WO2007126037A1 - 内燃機関の停止制御装置および停止制御方法 - Google Patents
内燃機関の停止制御装置および停止制御方法 Download PDFInfo
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- WO2007126037A1 WO2007126037A1 PCT/JP2007/059142 JP2007059142W WO2007126037A1 WO 2007126037 A1 WO2007126037 A1 WO 2007126037A1 JP 2007059142 W JP2007059142 W JP 2007059142W WO 2007126037 A1 WO2007126037 A1 WO 2007126037A1
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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
- B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
- B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
- B60L58/12—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries responding to state of charge [SoC]
- B60L58/15—Preventing overcharging
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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
- 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
- B60L15/00—Methods, circuits, or devices for controlling the traction-motor speed of electrically-propelled vehicles
- B60L15/20—Methods, circuits, or devices for controlling the traction-motor speed of electrically-propelled vehicles for control of the vehicle or its driving motor to achieve a desired performance, e.g. speed, torque, programmed variation of speed
- B60L15/2045—Methods, circuits, or devices for controlling the traction-motor speed of electrically-propelled vehicles for control of the vehicle or its driving motor to achieve a desired performance, e.g. speed, torque, programmed variation of speed for optimising the use of energy
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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
- B60L50/00—Electric propulsion with power supplied within the vehicle
- B60L50/10—Electric propulsion with power supplied within the vehicle using propulsion power supplied by engine-driven generators, e.g. generators driven by combustion engines
- B60L50/16—Electric propulsion with power supplied within the vehicle using propulsion power supplied by engine-driven generators, e.g. generators driven by combustion engines with provision for separate direct mechanical propulsion
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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
- B60L50/00—Electric propulsion with power supplied within the vehicle
- B60L50/50—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells
- B60L50/60—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells using power supplied by batteries
- B60L50/61—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells using power supplied by batteries by batteries charged by engine-driven generators, e.g. series hybrid electric vehicles
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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
- B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
- B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
- B60L58/24—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries for controlling the temperature of batteries
- B60L58/25—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries for controlling the temperature of batteries by controlling the electric load
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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
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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
- B60W10/00—Conjoint control of vehicle sub-units of different type or different function
- B60W10/24—Conjoint control of vehicle sub-units of different type or different function including control of energy storage means
- B60W10/26—Conjoint control of vehicle sub-units of different type or different function including control of energy storage means for electrical energy, e.g. batteries or capacitors
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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
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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
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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
- B60W20/40—Controlling the engagement or disengagement of prime movers, e.g. for transition between prime movers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D29/00—Controlling engines, such controlling being peculiar to the devices driven thereby, the devices being other than parts or accessories essential to engine operation, e.g. controlling of engines by signals external thereto
- F02D29/06—Controlling engines, such controlling being peculiar to the devices driven thereby, the devices being other than parts or accessories essential to engine operation, e.g. controlling of engines by signals external thereto peculiar to engines driving electric generators
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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
- B60L2210/00—Converter types
- B60L2210/40—DC to AC converters
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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
- B60L2260/00—Operating Modes
- B60L2260/40—Control modes
- B60L2260/50—Control modes by future state prediction
- B60L2260/54—Energy consumption estimation
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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
- B60W2710/00—Output or target parameters relating to a particular sub-units
- B60W2710/24—Energy storage means
- B60W2710/242—Energy storage means for electrical energy
- B60W2710/244—Charge state
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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
- B60W2710/00—Output or target parameters relating to a particular sub-units
- B60W2710/24—Energy storage means
- B60W2710/242—Energy storage means for electrical energy
- B60W2710/248—Current for loading or unloading
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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
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- 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
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- Y02T10/64—Electric machine technologies in electromobility
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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
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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
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- Y02T10/7072—Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
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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
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Definitions
- the present invention relates to a stop control device and a stop control method for an internal combustion engine.
- the present invention relates to a stop control device and a stop control method for an internal combustion engine, and more particularly to stop control for an internal combustion engine in a vehicle configured to generate a stop force of the internal combustion engine by a power generation operation of a rotating electrical machine.
- a vehicle equipped with a power train called a hybrid system that combines an internal combustion engine (for example, a gasoline engine or a diesel engine) and a rotating electrical machine (motor generator, etc.) has been developed.
- the output sharing between the operation by the internal combustion engine (hereinafter also referred to as the engine) and the operation by the rotating electric machine is automatically switched regardless of the amount of accelerator operation by the driver, and the most efficient. It is controlled to improve.
- the engine is operated in a steady state and is operated to rotate a generator that charges a power storage device such as a secondary battery, or intermittently during running depending on the amount of charge of the secondary battery, etc.
- the engine is repeatedly started and stopped regardless of the amount of accelerator operation by the driver. In other words, by operating the engine and the electric motor individually or in cooperation, it becomes possible to improve fuel consumption and significantly reduce exhaust gas.
- the engine of the hybrid vehicle is intermittently driven even during traveling, and the stop control is frequently performed.
- engine rotational energy kinetic energy
- the electric power generated at this time is used to charge the secondary battery.
- Patent Document 1 Japanese Unexamined Patent Publication No. Hei 10-0 30 7 9 (hereinafter referred to as Patent Document 1) is a power output device composed of a prime mover (corresponding to an engine), a three-axis power input / output means, and two electric motors. Disclosed a power output device that quickly sets the motor speed to ⁇ when stopped To do.
- This power output device is a power output device that outputs power to a drive shaft, and includes a prime mover having an output shaft, a first motor that has a rotary shaft and inputs and outputs power to the rotary shaft, and a drive shaft.
- a second motor that inputs and outputs power to the drive shaft, and three shafts that are coupled to the drive shaft, output shaft, and rotary shaft, respectively.
- the power output device when the conditions for stopping the operation of the prime mover are satisfied, the power output device instructs to stop the fuel supply to the prime mover and executes the control at the time of stop.
- This stop-time control applies torque in the direction opposite to the rotational direction to the output shaft of the prime mover, and stops the prime mover by limiting the deceleration of the output shaft to a predetermined range.
