WO2012101802A1 - 車両および車両用制御方法 - Google Patents
車両および車両用制御方法 Download PDFInfo
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- WO2012101802A1 WO2012101802A1 PCT/JP2011/051582 JP2011051582W WO2012101802A1 WO 2012101802 A1 WO2012101802 A1 WO 2012101802A1 JP 2011051582 W JP2011051582 W JP 2011051582W WO 2012101802 A1 WO2012101802 A1 WO 2012101802A1
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- vehicle
- speed
- engine
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- internal combustion
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W30/00—Purposes of road vehicle drive control systems not related to the control of a particular sub-unit, e.g. of systems using conjoint control of vehicle sub-units, or advanced driver assistance systems for ensuring comfort, stability and safety or drive control systems for propelling or retarding the vehicle
- B60W30/18—Propelling the vehicle
- B60W30/192—Mitigating problems related to power-up or power-down of the driveline, e.g. start-up of a cold engine
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K6/00—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00
- B60K6/20—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs
- B60K6/42—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by the architecture of the hybrid electric vehicle
- B60K6/44—Series-parallel type
- B60K6/445—Differential gearing distribution type
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W10/00—Conjoint control of vehicle sub-units of different type or different function
- B60W10/04—Conjoint control of vehicle sub-units of different type or different function including control of propulsion units
- B60W10/06—Conjoint control of vehicle sub-units of different type or different function including control of propulsion units including control of combustion engines
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W10/00—Conjoint control of vehicle sub-units of different type or different function
- B60W10/04—Conjoint control of vehicle sub-units of different type or different function including control of propulsion units
- B60W10/08—Conjoint control of vehicle sub-units of different type or different function including control of propulsion units including control of electric propulsion units, e.g. motors or generators
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W10/00—Conjoint control of vehicle sub-units of different type or different function
- B60W10/10—Conjoint control of vehicle sub-units of different type or different function including control of change-speed gearings
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W10/00—Conjoint control of vehicle sub-units of different type or different function
- B60W10/18—Conjoint control of vehicle sub-units of different type or different function including control of braking systems
- B60W10/184—Conjoint control of vehicle sub-units of different type or different function including control of braking systems with wheel brakes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W20/00—Control systems specially adapted for hybrid vehicles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W2540/00—Input parameters relating to occupants
- B60W2540/06—Ignition switch
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/62—Hybrid vehicles
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S903/00—Hybrid electric vehicles, HEVS
- Y10S903/902—Prime movers comprising electrical and internal combustion motors
- Y10S903/903—Prime movers comprising electrical and internal combustion motors having energy storing means, e.g. battery, capacitor
- Y10S903/93—Conjoint control of different elements
Definitions
- the present invention relates to control of a vehicle on which a rotating electric machine and an internal combustion engine are mounted.
- Patent Document 1 Japanese Patent Application Laid-Open No. 2007-23919
- the brake pedal is depressed when the push switch is pressed.
- a technique for restarting the engine even if it is not disclosed is disclosed.
- An object of the present invention is to provide a vehicle and a vehicle control method for controlling an engine to a restartable state when an engine stop instruction is received during high-speed traveling.
- a vehicle includes a drive wheel, an internal combustion engine, a first rotating electrical machine (20) for starting the internal combustion engine, and power transmission coupled between the first rotating electrical machine and the drive wheel.
- An apparatus an input unit for receiving any one of a stop instruction and a start instruction for a vehicle system from a driver, and a control unit for controlling the vehicle in accordance with an instruction from the input unit.
- the control unit receives a stop instruction from the input unit while the vehicle is running, the control unit prohibits the restart of the internal combustion engine while the vehicle speed is higher than the threshold value, and the vehicle speed exceeds the threshold value. Allow the internal combustion engine to restart after dropping.
- the vehicle further includes a power storage device for exchanging electric power with the first rotating electrical machine.
- the first rotating electrical machine generates power when starting the internal combustion engine in a stopped state while the vehicle is traveling.
- the vehicle further includes a braking device for limiting the rotation of the drive wheels using frictional force.
- the control unit controls the braking device to reduce the speed of the vehicle using the frictional force when the input unit receives a stop instruction while the vehicle is traveling.
- the power transmission device includes an automatic transmission.
- the control unit controls the automatic transmission so as to decrease the speed of the vehicle by increasing the gear ratio of the automatic transmission when the input unit receives a stop instruction while the vehicle is running.
- the vehicle further includes a second rotating electric machine for limiting the rotation of the drive wheels using the motor torque.
