WO2013088530A1 - 車両の制御装置 - Google Patents
車両の制御装置 Download PDFInfo
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- WO2013088530A1 WO2013088530A1 PCT/JP2011/078926 JP2011078926W WO2013088530A1 WO 2013088530 A1 WO2013088530 A1 WO 2013088530A1 JP 2011078926 W JP2011078926 W JP 2011078926W WO 2013088530 A1 WO2013088530 A1 WO 2013088530A1
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- engine
- vehicle
- motor generator
- braking force
- state
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L7/00—Electrodynamic brake systems for vehicles in general
- B60L7/10—Dynamic electric regenerative braking
- B60L7/18—Controlling the braking effect
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- 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
- 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
- B60K6/48—Parallel type
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L7/00—Electrodynamic brake systems for vehicles in general
- B60L7/20—Braking by supplying regenerated power to the prime mover of vehicles comprising engine-driven generators
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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
- B60W10/08—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
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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
- B60W20/00—Control systems specially adapted for hybrid vehicles
- B60W20/10—Controlling the power contribution of each of the prime movers to meet required power demand
- B60W20/13—Controlling the power contribution of each of the prime movers to meet required power demand in order to stay within battery power input or output limits; in order to prevent overcharging or battery depletion
- B60W20/14—Controlling the power contribution of each of the prime movers to meet required power demand in order to stay within battery power input or output limits; in order to prevent overcharging or battery depletion in conjunction with braking regeneration
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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
- B60W30/18009—Propelling the vehicle related to particular drive situations
- B60W30/18109—Braking
- B60W30/18136—Engine braking
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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
- Y10S903/947—Characterized by control of braking, e.g. blending of regeneration, friction braking
Definitions
- the present invention relates to a vehicle control device including an engine and a motor generator.
- a hybrid vehicle that includes an engine and a motor generator that output driving force for driving to driving wheels, and a battery that stores electric power for driving the motor generator (see, for example, Patent Document 1).
- the hybrid vehicle disclosed in Patent Document 1 can travel only with the driving force of the engine, and can travel by integrating the driving force of the engine and the driving force of the motor generator. Further, in this hybrid vehicle, a regenerative braking force is output when the motor generator generates power during deceleration braking. At this time, the electric power generated by the motor generator is stored in the battery.
- the inertial force during deceleration braking is larger than that in the reference state.
- a large braking force is required.
- the case where the vehicle weight is in the reference state is, for example, a case where a to-be-towed object (for example, a trailer) is not connected to the vehicle, or a case where cargo or the like is not loaded on the vehicle.
- the case where it is larger than the state is, for example, a case where a towed object is connected to the vehicle, or a case where cargo is loaded on the vehicle.
- the regenerative braking force is increased by increasing the electric power generated by the motor generator when the vehicle is in a loaded state (when the vehicle weight is larger than the reference state) during deceleration braking. It is getting bigger. Thereby, it is suppressed that drivability falls, aiming at the improvement of energy efficiency.
- the present invention has been made to solve the above-described problem, and an object of the present invention is to control a vehicle capable of obtaining a sufficient braking force while suppressing reaching the input limit of the power storage device. Is to provide a device.
- a vehicle control device includes an engine and a first motor generator that output driving force for driving to driving wheels, and a power storage device that stores electric power for driving the first motor generator.
- the braking force is mainly generated by the first motor generator of the first motor generator and the engine, and the vehicle weight is larger than the reference state.
- the first motor generator and the engine mainly generates a braking force.
- the generation of the braking force mainly from the first motor generator and the engine is to generate the braking force from at least the first motor generator of the first motor generator and the engine.
- Generating a braking force mainly from the engine among the one motor generator and the engine means generating a braking force from at least the engine among the first motor generator and the engine.
- the braking force by the first motor generator may be smaller when the vehicle weight is larger than the reference state, compared to when the vehicle weight is in the reference state.
- the vehicle includes a clutch disposed between the engine and the first motor generator.
- the vehicle is braked by the engine brake by engaging the clutch. May be generated.
- the vehicle includes a second motor generator capable of motoring the engine, and a power split mechanism that splits and transmits the engine power to the second motor generator and the drive wheels, and the vehicle weight is a reference. If it is larger than the state, the braking force by the engine brake may be generated by motoring the engine by the second motor generator.
- the vehicle control device when the vehicle weight is larger than the reference state, the case where the vehicle is in a towing state is included, and when the vehicle weight is in the reference state, the case where the vehicle is not in a towing state is included. You may do it.
- the vehicle control device of the present invention it is possible to obtain a sufficient braking force while suppressing the input limit of the power storage device from being reached.
- FIG. 1 is a schematic diagram illustrating an overall configuration of a hybrid vehicle provided with an ECU according to a first embodiment of the present invention. It is the block diagram which showed ECU of the hybrid vehicle of FIG. 2 is a flowchart for explaining an operation at the time of deceleration braking while the hybrid vehicle of FIG. 1 is traveling. It is the schematic which showed the whole structure of the hybrid vehicle provided with ECU by 2nd Embodiment of this invention.