- the deceleration of the output shaft is limited to a predetermined range, and for example, it is possible to perform control such as passing through the torsional resonance region quickly. At the same time, it is possible to avoid unnecessary power consumption in the motor.
- the rotational energy of the engine is converted into electric energy by the power generation operation by the rotating electrical machine (first electric motor) and recovered by the engine stop control.
- This electrician energy is usually used to charge the battery.
- An object of the present invention is to stop an internal combustion engine that generates a stopping force by a power generation operation of a rotating electrical machine.
- An object of the present invention is to provide a stop control device and a stop control method for an internal combustion engine capable of preventing the occurrence of overcharge due to excessive input power to the power storage device during the stop control.
- An internal combustion engine stop control device includes an internal combustion engine that operates by fuel combustion, a first rotating electrical machine configured to generate a stop force of the internal combustion engine by a power generation operation when the internal combustion engine stops, and a power storage device And a stop control device for an internal combustion engine in a vehicle comprising a power transfer circuit for transferring power between the first rotating electrical machine, an input restriction setting means, a power generation estimation means, an input power estimation means, Loss control means.
- the input restriction setting means sets the allowable input power of the power storage device.
- the power generation estimation means estimates the power generated by the first rotating electrical machine when the internal combustion engine is stopped.
- the input power estimating means estimates the power consumption in the power transfer circuit when the internal combustion engine is stopped, and estimates the input power to the power storage device based on the estimated power consumption and the generated power estimated by the power generation estimating means.
- the loss control means controls the operation of the power transfer circuit so that the power consumption in the power transfer circuit increases when the input power estimated by the input power estimation means exceeds the allowable input power.
- An internal combustion engine stop control method includes: an internal combustion engine that operates by fuel combustion; a first rotating electrical machine configured to generate a stop force of the internal combustion engine by a power generation operation when the internal combustion engine is stopped;
- a stop control method for an internal combustion engine in a vehicle comprising a power transfer circuit for transferring power between a power storage device and a first rotating electrical machine, the method comprising: setting an allowable input power of the power storage device; Estimating the power generated by the first rotating electric machine at the time of stoppage, estimating the power consumption at the power transfer circuit when the internal combustion engine is stopped, and supplying the power storage device based on the estimated power consumption and the estimated power generation Estimating the input power and controlling the operation of the power transfer circuit so that the power consumption in the power transfer circuit increases when the estimated input power exceeds the allowable input power And a step of performing.
- the stop control device and stop control method for an internal combustion engine when controlling the stop of the internal combustion engine, the input power to the power storage device is estimated, and when the estimated input power exceeds the allowable input power of the power storage device,
- the operation of the power transfer circuit can be controlled to increase power consumption. Therefore, it is possible to accurately detect the possibility that the input power to the power storage device will be excessive due to the stop control of the internal combustion engine. By increasing power consumption on the road, overcharging of the power storage device can be prevented.
- the power transfer circuit increases the power consumption only when the input power to the power storage device exceeds the allowable input power. Electricity energy can be recovered more effectively by minimizing the opportunity for increased power consumption in the transfer circuit.
- the internal combustion engine stop control device further includes a voltage determination unit and a power generation stop unit.
- the voltage determination unit compares the output voltage of the power storage device with the management upper limit voltage.
- the power generation stop means stops the power generation operation of the first rotating electrical machine when the internal combustion engine is stopped when the voltage determination means determines that the output voltage of the power storage device exceeds the control upper limit voltage.
- the internal combustion engine stop control method includes a step of comparing the output voltage of the power storage device with a management upper limit voltage, and when the comparison step determines that the output voltage of the power storage device has exceeded the management upper limit voltage. And a step of stopping the power generation operation of the first rotating electrical machine when the engine is stopped.
- the internal combustion engine stop control device further includes input power prediction means and power generation suppression means.
- the input power prediction means predicts the input power to the power storage device when the power consumption in the power transfer circuit is increased to the upper limit by the loss control means.
- the power generation suppression means outputs an output torque command for the first rotating electrical machine so that the power generated by the first rotating electrical machine decreases when the input power to the power storage device predicted by the input power prediction means exceeds the allowable input power.
- the internal combustion engine stop control method predicts the input power to the power storage device when the power consumption in the power transfer circuit is increased to the upper limit by the controlling step and the prediction step. And correcting the output torque command of the first rotating electrical machine so that the power generated by the first rotating electrical machine decreases when the input power to the stored power storage device exceeds the allowable input power.
- the deceleration of the internal combustion engine is increased by restricting the power storage device to a range where it is possible to reliably avoid overcharging and protect the equipment. Stop control can be realized.
- the power transfer circuit is configured to perform power conversion between the DC power input / output to / from the power storage device and the AC power input / output to / from the first rotating electrical machine by a switching operation of a plurality of switching elements.
- the loss control means raises the switching frequency of each switching element of the first inverter when the input power estimated by the input power estimation means exceeds the allowable input power.
- the controlling step increases the switching frequency of each switching element of the first inverter when the estimated input power exceeds the allowable input power.
- the vehicle further includes a second rotating electrical machine provided in parallel with the internal combustion engine so as to be able to generate a vehicle driving force, and the power transfer circuit enters the power storage device by a switching operation of a plurality of switching elements.
- a second inverter configured to perform power conversion between the output DC power and the AC power input / output to / from the second rotating electrical machine.
- the loss control means increases the switching frequency of each switching element of the second inverter when the input power estimated by the input power estimation means exceeds the allowable input power.
- the controlling step increases the switching frequency of each switching element of the second inverter when the estimated input power exceeds the allowable input power.
- an inverter (first driving control for the second rotating electrical machine) By increasing the switching loss in the inverter (2), it is possible to increase the power consumption in the power transfer circuit and prevent overcharging of the power storage device without providing a new mechanism for surplus power consumption.
- the power transfer circuit includes the converter and the first inverter. Including barter.
- the converter is provided between the power storage device and the DC power supply wiring, and is configured to transfer DC power between the power storage device and the DC power supply wiring by a switching operation of the switching element.
