WO2014109065A1 - ハイブリッド車両の制御装置および制御方法 - Google Patents
ハイブリッド車両の制御装置および制御方法 Download PDFInfo
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- WO2014109065A1 WO2014109065A1 PCT/JP2013/050493 JP2013050493W WO2014109065A1 WO 2014109065 A1 WO2014109065 A1 WO 2014109065A1 JP 2013050493 W JP2013050493 W JP 2013050493W WO 2014109065 A1 WO2014109065 A1 WO 2014109065A1
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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
- B60K6/442—Series-parallel switching type
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W10/00—Conjoint control of vehicle sub-units of different type or different function
- B60W10/04—Conjoint control of vehicle sub-units of different type or different function including control of propulsion units
- B60W10/06—Conjoint control of vehicle sub-units of different type or different function including control of propulsion units including control of combustion engines
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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
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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
- B60W20/20—Control strategies involving selection of hybrid configuration, e.g. selection between series or parallel configuration
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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
- B60W50/00—Details of control systems for road vehicle drive control not related to the control of a particular sub-unit, e.g. process diagnostic or vehicle driver interfaces
- B60W2050/0001—Details of the control system
- B60W2050/0019—Control system elements or transfer functions
- B60W2050/002—Integrating means
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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
- B60W2510/00—Input parameters relating to a particular sub-units
- B60W2510/06—Combustion engines, Gas turbines
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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
- B60W2510/00—Input parameters relating to a particular sub-units
- B60W2510/08—Electric propulsion units
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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
- B60W2510/00—Input parameters relating to a particular sub-units
- B60W2510/08—Electric propulsion units
- B60W2510/085—Power
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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
- B60W2510/00—Input parameters relating to a particular sub-units
- B60W2510/24—Energy storage means
- B60W2510/242—Energy storage means for electrical energy
- B60W2510/244—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
- B60W2510/00—Input parameters relating to a particular sub-units
- B60W2510/24—Energy storage means
- B60W2510/242—Energy storage means for electrical energy
- B60W2510/246—Temperature
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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
- B60W2520/00—Input parameters relating to overall vehicle dynamics
- B60W2520/10—Longitudinal speed
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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
- B60W2540/00—Input parameters relating to occupants
- B60W2540/10—Accelerator pedal position
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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
- B60W2710/06—Combustion engines, Gas turbines
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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
- B60W2710/08—Electric propulsion units
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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
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/62—Hybrid vehicles
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S903/00—Hybrid electric vehicles, HEVS
- Y10S903/902—Prime movers comprising electrical and internal combustion motors
- Y10S903/903—Prime movers comprising electrical and internal combustion motors having energy storing means, e.g. battery, capacitor
- Y10S903/93—Conjoint control of different elements
Definitions
- the present invention relates to a control device and a control method for a hybrid vehicle.
- the hybrid vehicle can be driven by a plurality of energy sources such as electric power and fuel, and can be driven in various driving modes depending on the energy source to be used.
- a travel mode of the hybrid vehicle for example, an EV travel mode in which the motor is driven only by the electric power of the battery, a series travel mode in which the motor is driven by the power generated by the generator by the power of the internal combustion engine, and Further, there is an engine running mode in which driving wheels are driven directly by an internal combustion engine.
- a hybrid vehicle that can travel while switching between these travel modes has been proposed (see, for example, Patent Document 1).
- the travel mode is switched from the single operation of the electric motor (EV travel mode) to the single operation of the internal combustion engine (engine travel mode) as the required torque increases.
- EV travel mode electric motor
- engine travel mode the single operation of the internal combustion engine
- the switching of the traveling mode is performed from the EV traveling mode to the series traveling mode and from the series traveling mode to the EV traveling mode. Is preferred.
- the capacitor cannot output the required power corresponding to the required torque depending on the remaining capacity (SOC: State : Of Charge) of the capacitor and the temperature. Nevertheless, since the vehicle travels in the EV travel mode, drivability may be deteriorated. Moreover, in such a case, there was a possibility that the battery would be overdischarged.
- the present invention has been made in view of the above-described problems, and an object thereof is to provide a hybrid vehicle control device and control method capable of improving energy efficiency and drivability.
- an invention according to claim 1 includes an internal combustion engine (for example, an internal combustion engine 109 in an embodiment described later), an electric motor (for example, an electric motor 101 in an embodiment described later), and the internal combustion engine.
- a generator for example, a generator 107 in an embodiment described later
- a capacitor that stores electric power generated by the electric motor or the generator and supplies electric power to the electric motor (for example, an embodiment described later)
- the electric power is generated by the generator using the EV driving mode in which the electric motor is driven only by the electric power of the electric accumulator and the power of the internal combustion engine.
- the vehicle can be driven in a series driving mode in which the electric motor is driven by electric power that is A required driving force deriving unit (for example, a management ECU 119 in an embodiment described later) for deriving the required driving force of the electric motor based on the pedal opening, and a request for deriving the required electric power based on the required driving force and the rotation speed of the electric motor
- a required driving force deriving unit for example, a management ECU 119 in an embodiment described later
- An EV output upper limit that derives an EV output upper limit that is the maximum value that can be output from the battery, based on a power deriving unit (for example, a management ECU 119 in an embodiment described later), the remaining capacity of the battery and the temperature of the battery.
- An EV output permission value deriving unit (for example, a management ECU 119 in an embodiment described later) that derives an EV output permission value from the upper limit value of the output, and at least the required power, the EV output upper limit value, and the EV output permission value
- An internal combustion engine operation suitability deriving unit (for example, a management ECU 119 in an embodiment described later) that derives the internal combustion engine operation suitability based on the internal combustion engine operation suitability while the internal combustion engine is stopped is a first predetermined value.
