• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    Method for controlling a drive system of a vehicle. The drive system comprises a combustion engine (2) with an output shaft (2a), a gearbox (3) with an input shaft (3a), an electrical machine (9) that comprises a stator (9a) and a rotor (9b), and a planetary gear that comprises a sun gear (10), a ring gear (1 1 ) and a planet wheel carrier (12). The method comprises, if the torque from the combustion engine and the electrical machine is sufficient for the operation of the vehicle with the planetary gear in the released state, and if the fuel consumption of the vehicle with the planetary gear in the released state is lower than in the locked states, controlling the electrical machine and the combustion engine so that the requested torque is provided while the planetary gear is in the released state. Otherwise the planetary gear is arranged in the locked state and the method is terminated.
    公开号:SE1250708A1
    申请号:SE1250708
    申请日:2012-06-27
    公开日:2013-12-28
    发明作者:Niklas Pettersson；Mikael Bergqvist；Johan Lindstroem；Anders Kjell；Mathias Bjoerkman
    申请人:Scania Cv Ab；
    IPC主号:
    专利说明:

    PRIOR ART Hybrid vehicles can be driven by a primary engine which can be an internal combustion engine and a secondary engine which can be an electric machine. The electrical machine is equipped with at least one energy storage for storing electrical energy and control equipment to regulate the flow of electrical energy between the battery and the electrical machine. The electric machine can thus alternately work as an engine and generator depending on the vehicle's operating condition. When the vehicle is braked, the electric machine generates electrical energy which is stored in energy storage. The stored electrical energy is later used for operation of the vehicle. The electric machine can be arranged in a position between a clutch mechanism and the gearbox in the vehicle.
    Conventional operating systems are designed so that they only offer a few operating modes that are adapted to the main loads during the operation of the vehicle. A disadvantage of a conventional drive system is that the operating methods at low load result in a relatively fuel-intensive operation of the vehicle and a limited torque range.
    US 6,354,974 discloses a drive system for a hybrid vehicle. The hybrid vehicle comprises an internal combustion engine and an electric machine mounted on the output shaft of the internal combustion engine. The purpose here is to create a compact drive unit that does not need to use a conventional coupling mechanism. The conventional clutch mechanism has here been replaced by a planetary gear and three friction clutches. With the help of the friction clutches, different operating conditions can be created in the vehicle. The utilization of friction couplings results in energy losses.
    SUMMARY OF THE INVENTION An object of the present invention is to provide a method for controlling a drive system of a vehicle in order to reduce the fuel consumption of the vehicle.
    These objects are achieved by the initial procedure characterized in that steps a) -d) are iterated, a) information on a requested torque for the operation of the vehicle, at least a first operating parameter of the internal combustion engine and at least a second operating parameter of the electric machine are received , b) whether the torque available from the internal combustion engine and the electric machine is sufficient to achieve the required torque by means of the planetary gear in the release position, c) the fuel consumption of the vehicle at the planetary gear in the release position and in the locked position is determined on the basis of the first and second operating parameters d) if the torque from the internal combustion engine and the electric machine is sufficient to achieve the required torque by means of the planetary gear in the release position, and if the vehicle's fuel consumption by means of the planetary gear in the release position is lower than in the locked position, the electric machine and internal combustion engine are controlled tillha is maintained while the planetary gear is in the release position, otherwise the planetary gear is set in the locked position and the procedure is terminated.
    At low loads for the operation of the vehicle, it is economically advantageous to operate the drive system according to the procedure. The method comprises the step of determining whether torque from the internal combustion engine and the electric machine is sufficient for the operation of the vehicle by means of the planetary gear in the release position, i.e. whether it is possible to drive the vehicle with the planetary gear in the release position according to the requested torque. The method also comprises the step of determining whether the vehicle's fuel consumption by means of the planetary gear in the release position is lower than fuel consumption in the locked position, i.e. whether driving the vehicle with the planetary gear in the release position is precautionary with respect to the vehicle's fuel consumption.
    If both conditions are met, the procedure in a subsequent step involves controlling the electric machine and the internal combustion engine at the same time so that the required torque is provided. The control of the electric machine and the internal combustion engine takes place while the planetary gear is in the release position and while the speed of the internal combustion engine is maintained constant. If, on the other hand, any of the conditions are not met, the planetary gear is set in the locked position and the procedure is terminated.