- FIG. 5 is a collinear diagram illustrating an example of a traveling state in order to explain a power split mechanism of the hybrid vehicle in FIG. 4. It is the block diagram which showed ECU of the hybrid vehicle of FIG. 5 is a flowchart for explaining an operation at the time of deceleration braking while the hybrid vehicle of FIG. 4 is traveling.
- FIG. 5 is an alignment chart showing a state during regenerative braking in the hybrid vehicle of FIG. 4.
- FIG. 5 is a collinear diagram illustrating a state during regenerative braking and engine braking in the hybrid vehicle
- the hybrid vehicle 100 includes an engine (internal combustion engine) 1, a clutch 2, a motor generator 3, a torque converter 4, and a transmission 5.
- engine internal combustion engine
- clutch 2 a clutch 2
- motor generator 3 a clutch 2
- torque converter 4 a torque converter 5
- the engine 1 is a known power device such as a gasoline engine or a diesel engine that burns fuel and outputs driving force.
- the engine 1 is configured to be able to control operation states such as a throttle opening (intake air amount) of a throttle valve provided in an intake passage, fuel injection amount, ignition timing, and the like.
- the engine 1 can output a driving force for traveling toward drive wheels (for example, rear wheels) 9, and the output of the engine 1 is transmitted to the clutch 2 via the crankshaft 1a.
- the clutch 2 is, for example, a frictional power transmission device, and is disposed between the engine 1 and the motor generator 3.
- the clutch 2 can transmit power between the engine 1 and the motor generator 3 by fastening the crankshaft 1 a of the engine 1 and the rotating shaft 3 a of the motor generator 3. Further, the clutch 2 can cut off the power between the engine 1 and the motor generator 3 by opening the crankshaft 1a and the rotating shaft 3a.
- the motor generator 3 functions as an electric motor and is configured to function as a generator.
- the motor generator 3 is, for example, an AC synchronous motor, and includes a rotor 31 made of a permanent magnet and a stator 32 around which a three-phase winding is wound.
- the rotor 31 is integrally provided with a rotating shaft 3a, and the clutch 2 and the torque converter 4 are connected to the rotating shaft 3a.
- the motor generator 3 can output a driving force for traveling toward the driving wheels 9 and can output a braking force by generating electric power by converting kinetic energy (rotation of the rotor 31) into electric energy. .
- the motor generator 3 also functions as a starter motor when the engine 1 is started.
- the torque converter 4 has a function of increasing the torque input to the input shaft 4a and outputting it to the output shaft 4b.
- This torque converter 4 directly connects a pump impeller 41 connected to an input shaft 4a, a turbine liner 42 connected to an output shaft 4b, a stator 43 for increasing torque, and an input shaft 4a and an output shaft 4b. And a lock-up mechanism 44.
- the rotation shaft 3a of the motor generator 3 is connected to the input shaft 4a, and the input shaft of the transmission 5 is connected to the output shaft 4b.
- the pump impeller 41 sends a fluid (oil) to the turbine liner 42 when rotated.
- the turbine liner 42 is rotated by the fluid sent out from the pump impeller 41.
- the stator 43 rectifies the fluid returned from the turbine liner 42 to the pump impeller 41 when the difference in rotational speed between the pump impeller 41 and the turbine liner 42 is large, and assists the rotation of the pump impeller 41 by the rectified fluid.
- the stator 43 is configured to rotate together with the turbine liner 42 by a one-way clutch 43a when the difference in the rotational speed between the pump impeller 41 and the turbine liner 42 becomes small.
- the lockup mechanism 44 is provided in order to suppress a decrease in transmission efficiency by directly connecting the input shaft 4a and the output shaft 4b.
- the transmission 5 is a stepped automatic transmission, for example, and has a function of shifting the rotational speed (rotational speed) input to the input shaft and outputting it to the output shaft.
- the output of the transmission 5 is transmitted to the drive wheels 9 through the propeller shaft 6, the differential device 7 and the drive shaft 8.
- the transmission 5 may be a continuously variable automatic transmission or a manual transmission.
- the hybrid vehicle 100 is provided with a hydraulic brake device 10 in the vicinity of the drive wheels 9.
- the brake device 10 includes, for example, a disc rotor that rotates together with the drive shaft 8 (drive wheel 9), and a brake caliper having a brake pad.
- the brake device 10 is configured to generate a braking force when a brake pad driven by a brake actuator sandwiches a disk rotor.
- the hybrid vehicle 100 includes an ECU (Electronic Control Unit) 11, a battery 12, and an inverter 13.
- ECU Electronic Control Unit
- the ECU 11 is configured to control the hybrid vehicle 100 and, for example, executes various controls including operation control of the engine 1, drive control of the motor generator 3, and cooperative control of the engine 1 and the motor generator 3. The traveling of the hybrid vehicle 100 is controlled.