- the control unit controls the second rotating electrical machine so as to reduce the speed of the vehicle using the motor torque when the input unit receives a stop instruction while the vehicle is traveling.
- the vehicle further includes a drive shaft for rotating the drive wheels.
- the power transmission device mechanically connects each of the three elements of the drive shaft, the output shaft of the internal combustion engine, and the rotation shaft of the first rotating electrical machine, and uses any one of the three elements as a reaction force element. , Allowing power transmission between the other two elements.
- the power transmission device includes a clutch for switching a state between the first rotating electric machine and the drive wheel between a power transmission state and a power cutoff state.
- a vehicle control apparatus includes a drive wheel, an internal combustion engine, a first rotating electrical machine for starting the internal combustion engine, and power coupled between the first rotating electrical machine and the drive wheel.
- the restart of the internal combustion engine when a stop instruction is received while the vehicle is traveling, the restart of the internal combustion engine is permitted after the vehicle speed is reduced, so that when the stop instruction is received while the vehicle is traveling, the vehicle speed is increased.
- the threshold value By prohibiting restart of the internal combustion engine while it is higher than the threshold value, power generation of the first rotating electrical machine when starting the internal combustion engine can be suppressed.
- the restart of the internal combustion engine after the vehicle speed falls below the threshold value the increase in the rotation speed of the first rotating electric machine when the rotation speed of the internal combustion engine is increased during the restart of the internal combustion engine. The amount can be made smaller than when the vehicle speed does not decrease.
- the power generation amount in the first rotating electrical machine when the internal combustion engine is restarted can be made smaller than when the vehicle speed does not decrease. That is, the first rotating electrical machine can be operated within the range of input power allowed in the power storage device. As a result, the internal combustion engine can be restarted immediately. Therefore, it is possible to provide a vehicle and a vehicle control method for controlling the engine to a restartable state when an engine stop instruction is received during high-speed traveling.
- FIG. 6 is a collinear diagram (No. 1) for describing the operation of the vehicle in the present embodiment; It is a functional block diagram of ECU mounted in the vehicle which concerns on this Embodiment. It is a figure which shows the flowchart of the program performed with ECU mounted in the vehicle which concerns on this Embodiment.
- FIG. 6 is a collinear diagram (No. 2) for describing the operation of the vehicle in the present embodiment. It is a figure which shows the structural example of another vehicle.
- the vehicle 1 includes an engine 10, a drive shaft 16, a first motor generator (hereinafter referred to as a first MG) 20, a second motor generator (hereinafter referred to as a second MG) 30, and a power split device 40. , A reduction gear 58, a PCU (Power Control Unit) 60, a battery 70, a drive wheel 80, a start switch 150, and an ECU (Electronic Control Unit) 200.
- a first MG first motor generator
- a second motor generator hereinafter referred to as a second MG
- a reduction gear 58 A reduction gear 58, a PCU (Power Control Unit) 60, a battery 70, a drive wheel 80, a start switch 150, and an ECU (Electronic Control Unit) 200.
- the vehicle 1 travels by driving force output from at least one of the engine 10 and the second MG 30.
- the power generated by the engine 10 is divided into two paths by the power split device 40.
- One of the two routes is a route transmitted to the drive wheel 80 via the speed reducer 58, and the other route is a route transmitted to the first MG 20.
- the first MG 20 and the second MG 30 are, for example, three-phase AC rotating electric machines.
- First MG 20 and second MG 30 are driven by PCU 60.
- the first MG 20 has a function as a generator that generates power using the power of the engine 10 divided by the power split device 40 and charges the battery 70 via the PCU 60. Further, first MG 20 receives electric power from battery 70 and rotates a crankshaft that is an output shaft of engine 10. Thus, the first MG 20 has a function as a starter for starting the engine 10.
- the second MG 30 has a function as a driving motor that applies driving force to the driving wheels 80 using at least one of the electric power stored in the battery 70 and the electric power generated by the first MG 20. Second MG 30 also has a function as a generator for charging battery 70 via PCU 60 using electric power generated by regenerative braking.
- the engine 10 is an internal combustion engine such as a gasoline engine or a diesel engine.
- the engine 10 includes a plurality of cylinders 102 and a fuel injection device 104 that supplies fuel to each of the plurality of cylinders 102. Based on the control signal S1 from the ECU 200, the fuel injection device 104 injects an appropriate amount of fuel to each cylinder at an appropriate time, or stops fuel injection to each cylinder.