    By operating the vehicle according to the procedure while maintaining the speed of the internal combustion engine, it is possible to reduce the fuel consumption because a low speed results in lower friction losses in the internal combustion engine in relation to a high speed. The process thus enables a reduced fuel consumption in relation to drive systems according to the prior art.
    The internal combustion engine according to the method contributes to propelling the vehicle and not only to driving any auxiliary units in the vehicle as in the prior art. The procedure is suitable for low operating loads / required torques in relation to the vehicle's main operating load / required torques.
    The method makes it possible to control the speed of the internal combustion engine in order to achieve an optimal operating condition. The low speed enables, for example, an increase in the temperature of the exhaust gas temperature from the internal combustion engine, which is advantageous for the purification of the exhaust gases in an exhaust gas after-treatment system.
    According to an embodiment of the invention, the method is initiated with the steps of: - information about a first operating parameter of the internal combustion engine and a second operating parameter of the electric machine is received, - the fuel consumption of the vehicle by planetary gear in the release position and in the locked position is determined on the basis of the first and the second operating parameter, - if the vehicle's fuel consumption by means of the planetary gear in the release position is lower than in the locking position, the planetary gear is set in the release position and steps a) -d) are iterated. the alteration according to steps a) - d) is thus initiated only if the release mode results in a lower fuel consumption than in the lock mode.
    According to an embodiment of the invention, at said initiation of the process, the drive system is in a position where the planetary gear is in the locked position, the vehicle is under driving and a gearbox is arranged with a gear. The position where the planetary gear is in the locked position, the vehicle is being driven and the gearbox is set up with a gear refers to the main operating procedure for the vehicle at high loads.
    According to an embodiment of the invention, the electric machine is controlled with respect to one of a torque and a speed, and the internal combustion engine is controlled with respect to the other of the torque and the speed.
    Preferably, the electric machine is controlled with respect to a torque while the internal combustion engine is controlled with respect to the speed. Thereby, the process enables the operation of the vehicle to take place at a low speed of the internal combustion engine, which is advantageous for reducing fuel consumption. Alternatively, the electric machine is controlled with respect to a speed while the internal combustion engine is controlled with respect to a torque.
    According to an embodiment of the invention, the internal combustion engine is controlled so that the speed of the internal combustion engine is minimized with respect to a torque requested by the internal combustion engine. By minimizing the speed of the internal combustion engine, the fuel consumption of the vehicle is reduced. The internal combustion engine is speed controlled at the lowest speed where the required torque can be obtained. Normally this speed is the same as the engine idle speed which is the lowest possible due to comfort reasons.
    According to an embodiment of the invention, the internal combustion engine is controlled so that the internal combustion engine has an idle speed. The term “idle speed” refers to a position in which the internal combustion engine has the speed at idling, where the internal combustion engine does not contribute torque.
    According to an embodiment of the invention, the first operating parameter is the speed of the internal combustion engine. The fuel consumption of the vehicle depends on the speed of the internal combustion engine as the friction losses increase with increasing speeds. Thus, as low a speed as possible of the internal combustion engine is advantageous for reducing the fuel consumption during the iteration of steps a) - d).
    According to an embodiment of the invention, the second operating parameter is the developed torque of the electrical machine. The fuel consumption of the vehicle is dependent on the developed torque of the electric machine because the amount of energy in the energy storage decreases depending on the developed torque and is then replenished by means of energy from the internal combustion engine.
    According to an embodiment of the invention, the planetary gear holder and the sun gear are locked to each other when the planetary gear is set in the locking position and the planetary gear holder and the sun gear are released from each other when the planetary gear is set up in the release position.
    According to one embodiment of the invention, it is determined whether the torque from the internal combustion engine is sufficient for the operation of the vehicle at the piano gear in the external release position [developed torque from the internal combustion engine x gear ratio] and whether the torque from the electric machine (9) is sufficient to operate the vehicle at the planetary gear in the release position from the outside [developed torque from the electric machine x [1 - gear ratio]], where the gear ratio is given by the ratio between the number of teeth on the sun gear and [the number of teeth on the ring gear + the number of teeth on the so | hju | et ]. Preferably, the planetary gear is arranged with a planetary gear equation according to the following gear ratio: -z, lzs = (us- wc / (w, - ws) = 102/66, where z refers to the number of teeth, d) rotational speed, index s the sun gear and index r ring wheel.