- the ECU 11 is an example of the “control device” in the present invention.
- the ECU 11 includes a CPU (Central Processing Unit) 111, a ROM (Read Only Memory) 112, a RAM (Random Access Memory) 113, a backup RAM 114, an input / output interface 115, and a communication interface. 116.
- CPU Central Processing Unit
- ROM Read Only Memory
- RAM Random Access Memory
- the CPU 111 executes arithmetic processing based on various control programs and maps stored in the ROM 112.
- the ROM 112 stores various control programs, maps that are referred to when the various control programs are executed, and the like.
- the RAM 113 is a memory that temporarily stores calculation results by the CPU 111 and detection results of the sensors.
- the backup RAM 114 is a non-volatile memory that stores data to be saved when turning off the ignition.
- the input / output interface 115 has a function of inputting a detection result of each sensor and outputting a control signal to each unit.
- a vehicle speed sensor 21, an accelerator pedal position sensor 22, a brake pedal position sensor 23, a towing switch 24, and the like are connected to the input / output interface 115.
- the vehicle speed sensor 21 is a sensor for detecting the vehicle speed of the hybrid vehicle 100.
- the accelerator pedal position sensor 22 is a sensor for detecting the depression amount of the accelerator pedal 22a
- the brake pedal position sensor 23 is a sensor for detecting the depression amount of the brake pedal 23a.
- the towing switch 24 is provided to switch between a normal state in which the hybrid vehicle 100 does not tow a to-be-triggered object (for example, a trailer) and a towing state in which the hybrid vehicle 100 tows the to-be-triggered object. That is, the towing switch 24 switches between when the weight of the hybrid vehicle 100 (hereinafter referred to as “vehicle weight”) is in the reference state (normal state) and when the vehicle weight is larger than the reference state (traction state). Is provided.
- the towing switch 24 is provided so that it can be operated by a driver. That is, the hybrid vehicle 100 is configured to be able to switch between a normal state and a traction state by a driver's operation. In the traction state, for example, the shift timing of the transmission 5 is different from the normal state in order to suppress a decrease in drivability due to an increase in travel resistance due to the towed object.
- the battery 12 (see FIG. 1) includes a battery module that is a high-voltage power supply for traveling, a battery monitoring unit that monitors the battery module, and a system main relay that connects or disconnects the battery module and the inverter 13. It is out.
- the battery 12 is an example of the “power storage device” in the present invention.
- the battery module of the battery 12 is configured to supply electric power for driving the motor generator 3 and to store electric power generated by the motor generator 3.
- the battery module is, for example, a chargeable / dischargeable nickel metal hydride battery or a lithium ion battery.
- the battery monitoring unit is connected to a sensor for detecting the charge / discharge current, voltage and temperature (battery temperature) of the battery module. Then, the battery monitoring unit transmits information (charge / discharge current, voltage, and battery temperature) related to the battery module to the ECU 11. Thereby, for example, the ECU 11 calculates the SOC (State of Charge) of the battery module based on the integrated value of the charge / discharge current, and calculates the input limit Win and the output limit Wout based on the SOC and the battery temperature. To do.
- SOC State of Charge
- the inverter 13 (see FIG. 1) is, for example, a three-phase bridge circuit having an IGBT and a diode, and is subjected to regenerative control or power running control by controlling the on / off state of the IGBT by a drive signal supplied from the ECU 11. .
- the inverter 13 converts the direct current supplied from the battery 12 into an alternating current to drive the motor generator 3 (powering control), and also converts the alternating current generated by the motor generator 3 during regenerative braking into direct current. It converts into an electric current and outputs it to the battery 12 (regenerative control).
- the hybrid vehicle 100 can run with only the driving force of the engine 1 by operating the engine 1 with the clutch 2 engaged.
- the hybrid vehicle 100 outputs the driving force for driving from the motor generator 3 in a state where the clutch 2 is engaged and the engine 1 is operated, so that the driving force of the engine 1 and the driving force of the motor generator 3 are It is also possible to drive with integrated.
- the hybrid vehicle 100 can also generate electric power with the motor generator 3 by the driving force of the engine 1 while the clutch 2 is engaged and the engine 1 is operated.
- the hybrid vehicle 100 travels only with the driving force of the motor generator 3 (EV traveling) by outputting the driving force from the motor generator 3 while the clutch 2 is disengaged and the operation of the engine 1 is stopped. Is also possible.
- the hybrid vehicle 100 is configured so that the engine 1 can be intermittently operated in accordance with a traveling state or the like.
- step S1 based on the detection result of the vehicle speed sensor 21, it is determined whether or not the hybrid vehicle 100 is traveling. If it is determined that the vehicle is traveling, the process proceeds to step S2. On the other hand, if it is determined that the vehicle is not traveling, step S1 is repeated.
