WO2014185250A1 - Hybrid vehicle, and control method therefor - Google Patents
Hybrid vehicle, and control method therefor Download PDFInfo
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- WO2014185250A1 WO2014185250A1 PCT/JP2014/061620 JP2014061620W WO2014185250A1 WO 2014185250 A1 WO2014185250 A1 WO 2014185250A1 JP 2014061620 W JP2014061620 W JP 2014061620W WO 2014185250 A1 WO2014185250 A1 WO 2014185250A1
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- engine
- hybrid vehicle
- battery
- control method
- warm
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- 238000000034 method Methods 0.000 title claims abstract description 18
- 239000000498 cooling water Substances 0.000 claims description 7
- 239000010687 lubricating oil Substances 0.000 claims description 3
- 238000010792 warming Methods 0.000 abstract description 5
- 239000000446 fuel Substances 0.000 description 8
- 238000002485 combustion reaction Methods 0.000 description 6
- 230000005540 biological transmission Effects 0.000 description 3
- 230000006866 deterioration Effects 0.000 description 3
- 230000002542 deteriorative effect Effects 0.000 description 3
- 239000010705 motor oil Substances 0.000 description 3
- 239000003921 oil Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- 239000002826 coolant Substances 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
Images
Classifications
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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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- 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
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- 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
- B60L15/2054—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 by controlling transmissions or clutches
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- 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
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- 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
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- 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
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- 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
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- 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
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- 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
- 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
- B60W30/18—Propelling the vehicle
- B60W30/192—Mitigating problems related to power-up or power-down of the driveline, e.g. start-up of a cold engine
- B60W30/194—Mitigating problems related to power-up or power-down of the driveline, e.g. start-up of a cold engine related to low temperature conditions, e.g. high viscosity of hydraulic fluid
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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
- F02D29/02—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 vehicles; peculiar to engines driving variable pitch propellers
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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
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/02—Circuit arrangements for generating control signals
- F02D41/04—Introducing corrections for particular operating conditions
- F02D41/06—Introducing corrections for particular operating conditions for engine starting or warming up
- F02D41/068—Introducing corrections for particular operating conditions for engine starting or warming up for warming-up
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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
- F02D9/00—Controlling engines by throttling air or fuel-and-air induction conduits or exhaust conduits
- F02D9/04—Controlling engines by throttling air or fuel-and-air induction conduits or exhaust conduits concerning exhaust conduits
- F02D9/06—Exhaust brakes
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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
- B60L2240/00—Control parameters of input or output; Target parameters
- B60L2240/40—Drive Train control parameters
- B60L2240/44—Drive Train control parameters related to combustion engines
- B60L2240/445—Temperature
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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
- B60L2240/00—Control parameters of input or output; Target parameters
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- B60L2240/486—Operating parameters
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- 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
- B60L2240/00—Control parameters of input or output; Target parameters
- B60L2240/40—Drive Train control parameters
- B60L2240/50—Drive Train control parameters related to clutches
- B60L2240/507—Operating parameters
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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
- F02D2250/00—Engine control related to specific problems or objectives
- F02D2250/18—Control of the engine output torque
- F02D2250/24—Control of the engine output torque by using an external load, e.g. a generator
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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
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/02—Circuit arrangements for generating control signals
- F02D41/04—Introducing corrections for particular operating conditions
- F02D41/06—Introducing corrections for particular operating conditions for engine starting or warming up
- F02D41/062—Introducing corrections for particular operating conditions for engine starting or warming up for starting
- F02D41/064—Introducing corrections for particular operating conditions for engine starting or warming up for starting at cold start
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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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
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- Y02T10/60—Other road transportation technologies with climate change mitigation effect
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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
- Y02T10/7072—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
- 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
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Definitions
- the present invention relates to a hybrid vehicle and a control method thereof, and more particularly to a hybrid vehicle and a control method thereof that can promote engine warm-up without deteriorating fuel consumption.
- hybrid vehicles in which at least part of the driving force generated by the internal combustion engine is replaced by a travel motor using a battery as a power source have attracted attention from the viewpoint of improving fuel efficiency and environmental measures. .
- the exhaust brake device is activated during warm-up operation to increase the load.
- the exhaust brake device is activated during warm-up operation to increase the load.
- it has been conventionally performed to promote warm-up.
