit start signal. Where the start request is a fault-free request or a component protection request (SIM in step S26), processing proceeds to step S27.
It should be noted that the control system repeats the determination of step S25 during the execution of the gearshift control and ensures the execution of the start control at the point of time at which the prohibit start signal is re-established, even during the shift control of march.
In step S27 the control system starts motor mechanism start control after the evaluation in step S25 that the start prohibit signal is equal to zero, or the evaluation in step S26 that the start request is a request free of failure or a request for component protection. In the next step S28 the control system performs simultaneous operation of engine start control and shift control, and then processing advances to step S29.
In step S29 the control system determines whether both engine start control and shift control are complete. If start/shift control is complete (YES in step S29), processing is complete. If not (NO), processing returns to step S28 to continue simultaneous operation of engine start control and shift control.
FR hybrid vehicle control apparatus operations according to the first modality are divided for explanation into three parts: 1) control operation of coordinating engine/transmission mechanism in case of a gear change request after a start of start control , 2) control operation of coordinating engine/transmission mechanism in the event of a start request after a shift control start, and 3) operation in examples at a 1^2 gear lift. 1) Control operation of coordinating engine/transmission mechanism in the event of a request to change gear after a start of starter control.
Referring to Figure 7, when the gear change request is generated during engine start control, and the gear change prohibit signal is equal to 0 (allow), the control system follows a course of S11 ^ S12 ^ S15 ^ S17. Thus, the control system initiates the shift control at the moment of the shift request. Then, from S17, the control system proceeds to a stroke of S18^S19, repeatedly performing engine start control and shift control simultaneously. The control system then completes the coordinate start/shift control when step S19 indicates that the start/shift control is complete. The control system repeats the determination of step S15 during the execution of the start control, and ensures the execution of the gearshift control at the point of time at which the signal to prohibit gearshift is re-established, even during the start control.
When the gear change request is generated during engine engine start control, the gear change prohibit signal is equal to one (prohibit), and the gear change request is neither a fail-safe request nor a component protection request, then the control system follows a control flow in the flowchart of figure 7 of S11^S12^S15^S16 and repeats the flow of S15^S16 as long as the shift prohibit signal is equal to one . When the shift prohibit signal is reset to zero, the control system proceeds from S15 to S17, and initiates shift control at the time of signal reset. From step S17 the control system proceeds to a stream of S18^S19, repeatedly executing the simultaneous processing operation of engine start control and shift control. The control system then terminates the coordinate start/shift control in response to an affirmative response in step S19 that the start/shift control is complete.
Therefore, in the situation in which shock is not problematic (shift prohibit signal = 0) even if engine start control and shift control are performed simultaneously, the control system initiates the shift control responsively at the time of the shift request if the shift request is generated during engine start control. In addition, in the situation where the shock is problematic (forbid gear shift signal = 1) if the motor mechanism start control and gear shift control are performed simultaneously, the control system waits until the moment allowing control shift time (the signal reset time) when the shift request is generated during engine start control, and then initiates the shift control. That is, the control system repeats the determination of step S15 during the start control, and ensures the initiation of the gear change control at the time of the signal to prohibit gear change being clarified, even during the motor mechanism start control .
As described, in the situation where shock is not a problem, the control system processes engine start control and shift control simultaneously with a high responsiveness without a delay in starting the shift control. In the situation where shock is problematic, the control system processes engine start control and shift control simultaneously after a minimum period to delay the start of shift control until the shock is not problematic during the running period of the starter control. Therefore, when the gear change request is generated during engine start control, the control system can prevent a shock and furthermore restrict adverse influence to retarding and fuel consumption to a minimum level. Thus, the control system can prioritize the prevention of shock during the engine start control execution period, while reducing the adverse influence on fuel consumption and retarding.
Motor mechanism start control is performed under the command of the integrated controller 10 in the mode indicated below. When the APO throttle opening degree exceeds an engine engine start line during shift operation in EV mode, then an engine engine start request is generated. Engine start control is initiated in response to the engine engine start request. In engine start control, the control system first controls the torque capacity of the second CL2 clutch in order to cause the second CL2 clutch to slip into a half clutch state. Then, after confirmation of the start of slippage of the second CL2 clutch, the control system initiates coupling of the first CL1 clutch and increases the rotational speed of the motor mechanism by means of a start operation with the MG motor/generator serving as a starter motor . Then, the control system starts the engine engine ENG combustion operation when engine engine rotational speed reaches an engine engine speed level allowing the first explosion and engages the first clutch CL1 fully when engine speed and engine speed. motor mechanism become close to each other. The control system then changes the drive mode to HEV mode by locking the second CL2 clutch.