- step S2 based on the detection result of the accelerator pedal position sensor 22, it is determined whether or not the accelerator pedal 22a is turned off. When it is determined that the accelerator pedal 22a is not turned off (the accelerator pedal 22a is turned on), the process proceeds to step S3. On the other hand, if it is determined that the accelerator pedal 22a has been turned off, deceleration braking is started, and the process proceeds to step S4.
- step S3 based on the detection result of the brake pedal position sensor 23, it is determined whether or not the brake pedal 23a is turned on. If it is determined that the brake pedal 23a has been turned on, deceleration braking is started, and the process proceeds to step S4. On the other hand, when it is determined that the brake pedal 23a is not turned on (the brake pedal 23a is turned off), the process returns to step S1 without starting deceleration braking.
- step S4 it is determined whether or not the engine 1 is in operation.
- the process proceeds to step S5.
- the process proceeds to step S7 with the clutch 2 being released.
- step S5 the fuel supply to the engine 1 is stopped (fuel cut). Thereby, the independent operation of the engine 1 is stopped.
- step S6 clutch 2 is released, and power transmission between engine 1 and motor generator 3 is interrupted.
- step S7 it is determined whether or not the hybrid vehicle 100 is in a towing state where the towed object is towed. Whether or not the vehicle is in a towing state is determined based on a signal from the towing switch 24, for example.
- the vehicle weight is in the reference state, and the process proceeds to step S8.
- the vehicle weight is larger than the reference state, and the process proceeds to step S11.
- the motor generator 3 When the hybrid vehicle 100 is in a normal state (not in a traction state), the motor generator 3 is regeneratively controlled in step S8. Specifically, a braking force is output as the motor generator 3 generates power. At this time, since the clutch 2 is released and the rotation of the engine 1 is stopped, no braking force is generated by the engine brake. The generated power is converted from alternating current to direct current by the inverter 13, and the battery module of the battery 12 is charged.
- step S9 based on the detection result of the accelerator pedal position sensor 22, it is determined whether or not the accelerator pedal 22a is turned on. When it is determined that the accelerator pedal 22a is not turned on (the accelerator pedal 22a is turned off), the process proceeds to step S10. On the other hand, when it is determined that the accelerator pedal 22a has been turned on, a series of operations during deceleration braking is terminated.
- step S10 based on the detection result of the vehicle speed sensor 21, it is determined whether or not the traveling of the hybrid vehicle 100 has been stopped. If it is determined that traveling has been stopped, the series of operations during deceleration braking is terminated. On the other hand, if it is determined that traveling is not stopped, the process returns to step S8.
- step S12 the motor generator 3 is regeneratively controlled, and the clutch 1 is engaged so that the engine 1 is rotated and the engine brake functions. That is, when the vehicle weight is larger than the reference state and the inertial force during deceleration braking is large, the braking force by the engine brake is output in addition to the regenerative braking force by the motor generator 3.
- the maximum value (for example, 100 Nm) of the regenerative braking force by the motor generator 3 at this time may be smaller than the maximum value (for example, 150 Nm) of the regenerative braking force in step S8 described above.
- step S13 based on the detection result of the accelerator pedal position sensor 22, it is determined whether or not the accelerator pedal 22a is turned on. When it is determined that the accelerator pedal 22a is not turned on (the accelerator pedal 22a is turned off), the process proceeds to step S14. On the other hand, when it is determined that the accelerator pedal 22a has been turned on, a series of operations during deceleration braking is terminated.
- step S14 based on the detection result of the vehicle speed sensor 21, it is determined whether or not the traveling of the hybrid vehicle 100 has been stopped. If it is determined that traveling has been stopped, the series of operations during deceleration braking is terminated. On the other hand, if it is determined that traveling is not stopped, the process returns to step S12.
- the motor generator 3 when the hybrid vehicle 100 is in the towing state and the vehicle weight is larger than the reference state during the deceleration braking, the motor generator 3 is required when a large braking force is required.
- a part of the required braking force can be taken by the engine brake.
- Sufficient braking force can be obtained while suppressing reaching the input limit Win of 12 battery modules. As a result, even when the vehicle weight is large, it is possible to suppress a decrease in drivability due to insufficient braking force.
- the braking force by the engine brake can be output by fastening the clutch 2.
- the regenerative braking force in the traction state is made smaller than the regenerative braking force in the traction state, so that a large braking force is continuously applied as in the traction state.
- the thermal load on the motor generator 3 can be reduced by reducing the braking force by the motor generator 3 (reducing the maximum value), so that it is possible to avoid the thermal limitation of the motor generator 3.
- drivability can be prevented from decreasing.
- the hybrid vehicle 200 according to the second embodiment is a so-called split-type hybrid vehicle unlike the first embodiment.
- the hybrid vehicle 200 includes an engine (internal combustion engine) 51, a generator 52, a motor 53, a power split mechanism 54, and a reduction mechanism 55.
- the output of the engine 51 is transmitted to the input shaft 54a of the power split mechanism 54 via the crankshaft 51a and the damper 60.