- idle-up may be performed simultaneously.
- An object of the present invention is to provide a hybrid vehicle capable of promoting engine warm-up without deteriorating fuel consumption and a control method thereof.
- the hybrid vehicle of the present invention that achieves the above object is a hybrid vehicle comprising a hybrid system using at least one of an electric motor connected to a battery and an engine as a drive source, and a control means for controlling the hybrid system.
- the control means is characterized in that, during the warm-up operation of the engine, the travel motor is driven by a part of the driving force of the engine to generate electric power, and the battery is charged with the generated electric power. is there.
- an exhaust throttle valve is interposed in the exhaust passage of the engine, and the control means can further promote the warm-up of the engine by closing the exhaust throttle valve during the warm-up operation of the engine. it can.
- the control means is preset when at least one selected from the temperature of the cooling water in the engine, the temperature of the lubricating oil of the engine, and the outside temperature of the hybrid vehicle when the switch operated by the driver of the hybrid vehicle is on. It is desirable to close the exhaust throttle valve when it is below the set threshold value.
- a hybrid vehicle control method of the present invention that achieves the above object is a hybrid vehicle control method including a hybrid system that uses at least one of an electric motor connected to a battery and an engine as a drive source. During the warm-up operation, the traveling motor is driven by a part of the driving force of the engine, and the battery is charged with the electric power generated by the traveling motor.
- the battery is charged with the electric power generated by driving the travel motor with a part of the driving force of the engine. Since the engine is warmed up in a high negative driving state, warming up of the engine is promoted, and part of the rotational energy of the engine is charged into the battery as electric power, so that deterioration of fuel consumption can be suppressed.
- FIG. 1 is a configuration diagram of a hybrid vehicle according to a first embodiment of the present invention.
- FIG. 2 is a flowchart illustrating a hybrid vehicle control method according to the first embodiment of the present invention.
- FIG. 3 is a configuration diagram of a hybrid vehicle according to the second embodiment of the present invention.
- FIG. 4 is a flowchart illustrating a hybrid vehicle control method according to the second embodiment of the present invention.
- FIG. 1 shows a hybrid vehicle according to the first embodiment of the present invention.
- This hybrid vehicle (hereinafter referred to as “HEV”) 1A includes a diesel engine 5 and a travel motor 6 that are connected via a transmission 4 to an output shaft 3 that transmits a driving force to a pair of left and right drive wheels 2 and 2.
- a hybrid system 9 having a battery 8 electrically connected to the traveling motor 6 through an inverter 7 is provided.
- a wet multi-plate clutch 10 and a fluid coupling 11 are sequentially provided between the transmission 4 and the diesel engine 5.
- a motor clutch 12 that connects and disconnects the driving force is interposed between the transmission 4 and the traveling motor 6.
- the hybrid system 9 is connected to the ECU 13 as a control means through a signal line (indicated by a one-dot chain line).
- the ECU 13 determines whether the HEV 1A is in a warm-up operation (S10). If the HEV 1A is in a warm-up operation, the ECU 13 connects the motor clutch 12 and uses the travel motor 6 as a generator to generate an inverter 7 The battery 8 is charged through (S12). This operation increases the load of the diesel engine 5 and increases the amount of heat generated in the high negative operation state, so that warming up of the diesel engine 5 is promoted. In addition, since a part of the rotational energy of the diesel engine 5 is charged into the battery 8 as electric power, it is possible to suppress the deterioration of the fuel efficiency of the HEV 1A.
- the rated maximum capacity of the battery 8 is a value defined in advance according to the specifications of the battery 8, for example, a state where the storage rate (SOC) is 70 to 90%.
- each part of the diesel engine 5 has reached an appropriate temperature (S20). When the temperature is at an appropriate temperature, it is determined that the diesel engine 5 has been warmed up (S22), and the motor clutch 12 is turned on. Disconnect (S24). Examples of the temperature of each part of the diesel engine 5 include the temperature of cooling water and the temperature of lubricating oil (engine oil).
- the warm-up of the diesel engine 5 can be promoted without deteriorating the fuel consumption.
- FIG. 3 shows a hybrid vehicle according to the second embodiment of the present invention.
- symbol is attached
- an exhaust throttle valve 15 constituting an exhaust brake is interposed in an exhaust passage 14 through which exhaust gas G from the diesel engine 5 flows.