    Another object of the present invention is to provide a method of controlling a drive system for the purpose of reducing the wear of the gearbox during acceleration of the vehicle.
    The invention achieves the object by an embodiment of the invention, wherein the gearbox comprises at least a first gear with a first lowest torque, a second gear with a second lowest torque, and a third gear with a third lowest torque, the first lowest torque is lower than the second lowest torque and the second lowest torque is lower than the third lowest torque, the method comprising: - the planetary gear is set in the release position while the gearbox is arranged in the first gear, - the torque of the drive system is increased from at least the the second lowest torque to at least the third lowest torque by increasing the torque of the internal combustion engine and the electric machine while maintaining the speed of the internal combustion engine, - the gearbox is switched from the first gear to the third gear, and - the planetary gear is set in the locked position and the process ends.
    The method makes it possible to skip gears when accelerating the vehicle by the electric machine contributing torques comprising at least the second lowest torque to at least the third lowest torque when the gearbox is arranged in the first gear, and at at least the third lowest torque take the gearbox in the third gear. The method makes it possible for the acceleration of the vehicle to take place without successively moving from the first gear to the third gear, which results in less wear on the gearbox. In addition, better comfort is possible when accelerating the vehicle by til! example any clutch jerks are avoided.
    According to an embodiment of the invention, the locking means is adapted to engage the ring gear and the planetary gear holder in the locking position so that they rotate together, the change from the locking position and the release position comprises: - the electric machine and the internal combustion engine are controlled to a mutually torque-free state. the ring gear and the planet gear holder so that the ring wheel and the planet wheel holder are freely rotatable relative to each other.
    According to an embodiment of the invention, the locking means is adapted to interconnect the ring gear and the planetary gear holder in the locking position so that they rotate together, the growth from the release position to the locking position comprises: - the electric machine and the internal combustion engine being controlled to a mutually torque-free state. engagement with the ring gear and the planetary gear holder.
    According to an embodiment of the invention, the output shaft of the internal combustion engine is connected to the sun gear so that they rotate as a unit with a first speed, that the input shaft of the gearbox is connected to the planetary gear holder so that they rotate as a unit with a second speed, and that the electric the rotor of the machine is connected to the ring gear so that the ring wheel rotates at a third speed.
    The present invention also relates to the drive system mentioned in the introduction. The drive system is characterized in that it comprises a control unit adapted that if torque from the internal combustion engine and the electric machine is sufficient for the operation of the vehicle by means of the planetary gear in the release position, and if the vehicle's fuel consumption by the piano gear in the release position is lower than in the locked position, the internal combustion engine so that the required torque is provided while the planetary gear is in the release position and while maintaining the speed of the internal combustion engine.
    According to an embodiment of the invention, the drive system comprises means for controlling the speed of the internal combustion engine. For example, the means for controlling the speed is a speed regulator.
    According to one embodiment of the invention, the drive system comprises means for controlling the torque of the electrical machine. Preferably, the developed torque from the electrical machine is controlled by the control system controlling the supply of electric power.
    BRIEF DESCRIPTION OF THE DRAWINGS In the following, as an example, preferred embodiments of the invention are described with reference to the accompanying figures.
    Fig. 1a shows a drive system for operating a vehicle according to the present invention.
    Fig. 1b shows the drive system of Fig. 1a in detail.
    Fig. 2 shows a flow chart of a method for controlling the drive system according to a first embodiment of the invention.
    Fig. 3 shows a flow chart of a method for controlling the drive system according to a second embodiment of the invention.
    DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS OF THE INVENTION Fig. 1a shows a driveline for a heavy vehicle 1. The driveline comprises an internal combustion engine 2, a gearbox 3, a number of drive shafts 4 and drive wheels 5. Between the combustion engine 3 and intermediate lot 6.
    Fig. 1b shows the components of the intermediate portion 6 in more detail. The internal combustion engine 2 is provided with an output shaft 2a and the gearbox 3 with an input shaft 3a in the intermediate portion 6. The output shaft 2a of the internal combustion engine is arranged coaxially with respect to the input shaft 3a of the gearbox.