- the engine 10 is provided with an engine rotation speed sensor 11 for detecting the rotation speed of the crankshaft of the engine 10 (hereinafter referred to as engine rotation speed) Ne.
- the engine rotation speed sensor 11 transmits a signal indicating the detected engine rotation speed Ne to the ECU 200.
- the power split device 40 mechanically connects each of the three elements of the drive shaft 16 for rotating the drive wheels 80, the output shaft of the engine 10, and the rotary shaft of the first MG 20.
- the power split device 40 enables transmission of power between the other two elements by using any one of the three elements described above as a reaction force element.
- the rotation shaft of second MG 30 is connected to drive shaft 16.
- the power split device 40 is a planetary gear mechanism including a sun gear 50, a pinion gear 52, a carrier 54, and a ring gear 56.
- Pinion gear 52 meshes with each of sun gear 50 and ring gear 56.
- the carrier 54 supports the pinion gear 52 so as to be capable of rotating, and is connected to the crankshaft of the engine 10.
- Sun gear 50 is coupled to the rotation shaft of first MG 20.
- Ring gear 56 is coupled to the rotation shaft of second MG 30 and reduction gear 58 via drive shaft 16.
- Reduction gear 58 transmits power from power split device 40 and second MG 30 to drive wheels 80. Reducer 58 transmits the reaction force from the road surface received by drive wheels 80 to power split device 40 and second MG 30.
- PCU 60 converts the DC power stored in battery 70 into AC power for driving first MG 20 and second MG 30.
- PCU 60 includes a converter and an inverter (both not shown) controlled based on control signal S2 from ECU 200.
- the converter boosts the voltage of the DC power received from battery 70 and outputs it to the inverter.
- the inverter converts the DC power output from the converter into AC power and outputs the AC power to first MG 20 and / or second MG 30.
- first MG 20 and / or second MG 30 are driven using the electric power stored in battery 70.
- the inverter converts AC power generated by the first MG 20 and / or the second MG 30 into DC power and outputs the DC power to the converter.
- the converter steps down the voltage of the DC power output from the inverter and outputs the voltage to battery 70. Thereby, battery 70 is charged using the electric power generated by first MG 20 and / or second MG 30.
- the converter may be omitted.
- the battery 70 is a power storage device and a rechargeable DC power source.
- a secondary battery such as nickel metal hydride or lithium ion is used.
- the voltage of the battery 70 is about 200V, for example.
- Battery 70 may be charged using electric power supplied from an external power source (not shown) in addition to being charged using electric power generated by first MG 20 and / or second MG 30 as described above.
- the battery 70 is not limited to a secondary battery, but may be a battery capable of generating a DC voltage, such as a capacitor, a solar battery, or a fuel battery.
- the battery 70 includes a battery temperature sensor 156 for detecting the battery temperature TB of the battery 70, a current sensor 158 for detecting the current IB of the battery 70, and a voltage sensor 160 for detecting the voltage VB of the battery 70. And are provided.
- the battery temperature sensor 156 transmits a signal indicating the battery temperature TB to the ECU 200.
- Current sensor 158 transmits a signal indicating current IB to ECU 200.
- Voltage sensor 160 transmits a signal indicating voltage VB to ECU 200.
- the start switch 150 is, for example, a push-type switch.
- the start switch 150 may be configured to insert a key into a key cylinder and rotate it to a predetermined position.
- Start switch 150 is connected to ECU 200.
- the start switch 150 transmits a signal ST to the ECU 200.
- the ECU200 judges that it received the start instruction, for example, when signal ST is received when the system of vehicle 1 is a stop state, and makes the system of vehicle 1 shift from a stop state to a start state. Further, when the signal ST is received when the system of the vehicle 1 is in the activated state, the ECU 200 determines that a stop instruction has been received, and shifts the system of the vehicle 1 from the activated state to the stopped state.
- the operation of the start switch 150 by the driver when the system of the vehicle 1 is in the activated state is referred to as an IG off operation, and the driver operates the start switch 150 when the system of the vehicle 1 is in the stopped state.
- the operation is called IG on operation.
- the plurality of devices are in an operable state by supplying power to the plurality of devices necessary for the vehicle 1 to travel.
- some devices are stopped by supplying power to some of the plurality of devices necessary for the vehicle 1 to travel. Will stop operating.
- the first resolver 12 detects the rotational speed Nm1 of the first MG 20.
- the first resolver 12 transmits a signal indicating the detected rotation speed Nm1 to the ECU 200.
- the second resolver 13 detects the rotational speed Nm2 of the second MG 30.
- the second resolver 13 transmits a signal indicating the detected rotation speed Nm2 to the ECU 200.