- the damper 60 is, for example, a coil spring type transaxle damper, and absorbs torque fluctuations of the engine 51.
- the other configuration of the engine 51 is the same as that of the engine 1 described above.
- the generator 52 mainly functions as a generator, and also functions as an electric motor depending on the situation.
- the generator 52 is, for example, an AC synchronous generator, and includes a rotor 52a made of a permanent magnet that is rotatably supported with respect to the input shaft 54a, and a stator 52b around which a three-phase winding is wound.
- the generator 52 also functions as a starter motor when the engine 51 is started.
- the generator 52 is an example of the “second motor generator” in the present invention.
- the motor 53 mainly functions as an electric motor, and also functions as a generator depending on the situation.
- the motor 53 is, for example, an AC synchronous motor, and includes a rotor 53a made of a permanent magnet and a stator 53b around which a three-phase winding is wound.
- the motor 53 is an example of the “first motor generator” in the present invention.
- the power split mechanism 54 is a mechanism that divides the output of the engine 51 into power for driving drive wheels (for example, front wheels) 59 and power for driving the generator 52 for power generation.
- a planetary gear mechanism is used. is there.
- the power split mechanism 54 includes an external gear sun gear 54S that rotates at the center of a plurality of gear elements, and an external gear pinion gear that revolves around the sun gear 54S while revolving around it. 54P, a ring gear 54R of an internal gear formed in a hollow annular shape so as to mesh with the pinion gear 54P, and a planetary carrier 54C that supports the pinion gear 54P and rotates through the revolution of the pinion gear 54P.
- the planetary carrier 54C is connected to the input shaft 54a on the engine 51 side so as to rotate together.
- the sun gear 54S is connected to the rotor 52a of the generator 52 so as to rotate together.
- the power of the ring gear 54 ⁇ / b> R is transmitted to the drive wheels 59 through the speed reduction device 56, the differential device 57 and the drive shaft 58.
- FIG. 5 shows an example when the hybrid vehicle 200 is traveling.
- Ns is the rotation speed of the sun gear 54S
- Nc is the rotation speed of the planetary carrier 54C
- Nr is the rotation speed of the ring gear 54R.
- the shaft indicating the rotational speed of the planetary carrier 54C is arranged at a position that internally divides the shaft indicating the rotational speed of the sun gear 54S and the shaft indicating the rotational speed of the ring gear 54R into 1: ⁇ .
- ⁇ is expressed by the following equation, where TNs is the number of teeth of the sun gear 54S and TNr is the number of teeth of the ring gear 54R.
- the rotation speed Ns of the sun gear 54S, the rotation speed Nc of the planetary carrier 54C, and the rotation speed Nr of the ring gear 54R are connected to each other and represented by a straight line. That is, when any two of the rotation speed Ns of the sun gear 54S, the rotation speed Nc of the planetary carrier 54C, and the rotation speed Nr of the ring gear 54R are determined, the remaining one rotation speed is determined. Specifically, the following relationship holds.
- the reduction mechanism 55 is a mechanism that decelerates the rotation of the motor 53 and amplifies the drive torque, and is, for example, a planetary gear mechanism.
- the reduction mechanism 55 is hollow so as to mesh with the sun gear 55S of an external gear that rotates at the center of a plurality of gear elements, the pinion gear 55P of an external gear that rotates while circumscribing the sun gear 55S, and the pinion gear 55P.
- a ring gear 55R of an internal gear formed in an annular shape.
- the ring gear 55R of the reduction mechanism 55 and the ring gear 54R of the power split mechanism 54 are integrated with each other.
- the sun gear 55S is connected to the rotor 53a of the motor 53 so as to rotate together.
- the hybrid vehicle 200 is provided with a hydraulic brake device 61 in the vicinity of the drive wheels 59.
- the brake device 61 is configured similarly to the brake device 10 described above.
- Hybrid vehicle 200 includes ECU 71, battery 72, and inverters 73a and 73b, as shown in FIG.
- the ECU 71 is configured to control the hybrid vehicle 200.
- the ECU 71 performs various controls including operation control of the engine 51, drive control of the generator 52 and the motor 53, cooperative control of the engine 51, the generator 52 and the motor 53, and the like. By executing, the traveling of the hybrid vehicle 200 is controlled.
- the ECU 71 is an example of the “control device” in the present invention.
- the ECU 71 includes a CPU 71a, a ROM 71b, a RAM 71c, a backup RAM 71d, an input / output interface 71e, and a communication interface 71f as shown in FIG.
- the CPU 71a executes arithmetic processing based on various control programs and maps stored in the ROM 71b.
- the ROM 71b stores various control programs, maps that are referred to when the various control programs are executed, and the like.
- the RAM 71c is a memory that temporarily stores a calculation result by the CPU 71a, a detection result of each sensor, and the like.
- the backup RAM 71d is a non-volatile memory that stores data and the like that should be saved when the ignition is turned off.