    The output shaft 2a of the internal combustion engine and the input shaft 3a of the gearbox are rotatably arranged about a common axis of rotation 7. The intermediate portion 6 comprises a housing 8 which encloses an electric machine 9 and a planetary gear. The electric machine 9 usually comprises a stator 9a and a rotor 9b. The stator 9a comprises a stator core which is suitably attached to the inside of the housing 8. The stator core includes the stator windings. The electric machine 9 is adapted to use stored electrical energy during certain operating times to supply driving force to the input shaft 3a of the gearbox and during other operating uses the kinetic energy 3 of the input shaft 3 of the gearbox to utilize and store electrical energy.
    The planetary gear is arranged substantially radially inside the stator 9a and rotor 9b of the electric machine. The planetary gear usually comprises a sun gear 10, a ring gear 11 and a planet gear holder 12. The planet gear holder 12 carries a number of gears 13 which are rotatably arranged in a radial space between the teeth of the sun gear 10 and the ring gear 11. The sun gear 10 is attached to a peripheral surface of the output shaft 2a of the internal combustion engine. The sun gear 10 and the output shaft 2a of the internal combustion engine rotate as a unit with a first speed n1. The planet gear holder 12 comprises a mounting portion 12a which is fixed on a peripheral surface of the input shaft 3'a of the gearbox by means of a splines joint 14. By means of this joint, the planet gear holder 12 and the input shaft 3a of the gearbox 11 can rotate as a unit with a second speed ng.
    The ring gear 11 comprises an outer peripheral surface on which the rotor 9b is fixedly mounted. The rotor 9b and the ring gear 11 form a rotatable unit which rotates at a third speed ng.
    The drive system also includes locking means adapted to shift the piano gear between a release position in which the sun gear 10, the ring wheel 11 and the planet gear holder 12 are freely rotatable relative to each other, and a locking position in which the planet wheel holder 12 and the sun wheel 10 are locked to each other. The locking means is adapted to interconnect the ring gear 11 and the planetary gear housing 12 in the locking position so that they rotate together. the switching between the locking position and the release position comprises controlling the electric machine 9 and the internal combustion engine 2 to a mutually torque-free state and then displacing the locking means from / into engagement with the ring gear 11 and the planetary gear housing 12.
    The locking means comprises a slidable coupling member 15 on the output shaft 2a of the internal combustion engine. The coupling member 15 is attached to the output shaft 2a of the internal combustion engine by means of a splines joint 16. The coupling member 15 is in this case rotatably arranged on the output shaft 2a of the internal combustion engine and slidably arranged in an axial direction on the output shaft 2a of the internal combustion engine. The coupling means 15 comprises a coupling portion 15a which is connectable to a coupling portion 12b of the planetary gear holder 12. The locking means also comprises a displacing means 17 adapted to displace the coupling means 15 between the release position when the coupling portions 15a, 12b are not in engagement with each other and the locking position the coupling portions 15a, 12b are in engagement with each other. When the coupling portions 15a, 12b are in engagement with each other, the output shaft 2 of the internal combustion engine and the input shaft 3 of the gearbox will rotate at the same speed.
    An electric control unit 18 or several electric control units 18 in combination are adapted to control the displacement means 17. The control unit 18 is also adapted to determine at which times the electric machine 9 should operate as a motor and at which occasions it should operate as a generator. . To determine this, the control unit 18 can receive current information from suitable operating parameters. The control unit 18 may be a computer with suitable software for this purpose. The control unit 18 also controls a schematically shown control equipment 19 which regulates the flow of electrical energy between an energy storage 20 and the stator 9a of the electrical machine. The energy storage is preferably a hybrid battery or a capacitor. At times when the electric machine 9 operates as a motor, stored electrical energy is supplied from the energy storage 20 to the stator 9a. At times when the electric machine works as a generator, electrical energy is supplied from the stator 9a to the energy storage 20. The energy storage 20 supplies and stores electrical energy with a voltage of the order of 300-700 volts. When the intermediate portion 6 between the internal combustion engine 2 and the gearbox 3 in a vehicle is limited, it is required that the electric machine 9 and the planetary gearbox constitute a compact unit. The components 10-12 of the planetary gear are arranged here substantially radially inside the stator 9a of the electric machine.