- the wheel speed sensor 14 detects the rotational speed Nw of the drive wheel 80.
- the wheel speed sensor 14 transmits a signal indicating the detected rotation speed Nw to the ECU 200.
- the ECU 200 calculates a speed (hereinafter also referred to as a vehicle speed) V of the vehicle 1 based on the received rotational speed Nw.
- ECU 200 may calculate vehicle speed V based on rotation speed Nm2 of second MG 30 instead of rotation speed Nw.
- the braking device 151 includes a brake actuator 152 and a disc brake 154.
- the disc brake 154 includes a brake disc that rotates integrally with the wheel, and a brake caliper that restricts rotation of the brake disc using hydraulic pressure.
- the brake caliper includes a brake pad provided so as to sandwich the brake disc in a direction parallel to the rotation shaft, and a wheel cylinder for transmitting hydraulic pressure to the brake pad.
- the disc brake 154 limits the rotation of the brake disc (wheel) using a frictional force generated between the brake disc and the brake pad due to an increase in hydraulic pressure.
- the brake actuator 152 Based on the control signal S3 received from the ECU 200, the brake actuator 152 adjusts the hydraulic pressure generated when the driver depresses the brake pedal and the hydraulic pressure generated using a pump, a solenoid valve, and the like, and supplies the hydraulic pressure to the wheel cylinder. Adjust the hydraulic pressure.
- the braking device 151 is illustrated only on the right side of the rear wheel, but the braking device 151 is provided for each wheel.
- the ECU 200 generates a control signal S1 for controlling the engine 10 and outputs the generated control signal S1 to the engine 10.
- ECU 200 also generates a control signal S2 for controlling PCU 60 and outputs the generated control signal S2 to PCU 60.
- ECU 200 generates a control signal S3 for controlling brake actuator 152, and outputs the generated control signal S3 to brake actuator 152.
- the ECU 200 controls the entire hybrid system, that is, the charging / discharging state of the battery 70 and the operating states of the engine 10, the first MG 20 and the second MG 30 so that the vehicle 1 can operate most efficiently by controlling the engine 10, the PCU 60, and the like. .
- ECU 200 calculates a required driving force corresponding to the amount of depression of an accelerator pedal (not shown) provided in the driver's seat. ECU 200 controls the torque of first MG 20 and second MG 30 and the output of engine 10 in accordance with the calculated required driving force.
- the vehicle 1 when the engine 10 is inefficient at the time of starting or running at a low speed, the vehicle 1 travels only by the second MG 30. Further, during normal travel, for example, the power split device 40 divides the power of the engine 10 into two paths of power.
- the drive wheel 80 is directly driven by one power.
- the first MG 20 is driven with the other power to generate power.
- ECU 200 drives second MG 30 using the generated electric power. In this way, driving of the driving wheel 80 is performed by driving the second MG 30.
- the second MG 30 driven by the rotation of the drive wheel 80 functions as a generator to perform regenerative braking.
- the electric power recovered by regenerative braking is stored in the battery 70.
- ECU 200 increases the output of engine 10 to increase the first MG 20 when the remaining capacity of the power storage device (described in the following description as SOC (State of Charge)) decreases and charging is particularly necessary. Increase the amount of power generated by Thereby, the SOC of the battery 70 is increased.
- the ECU 200 may perform control to increase the driving force from the engine 10 as necessary even during low-speed traveling. For example, the battery 70 needs to be charged as described above, an auxiliary machine such as an air conditioner is driven, or the temperature of the cooling water of the engine 10 is raised to a predetermined temperature.
- the ECU 200 determines the input power allowed when the battery 70 is charged based on the battery temperature TB and the current SOC (in the following description, “charging power upper limit value”). Output power (to be described as “discharge power upper limit value Wout” in the following description). For example, when the current SOC decreases, discharge power upper limit Wout is set to be gradually lower. On the other hand, when the current SOC increases, charging power upper limit value Win is set to gradually decrease.
- the secondary battery used as the battery 70 has a temperature dependency in which the internal resistance increases at a low temperature. Further, at a high temperature, it is necessary to prevent the temperature from excessively rising due to further heat generation. For this reason, it is preferable to reduce each of the discharge power upper limit value Wout and the charge power upper limit value Win when the battery temperature TB is low and high. ECU 200 sets charge power upper limit value Win and discharge power upper limit value Wout by using, for example, a map or the like according to battery temperature TB and the current SOC.
- the engine 10 when the engine 10 is stopped for some reason during high speed traveling, the engine may not be restarted immediately.