- the first inverter is configured to perform power conversion between the DC power on the DC power supply wiring and the AC power input / output to / from the first rotating electrical machine by switching operations of a plurality of switching elements. Inverter.
- the switching operation in the converter is controlled so as to control the voltage of the DC power supply wiring according to the voltage command value.
- the loss control means increases the switching frequency of the converter switching element when the input power estimated by the input power estimation means exceeds the allowable input power.
- the controlling step increases the switching frequency of the switching element of the converter when the estimated input power exceeds the allowable input power.
- the switching loss in the converter that converts the input / output voltage of the power storage device to power is increased, thereby increasing the power consumption in the power transfer circuit without providing a new mechanism for surplus power consumption.
- overcharging of the power storage device can be prevented.
- the power transfer circuit includes a converter and first and second inverters.
- the converter is provided between the power storage device and the DC power supply wiring, and is configured to transfer DC power between the power storage device and the DC power supply wiring by a switching operation of the switching element.
- the first inverter is configured to perform power conversion between the DC power on the DC power supply wiring and the AC power input to and output from the first rotating electrical machine by the switching operation of the plurality of switching elements.
- the second inverter is configured to perform power conversion between the DC power on the DC power supply wiring and the AC power input to and output from the second rotating electrical machine by the switching operation of a plurality of switching elements.
- the switching operation in the converter is controlled so as to control the voltage of the DC power supply wiring according to the voltage command value.
- the loss control means increases the voltage command value of the comparator when the input power estimated by the input power estimation means exceeds the allowable input power.
- the controlling step increases the voltage command value of the converter when the estimated input power exceeds the allowable input power.
- Switching loss can be increased by increasing the DC voltage switched by one inverter. Therefore, without providing a new mechanism for consuming surplus power, it is possible to increase power consumption in the power transfer circuit and prevent overcharging of the power storage device. Note that in the configuration in which the smoothing capacitor is provided in the DC power supply wiring, the input power to the power storage device can be reduced by increasing the stored power of the capacitor, and overcharging of the power storage device can be more effectively prevented.
- the vehicle further includes a second rotating electric machine provided in parallel with the internal combustion engine so as to generate a vehicle driving force
- the power transfer circuit includes a converter and first and second inverters.
- the converter is provided between the power storage device and the DC power supply wiring, and is configured to exchange DC power between the power storage device and the DC power supply wiring by a switching operation of the switching element.
- the first inverter is configured to perform power conversion between the DC power on the DC power supply wiring and the AC power input / output to / from the first rotating electrical machine by the switching operation of the plurality of switching elements.
- the second inverter is configured to perform power conversion between the DC power on the DC power supply wiring and the AC power input / output to / from the second rotating electrical machine by switching operations of the plurality of switching elements.
- the switching operation in the converter is controlled so that the voltage of the DC power supply wiring matches the voltage command value.
- the loss control means (1) increases the switching frequency of the switching element of the converter, (2) each switching of the first inverter Increase in switching frequency of the element,
- the controlling step executes at least one of the above (1) to (4) when the estimated input power exceeds the allowable input power.
- the switching loss is increased in at least one of the converter for converting the input / output voltage of the power storage device to power and the first and second inverters for driving and controlling the first and second rotating electric machines.
- the power storage device is configured by a lithium ion secondary battery. Therefore, the main advantage of the present invention is to prevent the occurrence of overcharge due to excessive input power to the power storage device during the stop control of the internal combustion engine that generates the stop force of the internal combustion engine by the power generation operation of the rotating electrical machine.
- FIG. 1 is a block diagram illustrating the configuration of a hybrid vehicle shown as an example of mounting a stop control device for an internal combustion engine according to an embodiment of the present invention.
- FIG. 2 is a collinear diagram illustrating the operation of the equipment during engine stop control in the hybrid vehicle shown in FIG.
- FIG. 3 is a flowchart for explaining a series of control processes in the engine stop control according to the embodiment of the present invention.
- FIG. 4 is a functional block diagram illustrating power estimation in engine stop control according to the embodiment of the present invention.
- FIG. 5 is a waveform diagram for explaining the power loss generated in each switching element of the inverter.
- FIG. 6 is a first conceptual diagram illustrating overcharge avoidance due to increased power consumption.
- FIG. 7 is a second conceptual diagram illustrating overcharge avoidance due to increased power consumption.
- FIG. 8 is a flowchart illustrating a series of control processing in engine stop control according to Modification 1 of the embodiment of the present invention.
- FIG. 9 is a flowchart illustrating a series of control processing in engine stop control according to the second modification of the embodiment of the present invention.
- FIG. 1 is a block diagram illustrating a configuration of a hybrid vehicle 100 shown as an example of mounting an internal combustion engine stop control device according to an embodiment of the present invention.
- hybrid vehicle 1 0 0 includes engine 1 1 0, power split mechanism 1 2 0, motor generators MG 1 and MG 2, reducer 1 3 0, and drive shaft 1 4 0 And wheels (drive wheels) 1 5 0.
- the hybrid vehicle 1 0 0 further includes a DC voltage generator 1 0 #, a smoothing capacitor CO, inverters 2 0 and 30, and a control device 5 0 for driving and controlling the motor generators MG 1 and MG 2. Equipped.
- the engine 110 is composed of an internal combustion engine such as a gasoline engine or a diesel engine.
- the engine 110 is provided with a cooling water temperature sensor 1 1 2 that detects the temperature of the cooling water.
- the output of the cooling water temperature sensor 1 1 2 is sent to the control device 50.
- Power split device 1 2 0 is configured to be able to split the power generated by engine 1 1 0 into a + route to drive shaft 1 4 0 and a route to motor generator MG 1.
- a planetary gear mechanism having three rotating shafts of a sun gear, a planetary gear, and a ring gear can be used.
- the rotor of motor generator MG 1 is hollow and the crank shaft of engine 110 is passed through the center of the rotor, so that engine 1 10 and motor generators MG 1 and MG 2 are mechanically connected to power split mechanism 1 2 0. Can be connected.