    The rotor 9b of the electric machine, the ring gear 11 of the planetary gear, the output shaft 2a of the internal combustion engine and the input shaft Sa of the gearbox are here rotatably arranged around a common axis of rotation 5. With such an embodiment the electric machine 9 and the planetary gear occupy a relatively small space .
    The vehicle comprises a 24 volt battery 21 for starting the internal combustion engine 2 and operating other equipment in the vehicle 1. In heavy vehicles 1, 24 volt batteries 21 with a relatively high capacity are used. The 24 volt battery 21 is, via an electrical line and a coupling mechanism 23, connectable to the stator 9a of the electrical machine. The electrical line includes a DC-DC transformer 22 between the 24 volt battery 21 and the coupling mechanism 23. The DC-DC transformer 22 has the capacity to convert electrical energy conducted from the stator 9a of the electrical machine, which supplies electrical energy with the same voltage level. as 13 the energy storage 20, to the voltage level prevailing in the 24 voit battery 21. The DC-DC transformer 22 can advantageously be bidirectional. It can thus also, if necessary, conduct electrical energy from the 24 volt energy storage 20 to the stator 7 of the electrical machine. When electrical energy is conducted in this direction, the DC-DC transformer 22 converts electrical energy with the voltage level 24 volts to the higher voltage level of the hybrid battery.
    The drive system comprises means for detecting a first operating parameter of the internal combustion engine 2 and a second operating parameter of the electric machine 9. Preferably, the first operating parameter is the speed of the internal combustion engine and the second operating parameter is the developed torque of the electric machine 9 which for example, depends on the magnitude and phase direction of the current to the electric machine. The means for detecting the first operating parameter is, for example, a speed sensor connected to the internal combustion engine 2. The means for detecting the second operating parameter is, for example, a control system of the electric machine 9 which provides information on the magnitude and phase direction of the current.
    The method of the invention will be explained in detail with reference to Figures 2 and 3. The steps in the method are controlled by means of the control unit 18.
    Figure 2 shows a method according to a first embodiment of the invention.
    The process begins in a step 210 with receiving information about a requested torque for the operation of the vehicle, a first operating parameter of the internal combustion engine 2 and a second operating parameter of the electric machine 9.
    The requested torque is determined by the user of the vehicle.
    The first operating parameter of the internal combustion engine 2 and the second operating parameter of the electric machine 9 are parameters that affect the fuel consumption of the vehicle in both the release position and the locking position of the planetary gear. Preferably, the first operating parameter is the speed of the internal combustion engine and the second operating parameter is the torque developed from the electric machine 9. In a step 220 it is determined: - if the torque from the internal combustion engine 2 and the electric machine 9 is sufficient for the operation of the vehicle growth in the release position, and - the fuel consumption by means of the planetary gear in the release position or the lock position.
    In a step 230 it is determined whether the following two conditions are met: i) if the torque from the internal combustion engine 2 and the electric machine 9 is sufficient for the operation of the vehicle by the planetary gear in the release position, and ii) if the fuel consumption by the planetary gear in the release position goat is less than the fuel consumption in the lock mode.
    If the two conditions can be answered in the affirmative, the procedure continues to a step 240, where the electric machine 9 and the internal combustion engine 2 are controlled so that the required torque is provided while the planetary gear is in the release position and maintaining the internal combustion engine speed unchanged. If, on the other hand, at least one of the conditions is answered in the negative, the planetary wax is set up in a step 250 in the locked position and the process is terminated.
    Steps 210-240 of the process are iterated until one of the conditions in step 230 is answered in the negative. The procedure can also be interrupted in other ways, such as by order of the user. The alteration of the procedure according to steps 210-240 results in a reduced fuel consumption when driving the vehicle.
    Figure 3 shows a method according to a second embodiment of the invention. The second embodiment differs from the first embodiment by the initial steps of the process.
    The process is initiated in a step 110 with receipt of information about a requested torque for the operation of the vehicle, a first operating parameter of the internal combustion engine 2 and a second operating parameter of the electric machine 9.
    In a step 220, the fuel consumption is determined by means of the planetary gear in the release position and the lock position, respectively. In a step 230 it is determined whether the fuel consumption by means of the planetary gear in the release position is less than in the locked position.