- a case is assumed in which the vehicle 1 is traveling at a high speed as indicated by a solid line described in the alignment chart of FIG.
- the left vertical axis of the three vertical axes in the collinear chart shown in FIG. 2 indicates the rotational speed of the sun gear 50, that is, the rotational speed Nm1 of the first MG 20.
- the vertical axis at the center of the alignment chart shown in FIG. 2 indicates the rotational speed of the carrier 54, that is, the engine rotational speed Ne.
- the vertical axis on the right side of the alignment chart shown in FIG. 2 indicates the rotational speed of the ring gear 56, that is, the rotational speed Nm2 of the second MG 30.
- shaft of the alignment chart of FIG. 2 shows a normal rotation direction, and the direction opposite to the arrow direction shows a negative rotation direction.
- the rotational speed Nm1 of the first MG 20 When the vehicle 1 travels, the rotational speed Nm1 of the first MG 20, the engine rotational speed Ne, and the rotational speed Nm2 of the second MG 30 maintain a relationship that is connected by a single straight line on the alignment chart of FIG. Thus, the rotational speeds Nm1, Ne, and Nm2 of the elements change.
- the rotational speed Nm1 of the first MG 20 is Nm1 (0)
- the engine rotational speed Ne is Ne (0)
- the rotational speed Nm2 of the second MG 30 is Nm2 (0).
- the first MG 20 generates power in the process of increasing the rotation speed of the first MG 20 from Nm1 (1) to Nm1 (0). Therefore, when charging is limited due to the SOC of battery 70 being higher than the normal SOC range, that is, when charging power upper limit Win is lower than when SOC is within the normal SOC range. The first MG 20 may not be able to generate power. As a result, the engine may not be restarted immediately.
- ECU 200 when ECU 200 receives a stop instruction from start switch 150 while vehicle 1 is traveling, engine 10 is in a state where the speed of vehicle 1 is higher than threshold value V (1). The restart is prohibited, and the restart of the engine 10 is permitted after the speed of the vehicle 1 falls below the threshold value V (1).
- FIG. 3 shows a functional block diagram of ECU 200 mounted on vehicle 1 according to the present embodiment.
- ECU 200 includes a determination unit 202, a vehicle speed determination unit 204, a fuel cut control unit 206, a determination unit 208, a deceleration control unit 210, a start determination unit 212, a first MG control unit 214, and an engine control unit 216. including.
- the determination unit 202 determines whether or not the IG off operation has been performed.
- the determination unit 202 determines that the IG OFF operation has been performed when the signal ST is received from the start switch 150 when the system of the vehicle 1 is in the activated state. For example, the determination unit 202 may turn on an IG off determination flag when an IG off operation is performed.
- the determination unit 202 determines whether or not the vehicle 1 is traveling. The determination unit 202 determines that the vehicle 1 is traveling when the vehicle speed V is higher than the predetermined vehicle speed V (0). Note that the determination unit 202 may turn on the travel determination flag when it is determined that the vehicle 1 is traveling.
- the vehicle speed determination unit 204 determines whether or not the vehicle speed V is lower than the threshold value V (1).
- the threshold value V (1) is an upper limit value of the speed at which the engine 10 can be restarted. Threshold value V (1) may be a predetermined value or a value set according to the state of vehicle 1 (for example, charging power upper limit value Win). The threshold value V (1) may be the same value as the predetermined vehicle speed V (0) described above, or may be a different value.
- the vehicle speed determination unit 204 determines whether or not the vehicle speed V is lower than the threshold value V (1) when both the IG off determination flag and the travel determination flag are on. The vehicle speed determination unit 204 turns on the vehicle speed determination flag when it is determined that the vehicle speed V is lower than the threshold value V (1).
- the fuel cut control unit 206 executes fuel cut control for stopping fuel injection to the cylinder 102 when the determination unit 202 determines that the IG-off operation is performed and the vehicle 1 is determined to be traveling.
- the fuel cut control unit 206 generates a control signal S1 indicating that fuel cut control is to be executed, and transmits the generated control signal S1 to the engine 10. Note that the fuel cut control unit 206 may execute the fuel cut control when, for example, both the IG off determination flag and the travel determination flag are in the on state.
- the determination unit 208 determines permission to restart the engine 10 when the vehicle speed determination unit 204 determines that the vehicle speed V is lower than the threshold value V (1).
- the determination unit 208 determines prohibition of restart of the engine 10 when the vehicle speed determination unit 204 determines that the vehicle speed V is equal to or higher than the threshold value V (1).