The shift control is performed under the command of the automatic transmission controller 7, independent of the engine starting control, in the mode indicated below. When, during travel state, the operating point (VSP, APO) crosses the upshift or downshift line in the shift chart shown in figure 2, a shift request is generated. Shift control is initiated in response to this shift request. In gearshift control, a basic operation is performed by means of a replacement fluid pressure control that decouples one friction element from the coupled state to the uncoupled state and couples another friction element from the uncoupled state to the coupled state . The gearshift operation is completed by means of pretreatment control → torque phase control → inertia phase control → CL synchronization phase control → after treatment control. In this case, the control system controls these shift sections or periods from the start of the shift to the end of the shift individually. The control system performs this individual control by using various information such as time controller information and information regarding gear ratio variation calculated from the AT transmission input and output speeds, and thus monitoring the degree of progress of the gear shift operation.
The signal to prohibit gear change is established in the mode shown below in the first mode.
The shift prohibit flag is set to one (prohibit) during engine speed control of the engine start control such that it is not possible to determine the gear ratio on the shift control side. Specifically, CL2 second clutch slip control is performed by engine speed control during engine engine start control and during WSC mode. If, in this case, the shift control is initiated, the shift control side is unable to monitor the progress of the shift operation and is unable to grasp the engaged/uncoupled state of the clutch. In this way, changing gears can produce a big shock. Therefore, a gear lift is prohibited in the full slip control region. In WSC mode, upshift and downshift are both prohibited in the full slip control region. In this way, the control system can prevent gear shift shock because of the initiation of shift control during engine start control in shift operation in which the control system is unable to ascertain the decoupling state / clutch coupling. Downshifting during engine starting operation is mainly originated from a throttle compression operation by the driver. Therefore, in the case of downshifting during engine start operation, the signal to prohibit shifting is set to zero (allow) in order to give importance to a driver's ability to control the drive force and eliminate delay .
In the first mode, the gear shift prohibit signal is also set to one (forbid) during engine start control when the throttle is held constant and the driver's demand to reduce shock is high. During displacement operation with APO being constant, sensitivity to shock is greater as compared to sensitivity to delay. Therefore, in the case of downshifting with the throttle being held constant during engine starting operation, the control system prohibits shifting by prioritizing shock sensitivity over delay sensitivity. Thus, the control system can prevent gear shift shock because of shift control initiation during engine start control in the start situation where the driver's demand to reduce shock is high.
In the first mode, the signal to prohibit gear change is also set to one (prohibit) during motor start control when transmission input torque control is difficult and the possibility of influence on the shock is high. Specifically in neutral travel with the throttle being released, and in a recovery start not using the CL2 second clutch slip, the transmission input torque control is difficult and the possibility of shock becomes high if the control of gear shifting is involved during engine starting operation. Therefore, the control system prohibits both an upshift and downshift in the region of full neutral displacement and prohibits both an upshift and a downshift in the region of full recovery start. In this way, the control system can prevent gear shift shock caused by the involvement of the shift control during engine starting control in shifting situations where transmission input torque control is difficult. 2) Control operation of coordinating engine/transmission mechanism in the event of a start request after a shift control start.
Referring to figure 8, when the engine mechanism start request is generated during the shift control from a start to an end of the shift control, and the start prohibit signal is equal to 0 (allow) , the control system follows the course of S21^S22^S25^S27. Thus, the control system initiates motor-engine start control at the time of the motor-engine start request. Then, from S27, the control system proceeds through a course of S28^S29, repeatedly performing engine start control and shift control simultaneously. The control system then completes the coordinate start/shift control when step S29 indicates that the start/shift control is complete.
When the engine mechanism start request is generated during the shift control, the start prohibit signal is equal to one (prohibit), and the start request is neither a fail-safe request nor a protection request. component, then the control system follows a control flow in the flowchart of Fig. 8 of S21^S22^S25^S26 and repeats the flow of S25^S26 as long as the start prohibit flag is equal to one. When the start prohibit signal is reset to zero, the control system proceeds from S25 to S27, and initiates motor mechanism start control at the time of signal reset. From step S27 the control system proceeds to a stream of S28^S29, repeatedly executing the simultaneous processing operation of engine start control and shift control. The control system then terminates control of coordinate start/shift in response to an affirmative answer in step S29 that the start/shift control is complete.