    If the fuel consumption by means of the planetary gear in the release position is less than in the locking position, the planetary gear in the release position is set up in a step 130 and the process is iterated according to steps 210-240 in the same way as in fšg.2. Otherwise, the procedure is terminated.
    In some driving cases, it is more fuel-efficient to drive the vehicle with the planetary gear in the release position. These driving cases are typical when you need low positive or negative driveline torques.
    Energy is then saved by the internal combustion engine 2 being able to run at lower speeds where its friction loss is significantly less.
    Driving with the internal combustion engine 2 at idle and the vehicle driven by the electric machine 9 can also be realized in a parallel hybrid. Compared to the parallel hybrid, the compact hybrid provides a larger available positive torque in the open position. Therefore, driving with low combustion torque can be used in more driving situations.
    The release mode can also be used to skip gear steps during acceleration. Then you go to the release position when it's time to 'upshift' and accelerate a little more with the help of the 16 electric machine's larger speed range and then sink in a higher gear.
    When driving in the release position, the electric machine 9 is controlled and the internal combustion engine 2 is speed controlled towards the lowest speed where the required torque can be obtained. Normally this speed is the same as the engine 2 idle speed which is the lowest possible due to comfort reasons such as vibrations etc.
    Speed control is achieved with a speed controller that regulates the internal combustion engine 2 against the desired speed by means of torque control. In terms of control system, this speed controller is placed close to the actuator in the control system.
    When the planetary gear is set in the release position and the internal combustion engine 2 is driven at its idle speed, two effects are obtained: i) The friction losses in the internal combustion engine 2 decrease due to the speed decrease, ii) The pre-adjusters in the electric machine 9 and energy storage 20 increase total driveline torque is created by the electric machine 9.
    Furthermore, the charge balance in the energy storage 20 changes so that this later must either be recharged or drained in a way that possibly creates more losses than would have been the field if the planetary gear had not been in the release position. These future losses must also be included in the increased electrical losses that are a result of driving with the planetary gear in the release position. It is fuel efficient to drive with the planetary gear in the release position if the reduced losses according to point 1 exceed the increased losses according to point 2.
    Advantages compared to driving electric driving with parallel hybrid and the planetary gear in the release position are as follows: - at positive driveline torques, the internal combustion engine 2 helps with 40% (gear dependence) of the torque even though it operates at idle speed, 17 - the internal combustion engine 2 adds a useful work in the drive system in addition to driving any auxiliary units (type power steering), ~ larger available torque range at positive driveline torques than with the electric machine alone 9, - the exhaust temperatures can be raised by extracting a larger internal combustion engine torque at a low speed which is an advantage for the exhaust after-treatment system, - during braking / brake recovery, the need to supply fuel to the internal combustion engine 2 is reduced as it will be dragged during braking.
    A disadvantage compared to driving electric driving with a parallel hybrid and the planetary gear in the release position is that you can only brake with limited torque in this position if the internal combustion engine 2 is not to spin up in speed.
    The internal combustion engine 2 can also be switched off during this run. It is then braked down to zero speed with a flywheel brake, alternatives are regulated down to zero by temporarily adjusting the electric machine torque with a suitable positive torque. The acceleration of the vehicle can then be simultaneously controlled by the control unit 18 by means of the service brake.
    The invention is not limited to the embodiments shown but can be modified and varied within the scope of the appended claims.
    权利要求:
    Claims (18)
    [1]
    Method for controlling a drive system of a vehicle, the drive system comprises an internal combustion engine (2) with an output shaft (2a), a gearbox (3) with an input shaft (3a), an electric machine (9) comprising a stator (9a) and a rotor (9b), and a planetary gear comprising three components in the form of a sun gear (10), a ring gear (11) and a planet gear holder (12), the output shaft of the internal combustion engine! (Za) is connected to a first of said components of the planetary gear so that a rotation of this shaft leads to a rotation of this component, the input shaft (3a) of the gearbox being connected to a second of said components of the planetary gear so that a rotation of the planetary gear of this shaft leads to a rotation of this component and the rotor (9b) of the electric machine is connected to a third of said components of the planetary gear so that a rotation of the rotor leads to a rotation of this component, and wherein the drive system further comprises lockable means transferable between a locking position in which two of said components are locked together so that the three components (10-12) rotate at the same speed and a release position in which the components are allowed to rotate at different speeds, characterized in that the method comprises iterating steps a) -d) , a) information on a requested torque for the operation of the vehicle, at least a first operating parameter of the internal combustion engine (2) and at least a second a operating parameter of the electric machine (9) is received, b) whether the available torque from the internal combustion engine (2) and the electric machine (9) is sufficient to achieve the required torque by the planetary wax in the release position is determined, c) the vehicle's fuel consumption at the planetary gear in the release position and in the toe position it is determined on the basis of the first and the second operating parameter, d) whether torque from the internal combustion engine (2) and the electric machine (9) is sufficient to achieve the requested torque by means of the planetary gear in the release position, and if the vehicle's fuel consumption by means of the planetary gear in the release position is lower than in the locked position, the electric machine (9) and the internal combustion engine (2) are controlled so that the required torque is provided while the planetary gear is in the release position, otherwise the planetary gear in the lock mode and the procedure ends.