- the input / output interface 71e has a function of inputting a detection result of each sensor and outputting a control signal to each unit.
- the vehicle speed sensor 21, the accelerator pedal position sensor 22, the brake pedal position sensor 23, the towing switch 24, and the like are connected to the input / output interface 71e.
- the battery 72 (see FIG. 4) is configured in the same manner as the battery 12 described above.
- the battery 72 is an example of the “power storage device” in the present invention.
- the inverters 73a and 73b are, for example, a three-phase bridge circuit having an IGBT and a diode, and regenerative control or power running control is performed by controlling the on / off state of the IGBT by a drive signal supplied from the ECU 71.
- the inverter 73a converts an alternating current generated by the generator 52 by the power of the engine 51 into a direct current and outputs the direct current to the battery 72 (power generation control), and also converts the direct current supplied from the battery 72 into an alternating current.
- the generator 52 is driven by converting into current (power running control).
- the inverter 73b converts the direct current supplied from the battery 72 into an alternating current to drive the motor 53 (power running control), and converts the alternating current generated by the motor 53 during regenerative braking into a direct current. Output to battery 72 (power generation control).
- the hybrid vehicle 200 stops driving the engine 51 and travels (EV traveling) by powering the motor 53 at the time of starting and traveling at a light load at a low vehicle speed.
- the hybrid vehicle 200 travels using the engine 51 as a main power source during steady traveling, etc., and controls the generator 52 to generate power, and auxiliary power running control of the motor 53 by the electric energy obtained by the power generation control. To do.
- the hybrid vehicle 200 travels by driving the engine 51 and controlling the power running of the motor 53 by the electric energy obtained by controlling the power generation of the generator 52 and the electric energy of the battery 72 during acceleration or the like.
- the hybrid vehicle 200 is configured such that the engine 51 can be intermittently operated according to the traveling state and the like.
- steps S21 to S23 are the same as steps S1 to S3 described above, and thus description thereof is omitted.
- step S24 it is determined whether or not the engine 51 is in operation. If it is determined that the engine 51 is in operation, the process proceeds to step S25. On the other hand, when it is determined that the operation of the engine 51 is stopped, the process proceeds to step S26.
- step S25 the fuel supply to the engine 51 is stopped (fuel cut). Thereby, the independent operation of the engine 51 is stopped.
- step S26 it is determined whether or not the hybrid vehicle 200 is in a towed state in which the towed object is towed. Whether or not the vehicle is in a towing state is determined based on a signal from the towing switch 24, for example. If it is determined that the hybrid vehicle 200 is not in the towed state (in a normal state), the vehicle weight is in the reference state, and the process proceeds to step S27. On the other hand, if it is determined that the hybrid vehicle 200 is in the towed state, the vehicle weight is larger than the reference state, and the process proceeds to step S30.
- the motor 53 is regeneratively controlled in step S27. Specifically, as shown in FIG. 8, the braking force Fm is output when the motor 53 generates power in a state where the rotational speed of the engine 51 (the rotational speed of the planetary carrier 54C) becomes zero. At this time, since the generator 52 (sun gear 54S) is idle and the rotation of the engine 51 is stopped, the braking force by the engine brake is not generated. The generated electric power is converted from alternating current to direct current by the inverter 73b, and the battery module of the battery 72 is charged.
- step S28 based on the detection result of the accelerator pedal position sensor 22, it is determined whether or not the accelerator pedal 22a is turned on. When it is determined that the accelerator pedal 22a is not turned on (the accelerator pedal 22a is turned off), the process proceeds to step S29. On the other hand, when it is determined that the accelerator pedal 22a has been turned on, a series of operations during deceleration braking is terminated.
- step S29 based on the detection result of the vehicle speed sensor 21, it is determined whether or not the traveling of the hybrid vehicle 100 has been stopped. If it is determined that traveling has been stopped, the series of operations during deceleration braking is terminated. On the other hand, if it is determined that traveling is not stopped, the process returns to step S27.
- step S30 the engine 51 is motored by the generator 52 in step S30. Therefore, the number of revolutions of the engine 51 that decreases toward zero when the self-sustaining operation is stopped is raised by the generator 52.
- step S31 the motor 53 is regeneratively controlled and the engine 51 is motored, whereby the engine brake functions.
- the rotational speed of the engine 51 in which the independent operation is stopped is increased (the rotation of the engine 51 is maintained).
- the braking force due to the friction is output to the ring gear 54R.
- the braking force Fe by the engine brake is output. Note that the maximum value of the regenerative braking force by the motor 53 at this time may be smaller than the maximum value of the regenerative braking force in step S27 described above.
- step S32 based on the detection result of the accelerator pedal position sensor 22, it is determined whether or not the accelerator pedal 22a is turned on. When it is determined that the accelerator pedal 22a is not turned on (the accelerator pedal 22a is turned off), the process proceeds to step S33. On the other hand, when it is determined that the accelerator pedal 22a has been turned on, a series of operations during deceleration braking is terminated.