Therefore, in the situation in which shock is not problematic (start prohibit flag = 0) even if the motor mechanism start control and gear shift control are performed simultaneously, the control system initiates the motor mechanism start control responsively at the time of the engine engine start request if the start request is generated during the shift control. Also, in the situation where the shock is problematic (start prohibit flag = 1) if the engine start control engine and shift control are performed simultaneously, the control system waits until the moment allowing engine engine start control (the timing of signal reset) when the engine engine start request is generated during shift control gear, and then initiates engine start control.
As described, in the situation where shock is not an issue, the control system processes the engine starting control and shift control simultaneously with a high responsiveness without a delay in initiating the engine starting control. In the situation where shock is problematic, the control system processes engine start control and shift control simultaneously after a minimum period to delay an engine start control start until shock is not problematic. Therefore, when the start request is generated during the shift control, the control system can prevent a shock and furthermore restrict adverse influence on retarding and fuel consumption to a minimum level. Thus, the control system can prioritize the prevention of shock during the shift control execution period, while reducing the adverse influence on retarding and fuel consumption.
The signal to prohibit departure is established in the mode shown below in the first mode.
The start prohibit flag is set to one (prohibit) during shift control where the second CL2 clutch cannot maintain its slip condition because of the balance of capabilities of the second CL2 clutch and the clutch involved in the shift. That is, involvement of the engine starting control in the shift control in the situation where the second CL2 clutch is unable to maintain the slip state can cause a large starting shock. For example, engine starting operation is prohibited during pretreatment at a 1^2 range raise. Thus, the control system can prevent starting shock from being caused by the involvement of the engine starting control in the shift control where the second CL2 clutch is unable to maintain its slip state.
In the first mode, the start prohibit signal is also set to one (prohibit) during a gear shift operation in which the second clutch CL2 and the clutch to be engaged in the gear shift are one and the same. Specifically, if the clutch clutch in the gear shift is the same as the second CL2 clutch slipped in the engine start control, it is not possible to use forced slip, and there is a possibility of large starting shock. In this example, the control system prohibits engine start control during a 2^3 shift raise and a 3^4 shift raise, which are gear shifts satisfying this condition. Thus, the control system can prevent shock starting in the situation where the coupling clutch is the same second clutch CL2 slipped in the motor mechanism starting control.
In the first mode, the start prohibit signal is also set to one (forbid) during a gear change using a one-way clutch. There is a possibility of shock shock from a one-way clutch if motor mechanism start control occurs during a gear shift using this one-way clutch. In this case, engine start control is prohibited during a 3^2 downshift and a 2^1 downshift, which satisfy this condition. Therefore, the control system can prevent shock shock because of initiation of engine start control during shift control using one or more one-way clutches.
In the first mode, the start prohibit signal is also set to one (prohibit) in a shift phase region where engine rotational speed control is performed while the second clutch CL2 is engaged. (See figure 16). Specifically, the system may erroneously evaluate a slip state of the second CL2 clutch and allow engagement of the first CL1 clutch if the engine engine start control is initiated on a gear change using engine rotation speed control, resulting in an impression of shock. This is because the engine engine start control monitors input speed (as detected by MG engine/generator resolver 13) and output speed (as detected by vehicle speed sensor 17) to control second clutch slip CL2 and subsequent engagement of the first CL1 clutch upon a motor mechanism start request. The control system can judge, based on the gear change ratio (vehicle speed/MG revolutions), that the second clutch CL2 would be slipped sufficiently so that the first clutch CL1 could be engaged to receive engine torque. As Figure 16 illustrates, it is another clutch (2346/B) that is under timing control for shift control, not the second CL2 clutch. Therefore, a false assessment would take place. Therefore, motor mechanism start control is prohibited in a CL synchronization phase satisfying this condition. In this way, the control system can prevent a shock impression caused by the initiation of engine start control in gear shift control where engine rotational speed control is performed. 3) Operation on examples at a 1^2 gear lift.
Figure 10 illustrates examples of preset setting of shift prohibition, start prohibition and start permit at moments (1) to (5) in relation to a NEXTGP_MAP gear shift command gear ratio (shown by line dashed), a NEXTGP control gear ratio (dashed line and two dots), a CURGP current gear ratio (solid line), and input rotational speed in the case of a 1^2 gear lift. The NEXTGP_MAP ratio is a ratio of shift command gears produced when the operating point crosses a shift line in the shift chart shown in figure 2. The NEXTGP ratio is a ratio of control gears produced when each control shifts. gearshift is determined and gearshift control is initiated. The CURGP ratio is a ratio of actual gears produced at one end of each shift control.
With respect to the moments, moment (1) is one in the course of the total prohibition of starting gear lift which prohibits a gear lift during the entire motor mechanism starting control. The moment (2) is one in the gearshift pretreatment start prohibition time course that prohibits a motor mechanism start during a shift pretreatment. Moment (3) is an in the gear shift torque phase start enable time course that allows motor mechanism start control during a torque phase of a gear shift. Moment (4) is one in the shift phase inertia start enable time course that allows a motor mechanism start during an inertia phase of a shift. The moment (5) is one in the shift CL sync phase start prohibition time course which prohibits a motor mechanism start during a CL sync phase of a gear change. The following is an explanation regarding the operations in each of the moments (1) to (5).