    [2]
    A method for controlling a drive system according to claim 1, wherein the method begins with the steps of: - receiving information about a first operating parameter of the internal combustion engine (2) and a second operating parameter of the electric machine (9), - the vehicle's. fuel consumption by means of the planetary gear unit in the release position and in the locking position is determined on the basis of the first and the second operating parameter, - whether the vehicle's fuel consumption by means of. the planetary gear in the release position is lower than in the locking position, the planetary gear is set in the release position and steps a) -d) are iterated.
    [3]
    A method of controlling a drive system according to any one of claims 1 and 2, wherein the electric machine (9) is controlled with respect to one of a torque and a speed, and the internal combustion engine (2) is controlled with respect to the second of the torque and speed.
    [4]
    A method for controlling a drive system according to any one of the preceding claims, wherein the internal combustion engine (2) is controlled so that the speed of the internal combustion engine is minimized with respect to a torque requested by the internal combustion engine (2).
    [5]
    A method of controlling a drive system according to any one of the preceding claims, wherein the internal combustion engine (2) is controlled to an idle speed. - 10 15 20 25 30 35 '20
    [6]
    A method for controlling a drive system according to any one of the preceding claims, wherein the first operating parameter is the speed of the internal combustion engine. in
    [7]
    A method of controlling a drive system according to any one of the preceding claims, wherein the second operating parameter is the developed torque of the electrical machine.
    [8]
    A method of controlling a drive system according to any one of the preceding claims, wherein whether the torque from the internal combustion engine (2) is sufficient for the operation of the vehicle at the planetary gear E the release position is determined from [developed torque from the internal combustion engine, (2) x gear ratio ] and whether the torque from the electric machine (9) is sufficient for the operation of the vehicle at the planetary gear in the release position is determined from [developed torque from the electric machine (9) x [1 - gear ratio fl, where the gear ratio is given by the ratio between the number of teeth of the sun gear (10) and [the number of teeth of the ring gear (11) + the number of teeth of the sun wheel (10)].
    [9]
    A method of controlling a drive system according to any one of the preceding claims, wherein the gearbox (3) comprises at least a first gear with a first lowest torque, a second gear with a second lowest torque, and a third gear with a third lowest torque, wherein the first lowest torque is lower than the second lowest torque and the second lowest torque is lower than the third lowest torque, the method comprising: - the planetary gear is set in the release position while the gearbox (3) is arranged in the first gear, - the torque of the operating system is increased from at least the second lowest torque to at least the third lowest torque by controlling the internal combustion engine (2) and the electric machine (9) while maintaining the speed of the internal combustion engine (2), - the gearbox (3) is shifted from the first gear to the third the gear unit, and - the planetary gear unit is set up in the locked position and the procedure is completed. 10 15 20 25 30 35 21
    [10]
    A method of controlling a drive system according to any one of the preceding claims, wherein the locking means is adapted to engage the ring gear (11) and the planetary wheel helper (12) in the locking position so that they rotate together, the change from the locking position and the release position comprises: the machine (9) and the internal combustion engine (2) are steered to a mutually morph-free state, and - the locking means is released from engagement with the ring gear (11) and the planet wheel holder (12) so that the ring wheel (11) and the planet wheel holder (12) are freely rotatable in relation to eachother.