- the rotor of motor generator MG 1 is connected to the sun gear
- the output shaft of engine 110 is connected to the planetary gear
- output shaft 1 25 is connected to the ring gear
- Output shaft 1 2 5 connected to the rotation shaft of motor generator MG 2 is connected to drive shaft 1 4 0 for rotationally driving drive wheels 1 5 0 via reduction gear 1 3 0.
- a reduction gear for the rotation shaft of motor generator MG 2 may be further incorporated.
- Motor generator MG 1 operates as a generator driven by engine 110, and operates as a motor that starts engine 110, and is configured to have both the functions of a motor and a generator. Is done.
- motor generator MG 2 is incorporated into hybrid vehicle 1 0 0 for generating vehicle driving force whose output is transmitted to drive shaft 1 4 0 via output shaft 1 2 5 and reducer 1 3 0. It is. Furthermore, motor generator MG 2 generates regenerative power by generating an output torque in the direction opposite to the rotation direction of wheels 1 5 0. It is configured to have functions for both the electric motor and the generator.
- DC voltage generation unit 10 # includes a traveling battery B, a smoothing capacitor C 1, and a step-up / down converter 15.
- the traveling battery B corresponds to the “power storage device” in the present invention
- the step-up / down converter 15 corresponds to the “converter” in the present invention.
- a secondary battery such as nickel metal hydride or lithium ion can be applied.
- the traveling battery B configured by the secondary battery is an “power storage device”, but an electric double layer capacitor or the like is applied instead of the traveling battery B. It is also possible.
- the battery voltage V b output from the traveling battery B is detected by the voltage sensor 10, and the battery current I b input to and output from the traveling battery B is detected by the current sensor 11. Furthermore, a temperature sensor 12 is provided in the traveling battery B. Note that the temperature sensor 12 may be provided at a plurality of locations of the traveling battery B because the temperature of the traveling battery B may be locally different. Battery voltage V b, battery current I b, and battery temperature T b detected by voltage sensor 10, current sensor 1 1, and temperature sensor 1 2 are output to control device 50.
- the smoothing capacitor C 1 is connected between the ground line 5 and the power supply line 6. Note that a relay (between the positive terminal of the traveling battery B and the power line 6 and between the negative terminal of the traveling battery B and the ground line 5 is turned on when the vehicle is operating and is turned off when the vehicle is stopped. (Not shown).
- the step-up / down converter 15 (hereinafter also simply referred to as a converter) includes a rear tuttle L 1 and switching-controlled power semiconductor elements (hereinafter referred to as “switching elements J”) Q l and Q 2.
- Switching elements J switching-controlled power semiconductor elements
- Reactor L 1 Is connected between the connection node of switching elements Q 1 and Q 2 and power supply line 6.
- Smoothing capacitor C 0 is connected between power supply line 7 and ground line 5.
- the power semiconductor switching elements Q 1 and Q 2 are connected in series between the power line 7 and the ground line 5.
- the power semiconductor switching elements Q 1 and Q 2 are turned on and off by switching control signals S 1 and S 2 from the control device 50. Controlled.
- an IGBT Insulated Gate Bipolar Transistor
- a power MOS Metal Oxide Semiconductor
- a power bipolar transistor or the like
- Anti-parallel diodes D 1 and D 2 are arranged for switching elements Q l and Q 2.
- the arrangement of the step-up / down converter 15 allows variable control of the DC voltage on the power supply line 7 without fixing it to the output voltage of the power storage device (traveling battery B).
- the amplitude of the AC voltage applied to the motor generators MG 1 and MG 2 can be variably controlled to enable highly efficient motor control.
- the DC voltage side of the inverters 20 and 30 is connected to the buck-boost converter 15 via the common ground line 5 and the power line 7. That is, the power supply line 7 corresponds to the “DC power supply wiring” in the present invention.
- Motor generator MG 1 corresponds to “first rotating electrical machine” in the present invention
- motor generator MG 2 corresponds to “second rotating electrical machine” in the present invention.
- the inverter 20 corresponds to the “first inverter” in the present invention
- the inverter 30 corresponds to the “second inverter” in the present invention
- the “power transfer circuit” in the present invention is configured by the step-up / down converter 15, the smoothing capacitor C 0, and the inverters 20, 30.
- Inverter 20 includes a U-phase arm 22, a V-phase arm 24 and a W-phase arm 26 provided in parallel between power supply line 7 and ground line 5.
- Each phase arm is composed of switching elements connected in series between the power line 7 and the ground line 5.
- U-phase arm 2 2 consists of switching elements Q ll and Q 1 2
- V-phase arm 2 4 consists of switching elements Q 1 3 and Q 1 4 forces
- W-phase arm 2 6 consists of switching element Q It consists of 1 5, Q 1 6 forces.
- anti-parallel diodes Dl 1 to D 16 are connected to the switching elements Q l 1 to Q 16, respectively.
- the on / off states of the switching elements Q 1 1 to Q 16 are controlled by switching control signals S 11 to S 16 from the control device 50.
- Motor generator MG 1 consists of U-phase coil wire U 1 and V-phase provided on the stator. Includes coil wire V 1 and W-phase coil wire W 1 and a rotor (not shown). One end of U-phase coil wire U 1, V-phase coil wire V 1 and W-phase coil wire W 1 are connected to each other at neutral point N 1 and the other end is connected to U-phase arm 2 2 of inverter 20 , V phase arm 2 4 and W phase arm 2 6 are connected.
- the inverter 20 is connected to the DC voltage generator 1 0 # by on / off control (switching control) of the switching elements Q 1 1 to Q 16 in response to the switching control signals S 11 to S 16 from the control device 50. And bidirectional power conversion between motor generator MG1.
- inverter 20 converts the DC voltage received from power supply line 7 into a three-phase AC voltage according to switching control by control device 50, and converts the converted three-phase AC voltage to motor generator MG 1 Can be output. Thus, motor generator MG 1 is driven to generate a designated torque.