Figure 11 is a graph of time in the course of time of total ban from starting gear lift (1). The variables shown are NEXTGP_MAP, NEXTGP, CURGP, Start Control Signal (ENGSTART), Engine Speed, Target Speed, ENG Speed, CL2 Fluid Pressure, Coupling Fluid Pressure, Longitudinal Acceleration G, Start Prohibit Signal and signage prohibiting gear shifting. In the case of the total prohibition of starting gear lift time elapses, the motor mechanism start control is started at time t1 when a motor mechanism start request is generated, and the motor mechanism start control is terminated at the time t4. On the shift control side, even if a shift request is generated at time t2 immediately after time t1, the shift prohibit signaling is set during engine start control from t1 to t4. Consequently, the gearshift control is started at time t4, at which time the engine start control ends. This unique treatment prohibiting a gear lift acts to increase inlet rotational speed and deteriorate fuel consumption. Furthermore, after acceleration G is increased by means of drive force transmission in the first gear, the acceleration G is decreased by consecutively raising gear to the second gear. In this way, the acceleration G is varied in order to give the driver an uncomfortable impression of the actuation force.
Figure 12 is a graph of time in the course of time of start ban pretreatment of gear shift (2). Again, the variables shown are NEXTGP_MAP, NEXTGP, CURGP, start control flag (ENGSTART), engine speed, target speed, ENG speed, CL2 fluid pressure, coupling fluid pressure, G longitudinal acceleration, flag to prohibit departure and signaling to prohibit gear change. In the case of the gearshift pretreatment start prohibition time elapses, the gearshift control is started at time t1, and a period from time t1 to time t3 is the pretreatment period. During this period from t1 to t3, the prohibit start flag is established. Therefore, the start of motor mechanism start control is delayed from time t2, in which a motor mechanism start request is produced, to time t3 later. When the engine mechanism start request is produced during the shift control, the control system is unable to maintain the slip state of the second CL2 clutch during pretreatment. Therefore, the prohibit departure flag is established for the pre-treatment period. In the torque phase and thereafter, the control system performs the shift control and the engine start control simultaneously.
Figure 13 is a graph of time in shift torque phase start enable time course (3). The variables shown are NEXTGP_MAP, NEXTGP, CURGP, start control signaling (ENGSTART), engine speed, target speed, ENG speed, CL2 fluid pressure, coupling fluid pressure, G longitudinal acceleration, G signaling prohibit starting and signaling prohibit gear change. In the case of the start allow time elapse of the gear shift torque phase (3), the start prohibit signal is set to one during the pre-treatment period of a gear shift from time t1 to time t2. Motor engine start control is initiated immediately at time t3 in response to the motor engine start request generated at time t3 during the torque phase. Thus, when the engine engine start request is generated during the torque phase, the control system initiates the engine engine start control at the time of the engine engine start request, and then performs the shift control. and engine start control simultaneously.
The control system prohibits starting the motor mechanism during pretreatment and allows starting the motor mechanism during the torque phase for the following reason.
Figure 14 is a nomogram or collinear diagram representing rotational speed variation in the AT automatic transmission in the course of shift torque phase start enable time (3). At the time of a 1^2 gear lift, it is necessary to use Low/B as the second CL2 clutch and maintain the slip of the second CL2 clutch via engine rotational speed control during engine start control. Referring to the times in Fig. 13, the 1^2 gear lift is performed by passing the first speed gear state of (a), corresponding to times t1 to t3, ^ the torque/phase state. inertia of (b), corresponding to times t3 to t5, ^ the synchronization phase state of (c), corresponding to times t5 to t7, ^ the second speed gear state of (d), corresponding to time t7 and later. In this case, the capacity of the 2346/B serving as the coupling element in the 1^2 gear lift becomes deficient in the torque phase and inertia phase. Therefore, the input rotational speed decreases as shown by the dashed lines in (b) and (c), and the system becomes unable to maintain the Low/B slip used as the second CL2 clutch. Thus, a possibility of shock arises and the acceleration G decreases if the input rotational velocity is decreased to below the velocity of the first velocity before the 2346/B reaches capacity. Factors to decrease the input rotational speed were found to be excessive clutch of the first CL1 clutch and transmission input torque deficiency due to deficient MG torque. Therefore, by allowing the start of motor mechanism start control positively during the torque phase, the control system can solve the transmission input torque deficiency and maintain the slip state of the second clutch CL2 (Low/B) such as as shown by a solid line in figure 14.
Figure 15 is a graph of time in shift inertia phase start enable time course (4). Again, the variables shown are NEXTGP_MAP, NEXTGP, CURGP, start control flag (ENGSTART), engine speed, target speed, ENG speed, CL2 fluid pressure, coupling fluid pressure, G longitudinal acceleration, flag to prohibit departure and signaling to prohibit gear change. In the case of the shift inertia phase start permission time elapse, if the motor mechanism start request is generated at time t4 in an inertia phase start region of a gear shift, the motor mechanism start is started immediately at time t4 and ends at time t7. On the gearshift control side, on the other hand, engine speed control is performed in response to a request from the engine start control, and the gearshift prohibit signal is set from time t4 to time t7 .