- the exhaust throttle valve 15 is closed to increase the exhaust pressure of the diesel engine 5, thereby increasing the pumping loss and obtaining a large braking force.
- the diesel engine 5 is provided with a cooling water thermometer 16 for measuring the temperature of the cooling water in the engine and an oil thermometer 17 for measuring the temperature of the engine oil. Furthermore, an outside air thermometer 18 for measuring the outside air temperature around the HEV 1B is provided.
- the exhaust throttle valve 15 and the three thermometers 16, 17, 18 are connected to the ECU 13 through signal lines, respectively.
- the predetermined requirement for closing the exhaust throttle valve 15 is that a measured value of at least one thermometer 16/17/18 selected from the cooling water thermometer 16, the oil thermometer 17, and the outside air thermometer 18 is previously set.
- the case where it is less than the set threshold value is preferably exemplified.
- the threshold value is in the range of -20 to 0 ° C for the coolant temperature, -20 to 0 ° C for the engine oil, and -20 to 0 ° C for the outside air temperature. .
- the ECU 13 may close the exhaust throttle valve 15 when a switch operated by the driver of the HEV 1B is turned on instead of determining whether or not there is a predetermined requirement as in step 13.
- the diesel engine 5 can be warmed up more rapidly than the control method according to the first embodiment. Accordingly, although there is energy loss due to pumping loss, warm-up is performed rapidly in this way, so that overall deterioration of fuel consumption can be further suppressed.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- General Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Automation & Control Theory (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
- Control Of Throttle Valves Provided In The Intake System Or In The Exhaust System (AREA)
- Control Of Vehicle Engines Or Engines For Specific Uses (AREA)
- Hybrid Electric Vehicles (AREA)
Abstract
A hybrid vehicle and control method therefor according to the present invention is characterized in that an ECU (13) determines whether an HEV (1A) is warming up (S10) and, if warming up, connects a motor clutch (12) and uses a travelling motor (6) as an electric generator to charge a battery (8) through an inverter (7).
Description
本発明はハイブリッド車両及びその制御方法に関し、更に詳しくは、燃費を悪化させることなくエンジンの暖機を促進することができるハイブリッド車両及びその制御方法に関する。
The present invention relates to a hybrid vehicle and a control method thereof, and more particularly to a hybrid vehicle and a control method thereof that can promote engine warm-up without deteriorating fuel consumption.
近年、燃費向上と環境対策などの観点から、内燃機関が発生する駆動力の少なくとも一部を、バッテリーを電源とする走行モータで代替するハイブリッド車両(以下「HEV」という。)が注目されている。
In recent years, hybrid vehicles (hereinafter referred to as “HEV”) in which at least part of the driving force generated by the internal combustion engine is replaced by a travel motor using a battery as a power source have attracted attention from the viewpoint of improving fuel efficiency and environmental measures. .
このHEVにおいても、通常の車両と同様に、冷間始動時には内燃機関の暖機運転を行うことが好ましい。ここで、内燃機関をディーゼルエンジンとする通常の車両においては、例えば日本出願の特開平11-148375号公報に記載されているように、暖機運転時に排気ブレーキ装置を起動して負荷を増加させることで、暖機を促進することが従来より行われている。なお、暖機運転時のエンジン回転数を安定させるために、アイドルアップを同時に行うこともある。
Also in this HEV, it is preferable to perform a warm-up operation of the internal combustion engine at the time of cold start, as in a normal vehicle. Here, in a normal vehicle having an internal combustion engine as a diesel engine, as described in Japanese Patent Application Laid-Open No. 11-148375, for example, the exhaust brake device is activated during warm-up operation to increase the load. Thus, it has been conventionally performed to promote warm-up. In addition, in order to stabilize the engine speed at the time of warm-up operation, idle-up may be performed simultaneously.
しかし、内燃機関をディーゼルエンジンとするHEVにおいて、従来の車両と同じようにして暖機を促進すると、燃費向上の効果が損なわれてしまうという問題がある。
However, in a HEV using a diesel engine as an internal combustion engine, there is a problem that if the warm-up is promoted in the same manner as a conventional vehicle, the effect of improving fuel efficiency is impaired.