- Inverter 20 receives the output of engine 110 and converts the three-phase AC voltage generated by motor generator MG 1 into a DC voltage in accordance with switching control by controller 50, and converts the converted DC voltage to a power source. It can also be output to line 7.
- the inverter 30 is configured in the same manner as the inverter 20, and switching elements Q 2 1 to Q 2 6 that are on / off controlled by switching control signals S 21 to S 26 and anti-parallel diodes D 21 to D Consists of 2-6.
- Motor generator MG 2 is configured in the same manner as motor generator MG 1, and includes U-phase coil wire U 2, V-phase coil wire V 2 and W-phase coil wire W 2 provided on the stator, not shown. Including a rotor. As with motor generator MG 1, one end of U-phase coil winding U 2, V-phase coil winding V 2 and Wffi coil winding W 2 are connected to each other at neutral point N 2 and the other end is connected to inverter 3 It is connected to U phase arm 3 2, 0 phase arm 3 4 and W phase arm 3 6 of 0 respectively.
- Inverter 30 has a DC voltage generator 1 0 # by ON / OFF control (switching control) of switching elements Q 2 1 to Q 2 6 in response to switching control signals S 2 1 to S 2 6 from control device 50.
- the inverter 30 converts the DC voltage received from the power supply line 7 into a three-phase AC voltage according to switching control by the control device 50, and converts the converted voltage 3
- the phase AC voltage can be output to the motor generator MG2.
- motor generator MG 2 is driven to generate a specified torque.
- the inverter 30 converts the three-phase AC voltage generated by the motor generator MG 2 by receiving the rotational force from the wheel 150 during regenerative braking of the vehicle into the DC voltage according to the switching control by the control device 50, and the converted DC voltage can be output to power line 7.
- regenerative braking means braking with regenerative power generation when the driver operating the hybrid vehicle performs foot braking, or turning off the accelerator pedal while driving, although the foot brake is not operated. This includes decelerating (or stopping acceleration) the vehicle while generating regenerative power.
- Each of motor generators MG 1 and MG 2 is provided with a current sensor 27 and a rotation angle sensor (resolver) 28. Since the sum of the instantaneous values of the three-phase currents iu, iv, iw is zero, the current sensor 27 has two phases of motor current (for example, V-phase current i V and W-phase current iw) as shown in Fig. 1. It is sufficient to arrange it so as to detect.
- Rotation angle sensor 28 detects a rotation angle ⁇ of a rotor (not shown) of motor generators MG 1 and MG 2 and sends the detected rotation angle ⁇ to control device 50.
- Control device 50 can calculate rotation speed Nmt (rotational angular velocity ⁇ ) of motor generators MG 1 and MG 2 based on rotation angle 0.
- Nmt rotational angular velocity ⁇
- number of revolutions refers to the number of revolutions per unit time (typically per minute) unless otherwise specified.
- the motor current MCRT (1) and the rotor rotation angle 0 (1) of the motor generator MG 1 and the motor current MCRT (2) and the rotor rotation angle 0 (2) of the motor generator MG 2 detected by these sensors are Input to controller 50. Further, the control device 50 uses the torque command value T qc om (1) of the motor generator MG 1 as the motor command, the control signal RGE (1) indicating the regenerative operation, and the torque command value T qc of the motor generator MG 2. Receives om (2) and control signal RGE (2) indicating regenerative operation.
- the control device 50 composed of an electronic control unit (ECU) includes a microcomputer (not shown), a RAM (Random Access Memory) 51, and a ROM (Read Step-up / down converter 15 so that the motor generators MG 1 and MG 2 operate according to the motor command input from the host electronic control unit (ECU) according to the predetermined program processing.
- ECU electronice control unit
- ROM Read Step-up / down converter 15
- Switching control signals S 1 and S 2 step-up / down converter 15
- S 11 to S 16 inverter 20
- S 21 to S 2 for 20 and 30 switching control
- control device 50 is input with information on the battery B for traveling, such as input possible power Pin, Pout, and the like indicating charging / discharging limitation (SOC: State of Charge).
- SOC charging / discharging limitation
- the control device 50 limits the power consumption and generated power (regenerative power) of the motor generators MG 1 and MG 2 as necessary so that the overcharge or overdischarge of the traveling battery B does not occur. It has the function to do.
- the mechanism for switching the switching frequency in the inverter control by the single control unit (ECU) 50 has been described.
- the same control configuration is realized by the cooperative operation of the plurality of control units (ECU). It is also possible.
- the control device 50 determines the DC voltage VH (this DC voltage corresponding to the direct current side voltage of the inverters 20 and 30) according to the operating state of the motor generators MG1 and MG2.
- Set the voltage command value VHr ef (hereinafter also referred to as “system voltage VH”) (hereinafter also referred to as system voltage command value VHr ef), and based on the detected value of system voltage command value VHr ef and voltage sensor 13.
- the switching control signals S 1 and S 2 are generated so that the output voltage of the voltage converter 15 is equal to the system voltage command straight VHr ef.
- the DC / DC voltage (battery voltage) Vb supplied from the running battery B is boosted to the inverter 20
- the step-up / step-down converter 15 steps down the DC voltage (system voltage) supplied from the inverters 20 and 30 via the smoothing capacitor CO and charges the running battery B. More specifically, in response to the switching control signals S 1 and S 2 from the control device 50, there are a period in which only the switching element Q 1 is turned on and a period in which both the switching elements Q 1 and Q 2 are turned off. Alternatingly provided, the step-down ratio corresponds to the duty ratio in the ON period.
- Smoothing capacitor C O smoothes the DC voltage (system voltage) from buck-boost converter 15 and supplies the smoothed DC voltage to inverters 20 and 30.
- the voltage sensor 13 detects the voltage across the smoothing capacitor C 0, that is, the system voltage VH, and outputs the detected value to the control device 50.
- the power line 7 supplies power to other loads 170 such as auxiliary machines.
- loads 170 such as auxiliary machines.
- the load 170 includes, for example, a heater for heating hot water, a temperature control device (air conditioner), a blower motor, a heater for a defroster, and the like.