- An internal combustion engine starting unit (for example, a management ECU 119 in an embodiment described later) that starts the internal combustion engine when the value exceeds the value, and during operation of the internal combustion engine, an integrated value of the internal combustion engine operation suitability is the first predetermined value
- An internal combustion engine stop portion that stops the internal combustion engine when it falls below a second predetermined value lower than the value (for example, in an embodiment described later)
- Nejimento ECU 119 characterized in that it comprises a.
- the internal combustion engine operation compatibility deriving unit is a membership set based on the EV output upper limit value and the EV output permission value.
- a fitness degree deriving unit for example, management ECU 119 in an embodiment described later
- the fitness level deriving unit derives the internal combustion engine operation fitness level based at least on the EV travel mode fitness level and the series travel mode fitness level.
- the internal combustion engine operation suitability deriving unit derives an EV adaptability coefficient based on the accelerator pedal opening and a brake pedal depression force.
- the EV output upper limit value and the EV output permission value are calculated based on a remaining capacity of the battery and a temperature of the battery. It is characterized by being set by the smaller value among the values derived based on each.
- the invention according to claim 5 is the hybrid vehicle control device according to any one of claims 1 to 4, wherein the EV output upper limit value and the EV output permission value are set smaller as the remaining capacity of the battery decreases. It is characterized by being.
- the EV output upper limit value and the EV output permission value are set smaller as the temperature of the battery decreases. It is characterized by that.
- the internal combustion engine stop unit is configured such that an integrated value of the internal combustion engine operation suitability is obtained during operation of the internal combustion engine.
- the internal combustion engine is stopped when it is below the second predetermined value and the remaining capacity of the battery is greater than or equal to a predetermined value.
- the internal combustion engine stop unit is configured such that an integrated value of the internal combustion engine operation suitability is the second predetermined value during operation of the internal combustion engine.
- the internal combustion engine is stopped when the remaining capacity of the battery is not less than the predetermined value and the maximum value that can be output by the battery is not less than a predetermined value.
- the invention according to claim 9 is an internal combustion engine, an electric motor, a generator that generates electric power by the power of the internal combustion engine, and a battery that stores electric power generated by the electric motor or the electric generator and supplies electric power to the electric motor.
- the hybrid vehicle includes: an EV travel mode in which the electric motor is driven only by electric power of the battery; and the electric power generated by the generator by the power of the internal combustion engine.
- the start and stop of the internal combustion engine are determined according to the EV output upper limit value, the EV output permission value and the required power set according to the state of the battery.
- the required power can be ensured, and the battery can be prevented from being overdischarged, and the energy efficiency can be improved.
- the start and stop of the internal combustion engine are determined based on the integrated value of the internal combustion engine operation suitability and the threshold value having the hysteresis width, the internal combustion engine is not unnecessarily controlled. This makes it possible to perform more accurate control based on the user's will.
- FIG. 3 is an explanatory diagram showing a detailed configuration of a MOT required power derivation block shown in FIG. 2. It is explanatory drawing which shows the detailed structure of the ENG GEN control block shown in FIG.
- FIG. 3 is a schematic diagram showing a detailed configuration of an ENG start determination block shown in FIG. 2. It is a schematic diagram which shows the detailed structure of the ENG stop determination block shown in FIG. It is explanatory drawing of driving mode adaptation estimation. It is explanatory drawing of EV output upper limit and EV output permission value.
- FIG. 1 is a schematic diagram showing an internal configuration of an HEV (hereinafter simply referred to as “vehicle”) of the present embodiment.
- the vehicle 1 includes left and right drive wheels DW and DW, an electric motor (MOT) 101, a first inverter (IINV) 103, and a second inverter (IIINV) 105.
- MOT electric motor
- IINV first inverter
- IIINV second inverter
- VCU bidirectional buck-boost converter
- the electric motor 101 is, for example, a three-phase AC motor.
- the electric motor 101 generates power (torque) for the vehicle to travel. Torque generated by the electric motor 101 is transmitted to the drive shafts of the drive wheels DW and DW.
- the electric motor 101 functions as a generator to generate a so-called regenerative braking force, thereby reducing the kinetic energy of the vehicle. It collects as electric energy (regenerative energy) and charges the battery 113.
- the motor ECU 121 controls the operation and state of the electric motor 101 in response to an instruction from the management ECU 119.
- a multi-cylinder internal combustion engine (hereinafter simply referred to as “internal combustion engine”) 109 causes the generator 107 to generate electric power using the power of the internal combustion engine 109 when the clutch 115 is disengaged.
- the internal combustion engine 109 generates power (torque) for traveling of the vehicle in a state where the clutch 115 is connected. Torque generated in the internal combustion engine 109 in this state is transmitted to the drive shafts of the drive wheels DW and DW via the generator 107 and the clutch 115.
- the engine ECU 125 controls the start and stop of the internal combustion engine 109 and the rotation speed in accordance with a command from the management ECU 119.
- the generator 107 is driven by the internal combustion engine 109 to generate electric power.
- the AC voltage generated by the generator 107 is converted into a DC voltage by the second inverter 105.
- the DC voltage converted by the second inverter 105 is stepped down by the converter 111 and charged in the battery 113 or is converted to an AC voltage via the first inverter 103 and then supplied to the electric motor 101.
- the generator ECU 127 controls the number of revolutions and the amount of power generation of the generator 107 in accordance with a command from the management ECU 119.
- the storage battery 113 has a plurality of storage cells connected in series, and supplies a high voltage of, for example, 100 to 200V.