本発明の目的は、燃費を悪化させることなくエンジンの暖機を促進することができるハイブリッド車両及びその制御方法を提供することにある。
An object of the present invention is to provide a hybrid vehicle capable of promoting engine warm-up without deteriorating fuel consumption and a control method thereof.
上記の目的を達成する本発明のハイブリッド車両は、バッテリーに接続された電動モータ及びエンジンの少なくとも一方を駆動源とするハイブリッドシステムと、前記ハイブリッドシステムを制御する制御手段とを備えたハイブリッド車両において、前記制御手段は、前記エンジンの暖機運転時に、該エンジンの駆動力の一部により前記走行モータを駆動して発電させ、その発電された電力で前記バッテリーを充電することを特徴とするものである。
The hybrid vehicle of the present invention that achieves the above object is a hybrid vehicle comprising a hybrid system using at least one of an electric motor connected to a battery and an engine as a drive source, and a control means for controlling the hybrid system. The control means is characterized in that, during the warm-up operation of the engine, the travel motor is driven by a part of the driving force of the engine to generate electric power, and the battery is charged with the generated electric power. is there.
上記のハイブリッド車両においては、エンジンの排気通路に排気絞り弁を介設し、制御手段は、エンジンの暖機運転時に排気絞り弁を閉弁することで、エンジンの暖機をより促進することができる。
In the hybrid vehicle described above, an exhaust throttle valve is interposed in the exhaust passage of the engine, and the control means can further promote the warm-up of the engine by closing the exhaust throttle valve during the warm-up operation of the engine. it can.
制御手段は、前記ハイブリッド車両のドライバーにより操作されるスイッチがオンである場合に、又はエンジン内の冷却水の温度、エンジンの潤滑油の温度及びハイブリッド車両の外気温から選ばれる少なくとも1つが予め設定されたしきい値未満である場合に、上記の排気絞り弁を閉弁することが望ましい。
The control means is preset when at least one selected from the temperature of the cooling water in the engine, the temperature of the lubricating oil of the engine, and the outside temperature of the hybrid vehicle when the switch operated by the driver of the hybrid vehicle is on. It is desirable to close the exhaust throttle valve when it is below the set threshold value.
また、上記の目的を達成する本発明のハイブリッド車両の制御方法は、バッテリーに接続された電動モータ及びエンジンの少なくとも一方を駆動源とするハイブリッドシステムを備えたハイブリッド車両の制御方法において、前記エンジンの暖機運転時に、該エンジンの駆動力の一部により前記走行モータを駆動し、該走行モータが発電した電力で前記バッテリーを充電することを特徴とするものである。
A hybrid vehicle control method of the present invention that achieves the above object is a hybrid vehicle control method including a hybrid system that uses at least one of an electric motor connected to a battery and an engine as a drive source. During the warm-up operation, the traveling motor is driven by a part of the driving force of the engine, and the battery is charged with the electric power generated by the traveling motor.
上記のハイブリッド車両の制御方法においては、エンジンの暖機運転時にその排気通路を閉止することが望ましい。
In the above hybrid vehicle control method, it is desirable to close the exhaust passage when the engine is warming up.
本発明のハイブリッド車両及びその制御方法によれば、エンジンの暖機運転時に、エンジンの駆動力の一部により走行モータを駆動して発電させた電力でバッテリーを充電するようにしたので、エンジンが高負運転状態となってエンジンの暖機が促進されるとともに、エンジンの回転エネルギーの一部が電力となってバッテリーに充電されるので、燃費の悪化を抑制することができる。
According to the hybrid vehicle and the control method thereof of the present invention, when the engine is warmed up, the battery is charged with the electric power generated by driving the travel motor with a part of the driving force of the engine. Since the engine is warmed up in a high negative driving state, warming up of the engine is promoted, and part of the rotational energy of the engine is charged into the battery as electric power, so that deterioration of fuel consumption can be suppressed.