- the power consumption by the load 170 varies depending on the operating state of these loads (ON / OFF setting, operating condition setting), and so on.
- the inverter 30 follows the torque command value Tq c om (2) by the on / off operation (switching operation) of the switching elements Q 2 1 to Q 26 in response to the switching control signals S 21 to S 26 from the controller 50.
- Motor generator MG 2 is driven so that torque is output.
- the torque command value of motor generator MG 2 is set to a negative value (T qc om (2) ⁇ 0).
- the inverter 30 converts the AC voltage generated by the motor generator MG 2 into a DC voltage by a switching operation in response to the switching control signals S 21 to S 26, and converts the converted DC voltage (system Voltage) through a smoothing capacitor CO 1 to 5.
- the inverter 20 controls the motor generator MG 1 by on / off control of the switching elements Q 11 to Q 16 according to the switching control signals S 11 to S 16 from the control device 50. Performs power conversion so that operates according to the command value.
- the control device 50 controls the motor generators MG 1 and MG 2 according to the torque command values T qc om (1) and T qc om (2), so that in the hybrid vehicle 100, the motor generator MG 2 Due to generation of vehicle driving force due to power consumption, generation of charging power of battery B for driving or generation of power consumption of motor generator MG 2 due to power generation by motor generator MG 1, and regenerative braking operation (power generation) by motor generator MG 2 Generation of charging power for the battery B for traveling can be appropriately performed according to the driving state of the vehicle.
- the operation and stop of the engine 110 are controlled independently of the amount of accelerator operation by the driver.
- the engine 110 can be operated intermittently according to the vehicle running state (load, vehicle speed, etc.) and the state of charge of the power storage device (running battery B).
- the engine 110 and the electric motor (motor generator MG2) are operated individually or in cooperation as the vehicle driving force source, respectively, thereby making it possible to significantly improve fuel consumption and significantly reduce exhaust gas.
- the engine 110 is intermittently driven even during traveling, and the stop control is frequently performed.
- engine stop control in the hybrid vehicle 100 will be described.
- the generation of negative torque by the motor generator MG 1 generates electric power generated according to the torque X rotation speed.
- This generated power is converted into DC power by the inverter 20 and supplied to the power line 7.
- power consumption is indicated by a positive value, and generated power is indicated by a negative value.
- FIG. 3 is a flowchart for explaining a series of control processes in the engine stop control according to the embodiment of the present invention.
- the control process shown in FIG. 3 is realized by executing a predetermined program stored in advance at a predetermined cycle by the control unit (ECU) 50 during the engine stop process.
- ECU control unit
- control device 50 obtains allowable input power Pin of travel battery B (power storage device) in step S100.
- the allowable input power P i n varies according to the battery state (SOC and / or battery temperature, etc.). In particular, when the battery temperature is low, the allowable input power Pin decreases due to an increase in internal resistance.
- the allowable input power Pin may be input from a separately provided control device (ECU) for battery control.
- ECU control device
- a map with the battery temperature Tb, SOC, etc. as arguments is stored in the control device 50, and this map is stored.
- the allowable input power Pin may be obtained by referring to
- control device 50 estimates generated power Pg of motor generator MG 1 by engine stop control. For example, using the current rotation speed Nmt1 of the motor generator MG1 and the MG1 torque command value Tqcom (1), the generated power Pg is expressed by the following equation (1).
- Equation (1) since the torque command value T q c om (1) ⁇ 0 during engine stop control, the generated power P g is a negative value (P g ⁇ 0).
- control device 50 estimates the total power consumption P tt 1 (P tt 1> 0) in the current operation state in step S120.
- the total power consumption is It means the power consumption in the path where the power generated by motor generator MG 1 is input to the power storage device (traveling battery B).
- the total power consumption P tt 1 is the power loss Lmg 1 in the motor generator MG 1, the power Pmg 2 and the power loss Lmg 2 in the motor generator MG 2, and the inverters 20 and 30.
- FIG. 4 is a functional block diagram illustrating power estimation in engine stop control according to the embodiment of the present invention.
- MG 1 power consumption estimation unit 200 refers to estimation map 205 to execute power Pmg 1 (corresponding to generated power P g during engine stop control) and motor generator MG 1.
- MG 2 power consumption estimation section 210 estimates execution power Pmg 2 by motor generator MG 2 and loss power Lmg 2 by motor generator MG 2 by referring to estimation map 215.
- the execution power in the motor generator is given by the product of the motor generator speed and output torque. As mentioned above, the effective power becomes negative during power generation.
- the power loss in each motor generator is the sum of the copper loss caused by the current flowing in each phase coil winding and the iron loss caused by the change in the magnetic flux in the iron core. For this reason, the smaller the current flowing through each phase coil winding, the smaller the power loss. Basically, the value of the current flowing through the coil winding is in accordance with the output torque.
- the map 205 uses the rotation speed and torque (torque command value T qc om (1)) of the motor generator MG 1 as arguments and obtains the estimated values of the execution power P mg 1 and the loss power Lmg 1 in advance. Composed.
- map 215 uses the number of revolutions and torque of motor generator MG 2 (torque command value T qc om (2)) as arguments to determine the estimated power of execution power Pmg 2 and power loss Lmg 2. Pre-configured.
- each inverter 20, 30 is mainly the switching element Q 1 1 to Q 1 6, Power loss in Q 2 1 to Q 2 6.
- the power loss in the switching element mainly includes the on-resistance and the switching operation.
- the switching operation in each switching element of inverters 20 and 30 is basically set according to pulse width modulation control (P WM control). Specifically, as shown in FIG. 5 (a), in the PWM control, each of the inverters 20 and 30 is based on a voltage comparison between a predetermined carrier wave 3 0 0 and a voltage command wave 3 1 0. The on / off of the switching element in the phase arm is controlled.
- the carrier wave 3 0 0 is generally a triangular wave or a sawtooth wave having a predetermined frequency
- the voltage command wave 3 1 0 is used to operate the motor generator MG in accordance with the torque command value T qcom. Indicates the voltage (AC voltage) applied to the motor generator to generate the required phase current.