Fig. 16 is a graph of time in CL synchronization phase start prohibition time course (5). The variables shown are NEXTGP_MAP, NEXTGP, CURGP, Start Control Signal (ENGSTART), Engine Speed, Target Speed, ENG Speed, CL2 Fluid Pressure, Coupling Fluid Pressure, Longitudinal Acceleration G, Start Prohibit Signal and signage prohibiting gear shifting. In the case of CL sync phase start prohibition time elapse, if a motor mechanism start request is generated at time t5 in a CL sync phase of a gear change (between time t4 and time t6), the motor mechanism start control is delayed until time t6. The motor mechanism start control is started at time t6 and ended at time t8. On the shift control side, engine speed control is performed from time t6 to time t7 in response to a request from engine start control, and the shift prohibit signal is set. However, the current gearshift operation is continued and ends exactly after time t6.
The control system for the hybrid vehicle according to the first modality can provide the following effects.
A first embodiment includes a control apparatus for controlling a hybrid vehicle comprising an ENG motor mechanism, a motor (MG motor/generator) provided in an ENG motor mechanism drive system for a sprocket RL, RR, and arranged to start the ENG motor mechanism and drive the RL, RR drive wheel, mode selection device (the first CL1 clutch) provided between the ENG motor mechanism and the motor (MG motor/generator), and arranged to change a vehicle drive mode between a hybrid drive mode (HEV mode) using the ENG motor mechanism and the motor (MG motor/generator) as a drive source and an electric drive mode (EV mode) using the motor (MG motor/generator) as the source of drive, an automatic transmission AT arranged between the engine (motor/generator MG) and the drive wheel RL, RR, and arranged to have a plurality of gear positions of different speed ratios, start/stop control device of mechanics motor (the integrated controller 10) to perform an ENG motor mechanism start control in response to a start request at the time of mode change to hybrid drive mode (HEV mode), and an ENG motor mechanism stop control in response to a request to stop at the time of mode change to electric drive mode (EV mode), shift control device (the 7 automatic transmission controller) to perform a shift control of shifting the automatic transmission gear position from a current position to a request position in response to a gear change request during vehicle displacement and control device coordinate engine/transmission mechanism (figures 6 to 8) that when in the course of a first control which is one of the engine start/stop control of the engine engine ENG and the shift control of the automatic transmission AT, starts a second control which is the other of the engine start/stop control of the engine engine ENG and the shift control of the AT automatic transmission, at a time of the second control request when a shock does not exceed an acceptable level even if the second control is initiated at the time of request, and initiates the second control by waiting until an allow time to allow the second control when the shock exceeds the acceptable level if the second control is initiated at the time of demand.
The control apparatus can prohibit shock and minimize adverse influence on retarding and fuel consumption when, during one of the start/stop control of the engine mechanism ENG and the shift control of the automatic transmission AT, a control request for the another is generated. A gear-shift prohibit signaling device (the gear-shift prohibit determination section 10d) is provided to establish a gear-shift prohibit signaling when a condition affecting a shock is satisfied if the gearshift control is started after an engine start control start. If the shift prohibit signal is not established, the engine/transmission mechanism coordinate control device (figure 7) initiates the shift control at a request time when a shift control request is generated during the engine start control. If the gear-shift prohibit signal is established, the engine/transmission mechanism coordinate control device (figure 7) delays the gear-shift control until a time at which the gear-shift prohibit signal is reset and control starts. of gear shift at the time of reset.
Therefore, when a gearshift control request is generated during engine start control, the control apparatus can prohibit shock and minimize adverse influence on retarding and fuel consumption. Thus, the control apparatus gives priority to preventing gear shift shock, and the control apparatus can limit the adverse influence on fuel delay and consumption by monitoring the prohibit gear shift signal regularly in order to satisfy the request. shift control during the engine start control run period before an end of engine start control.
The gear-shift prohibit signaling device (the gear-shift prohibit determination section 10d) sets the gear-shift prohibit signaling when gear shift is requested during an engine rotational speed control and ratio determination of gears on the shift control side is not feasible. Therefore, the control apparatus may prohibit shifting shock because of initiation of shifting control during motor mechanism start control in a displacement situation where the uncoupled/coupled state of the clutch is uncertain.
The gear-shift prohibit signaling device (the gear-shift prohibition determination section 10d) sets the gear-shift prohibit signaling when gear shift is requested with a constant throttle opening and a driver demand to reduce shock is high. Therefore, the control apparatus may prohibit shifting shock because of the initiation of the shift control during engine start control in a start-up situation where the driver's demand to reduce shock is high.
The gear-shift prohibit signaling device (the gear-shift prohibit determination section 10d) sets the gear-shift prohibit signaling when gear shift is requested where transmission input torque control is difficult and the possibility of affecting shock is high. Therefore, the control apparatus may prohibit gear shift shock because of the initiation of shift control during engine start control in a drive situation where transmission input torque control is difficult.