- the voltage of the battery 113 is boosted by the converter 111 and supplied to the first inverter 103.
- the first inverter 103 converts the DC voltage from the battery 113 into an AC voltage and supplies a three-phase current to the electric motor 101.
- Information such as the SOC and temperature of the battery 113 is input to the battery ECU 123 from a sensor (not shown). These pieces of information are sent to the management ECU 119.
- the clutch 115 disconnects or connects (disconnects) the driving force transmission path from the internal combustion engine 109 to the drive wheels DW and DW based on an instruction from the management ECU 119. If the clutch 115 is in the disconnected state, the driving force from the internal combustion engine 109 is not transmitted to the driving wheels DW and DW, and if the clutch 115 is in the connected state, the driving force from the internal combustion engine 109 is applied to the driving wheels DW and DW. Communicated.
- the auxiliary machine 117 is, for example, a compressor of an air conditioner that adjusts the passenger compartment temperature, an audio, a light, or the like, and operates with electric power supplied from the battery 113.
- the power consumption of the auxiliary machine 117 is monitored by a sensor (not shown) and is sent to the management ECU 119.
- the management ECU 119 switches the driving force transmission system and controls and monitors driving of the electric motor 101, the first inverter 103, the second inverter 105, the internal combustion engine 109, and the auxiliary machine 117.
- the management ECU 119 also includes vehicle speed information from a vehicle speed sensor (not shown), accelerator pedal opening (AP opening) information, brake pedal depression information (not shown), shift range and HEV (not shown). Information from the switch and the charge switch is input.
- the management ECU 119 instructs the motor ECU 121, the battery ECU 123, the engine ECU 125, and the generator ECU 127.
- the vehicle 1 can implement the “SOC recovery mode” by the user operating a charging switch (not shown).
- SOC recovery mode it is possible to increase the SOC of the battery 113 by controlling the internal combustion engine 109 so as to increase the amount of power generated by the power generator 107 and controlling charging / discharging of the battery 113.
- the vehicle 1 configured as described above can travel in various travel modes having different drive sources, such as “EV travel mode”, “series travel mode”, and “engine travel mode”, for example, depending on the travel situation. is there.
- EV travel mode “series travel mode”
- engine travel mode for example, depending on the travel situation. is there.
- each traveling mode in which the vehicle 1 can travel will be described.
- the electric motor 101 In the EV travel mode, the electric motor 101 is driven only by the electric power from the battery 113, thereby driving the drive wheels DW and DW, and the vehicle 1 travels. At this time, the internal combustion engine 109 is not driven, and the clutch 115 is in a disconnected state.
- This series running mode includes a “battery input / output zero mode”, “driving charge mode”, and “assist mode” described below.
- the electric power generated by the electric generator 107 by the power of the internal combustion engine 109 is supplied to the electric motor 101 via the second inverter 105 and the first inverter 103, whereby the electric motor 101 is driven and driven.
- the wheels DW and DW are driven, and the vehicle 1 travels. That is, the generator 107 generates only the required power, and power input / output to the battery 113 is not substantially performed.
- the electric power generated by the generator 107 by the power of the internal combustion engine 109 is directly supplied to the electric motor 101 to drive the electric motor 101, drive the driving wheels DW and DW, and the vehicle 1 travels. To do.
- the electric power generated by the generator 107 by the power of the internal combustion engine 109 is also supplied to the battery 113, and the battery 113 is charged. That is, the generator 107 generates more than the required power of the electric motor 101, and the required electric power is supplied to the electric motor 101, while the surplus is charged to the capacitor 113.
- the vehicle travels in the assist mode.
- the assist mode by supplying both the electric power generated by the generator 107 with the power of the internal combustion engine 109 and the electric power from the battery 113 to the electric motor 101, the electric motor 101 is driven and the driving wheels DW and DW are driven. The vehicle 1 travels.
- the drive wheels DW and DW are directly driven by the power of the internal combustion engine 109, and the vehicle 1 travels.
- the power generator 107 is driven to rotate together with the rotating shaft of the internal combustion engine 109 by supplying power from the battery 113.
- the hybrid vehicle control apparatus is suitable for the EV travel mode or the series travel mode based on the required power of the electric motor 101 corresponding to the required driving force of the vehicle 1. Judging.
- the internal combustion engine 109 is started to switch from the EV travel mode to the series travel mode.
- the internal combustion engine 109 is stopped and switched from the series travel mode to the EV travel mode.
- FIG. 2 is an explanatory diagram showing a detailed configuration of the hybrid vehicle control device shown in FIG. 1.
- the management ECU 119 derives the required driving force F of the electric motor 101 necessary for driving the vehicle based on the accelerator pedal opening, the vehicle speed, the shift range state, the pedaling force information of the brake pedal, and the like (required driving force). Deriving unit 11).
- the management ECU 119 derives a required torque T of the electric motor 101 based on a value obtained by passing the obtained required driving force F through a low-pass filter (not shown) (MOT required torque deriving unit 12).
- the management ECU 119 based on the required torque T of the motor 101, the voltage (VCU output voltage) supplied after being boosted by the converter 111, and the current rotation speed (MOT rotation speed) of the motor 101, the management ECU 119 The required power P is derived (MOT required power deriving unit 13).
- FIG. 3 is an explanatory diagram showing a detailed configuration of the MOT required power deriving unit 13.
- the management ECU 119 calculates a MOT axis output command that is a value to be output by the motor 101 based on the required torque and rotation speed of the motor 101 (MOT axis output command calculation block 21).
- the MOT axis output command is calculated based on the following equation (1).