- FIG. 5 shows a switching waveform of a switching element that is turned on when the voltage command wave is higher than the carrier wave and turned off when the voltage is opposite.
- the amplitude of the collector-emitter voltage vce corresponds to the system voltage VH
- Collector-emitter current ice is a current corresponding to the current supplied to motor generator MG. Therefore, at the same torque output, that is, under the same torque command value, the switching loss P 1 oss increases as the system voltage VH increases. The more the number of switching operations per unit time is, that is, the higher the carrier wave 300 frequency is set and the higher the switching frequency, the greater the power loss associated with the switching operation. Therefore, the power loss due to switching operation depends on the torque or output of the motor generator, the DC voltage to be switched (system voltage VH), and the switching frequency determined by the carrier frequency.
- the inverter power consumption estimation unit 220 refers to the map 225 and outputs the motor generator MG 1 output (speed X torque) or torque (torque command value T qc om (1)) and Based on the system voltage VH and the carrier frequency fivl used in the inverter 20, the loss power L i V 1 in the inverter 20 can be estimated.
- Map 225 uses the number of revolutions of motor generator MG 1, torque (torque command value Tq c om (1)), system voltage VH, and carrier frequency fiv 1 as arguments to find an estimate of power loss L i V 1 Pre-configured.
- the inverter power consumption estimation unit 230 refers to the map 235, and outputs the motor generator MG 2 output (rotation speed X torque) or torque (torque command value T qc om (2)) as well as the system voltage VH and Based on the carrier frequency fiv 2 used in the inverter 30, the power loss L i V 2 in the inverter 30 can be estimated.
- Map 235 uses the number of revolutions of motor generator MG 2, torque (torque command value Tq c om (2)), system voltage VH and carrier frequency fiv 2 as arguments to calculate the estimated power loss L i V 2 Pre-configured.
- the power consumption in the buck-boost converter 15 is mainly due to the switching elements Q1, It is the sum of the power loss at Q2 and the power loss at reactor L1.
- the power loss in switching elements Ql and Q2 increases in proportion to the number of switchings per unit time, that is, the increase in carrier frequency fcV.
- the converter power consumption estimation unit 240 determines the power loss L in the buck-boost converter 15 based on the system voltage VH, the battery current I b and the carrier frequency fc V used in the buck-boost converter 15 by referring to the map 245. c V can be estimated.
- the map 245 is configured in advance so as to obtain an estimated value of the loss power Lc V using the system voltage VH :, the battery current I b and the carrier frequency f c V as arguments.
- the voltage difference AVH between the current system voltage VH and the voltage command value VH r e f affects the input power to the power storage device (running battery ⁇ ). That is, when VH r e f> VH, the electric power according to this voltage difference is accumulated in the smoothing capacitor CO among the electric power generated by the motor generator MG 1. On the other hand, when VH> VHref, the power according to this voltage difference is released from the smoothing capacitor and added to the input power to the power storage device.
- the capacitor power estimation unit 250 can estimate the accumulated power change ⁇ Pc in the smoothing capacitor CO based on the system voltage VH and the voltage command value VH reference by referring to the map 255.
- the map 255 is configured in advance so as to obtain the stored power change ⁇ c using the system voltage VH and the voltage command value VHr ef as arguments.
- auxiliary machine power consumption estimation unit 260 can estimate the auxiliary machine power consumption Pa based on the operation state (on / off setting, operating condition setting) of the load (auxiliary machine) 170 by referring to the map 265.
- Map 265 uses the operating state of auxiliary loads (for example, heaters for heating hot water, temperature control devices (air conditioners), blower motors, heaters for defrosters, etc.) as an argument to obtain an estimated value of auxiliary power consumption Pa. Pre-configured.
- the control device 50 performs step S by step S130. 1 Based on the sum of the generated power P g estimated at 10 and the total power consumption P tt 1 estimated at step S 120, the input power to the traveling battery B (power storage device) is estimated. That is, the estimated input power Pb is expressed by the following equation (2).
- control device 50 determines the magnitude of estimated input power Pb and allowable input power P in obtained in step S130. Since the allowable input power P i n is a negative value, when Pb is P i n,
- the margin power k (k> 0) is set, and the input power depends on whether or not Pb ⁇ P in + k is satisfied. It is preferable to determine whether or not is excessive.
- step S 140 At the time of NO determination in step S 140, that is, when the estimated input power P b reflecting the total power consumption P tt 1 in the current operating state is within the allowable range, the control device 50 remains in the current operating state.
- the motor generator MG 1 outputs a predetermined negative torque, and the engine stop control is executed so as to obtain a desired deceleration (step S 150).
- step S140 determines whether the estimated input power Pb reflecting the total power consumption Ptt1 in the current operating state exceeds the allowable range.
- the control device 50 performs step S160.
- the operation state is changed in at least one of the buck-boost converter 15 and the inverters 20 and 30 so that the total power consumption P tt 1 is increased. It is also possible to change the operating state of load 1 70 (auxiliary machine).
- this change in operating state includes: (a) switching frequency increase in at least one of buck-boost converter 15, inverter 20 and inverter 30 (carrier frequency increase), (b) voltage command Value VHr ef rises, (c) At least one of auxiliary load operating state changes is executed.
- the power loss L cv in the buck-boost converter 15, the power loss L i V 1 in the inverter 20, the voltage L i V 2 in the inverter 30, the power consumed by the load (catcher) 1 70 Pa and the smoothing capacitor At least 1 of the stored power change ⁇ P c of C 0
- the total power consumption P tt 1 is increased to P tt 1 #.
- the switching frequency increase due to (a) above is not necessarily executed for all of the buck-boost converter 15, the inverter 20, and the inverter 30, but may be individually determined whether or not it is necessary to execute each of them. Good.
- the change target of the operation state by the process in step S 1 60 in FIG. 3 is determined according to the required increase amount ⁇ ⁇ t t 1 (FIG. 6) of the total power consumption P t t 1.