- the start permission unit 208 permits the start when the vehicle speed determination unit 204 determines that the vehicle speed V is lower than the threshold value V (1) (when the vehicle speed determination flag is turned on).
- the start permission flag may be turned off when the flag is turned on and it is determined that the vehicle speed V is equal to or higher than the threshold value V (1).
- the deceleration control unit 210 performs deceleration control for reducing the speed of the vehicle 1 when the vehicle speed determination unit 204 determines that the vehicle speed V is equal to or higher than the threshold value V (1).
- the deceleration control unit 210 uses the friction force to reduce the speed of the vehicle 1. May be controlled. Specifically, when the vehicle speed determination unit 204 determines that the vehicle speed V is equal to or higher than the threshold value V (1), the deceleration control unit 210 increases the brake actuator so that the hydraulic pressure supplied to the wheel cylinder increases. 152 is controlled.
- the deceleration control unit 210 when the vehicle speed determination unit 204 determines that the vehicle speed V is equal to or higher than the threshold value V (1), the deceleration control unit 210 generates a motor torque in the negative rotation direction to increase the speed of the vehicle 1. You may make it control 2nd MG30 so that it may reduce.
- the vehicle 1 is decelerated using the second MG 30, it is desirable that the vehicle 1 is decelerated by operating the second MG 30 within a range of input power allowed in the battery 70 in order to generate power by regenerative braking.
- the speed reduction control unit 210 determines that the vehicle speed V is equal to or higher than the threshold value V (1) in the vehicle speed determination unit 204. In such a case, the speed of the vehicle 1 is automatically reduced by increasing the speed ratio of the automatic transmission (the output shaft rotational speed of the automatic transmission / the input shaft rotational speed of the automatic transmission).
- the transmission may be controlled.
- deceleration control unit 210 may execute deceleration control when the vehicle speed determination flag (or start permission flag) is off, for example.
- the deceleration control unit 210 ends the deceleration control when the vehicle speed determination unit 204 determines that the vehicle speed V is lower than the threshold value V (1).
- the start determination unit 212 determines whether or not there is a request for restart of the engine 10 when the start permission unit 208 permits the restart of the engine 10.
- the start determination unit 212 determines that there is a request to restart the engine 10, for example, when the driver performs an IG-on operation after the restart of the engine 10 is permitted.
- the start determination unit 212 determines, for example, whether there is a request for restarting the engine 10 when the start permission flag is on, and determines that there is a request for restart of the engine 10. In this case, the restart request flag may be turned on.
- the first MG control unit 214 when the start determination unit 212 determines that there is a request for restarting the engine 10, causes the first MG 20 to generate a torque in the forward rotation direction, and to start the engine rotation speed Ne. Increase to rotational speed.
- the rotational speed necessary for starting is not particularly limited as long as the rotational speed is higher than the minimum rotational speed at which the first explosion is possible.
- the first MG control unit 214 may control the first MG control unit 214 so that, for example, the torque in the forward rotation direction is generated in the first MG 20 when the restart request flag is turned on.
- the first MG control unit 214 generates a control signal S2 for causing the first MG 20 to generate torque in the forward rotation direction, and transmits the control signal S2 to the PCU 60.
- the engine control unit 216 ends the fuel cut control and executes the fuel injection control when the engine rotation speed Ne becomes higher than the rotation speed necessary for starting using the torque of the first MG 20.
- Engine 10 is restarted by combustion of a mixture of fuel and air in cylinder 102.
- the ignition control may be stopped together with the fuel cut control, and the ignition control may be restarted together with the fuel injection control. Alternatively, the ignition control is continued until the vehicle 1 stops. May be executed.
- determination unit 202 determination unit 202, vehicle speed determination unit 204, fuel cut control unit 206, determination unit 208, deceleration control unit 210, start determination unit 212, first MG control unit 214, and engine control
- the unit 216 is described as functioning as software that is realized by the CPU of the ECU 200 executing a program stored in the memory, but may be realized by hardware. Such a program is recorded on a storage medium and mounted on the vehicle.
- step (hereinafter, step is referred to as S) 100 ECU 200 determines whether or not an IG off operation has been performed. If the IG off operation has been performed (YES in S100), the process proceeds to S102. If not (NO in S100), the process returns to S100.
- ECU 200 determines whether or not vehicle 1 is traveling. The ECU 200 determines that the vehicle 1 is traveling when the vehicle speed V of the vehicle 1 is higher than the predetermined vehicle speed V (0). If vehicle 1 is traveling (YES in S102), the process proceeds to S104. If not (NO in S102), the process returns to S100.