- MOT axis output command (kW) MOT required torque (N) ⁇ MOT rotation speed (rpm) ⁇ 2 ⁇ / 60 (1)
- the management ECU 119 derives a loss generated in the motor 101 by searching a loss map stored in a memory (not shown) based on the required torque T of the motor 101, the rotation speed of the motor 101, and the VCU output voltage. (Motor loss deriving block 22).
- This motor loss includes all possible losses such as switching loss, thermal loss, and loss in a converter.
- the management ECU 119 derives the required power P of the motor 101 in consideration of the loss by adding the motor shaft output command and the motor loss (required power derivation block 23).
- the management ECU 119 determines whether or not the operation of the internal combustion engine 109 is requested based on the derived required power P of the electric motor 101, that is, whether the internal combustion engine 109 is requested to start or stop. A determination is made (ENG start / stop determination unit 14). When there is an operation request (ENG operation request) for the internal combustion engine 109, the internal combustion engine 109 and the generator 107 are controlled (ENG GEN control unit 17).
- FIG. 4 is an explanatory diagram showing a detailed configuration of the ENG GEN control unit 17.
- the management ECU 119 should generate power from the generator 107 to supply the required power of the electric motor 101 based on the required electric power P of the electric motor 101 and the voltage (VCU output voltage) boosted and supplied by the converter 111.
- An MOT required power generation output value that is an output value is derived (MOT required power generation output value deriving block 31).
- the target SOC (target SOC) is set in the battery 113, and it is desirable to charge the battery when the current SOC is lower than the target SOC. Therefore, the management ECU 119 derives a required charge output value corresponding to the amount of charge required to reach the target SOC based on the current SOC of the battery 113 (required charge output value derivation block 32). Then, the management ECU 119 derives a required power generation output value by adding the MOT required power generation output value and the required charge output value (required power generation output value derivation block 33).
- the management ECU 119 searches a BSFC (Brake Specific Fuel Consumption) map regarding the rotation speed of the internal combustion engine 109 based on the derived required power generation output value, and determines the internal combustion engine 109 corresponding to the required power generation output value.
- An engine speed target value is derived (ENG engine speed target value deriving block 34). This ENG rotational speed target value is the rotational speed with the highest fuel efficiency corresponding to the required power generation output value.
- the internal combustion engine 109 uniquely determines the fuel injection amount in accordance with the intake air amount, It is difficult to control the rotational speed so that it matches the ENG rotational speed target value.
- the generator ECU 127 controls the rotational speed and torque of the generator 107 connected to the crankshaft (not shown) of the internal combustion engine 109 and adjusts the amount of power generated by the generator 107, thereby rotating the internal combustion engine 109. Control the number. Therefore, the ENG rotation speed target value is converted into the rotation speed of the generator 107 (GEN rotation speed conversion block 35), the rotation of the generator 107 is controlled (GEN rotation control block 36), and the GEN torque command is sent to the generator ECU 127. (GEN torque command block 37).
- the management ECU 119 searches a BSFC map related to the torque of the internal combustion engine 109 based on the derived required power generation output value, and derives a torque target value of the internal combustion engine 109 corresponding to the required power generation output value (ENG torque target). Value derivation block 38). Based on this ENG torque target value, the management ECU 119 sends an ENG torque command to the engine ECU 125 (GEN torque command block 39). The management ECU 119 calculates the throttle opening based on the derived torque target value, the current rotational speed of the internal combustion engine 109, and the estimated intake air amount based on these values (TH opening calculation block 40). Then, the management ECU 119 performs DBW (drive-by-wire) control based on the derived throttle opening command (TH opening command block 41) (DBW block 42). As a result, the vehicle 1 travels in the series travel mode.
- DBW drive-by-wire
- the EV running is performed by supplying the electric power of the battery 113 to the electric motor 101 without operating the internal combustion engine 109. Drive in mode. Therefore, control of the internal combustion engine 109 and the generator 107 is not performed.
- the management ECU 119 sends a torque command for the motor 101 to the motor ECU 121 based on the required torque T derived by the MOT required torque deriving unit 12 (MOT torque command unit 18).
- the motor ECU 121 controls the electric motor 101 based on the MOT torque command.
- Information regarding the current operating state of the internal combustion engine 109 is input to the ENG start / stop determination unit 14.
- ENG start determination unit 15 When the internal combustion engine 109 is currently stopped, it is determined whether or not the internal combustion engine 109 is to be started (ENG start determination unit 15).
- ENG stop determination unit 16 When the internal combustion engine 109 is currently operating, it is determined whether or not to stop the internal combustion engine 109 (ENG stop determination unit 16).
- FIG. 5 is an explanatory diagram showing a detailed configuration of the ENG start determination unit 15.
- the management ECU 119 determines that there is a request for starting the internal combustion engine 109 when one of the conditions described later is satisfied (ENG start request block 57).
- ENG start request block 57 a request for starting the internal combustion engine 109 when one of the conditions described later is satisfied.
- air conditioning request determination block 51 when there is an air conditioning request such as an air conditioner or heating, a large amount of electric power is consumed by the capacitor 113, and heating is highly necessary to start the internal combustion engine 109 in order to use the heat generated by the internal combustion engine 109. . Accordingly, when there is an air conditioning request such as an air conditioner or heating, it is determined that there is a request to start the internal combustion engine 109 (air conditioning request determination block 51). This determination may be made when there is a request for air conditioning such as an air conditioner or heating, and there is a request for starting the internal combustion engine 109 when the temperature of the cooling water of the internal combustion engine 109 is lower than a predetermined value.