- step S33 based on the detection result of the vehicle speed sensor 21, it is determined whether or not the traveling of the hybrid vehicle 200 has been stopped. If it is determined that traveling has been stopped, the series of operations during deceleration braking is terminated. On the other hand, if it is determined that traveling is not stopped, the process returns to step S31.
- the engine 51 is motored by the generator 52, so that the braking force by the engine brake can be output.
- the present invention is applied to the ECU 11 of the FR hybrid vehicle 100, and in the second embodiment, the present invention is applied to the ECU 71 of the FF hybrid vehicle 200.
- the present invention is not limited thereto.
- the present invention may be applied to a control device for a 4WD hybrid vehicle.
- the hybrid vehicle is shown in the towing state as an example in which the vehicle weight is larger than the reference state.
- the present invention is not limited to this, and the vehicle is loaded when cargo or the like is loaded. It may be determined that the weight is greater than the reference state. Further, it may be determined whether the vehicle weight is large based on the towing state and the loading state. It should be noted that the loading state of cargo or the like can be determined based on, for example, a detection result of an acceleration sensor provided in the hybrid vehicle.
- the example in which the traction state and the normal state are switched by the operation of the driver has been described. It is also possible to provide a sensor that switches between the traction state and the normal state based on the detection result of the sensor.
- the braking force by the engine brake may be controlled according to the vehicle weight.
- the braking force by the engine brake may be increased by increasing the rotational speed of the engine 51 motored by the generator 52 as the vehicle weight increases.
- the ECU includes an HV (hybrid) ECU that comprehensively controls the hybrid vehicle, an MG (motor generator) ECU that controls the drive of the inverter, an engine ECU that controls the operation of the engine, and the like.
- HV hybrid
- MG motor generator
- engine ECU that controls the operation of the engine, and the like.
- a plurality of ECUs may be used.
- the regenerative braking force and the braking force by the engine brake are output in the traction state and only the regenerative braking force is output in the non-traction state is shown.
- the braking force by the engine brake is mainly output when the vehicle is in the traction state
- the regenerative braking force is mainly output when the vehicle is not in the traction state.
- only the braking force by the engine brake may be output when the vehicle is in the towing state, and only the regenerative braking force may be output when the vehicle is not in the towing state. Further, only the braking force by the engine brake may be output when the vehicle is in the towing state, and the regenerative braking force and the braking force by the engine brake may be output (mainly the regenerative braking force is output) when the vehicle is not in the towing state. .
- the regenerative braking force and the braking force by the engine brake are output, and the ratio of the braking force by the engine brake is increased in the total braking force.
- the ratio of the regenerative braking force may be increased in the total braking force while outputting the braking force by the engine brake.