- the relationship between the required increase amount AP tt 1 and the operating state change target is determined in advance by obtaining the predicted value of the total power consumption increase amount associated with the execution of (a) to (c) above. Can be kept.
- control device 50 changes the operating state so as to increase the overall power consumption in accordance with step S 1 60 at step S 1 70, and then uses motor generator MG 1 to perform a predetermined operation.
- the engine stop control is executed so that the desired deceleration can be obtained.
- step S 1 0 0 corresponds to the “input limit acquisition means” of the present invention
- step S 1 1 0 corresponds to the “generated power estimation means” of the present invention
- 1 2 0 and S 1 3 0 correspond to “input power estimation means” in the present invention
- Step S 1 60 corresponds to “loss control means” in the present invention.
- the power consumption in the power transfer circuit is increased only when the input power to the power storage device exceeds the allowable range based on the estimation of power consumption in the power consumption circuit according to the current operating state. It is possible to effectively recover the electric energy generated by the engine stop control while suppressing a significant increase in power consumption.
- the amount of power consumption increase due to the change of the operation state of the buck-boost converter 15 and the inverters 20 and 30. For this reason, as shown in FIG. 7, even if the total power consumption is increased to the upper limit, the input power to the power storage device (traveling battery B) may exceed the allowable range. In this case, in order to avoid overcharging of the power storage device, it is necessary to reduce the amount of power generated by motor generator MG 1 or stop power generation.
- FIG. 8 is a flowchart for explaining a series of control processes in engine stop control according to the first modification of the embodiment of the present invention to deal with such a case.
- steps S200 to S220 are executed in addition to the processing in the flowchart shown in FIG.
- control device 50 obtains the voltage of battery B (power storage device) for traveling, that is, battery voltage Vb, based on the output of voltage sensor 10. Further, the control device 50 compares the acquired battery voltage Vb with the management upper limit voltage V bma X in step S210.
- This control upper limit voltage V b ma a X is preferably set so as to have a margin with respect to a limit voltage that leads to a failure of the battery B (driving device) or a decrease in the service life.
- step S210 the control device 50 uses the same processing in steps S1 00 to S170 as in FIG.
- the engine stop control that prevents overcharging of battery B (power storage device) is executed.
- step S 210 corresponds to “voltage determining means” of the present invention
- step S 220 corresponds to “power generation stopping means” of the present invention.
- FIG. 9 is a flowchart for explaining a series of control processes in the engine stop control according to the second modification of the embodiment of the present invention.
- steps S 250 to S 270 are executed in addition to the processing in the flowchart shown in FIG.
- step S140 determines whether the estimated input power Pb reflecting the total power consumption P tt 1 in the current operation state exceeds the allowable range.
- the control device 50 changes the operation state in step S250.
- the upper limit value P tt 1 ma X of the total power consumption that can be increased by the above is estimated, and the estimated input power P b # to the power storage device (traveling battery B) at this time is obtained.
- control device 50 determines whether or not estimated input power Pb # in step S250 exceeds an allowable range. That is, in step S 260, it is determined whether P b #> P i n + k is satisfied.
- step S260 that is, if the estimated input power P b # is within the allowable range (l P b #
- the motor generator MG 1 outputs a predetermined negative torque, and executes engine stop control so as to obtain a desired deceleration.
- step S 270 the control device 50 performs the surplus according to step S 270.
- Generated power AP g
- the absolute value of the torque command value T qcom (1) which is a negative value, is decreased.
- the amount of decrease in the torque command value (absolute # :) at this time can be set based on the surplus generated power AP g and MG 1 rotation speed.
- step S 2 50 corresponds to “input power prediction means” of the present invention
- step S 2 70 corresponds to “power generation suppression means” of the present invention.
- electric power is exchanged between the generator (motor generator MG 1) and the power storage device (traveling battery B) used for engine stop control via the step-up / down converter 15.
- the application of the present invention is not limited to such a configuration. That is, even in a configuration in which the arrangement of the step-up / down converter 15 is omitted, the present invention can be applied by increasing power consumption by changing the operating state of the inverters 20 and 30 (increasing the switching frequency).
- the engine stop control in the hybrid vehicle is exemplified.
- any vehicle having an engine 110 (internal combustion engine) and an electric motor capable of executing the engine stop control with a power generation operation may be used.
- the present invention can be applied without limiting other configurations.
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP07742577.5A EP2011709A4 (en) | 2006-04-24 | 2007-04-20 | STOP CONTROL DEVICE AND STOP CONTROL PROCESS FOR A COMBUSTION ENGINE |
US12/226,053 US7822535B2 (en) | 2006-04-24 | 2007-04-20 | Internal combustion engine stop controller and stop control method |
CN2007800149300A CN101432175B (zh) | 2006-04-24 | 2007-04-20 | 内燃机的停止控制装置以及停止控制方法 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2006-119395 | 2006-04-24 | ||
JP2006119395A JP4232789B2 (ja) | 2006-04-24 | 2006-04-24 | 内燃機関の停止制御装置および停止制御方法 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2007126037A1 true WO2007126037A1 (ja) | 2007-11-08 |
Family
ID=38655558
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2007/059142 WO2007126037A1 (ja) | 2006-04-24 | 2007-04-20 | 内燃機関の停止制御装置および停止制御方法 |
Country Status (5)
Country | Link |
---|---|
US (1) | US7822535B2 (ja) |
EP (1) | EP2011709A4 (ja) |
JP (1) | JP4232789B2 (ja) |
CN (1) | CN101432175B (ja) |
WO (1) | WO2007126037A1 (ja) |
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Also Published As
Publication number | Publication date |
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US7822535B2 (en) | 2010-10-26 |
EP2011709A1 (en) | 2009-01-07 |
US20090171554A1 (en) | 2009-07-02 |
EP2011709A4 (en) | 2014-05-28 |
CN101432175B (zh) | 2012-12-12 |
CN101432175A (zh) | 2009-05-13 |
JP2007290483A (ja) | 2007-11-08 |
JP4232789B2 (ja) | 2009-03-04 |
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