- the SOC of the battery 113 when the SOC of the battery 113 is low, it is difficult to travel in the EV travel mode because sufficient output cannot be obtained from the battery 113, and it is necessary to charge the internal combustion engine 109 for charging. high. Therefore, when the SOC of the battery 113 is lower than the predetermined threshold value Sth, it is determined that there is a request for starting the internal combustion engine 109 (SOC determination block 52). In this case, in order to prevent frequent start and stop of the internal combustion engine 109, the determination is made based on a threshold value having a certain hysteresis width.
- the generator 107 when the “SOC recovery mode” is performed by the operation of the charging switch by the user, in order to increase the SOC of the battery 113, the generator 107 generates electric power with the driving force of the internal combustion engine 109, and the series running The need to do is high. Therefore, it is determined that there is a request for starting the internal combustion engine 109 during the SOC recovery mode (SOC recovery mode determination block 54).
- fuzzy determination block 55 if it is determined that it is suitable for the series travel mode, a request for starting the internal combustion engine 109 is issued. It is determined that it exists (series matching block 56).
- FIG. 6 is an explanatory diagram showing a detailed configuration of the ENG stop determination unit 16.
- the management ECU 119 determines that there is a request to stop the internal combustion engine 109 only when all the conditions described later are satisfied (ENG stop request block 66). Hereinafter, these conditions will be described in detail.
- the SOC of the battery 113 needs to be high to some extent. Therefore, when the SOC of the battery 113 is equal to or less than the predetermined threshold value Sth, it is determined that there is no request to stop the internal combustion engine 109 (SOC determination block 61).
- This threshold value Sth has a certain hysteresis width, and prevents frequent starting and stopping of the internal combustion engine 109.
- SOC of the battery 113 exceeds the threshold value Sth, it is determined whether other conditions are satisfied.
- the SOC of the battery 113 is greater than or equal to a predetermined value, a sufficient output may not be obtained from the battery 113 depending on the deterioration state and temperature of the battery 113. Therefore, when the maximum value that can be output from the battery 113 is equal to or less than the predetermined threshold value Pth, it is determined that there is no request to stop the internal combustion engine 109 (battery output determination block 62). When the output of the battery 113 exceeds the threshold value Pth, it is determined whether other conditions are satisfied.
- the internal combustion engine 109 is stopped while the internal combustion engine 109 is performing the warm-up operation, the temperature of the catalyst is not sufficiently increased, and there is a possibility that sufficient purification performance cannot be obtained. Therefore, when the internal combustion engine 109 is in the warm-up operation, it is determined that there is no request for stopping the internal combustion engine 109 (warm-up operation determination block 63). When the internal combustion engine 109 is not warming up, it is determined whether other conditions are satisfied.
- fuzzy determination block 64 determines whether the vehicle is compatible with the series travel mode. If it is determined that there is no request to stop the internal combustion engine 109. As a result of the fuzzy determination, it is determined that the vehicle is compatible with the EV traveling mode (EV compatible block 65), and when all other conditions are satisfied, it is determined that there is a request to stop the internal combustion engine 109. .
- FIG. 7 is an explanatory diagram for explaining the travel mode conformity determination in the fuzzy determination block 55 and the fuzzy determination block 64.
- management ECU119 based on the SOC and temperature of the battery 113 and sets the EV output upper limit value P U and EV output permission value P L.
- EV output upper limit value P U of the capacitor 113 is the upper limit value of the capacitor 113 is capable of supplying power while running in the EV running mode, changes depending on the SOC and temperature of the battery 113. Therefore, management ECU119 is capacitor 113 based on the respective SOC and temperature of the battery 113 to derive the maximum power that can be supplied is, sets the value of the smaller one of these values as EV output upper limit value P U of the storage battery 113 (EV output upper limit setting block 71). Note that data on the maximum power that can be supplied by the battery 113 according to the SOC and temperature of the battery 113 is obtained in advance through experiments and stored in a memory (not shown) or the like.
- EV output permission value P L is the boundary value of the contributing region to improved fuel economy better to travel in the EV travel mode, it was run in the series running mode is an area contributing to improved fuel economy is there. This value is set by the following method.
- the vehicle travels by supplying the electric power of the battery 113 to the electric motor 101.
- a loss occurs when the DC voltage of the battery 113 is converted to an AC voltage by the first inverter 103, and a loss also occurs when the electric motor 101 is driven.
- the SOC of the battery 113 decreases.
- the reduced SOC needs to be generated by the power of the internal combustion engine 109 at any time in the future and returned to the original value. is there. In such a case, a loss also occurs when the generator 107 generates power using the power of the internal combustion engine 109.
- the total loss L EV generated in the EV traveling mode is a loss generated when power is supplied from the capacitor 113 to the electric motor 101, a loss generated when the electric motor 101 is driven, and a power generation by the generator 107 later. It consists of the sum of losses that occur.
- the electric power exceeding the required power is generated by the power generator 107 by the power of the internal combustion engine 109, and the motor 101 is driven by the power to drive the vehicle.
- the generator 107 generates power with the power of the internal combustion engine 109 or when the electric motor 101 is driven, a loss occurs. Therefore, the total loss L SE generated in the series running mode, the loss generated during the power generation by the generator 107, and consists of the sum of the loss generated when driving the motor 101.
- the management ECU 119 determines the output upper limit of the capacitor 113 within a range in which the total loss L EV generated in the EV traveling mode does not exceed the total loss L SE generated in the series traveling mode based on the SOC and temperature of the capacitor 113. to derive a value, it sets a smaller one of these values as EV output permission value P L (EV output granted value setting block 72).
- the data of the upper limit value of the output in the range of L EV in accordance with the SOC and temperature of the battery 113 does not exceed L SE is stored in a memory (not shown) or the like with determined through experiments in advance.