以下に、本発明の実施の形態について、図面を参照して説明する。
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
図1は、本発明の第1の実施形態からなるハイブリッド車両を示す。このハイブリッド車両(以下、「HEV」という。)1Aは、左右一対の駆動輪2、2に駆動力を伝達する出力軸3に、変速機4を介して連結するディーゼルエンジン5及び走行モータ6と、その走行モータ6にインバータ7を通じて電気的に接続するバッテリー8とを有するハイブリッドシステム9を備えている。変速機4とディーゼルエンジン5との間には、湿式多板クラッチ10及び流体継手11が順に設けられている。また、変速機4と走行モータ6との間には、駆動力を断接するモータ用クラッチ12が介設されている。
FIG. 1 shows a hybrid vehicle according to the first embodiment of the present invention. This hybrid vehicle (hereinafter referred to as “HEV”) 1A includes a diesel engine 5 and a travel motor 6 that are connected via a transmission 4 to an output shaft 3 that transmits a driving force to a pair of left and right drive wheels 2 and 2. A hybrid system 9 having a battery 8 electrically connected to the traveling motor 6 through an inverter 7 is provided. A wet multi-plate clutch 10 and a fluid coupling 11 are sequentially provided between the transmission 4 and the diesel engine 5. In addition, a motor clutch 12 that connects and disconnects the driving force is interposed between the transmission 4 and the traveling motor 6.
上記のハイブリッドシステム9は、制御手段であるECU13に信号線(一点鎖線で示す)を通じて接続している。
The hybrid system 9 is connected to the ECU 13 as a control means through a signal line (indicated by a one-dot chain line).
このようなHEV1AにおけるECU13による第1の実施形態からなる制御方法を、図2に基づいて以下に説明する。
A control method according to the first embodiment performed by the ECU 13 in the HEV 1A will be described below with reference to FIG.
ECU13は、HEV1Aが暖機運転時であるかを判定し(S10)、暖機運転時である場合には、モータ用クラッチ12を接続し、かつ走行モータ6を発電機として使用してインバータ7を通じてバッテリー8を充電する(S12)。この操作により、ディーゼルエンジン5の負荷が増加し、高負運転状態となって発生する熱量が増えるため、ディーゼルエンジン5の暖機が促進される。また、ディーゼルエンジン5の回転エネルギーの一部が、電力となってバッテリー8に充電されるため、HEV1Aの燃費の悪化を抑制することができる。
The ECU 13 determines whether the HEV 1A is in a warm-up operation (S10). If the HEV 1A is in a warm-up operation, the ECU 13 connects the motor clutch 12 and uses the travel motor 6 as a generator to generate an inverter 7 The battery 8 is charged through (S12). This operation increases the load of the diesel engine 5 and increases the amount of heat generated in the high negative operation state, so that warming up of the diesel engine 5 is promoted. In addition, since a part of the rotational energy of the diesel engine 5 is charged into the battery 8 as electric power, it is possible to suppress the deterioration of the fuel efficiency of the HEV 1A.
次に、バッテリー8が定格最大容量まで充電されたかを判定し(S16)、定格最大容量であるときにはインバータ7を制御してバッテリー8への充電を停止する(S18)。なお、バッテリー8の定格最大容量とは、バッテリー8の仕様に応じて予め規定された値であり、例えば蓄電率(SOC)が70~90%となる状態である。
Next, it is determined whether or not the battery 8 has been charged to the maximum rated capacity (S16), and when it is the maximum rated capacity, the inverter 7 is controlled to stop charging the battery 8 (S18). The rated maximum capacity of the battery 8 is a value defined in advance according to the specifications of the battery 8, for example, a state where the storage rate (SOC) is 70 to 90%.
そして、ディーゼルエンジン5の各部が適正な温度に達したかを判定し(S20)、適正な温度であるときにはディーゼルエンジン5の暖機が完了したと判断して(S22)、モータ用クラッチ12を断絶する(S24)。このディーゼルエンジン5の各部の温度としては、例えば、冷却水の温度や潤滑油(エンジンオイル)の温度などが挙げられる。
Then, it is determined whether each part of the diesel engine 5 has reached an appropriate temperature (S20). When the temperature is at an appropriate temperature, it is determined that the diesel engine 5 has been warmed up (S22), and the motor clutch 12 is turned on. Disconnect (S24). Examples of the temperature of each part of the diesel engine 5 include the temperature of cooling water and the temperature of lubricating oil (engine oil).
以上のようなECU13による制御を行うことで、燃費を悪化させることなくディーゼルエンジン5の暖機を促進することができるのである。
By performing the control by the ECU 13 as described above, the warm-up of the diesel engine 5 can be promoted without deteriorating the fuel consumption.