- the ECU 200 executes fuel cut control.
- ECU 200 determines whether or not vehicle speed V is lower than threshold value V (1). If vehicle speed V is lower than threshold value V (1) (YES in S106), the process proceeds to S108. If not (NO in S106), the process proceeds to S116.
- the ECU 200 permits the engine 10 to be restarted.
- ECU 200 determines whether or not an IG ON operation has been performed. If IG-on operation has been performed (YES in S110), the process proceeds to S112. If not (NO in S110), the process returns to S110.
- ECU 200 controls first MG 20 so that engine rotation speed Ne is increased to a rotation speed necessary for starting. Since the control contents of first MG 20 are as described above, detailed description thereof will not be repeated.
- ECU 200 controls engine 10 to execute fuel injection control when engine rotation speed Ne is higher than the rotation speed necessary for starting using the torque of first MG 20.
- ECU 200 prohibits restart of the engine.
- ECU 200 executes deceleration control for reducing the speed of vehicle 1. Since the details of the deceleration control are as described above, detailed description thereof will not be repeated.
- ECU 200 determines whether or not vehicle speed V is lower than threshold value V (1). If vehicle speed V is lower than threshold value V (1) (YES in S120), the process proceeds to S122. If not (NO in S110), the process returns to S120. In S122, ECU 200 ends the deceleration control, and the process proceeds to S108.
- ECU 200 mounted on vehicle 1 based on the above-described structure and flowchart will be described with reference to the alignment chart of FIG. Since elements indicating the respective axes of the nomograph are the same as those of the nomograph of FIG. 2, the detailed description thereof will not be repeated.
- the rotational speed Nm1 of the first MG 20 is Nm1 (2)
- the engine rotational speed Ne is Ne (1)
- the rotational speed Nm2 of the second MG 30 is Nm2 (1).
- first MG 20 is controlled so that torque in the forward rotation direction is generated in first MG 20 (S112).
- the rotational speed Nm1 of the first MG 20 increases in the forward rotation direction.
- the rotational speed Nm1 of the first MG 20 increases in the forward rotational direction
- the rotational speed Ne increases.
- fuel injection control is executed (S114), and the engine 10 is restarted.
- the engine when the stop instruction is received by start switch 150 while vehicle 1 is traveling, the engine is maintained while vehicle speed V is higher than threshold value V (1).
- the power generation of the first MG 20 when the engine is started in response to the IG-on operation can be suppressed.
- the rotational speed Nm1 of the first MG 20 when the engine rotational speed Ne is increased when the engine 10 is restarted Can be made smaller than when the vehicle speed V is equal to or higher than the threshold value V (1).
- first MG 20 can be operated within the range of input power allowed in battery 70.
- the engine 10 can be restarted immediately. Therefore, it is possible to provide a vehicle and a vehicle control method for controlling the engine to a restartable state when an engine stop instruction is received during high-speed traveling. Moreover, since it is suppressed that the battery 70 is charged exceeding the allowable input power, deterioration of the battery 70 can be prevented.
- the ECU 200 has been described as one ECU, but two or more ECUs may be used.
- the operation of ECU 200 in FIG. 1 may be shared between an engine ECU for controlling engine 10 and a hybrid ECU for controlling PCU 60.
- the vehicle 1 having the driving wheel 80 as the front wheel is shown as an example, but the driving method is not particularly limited thereto.
- the vehicle 1 may have a rear wheel as a driving wheel.
- the vehicle 1 may be a vehicle in which the second MG 30 in FIG. 1 is omitted.
- vehicle 1 may be a vehicle in which second MG 30 in FIG. 1 is coupled to a drive shaft for driving rear wheels instead of front wheel drive shaft 16.
- a speed change mechanism may be provided between drive shaft 16 and speed reducer 58 or between drive shaft 16 and second MG 30.
- the vehicle 1 may have a configuration as shown in FIG. Specifically, the vehicle 1 shown in FIG. 6 does not have the second MG 30 and the rotation shaft of the first MG 20 is directly connected to the output shaft of the engine 10 as compared with the configuration of the vehicle 1 of FIG. And a point that a power transmission device 42 having the clutch 22 is included instead of the power split device 40. Clutch 22 changes first MG 20 and drive wheel 80 between the power transmission state and the power cutoff state.
- the power transmission device 42 is, for example, a speed change mechanism.
- a clutch (broken line in FIG. 6) may be further provided between the engine 10 and the first MG 20.