While it is preferable to incorporate all of these establishments from signaling to prohibit shifting into the control system, it is possible to incorporate one or more of the establishments. A start prohibit signaling setting device (the start prohibit signal generating section 71a) is provided to establish a start prohibit signaling when a condition affecting a crash is satisfied if the motor mechanism start control is initiated after a start of the shift control. The engine/transmission engine engine start control device (figure 8) initiates engine engine start control at a time of demand when an engine engine start control request is generated during shift control in the case where the start prohibit signal is not set and starts the motor engine start control at a time at which the start prohibit signal is reset by delaying the motor engine start control in the case that the start prohibit signal is set.
Therefore, when an engine engine start control request is generated during the shift control, the control apparatus can prohibit shock and minimize adverse influence on retarding and fuel consumption. Thus, the control apparatus gives priority to gear shift shock prevention, and the control apparatus can restrict the adverse influence on fuel delay and consumption by monitoring the prohibit start signaling regularly during the period of execution of the control. shifting before an end of shift control and upon initiating engine start control immediately when signaling is re-established.
The start prohibit signaling setting device (the start prohibit signal generating section 71a) sets the start prohibit signaling in case of a gear shift phase in which a controlled slip clutch to slip in the start control is unable to maintain slip because of a balance of capabilities between the slip clutch and a shift clutch participating in the shift. Therefore, in addition to the effect of minimizing adverse influence on retarding and fuel consumption, the control apparatus may prohibit starting shock because of initiation of engine start control during gear shift control in a situation where the second clutch CL2 it is unable to maintain slip on engine start control.
The start prohibit signaling setting device (the start prohibit signal generating section 71a) sets the start prohibit signaling during a gear change in which a slip clutch is controlled to slip in the start control and a coupling clutch when changing gears they are the same clutch. Therefore, in addition to the effect of minimizing adverse influence on retarding and fuel consumption, the control apparatus may prohibit starting shock because of initiation of engine engine start control during gear shift control in a situation where the second clutch CL2 is the same gear shift clutch clutch. The start prohibit signaling setting device (the start prohibit signal generating section 71a) sets the start prohibit signaling during a gear change using a one-way clutch. Therefore, in addition to the effect of minimizing adverse influence on retarding and fuel consumption, the control apparatus may prohibit shock shock because of initiation of engine engine start control during gear shift control in a situation where the gear shift gear using the one-way clutch is in progress.
While it is preferable to incorporate all of these establishments from the signaling prohibit departure into the control system, it is possible to incorporate one or more of the establishments.
The start prohibit signaling setting device (the start prohibit signal generating section 71a) sets the start prohibit signaling in a gear shift phase region in which the engine rotational speed control is performed at the shift of march. This option allows the controller to additionally prohibit shock printing because of initiation of motor mechanism start control during shift control in the shift phase region in which engine speed control is performed.
Although the hybrid vehicle control apparatus according to the present invention has been described above with reference to a first embodiment of the invention, the invention is not limited to the first embodiment. Various modifications, design variations and additions are permissible within the scope of the present invention as defined by the claims.
In the example illustrated according to the first mode, during a control of one of the motor mechanism start control and the gearshift control a control request for the other is generated. However, the coordination control according to the present invention is applicable to the case in which, during a control of one of the motor mechanism stop control and the gearshift control, a control request for the other is generated. .
In the illustrated example of the first mode, the second clutch CL2 is selected from the friction elements incorporated in the AT stage automatic transmission. However, it is optional to provide a separate second CL2 clutch in addition to the AT automatic transmission. For example, the scope of the invention includes an example in which the second clutch CL2 separate from the AT automatic transmission is provided between the engine/generator MG and the transmission input shaft, and an example in which the second clutch CL2 separate from the Automatic AT transmission is provided between the transmission output shaft and the sprocket.
In the illustrated example, the AT automatic transmission is the automatic staged transmission having seven forward speeds and one reverse speed. However, the number of gear positions is not limited to this. Automatic transmission can be an automatic transmission having two or more speeds.
In the first mode, the first clutch CL1 is used as the mode selection device to switch between HEV mode and EV mode. However, the mode selection device can be a differential device, a power split device or other device, such as a planetary gear, to function as a clutch without using a clutch.
In the illustrated example, the hybrid vehicle is a rear wheel driven hybrid vehicle. However, the present invention is applicable to a hybrid drive vehicle driven by the front wheel. The present invention is applicable to various other hybrid vehicles having an automatic transmission where the drive mode includes an HEV mode and an EV mode.
The embodiments described above have been described in order to allow easy understanding of the invention and not to limit the invention. Rather, the invention is intended to cover various modifications and equivalent arrangements included within the scope of the appended claims, the scope of which is to be given the broadest interpretation in order to cover all such modifications and equivalent structure as permitted under the law.