図3は、本発明の第2の実施形態からなるハイブリッド車両を示す。なお、図1と同じ部分には同一の符号を付し、説明を省略する。
FIG. 3 shows a hybrid vehicle according to the second embodiment of the present invention. In addition, the same code | symbol is attached | subjected to the same part as FIG. 1, and description is abbreviate | omitted.
このHEV1Bにおいては、ディーゼルエンジン5からの排ガスGが流れる排気通路14に、排気ブレーキを構成する排気絞り弁15が介設されている。HEV1Bの制動時においては、この排気絞り弁15を閉弁してディーゼルエンジン5の排気圧力を高めることで、ポンピングロスを増加させて大きな制動力を得るようになっている。
In the HEV 1B, an exhaust throttle valve 15 constituting an exhaust brake is interposed in an exhaust passage 14 through which exhaust gas G from the diesel engine 5 flows. During braking of the HEV 1B, the exhaust throttle valve 15 is closed to increase the exhaust pressure of the diesel engine 5, thereby increasing the pumping loss and obtaining a large braking force.
また、ディーゼルエンジン5には、エンジン内の冷却水の温度を測定する冷却水温度計16と、エンジンオイルの温度を測定するオイル温度計17とが設置されている。更に、HEV1Bの周辺の外気温を測定する外気温度計18が設けられている。
The diesel engine 5 is provided with a cooling water thermometer 16 for measuring the temperature of the cooling water in the engine and an oil thermometer 17 for measuring the temperature of the engine oil. Furthermore, an outside air thermometer 18 for measuring the outside air temperature around the HEV 1B is provided.
上記の排気絞り弁15、及び3台の温度計16、17、18は、それぞれECU13に信号線を通じて接続している。
The exhaust throttle valve 15 and the three thermometers 16, 17, 18 are connected to the ECU 13 through signal lines, respectively.
このようなHEV1BにおけるECU13による第2の実施形態からなる制御方法では、図4に示すように、バッテリー8を充電した(S12)後に、所定の要件が満たされたときに(S13)、排気ブレーキを起動して排気絞り弁15を閉弁する(S14)。
In such a control method according to the second embodiment by the ECU 13 in the HEV 1B, as shown in FIG. 4, after the battery 8 is charged (S12), when a predetermined requirement is satisfied (S13), the exhaust brake And the exhaust throttle valve 15 is closed (S14).
このように排気絞り弁15を閉弁して排気通路14を閉止することで、高温の排ガスGが燃焼室内に残留して燃焼温度が上昇するため、ディーゼルエンジン5の暖機が更に促進される。
By closing the exhaust throttle valve 15 and closing the exhaust passage 14 in this way, the high-temperature exhaust gas G remains in the combustion chamber and the combustion temperature rises, so that the warm-up of the diesel engine 5 is further promoted. .
この排気絞り弁15を閉弁する所定の要件としては、冷却水温度計16、オイル温度計17及び外気温度計18から選ばれる少なくとも1台の温度計16/17/18の測定値が、予め設定されたしきい値未満である場合が好ましく例示される。
The predetermined requirement for closing the exhaust throttle valve 15 is that a measured value of at least one thermometer 16/17/18 selected from the cooling water thermometer 16, the oil thermometer 17, and the outside air thermometer 18 is previously set. The case where it is less than the set threshold value is preferably exemplified.
このしきい値としては、ハイブリッド自動車の場合には、例えば冷却水温度は-20~0℃、エンジンオイルの温度は-20~0℃及び外気温は-20~0℃の範囲の値となる。
In the case of a hybrid vehicle, for example, the threshold value is in the range of -20 to 0 ° C for the coolant temperature, -20 to 0 ° C for the engine oil, and -20 to 0 ° C for the outside air temperature. .
なお、ECU13は、ステップ13のように所定の要件の有無を判断する代わりに、HEV1Bのドライバーにより操作されるスイッチがオンとなったときに排気絞り弁15を閉弁するようにしてもよい。
The ECU 13 may close the exhaust throttle valve 15 when a switch operated by the driver of the HEV 1B is turned on instead of determining whether or not there is a predetermined requirement as in step 13.