    [11]
    Method for controlling a drive system according to any one of the preceding claims, wherein the locking means is adapted to interconnect the ring gear (11) and the planetary gear holder (12) in the locking position so that they rotate together, the change from the release position to the lock position comprises: (9) and the internal combustion engine (2) is controlled to a mutually torque-free state, and - the locking means is displaced into engagement with the ring gear (11) and the planetary gear holder (12).
    [12]
    A method of controlling a drive system according to any one of the preceding claims, wherein the output shaft (Za) of the internal combustion engine is connected to the sun gear (10) so that they rotate as a unit with a first speed (n1), that the input shaft (3a) of the gearbox ) are connected to the planet gear holder (12) so that they rotate as a unit at a second speed (ng), and that the rotor (9b) of the electric machine is connected to the ring gear (11) so that the ring wheel (11) rotates at a third speed (m3).
    [13]
    The propulsion system for a vehicle, the propulsion system comprises an internal combustion engine (2) with an output shaft (Za), a gearbox (3) with an input shaft (3a), an electric machine (9) comprising a stator ( 9a) and a rotor (9b), and a planetary gear comprising three components in the form of a soy wheel (10), a ring gear 10 and a planet gear holder (12), the output shaft of the internal combustion engine (2a) are connected to a first of said components of the planetary gear so that a rotation of this axis leads to a rotation of this component, the input shaft (Sa) of the gearbox being connected to a second of said components of the planetary gear the planetary gear so that a rotation of this shaft leads to a rotation of this component and the rotor (9b) of the electric machine is connected to a third of said components of the planetary gear so that a rotation of the rotor leads to a rotation of this component, and wherein the drive system in addition, locking means include transferable intermediates a locking position in which two of said components are locked together so that the three components (10-12) rotate at the same speed and a release position in which the components are allowed to rotate at different speeds, characterized in that the drive system comprises a control unit (18) adapted that if the torque from the internal combustion engine (2) and the electric machine (9) is sufficient for the operation of the vehicle by means of the planetary gear in the release position, and if the vehicle's fuel consumption by means of the planetary gear in the release position is lower than in the locked position, control the electric machine (9) and the internal combustion engine (2) so that the required torque is provided while the planetary gear is in the release position and while maintaining the speed of the internal combustion engine.
    [14]
    A drive system for a vehicle according to any one of claims 13, wherein the drive system comprises means for controlling the speed of the internal combustion engine (2).
    [15]
    A drive system for a vehicle according to any one of claims 13-14, wherein the drive system comprises means for controlling the torque of the electric machine (9).
    [16]
    A computer program comprising computer program code for causing a computer to implement a method according to any one of claims 1-12 when the computer program code is executed in the computer. 23
    [17]
    A computer program product comprising a computer storage medium readable by a computer, wherein the computer program code of a computer program according to claim 16 is stored on the data storage medium.
    [18]
    Vehicle comprising a drive system according to any one of claims 13-15.
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    同族专利:
    公开号 | 公开日
    KR101739525B1|2017-05-24|
    RU2631358C2|2017-09-21|
    WO2014003673A1|2014-01-03|
    EP2867089A4|2016-05-25|
    KR20150024902A|2015-03-09|
    IN2014DN10727A|2015-09-04|
    EP2867089A1|2015-05-06|
    CN104507778B|2017-05-03|
    US20150239459A1|2015-08-27|
    BR112014031906A2|2017-06-27|
    US9333967B2|2016-05-10|
    CN104507778A|2015-04-08|
    RU2015102290A|2016-08-10|
    SE536640C2|2014-04-22|
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    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    SE1250708A|SE536640C2|2012-06-27|2012-06-27|Process for controlling a vehicle's drive system, drive system, computer program, computer software product and vehicle|SE1250708A| SE536640C2|2012-06-27|2012-06-27|Process for controlling a vehicle's drive system, drive system, computer program, computer software product and vehicle|
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    KR1020157001662A| KR101739525B1|2012-06-27|2013-06-26|Method for controlling a drive system of a vehicle, a drive system, a computer program, a computer program product and a vehicle|
    EP13810445.0A| EP2867089A4|2012-06-27|2013-06-26|Method for controlling a drive system of a vehicle, a drive system, a computer program, a computer program product and a vehicle|
    US14/411,131| US9333967B2|2012-06-27|2013-06-26|Method for controlling a drive system of a vehicle, a drive system, a computer program, a computer program product and a vehicle|
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