权利要求:
Claims (11)
[0001]
1. Control apparatus for controlling a hybrid vehicle comprising: a motor mechanism, an engine provided in a drive system extending from the motor mechanism to a drive wheel (RR, RL), the motor arranged to start the motor mechanism and drive the drive wheel (RR, RL), a mode selection device (CL1) provided between the motor mechanism and the engine, the mode selection device (CL1) arranged to change a vehicle drive mode between a hybrid drive mode using the motor mechanism and motor as a drive source and an electric drive mode using the motor as the drive source, an automatic transmission arranged between the motor and the drive wheel (RR, RL), the automatic transmission arranged to provide a plurality of speed ratios, an integrated controller (10) which performs a motor mechanism start/stop control, the motor mechanism start/stop control being a motor start control. motor engine in response to a start request at the time of mode change to hybrid drive mode or a motor mechanism stop control in response to a stop request at the time of mode change to electric drive mode, and an automatic transmission controller (7) that performs a shift control of changing an automatic transmission gear position from a current position to a demand position in response to a shift request during vehicle shifting, and the control apparatus CHARACTERIZED by the fact that the integrated controller (10) determines whether a condition exists such that a shock will exceed an acceptable level if a second control, which is one of the motor mechanism start/stop control and the shift control, is initiated at a time of a second control request when the second control request is generated during a period. Execution mode of a first control, which is the other between the motor mechanism start/stop control and the gearshift control, prohibits the start of the second control at the time of the second control request when the condition exists, repeatedly determines whether the condition continues to exist after prohibiting start of the second control and during the execution period of the first control, and starts the second control at an allow time after the time of the second control request and during the execution period of the first control when the condition no longer exists.
[0002]
2. Control apparatus, according to claim 1, CHARACTERIZED by the fact that the integrated controller (10) establishes a signal to prohibit gear change when the condition exists if the second control request is the gear change request for the shift control that occurs after a start of motor mechanism start control, and the integrated controller (10) is configured to initiate the shift control at the time of the second control request if the second control request is generated during start control in a case where the gear change prohibit signal is not established and to initiate the gear change control at a reset time in which the gear change prohibit signal is reset by delaying the gear control shifting from the moment of the second control request in a case where the signal to prohibit shifting is established.
[0003]
3. Control apparatus, according to claim 2, CHARACTERIZED by the fact that the integrated controller (10) is configured to establish the signal to prohibit gear change when the gear change request is a request for a gear change during engine rotational speed control and determination of a gear ratio on a gearshift control side is not feasible.
[0004]
4. Control apparatus, according to claim 2 or 3, CHARACTERIZED by the fact that the integrated controller (10) is configured to establish the signal to prohibit gear change when the gear change request is a request for a change gear with a constant throttle opening.
[0005]
5. Control apparatus, according to any one of claims 2 to 4, CHARACTERIZED by the fact that the integrated controller (10) is configured to establish the signal to prohibit gear change at the time of motor mechanism start operation in neutral.
[0006]
6. Control apparatus, according to claim 1, CHARACTERIZED by the fact that the integrated controller (10) establishes a signal to prohibit starting when the condition exists if the second control request is the starting control of the motor mechanism that occurs after a shift control start, and the integrated controller (10) is configured to initiate start control at the time of the second control request if the second control request is generated during the shift control in a case where the prohibit start signal is not established and to initiate the start control at a time of reset in which the prohibit start signal is reset by delaying the start control from the time of the second control request in a case where the prohibit start sign is established.
[0007]
7. Control apparatus according to claim 6, CHARACTERIZED by the fact that the integrated controller (10) is configured to establish the prohibit start signaling in a case where a gearshift phase of the gearshift control occurs where a clutch (CL2) controlled to slip in the starter control is unable to maintain slip because of a balance of capabilities between the clutch (CL2) and a shift clutch participating in the shift control.
[0008]
8. Control apparatus according to claim 6 or 7, CHARACTERIZED by the fact that the integrated controller (10) is configured to establish the prohibit start signal during a gear change in which a clutch (CL2) is controlled to slip in start control it is the same as a clutch clutch (CL2) in gear shift.
[0009]
9. Control apparatus according to any one of claims 6 to 8, CHARACTERIZED by the fact that the integrated controller (10) is configured to establish the prohibit start signal during a gear change using a unidirectional clutch (F1 , F2).
[0010]
10. Control apparatus according to any one of claims 6 to 9, CHARACTERIZED by the fact that the integrated controller (10) is configured to establish the signaling prohibit starting in a gear shift phase of the shift control in which engine rotational speed control is performed in a gear change.
[0011]
11. Method for controlling a hybrid vehicle, the hybrid vehicle including an engine mechanism, an engine, a drive wheel (RR, RL) and an automatic transmission arranged between the engine and the drive wheel (RR, RL) and arranged to provide a plurality of speed ratios, the method comprising: controlling a selection between an electric drive mode in which the hybrid vehicle is driven by the engine only and a hybrid drive mode in which the hybrid vehicle is driven by both the engine mechanism and the engine, initiating a motor mechanism start/stop control to selectively perform the hybrid drive mode or the electric drive mode responsive to a motor mechanism start/stop request, the motor mechanism start/stop request being one of an engine engine start request or an engine engine stop request, performing an automatic transmission shift control while the hybrid vehicle is is moving responsive to a speed ratio change request, initiate a first control including one of the engine start/stop control and the shift control responsive to the engine start/stop request or to the speed ratio change request, whichever is produced first, receive a request for a second control of the other between the motor mechanism start/stop control and the shift control while the first control is in progress, the method CHARACTERIZED by the fact that it further comprises determining whether a condition exists such that an automatic transmission gear shift shock would be greater than an acceptable level if the request for the second control were executed upon receipt of the request for the second control, prohibit starting the second control when receiving the request for the second control when the condition exists during the first control, repeatedly determining whether the condition continues to exist after prohibiting the start of the second control and during the first control, and starting the second control by determining that the condition no longer exists during the first control.