- Figure 8 is an explanatory diagram showing an EV output upper limit value P U and EV output permission value P L.
- the horizontal axis represents the vehicle speed (km / h), and the vertical axis represents the driving force (N).
- the symbol R / L in the figure indicates the running resistance on flat ground.
- the required power P ⁇ an EV output permission value P L i.e., in the region (A) in FIG. 7, the required power P is not so large, not too larger power consumption of the battery 113 accordingly, also, The power to be generated later is not very large. Therefore, the loss generated in each is not so large, and L EV ⁇ L SE . Therefore, in the region (A), it is preferable from the aspect of fuel consumption to travel in the EV travel mode.
- FIG. 9 is an explanatory diagram for explaining the derivation of the series suitability in the fuzzy determination block 55 and the fuzzy determination block 64.
- the management ECU 119 derives an EV fitness coefficient based on the accelerator pedal opening and the brake pedal depression force (EV fitness coefficient deriving block 81).
- the EV adaptation coefficient is a negative value, and is set so that the value increases when it is suitable for traveling in the EV traveling mode.
- the EV adaptation coefficient is determined according to three cases, for example, when the accelerator pedal opening is greater than or equal to a predetermined value, when the accelerator pedal opening is less than the predetermined value, and when the brake pedal depression force is greater than or equal to the predetermined value. It is small when the accelerator pedal opening is equal to or greater than a predetermined value, and is set large when the brake pedal depression force is equal to or greater than a predetermined value.
- the management ECU 119 derives the series suitability based on the travel mode suitability (series suitability grade value and EV suitability grade value) and the EV suitability coefficient (series suitability derivation block 82). This derivation is performed based on the following formula (2), for example.
- Series conformity Series conformity grade value ⁇ EV conformity factor + EV conformance grade value ⁇ (-EV conformance factor) (2)
- the management ECU 119 performs integration of series suitability (integration block 83). This integration is performed so that the integration value takes a value between 0 and 1. Then, the management ECU 119 determines whether the derived integrated value is higher or lower than a predetermined threshold value Ith (integrated value determination block 84), thereby determining whether it is compatible with the series travel mode ( Series conformity determination block 85). Also in this case, in order to prevent frequent start and stop of the internal combustion engine 109, the determination is made based on a threshold value having a predetermined hysteresis width. Specifically, for example, when the integrated value of the series suitability exceeds 0.8 while the internal combustion engine 109 is stopped, the management ECU 119 determines that the series travel mode is adapted.
- the management ECU 119 determines that the EV travel mode is more suitable than the series travel mode only when the integrated value of the series suitability falls below 0.2. To do. In this way, by using the integrated value of the series suitability and making the determination based on the threshold value having the hysteresis width, it is possible to further prevent frequent starting and stopping of the internal combustion engine 109.
- FIG. 10 is a flowchart showing the operation of the control device for the hybrid vehicle 1 according to the present embodiment.
- the management ECU 119 derives a required driving force F of the electric motor 101 (step S1), and derives a required torque (MOT required torque) T of the electric motor 101 based on the required driving force F (step S2).
- the management ECU 119 derives a required power (MOT required power) P of the electric motor 101 based on the MOT required torque T, the MOT rotation speed, and the VCU output voltage (step S3).
- the management ECU 119 determines whether or not the internal combustion engine 109 is currently operating (step S4). If it is determined that the internal combustion engine 109 is not currently operating, the management ECU 119 determines whether or not to start the internal combustion engine 109 (ENG start determination) based on the MOT required power P (step S5).
- FIG. 11 is a flowchart showing the operation of ENG start determination.
- the management ECU 119 determines whether there is an air conditioning request such as an air conditioner or heating (step S21). When it is determined that there is no air conditioning request, the management ECU 119 determines whether the SOC (battery SOC) of the battery 113 is equal to or less than a predetermined threshold value Sth (step S22). Note that the threshold value Sth is set to have a certain hysteresis width in order to prevent frequent control switching.
- step S22 determines whether the battery SOC> Sth. If it is determined in step S22 that the battery SOC> Sth, the management ECU 119 determines whether the maximum value (battery output) that can be output by the battery 113 is equal to or less than a predetermined threshold value Pth (step S23). ). When it is determined that battery output> Pth, the management ECU 119 determines whether the vehicle 1 is currently in the SOC recovery mode (step S24). When it is determined that the vehicle 1 is not currently in the SOC recovery mode, the management ECU 119 performs a fuzzy determination (step S25).
- step S4 when it is determined in step S4 that the internal combustion engine 109 is currently operating, the management ECU 119 determines whether or not to stop the internal combustion engine 109 (ENG stop determination) based on the MOT required power P (FIG. 10). Step S10).
- FIG. 12 is a flowchart showing the ENG stop determination operation.
- the management ECU 119 determines whether the SOC of the battery 113 is lower than a predetermined threshold value Sth (step S31).
- the threshold value Sth is set to have a certain hysteresis width in order to prevent frequent control switching.
- step S31 If it is determined in step S31 that the battery SOC> Sth, the management ECU 119 determines whether the maximum value (battery output) that can be output by the battery 113 exceeds a predetermined threshold value Pth (step S32). ). When it is determined that battery output> Pth, the management ECU 119 determines whether the internal combustion engine 109 is currently warming up (step S33). When it is determined that the internal combustion engine 109 is not currently warming up, the management ECU 119 performs a fuzzy determination (step S34).
- FIG. 13 is a flowchart showing a fuzzy determination operation performed during ENG start determination and ENG stop determination.
- management ECU119 based on the temperature and SOC of the battery 113, to derive the EV output upper limit value P U and EV output permission value P L of the capacitor 113 (step S41).