- the fuel injection is performed after the clutch 22 is controlled to be switched from the disengaged state to the engaged state while the rotational speeds of the engine 10 and the drive wheels 80 in the stopped state are synchronized using the first MG 20.
- the amount of increase in the rotational speed of the first MG 20 increases as the vehicle speed increases. Therefore, the discharge amount in the first MG 20 is increased.
- the battery 70 is permitted by allowing the engine 10 to restart after the vehicle speed V falls below the threshold value V (1).
- the first MG 20 can be operated within the range of output power. As a result, after the vehicle speed V falls below the threshold value V (1), the engine 10 can be restarted immediately in response to a request for restart.
Abstract
Description
Claims (8)
- 駆動輪(80)と、
内燃機関(10)と、
前記内燃機関(10)を始動させるための第1回転電機(20)と、
前記第1回転電機(20)と前記駆動輪(80)との間に連結される動力伝達装置(40,42)と、
車両(1)のシステムの停止指示および起動指示のうちのいずれかを運転者から受けるための入力部(150)と、
前記入力部(150)からの指示に応じて前記車両(1)を制御するための制御部(200)とを含み、
前記制御部(200)は、前記車両(1)の走行中に前記停止指示を前記入力部(150)に受けた場合において、前記車両(1)の速度がしきい値よりも高い間は前記内燃機関の再始動を禁止し、前記車両(1)の速度が前記しきい値よりも低下した後に前記内燃機関(10)の再始動を許可する、車両。 - 前記車両(1)は、前記第1回転電機(20)と電力を授受するための蓄電装置(70)をさらに含み、
前記第1回転電機(20)は、前記車両(1)の走行中に停止状態の前記内燃機関(10)を始動させる場合に発電する、請求項1に記載の車両。 - 前記車両(1)は、摩擦力を用いて前記駆動輪(80)の回転を制限するための制動装置(151)をさらに含み、
前記制御部(200)は、前記車両(1)の走行中に前記停止指示を前記入力部(150)に受けた場合に、前記摩擦力を用いて前記車両(1)の速度を低下させるように前記制動装置(151)を制御する、請求項1に記載の車両。 - 前記動力伝達装置(40)は、自動変速機を含み、
前記制御部(200)は、前記車両(1)の走行中に前記停止指示を前記入力部(150)に受けた場合に、前記自動変速機の変速比を大きくすることによって前記車両(1)の速度を低下させるように前記自動変速機を制御する、請求項1に記載の車両。 - 前記車両(1)は、モータトルクを用いて前記駆動輪(80)の回転を制限するための第2回転電機(30)をさらに含み、
前記制御部(200)は、前記車両(1)の走行中に前記停止指示を前記入力部(150)に受けた場合に、前記モータトルクを用いて前記車両(1)の速度を低下させるように前記第2回転電機(30)を制御する、請求項1に記載の車両。 - 前記車両(1)は、前記駆動輪(80)を回転させるための駆動軸(16)をさらに含み、
前記動力伝達装置(42)は、前記駆動軸(16)、前記内燃機関(10)の出力軸および前記第1回転電機(20)の回転軸の三要素の各々を機械的に連結し、前記三要素のうちのいずれか一つを反力要素とすることによって、他の2つの要素間での動力伝達を可能とする、請求項1に記載の車両。 - 前記動力伝達装置(40)は、前記第1回転電機(20)と前記駆動輪(80)との間の状態を動力伝達状態と動力遮断状態との間で切り換えるためのクラッチ(22)を含む、請求項1に記載の車両。
- 駆動輪(80)と、内燃機関(10)と、前記内燃機関(10)を始動させるための第1回転電機(20)と、前記第1回転電機(20)と前記駆動輪(80)との間に連結される動力伝達装置(40)とを含む車両(1)に用いられる車両用制御方法であって、
車両(1)のシステムの停止指示および起動指示のうちのいずれかを運転者から受けたか否かを判定するステップと、
前記車両(1)の走行中に前記停止指示を受けた場合において、前記車両(1)の速度がしきい値よりも高い間は前記内燃機関(10)の再始動を禁止し、前記車両(1)の速度が前記しきい値よりも低下した後に前記内燃機関(10)の再始動を許可するステップとを含む、車両用制御方法。
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PCT/JP2011/051582 WO2012101802A1 (ja) | 2011-01-27 | 2011-01-27 | 車両および車両用制御方法 |
JP2012554584A JP5652479B2 (ja) | 2011-01-27 | 2011-01-27 | 車両および車両用制御方法 |
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