- the braking force by the engine brake can be adjusted by controlling the engaged state (half-clutch state) of the clutch 2 in the first embodiment, and the motor in the second embodiment. Adjustment is possible by controlling the number of revolutions 53.
Abstract
Description
-機械的構成-
まず、図1を参照して、本発明の第1実施形態によるECU11が設けられたハイブリッド車両100の機械的構成(駆動機構)について説明する。
次に、図1および図2を参照して、第1実施形態によるハイブリッド車両100の電気的構成について説明する。
次に、第1実施形態によるハイブリッド車両100の走行状態の一例について説明する。
次に、図3を参照して、第1実施形態によるハイブリッド車両100の走行中における減速制動時の動作について説明する。なお、以下の一連の動作は、車両システムが起動しているときに繰り返し行われる。また、以下の各ステップはECU11により実行される。
第1実施形態では、上記のように、減速制動時において、ハイブリッド車両100が牽引状態であり、車重が基準状態よりも大きいことにより、大きな制動力が要求される場合には、モータジェネレータ3から回生制動力を発生させながら、エンジンブレーキによる制動力を発生させることによって、要求される制動力のうちの一部をエンジンブレーキが担うことができるので、モータジェネレータ3により発電される電力がバッテリ12のバッテリモジュールの入力制限Winに達するのを抑制しながら、十分な制動力を得ることができる。これにより、車重が大きい場合であっても、制動力不足によりドライバビリティが低下するのを抑制することができる。
-機械的構成-
次に、図4を参照して、本発明の第2実施形態によるECU71が設けられたハイブリッド車両200の機械的構成(駆動機構)について説明する。なお、第2実施形態によるハイブリッド車両200は、上記第1実施形態と異なり、いわゆるスプリット方式のハイブリッド車両である。
また、ジェネレータ52の回転数をNg、エンジン51の回転数をNe、モータ53の回転数をNm、後述するリダクション機構55の減速比をkとすると以下の関係が成り立つ。
Nc=Ne
Nr=k×Nm
そして、動力分割機構54の共線図上では、サンギヤ54Sの回転数Nsと、プラネタリキャリア54Cの回転数Ncと、リングギヤ54Rの回転数Nrとを結ぶと直線で表される。すなわち、サンギヤ54Sの回転数Ns、プラネタリキャリア54Cの回転数Ncおよびリングギヤ54Rの回転数Nrのうち、いずれか2つの回転数が決定されると、残りの1つの回転数が決定される。具体的には、以下の関係が成り立つ。
リダクション機構55は、モータ53の回転を減速し、駆動トルクの増幅を行う機構であり、たとえば、遊星歯車機構である。
次に、図4および図6を参照して、第2実施形態によるハイブリッド車両200の電気的構成について説明する。
次に、第2実施形態によるハイブリッド車両200の走行状態の一例について説明する。
次に、図7を参照して、第2実施形態によるハイブリッド車両200の走行中における減速制動時の動作について説明する。なお、以下の一連の動作は、車両システムが起動しているときに繰り返し行われる。また、以下の各ステップはECU71により実行される。また、ステップS21~S23は、それぞれ、上記したステップS1~S3と同様であるので説明を省略する。
第2実施形態では、上記のように、減速制動時において、ハイブリッド車両200が牽引状態であり、車重が基準状態よりも大きいことにより、大きな制動力が要求される場合には、モータ53から回生制動力を発生させながら、エンジンブレーキによる制動力を発生させることによって、要求される制動力のうちの一部をエンジンブレーキが担うことができるので、モータ53により発電される電力がバッテリ72のバッテリモジュールの入力制限Winに達するのを抑制しながら、十分な制動力を得ることができる。これにより、車重が大きい場合であっても、制動力不足によりドライバビリティが低下するのを抑制することができる。
なお、今回開示した実施形態は、すべての点で例示であって、限定的な解釈の根拠となるものではない。したがって、本発明の技術的範囲は、上記した実施形態のみによって解釈されるものではなく、特許請求の範囲の記載に基づいて画定される。また、本発明の技術的範囲には、特許請求の範囲と均等の意味および範囲内でのすべての変更が含まれる。
2 クラッチ
3 モータジェネレータ(第1モータジェネレータ)
9 駆動輪
11 ECU(制御装置)
12 バッテリ(蓄電装置)
100 ハイブリッド車両(車両)
51 エンジン
52 ジェネレータ(第2モータジェネレータ)
53 モータ(第1モータジェネレータ)
54 動力分割機構
59 駆動輪
71 ECU(制御装置)
72 バッテリ(蓄電装置)
200 ハイブリッド車両(車両)
Claims (5)
- 走行用の駆動力を駆動輪に出力するエンジンおよび第1モータジェネレータと、前記第1モータジェネレータを駆動するための電力を蓄電する蓄電装置とを備える車両の制御装置であって、
減速制動時において、車重が基準状態の場合には、前記第1モータジェネレータと前記エンジンとのうち前記第1モータジェネレータを主として制動力を発生させ、車重が基準状態よりも大きい場合には、前記第1モータジェネレータと前記エンジンとのうち前記エンジンを主として制動力を発生させることを特徴とする車両の制御装置。 - 請求項1に記載の車両の制御装置において、
前記第1モータジェネレータによる制動力は、車重が基準状態の場合に比べて、車重が基準状態よりも大きい場合の方が小さいことを特徴とする車両の制御装置。 - 請求項1または2に記載の車両の制御装置において、
前記車両は、前記エンジンと前記第1モータジェネレータとの間に配置されたクラッチを備え、
車重が基準状態よりも大きい場合には、前記クラッチを締結することにより、エンジンブレーキによる制動力を発生させることを特徴とする車両の制御装置。 - 請求項1または2に記載の車両の制御装置において、
前記車両は、前記エンジンをモータリング可能な第2モータジェネレータと、前記エンジンの動力を前記第2モータジェネレータおよび前記駆動輪に分割して伝達する動力分割機構とを備え、
車重が基準状態よりも大きい場合には、前記第2モータジェネレータにより前記エンジンをモータリングすることにより、エンジンブレーキによる制動力を発生させることを特徴とする車両の制御装置。 - 請求項1~4のいずれか1つに記載の車両の制御装置において、
車重が基準状態よりも大きい場合には、前記車両が牽引状態である場合が含まれ、車重が基準状態の場合には、前記車両が牽引状態ではない場合が含まれることを特徴とする車両の制御装置。
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JP2007223421A (ja) * | 2006-02-22 | 2007-09-06 | Mitsubishi Fuso Truck & Bus Corp | ハイブリッド電気自動車の制御装置 |
JP2009171727A (ja) * | 2008-01-16 | 2009-07-30 | Isuzu Motors Ltd | 車両のエネルギ回生装置 |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
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JP2016060372A (ja) * | 2014-09-18 | 2016-04-25 | ジヤトコ株式会社 | 車両制御装置、及びその制御方法 |
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JP5780314B2 (ja) | 2015-09-16 |
JPWO2013088530A1 (ja) | 2015-04-27 |
US9457667B2 (en) | 2016-10-04 |
US20140336893A1 (en) | 2014-11-13 |
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