- the management ECU119 from EV output upper limit value P U and EV output permission value P L, sets the travel mode adaptation judgment membership function.
- the management ECU 119 performs fuzzy inference based on the travel mode conformity determination membership function and the current required power P of the motor 101, and derives the travel mode conformity with respect to the current required power P of the motor 101 (step S42).
- the management ECU 119 derives an EV adaptability coefficient based on the accelerator pedal opening and the brake pedal depression force (step S43). Then, the management ECU 119 derives the series suitability based on the derived travel mode suitability and the EV suitability coefficient (step S44).
- the management ECU 119 performs accumulation of series suitability (step S45). Then, the management ECU 119 determines whether or not the integrated value of the ENG start request degree is equal to or greater than a predetermined threshold value Ith. In order to prevent frequent switching of control, the threshold value Ith is set to have a certain hysteresis width. If it is determined in step S45 that the integrated value ⁇ Ith, the management ECU 119 determines that the integrated travel mode is satisfied (step S47), and ends the fuzzy determination. If it is determined in step S45 that the integrated value ⁇ Ith, the management ECU 119 assumes that the EV traveling mode is satisfied (step S48), and ends the fuzzy determination.
- a predetermined threshold value Ith In order to prevent frequent switching of control, the threshold value Ith is set to have a certain hysteresis width. If it is determined in step S45 that the integrated value ⁇ Ith, the management ECU 119 determines that the integrated travel mode is satisfied (step S47), and ends the
- the management ECU 119 determines whether or not the fuzzy determination performed in step S25 is determined to be suitable for the series travel mode (step S26). If it is determined that the mode is suitable for the series travel mode, the management ECU 119 proceeds to the next process assuming that there is a request to start the internal combustion engine 109 (step S27). If it is determined in step S21 that there is an air conditioning request, if it is determined in step S22 that the battery SOC ⁇ Sth, if it is determined in step S23 that the battery output ⁇ Pth, or if the SOC recovery mode is determined in step S24.
- step S27 If it is determined that the internal combustion engine 109 is being started, the management ECU 119 proceeds to the next process assuming that there is a request for starting the internal combustion engine 109 (step S27). If it is determined in step S26 that the vehicle is in the EV travel mode, the management ECU 119 proceeds to the next process assuming that there is no request for starting the internal combustion engine 109.
- the management ECU 119 determines whether or not it is determined in the fuzzy determination performed in step S34 that the vehicle is compatible with the EV travel mode (step S35). If it is determined that the vehicle is in the EV travel mode, the management ECU 119 proceeds to the next process assuming that there is a request to stop the internal combustion engine 109 (step S36).
- step S31 when it is determined in step S31 that the battery SOC ⁇ Sth, in step S32 it is determined that the battery output ⁇ Pth, in step S33 it is determined that the warm-up operation is being performed, or in step S35. If it is determined that the vehicle is compatible with the EV travel mode, the management ECU 119 proceeds to the next process assuming that there is no request to stop the internal combustion engine 109.
- the management ECU 119 determines whether or not there is an ENG start request in the ENG start determination in step S5 (step S6).
- the internal combustion engine 109 is started (step S7) to control the internal combustion engine 109 and the generator 107 in order to drive the vehicle in the series travel mode. (Step S8).
- the electric motor 101 is controlled based on the required torque T (step S9).
- the electric motor 101 is controlled based on the required torque T in order to travel in the EV travel mode without starting the internal combustion engine 109. (Step S9).
- the management ECU 119 determines whether or not there is an ENG stop request by the ENG stop determination in step S10 (step S11). If it is determined in step S11 that there is no ENG stop request, the management ECU 119 controls the internal combustion engine 109 and the generator 107 in order to continue traveling in the series travel mode (step S8), and at the same time, requests Based on the torque T, the motor 101 is controlled (step S9). On the other hand, if it is determined in step S11 that there is an ENG stop request, the management ECU 119 stops the internal combustion engine 109 (step S12) based on the required torque T in order to travel in the EV travel mode. 101 is controlled (step S9).
- the control device and control method for a hybrid vehicle according to the EV output upper limit value, the EV output permission value, and the required power that are set according to the state of the battery 113, Since it is determined whether the internal combustion engine 109 is started or stopped, a desired required power can be ensured, and the battery 113 can be prevented from being overdischarged, and energy efficiency can be improved.
- the start and stop of the internal combustion engine 109 are determined based on the integrated value of the series suitability and the threshold value having a hysteresis width, unnecessary control of the internal combustion engine 109 is eliminated, and the user's will is drawn. More precise control is possible.
- the present invention is not limited to the above-described embodiments, and modifications, improvements, and the like can be made as appropriate.
- the internal combustion engine 109 may be controlled to start regardless of other conditions.