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同族专利:

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BR112013001547A2|2016-05-24|

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WO2012010951A2|2012-01-26|

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JP2012025228A|2012-02-09|

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KR101519810B1|2015-05-13|

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MX2013000508A|2013-02-21|

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法律状态:
2018-12-26| B06F| Objections, documents and/or translations needed after an examination request according [chapter 6.6 patent gazette]|

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2019-07-09| B06T| Formal requirements before examination [chapter 6.20 patent gazette]|

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2021-03-09| B06A| Notification to applicant to reply to the report for non-patentability or inadequacy of the application [chapter 6.1 patent gazette]|

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2021-06-08| B09A| Decision: intention to grant [chapter 9.1 patent gazette]|

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2021-07-06| B16A| Patent or certificate of addition of invention granted|Free format text: PRAZO DE VALIDADE: 20 (VINTE) ANOS CONTADOS A PARTIR DE 19/07/2011, OBSERVADAS AS CONDICOES LEGAIS. |

优先权:

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申请号 | 申请日 | 专利标题

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JP2010164194A|JP5742124B2|2010-07-21|2010-07-21|Control device for hybrid vehicle|

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JP2010-164194|2010-07-21|

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PCT/IB2011/001677|WO2012010951A2|2010-07-21|2011-07-19|Control apparatus and method for hybrid vehicle|

---