そして、暖機が完了した(S22)後は、排気絞り弁15を開弁する(S26)。
Then, after the warm-up is completed (S22), the exhaust throttle valve 15 is opened (S26).
以上のように、第2の実施形態からなる制御方法では、第1の実施形態からなる制御方法よりも、ディーゼルエンジン5の暖機を急速に行うことができる。従って、ポンピングロスによるエネルギー損失はあるが、このように暖機が急速に行われるので、総合的には燃費の悪化を更に抑制することができるのである。
As described above, in the control method according to the second embodiment, the diesel engine 5 can be warmed up more rapidly than the control method according to the first embodiment. Accordingly, although there is energy loss due to pumping loss, warm-up is performed rapidly in this way, so that overall deterioration of fuel consumption can be further suppressed.
1A、1B HEV
5 ディーゼルエンジン
6 走行モータ
8 バッテリー
12 モータ用クラッチ
13 ECU
14 排気通路
15 排気絞り弁
16 冷却水温度計
17 オイル温度計
18 外気温度計 1A, 1B HEV
5Diesel Engine 6 Traveling Motor 8 Battery 12 Motor Clutch 13 ECU
14Exhaust passage 15 Exhaust throttle valve 16 Cooling water thermometer 17 Oil thermometer 18 Outside air thermometer
5 ディーゼルエンジン
6 走行モータ
8 バッテリー
12 モータ用クラッチ
13 ECU
14 排気通路
15 排気絞り弁
16 冷却水温度計
17 オイル温度計
18 外気温度計 1A, 1B HEV
5
14
Claims (5)
- バッテリーに接続された電動モータ及びエンジンの少なくとも一方を駆動源とするハイブリッドシステムと、前記ハイブリッドシステムを制御する制御手段とを備えたハイブリッド車両において、
前記制御手段は、前記エンジンの暖機運転時に、該エンジンの駆動力の一部により前記走行モータを駆動して発電させ、その発電された電力で前記バッテリーを充電することを特徴とするハイブリッド車両。 In a hybrid vehicle comprising a hybrid system having at least one of an electric motor and an engine connected to a battery as a drive source, and a control means for controlling the hybrid system,
The control means drives the running motor with a part of the driving force of the engine to generate electric power during warm-up operation of the engine, and charges the battery with the generated electric power. . - 前記エンジンの排気通路に排気絞り弁を介設し、前記制御手段は、前記エンジンの暖機運転時に前記排気絞り弁を閉弁する請求項1に記載のハイブリッド車両。 The hybrid vehicle according to claim 1, wherein an exhaust throttle valve is provided in an exhaust passage of the engine, and the control means closes the exhaust throttle valve during warm-up operation of the engine.
- 前記制御手段は、前記ハイブリッド車両のドライバーにより操作されるスイッチがオンである場合に、又は前記エンジン内の冷却水の温度、前記エンジンの潤滑油の温度及び前記ハイブリッド車両の外気温から選ばれる少なくとも1つが予め設定されたしきい値未満である場合に、前記排気絞り弁を閉弁する請求項2に記載のハイブリッド車両。 The control means is selected when at least a switch operated by a driver of the hybrid vehicle is on, or selected from the temperature of cooling water in the engine, the temperature of lubricating oil of the engine, and the outside temperature of the hybrid vehicle The hybrid vehicle according to claim 2, wherein the exhaust throttle valve is closed when one is less than a preset threshold value.
- バッテリーに接続された電動モータ及びエンジンの少なくとも一方を駆動源とするハイブリッドシステムを備えたハイブリッド車両の制御方法において、
前記エンジンの暖機運転時に、該エンジンの駆動力の一部により前記走行モータを駆動し、該走行モータが発電した電力で前記バッテリーを充電することを特徴とするハイブリッド車両の制御方法。 In a control method of a hybrid vehicle including a hybrid system using at least one of an electric motor connected to a battery and an engine as a drive source,
A control method for a hybrid vehicle, wherein, during warm-up operation of the engine, the travel motor is driven by a part of the driving force of the engine, and the battery is charged with electric power generated by the travel motor. - 前記エンジンの暖機運転時に、該エンジンの排気通路を閉止する請求項4に記載のハイブリッド車両の制御方法。 The method for controlling a hybrid vehicle according to claim 4, wherein the exhaust passage of the engine is closed during the warm-up operation of the engine.
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