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Abstract
Description
MOT軸出力指令(kW)=MOT要求トルク(N)×MOT回転数(rpm)×2π/60・・・(1)
<言語的制御ルール>
(1)MOT要求電力がPLよりも小さいならばシリーズ適合グレード値は小、EV適合グレード値は大
(2)MOT要求電力がPUよりも大きいならばシリーズ適合グレード値は大、EV適合グレード値は小
シリーズ適合度
=シリーズ適合グレード値×EV適合係数+EV適合グレード値×(-EV適合係数)・・・(2)
107 発電機(GEN)
109 多気筒内燃機関(ENG)
113 蓄電器(BATT)
115 クラッチ
117 補機(ACCESSORY)
119 マネジメントECU(MG ECU)
Claims (9)
- 内燃機関と、電動機と、前記内燃機関の動力によって発電する発電機と、前記電動機又は前記発電機によって発電された電力を蓄電して前記電動機に電力を供給する蓄電器と、を備えるハイブリッド車両の制御装置であって、
前記ハイブリッド車両は、前記蓄電器の電力のみにより前記電動機を駆動するEV走行モードと、前記内燃機関の動力により前記発電機によって発電される電力により前記電動機を駆動するシリーズ走行モードと、により走行可能であり、
車速およびアクセルペダル開度に基づき前記電動機の要求駆動力を導出する要求駆動力導出部と、
前記要求駆動力および前記電動機の回転数に基づき要求電力を導出する要求電力導出部と、
前記蓄電器の残容量および前記蓄電器の温度に基づいて、前記蓄電器が出力可能な最大値であるEV出力上限値を導出するEV出力上限値導出部と、
前記蓄電器の残容量および前記蓄電器の温度に基づいて、{(EV走行モードで走行する際に発生する損失)+(EV走行モードで消費した電力を発電する際に発生する損失)}<(シリーズ走行モードで発生する損失)を満たす出力の上限値からEV出力許可値を導出するEV出力許可値導出部と、
前記要求電力、前記EV出力上限値、および前記EV出力許可値に少なくとも基づいて内燃機関運転適合度を導出する内燃機関運転適合度導出部と、
前記内燃機関の停止中、前記内燃機関運転適合度の積算値が第1所定値を超えたときに前記内燃機関を始動させる内燃機関始動部と、
前記内燃機関の運転中、前記内燃機関運転適合度の積算値が前記第1所定値よりも低い第2所定値を下回ったときに前記内燃機関を停止する内燃機関停止部と、を備えることを特徴とするハイブリッド車両の制御装置。 - 前記内燃機関運転適合度導出部は、前記EV出力上限値および前記EV出力許可値に基づいて設定されたメンバシップ関数から前記要求電力に基づいてファジー判定を行うことにより、EV走行モード適合度およびシリーズ走行モード適合度を導出する適合度導出部を有し、
前記適合度導出部は、前記EV走行モード適合度と前記シリーズ走行モード適合度とに少なくとも基づいて前記内燃機関運転適合度を導出することを特徴とする請求項1に記載のハイブリッド車両の制御装置。 - 前記内燃機関運転適合度導出部は、前記アクセルペダル開度とブレーキペダル踏力に基づいてEV適合係数を導出する係数導出部をさらに有し、
前記適合度導出部は、前記EV適合係数と前記EV走行モード適合度と前記シリーズ走行モード適合度とに基づいて前記内燃機関運転適合度を導出することを特徴とする請求項2に記載のハイブリッド車両の制御装置。 - 前記EV出力上限値および前記EV出力許可値は、前記蓄電器の残容量と前記蓄電器の温度のそれぞれに基づいて導出される値のうち、小さい方の値により設定されることを特徴とする請求項1から3のいずれか1項に記載のハイブリッド車両の制御装置。
- 前記EV出力上限値および前記EV出力許可値は、前記蓄電器の残容量が小さくなるに従って小さく設定されることを特徴とする請求項1から4のいずれか1項に記載のハイブリッド車両の制御装置。
- 前記EV出力上限値および前記EV出力許可値は、前記蓄電器の温度が低くなるに従って小さく設定されることを特徴とする請求項1から5のいずれか1項に記載のハイブリッド車両の制御装置。
- 前記内燃機関停止部は、前記内燃機関の運転中、前記内燃機関運転適合度の積算値が前記第2所定値を下回り、且つ前記蓄電器の残容量が所定値以上であるときに前記内燃機関を停止することを特徴とする請求項1から6のいずれか1項に記載のハイブリッド車両の制御装置。
- 前記内燃機関停止部は、前記内燃機関の運転中、前記内燃機関運転適合度の積算値が前記第2所定値を下回り、前記蓄電器の残容量が前記所定値以上であり、且つ前記蓄電器が出力可能な最大値が所定値以上であるときに前記内燃機関を停止することを特徴とする請求項7に記載のハイブリッド車両の制御装置。
- 内燃機関と、電動機と、前記内燃機関の動力によって発電する発電機と、前記電動機又は前記発電機によって発電された電力を蓄電して前記電動機に電力を供給する蓄電器と、を備えるハイブリッド車両の制御方法であって、
前記ハイブリッド車両は、前記蓄電器の電力のみにより前記電動機を駆動するEV走行モードと、前記内燃機関の動力により前記発電機によって発電される電力により前記電動機を駆動するシリーズ走行モードと、により走行可能であり、
車速およびアクセルペダル開度に基づき前記電動機の要求駆動力を導出するステップと、
前記要求駆動力および前記電動機の回転数に基づき要求電力を導出するステップと、
前記蓄電器の残容量および前記蓄電器の温度に基づいて、前記蓄電器が出力可能な最大値であるEV出力上限値を導出するステップと、
前記蓄電器の残容量および前記蓄電器の温度に基づいて、{(EV走行モードで走行する際に発生する損失)+(EV走行モードで消費した電力を発電する際に発生する損失)}<(シリーズ走行モードで発生する損失)を満たす出力の上限値からEV出力許可値を導出するステップと、
前記要求電力、前記EV出力上限値、および前記EV出力許可値に少なくとも基づいて内燃機関運転適合度を導出するステップと、
前記内燃機関の停止中、前記内燃機関運転適合度の積算値が第1所定値を超えたときに前記内燃機関を始動させるステップと、
前記内燃機関の運転中、前記内燃機関運転適合度の積算値が前記第1所定値よりも低い第2所定値を下回ったときに前記内燃機関を停止するステップと、を備えることを特徴とするハイブリッド車両の制御方法。
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