WO2016199275A1 - 内燃機関の始動装置、車両、及び、内燃機関の始動方法 - Google Patents
内燃機関の始動装置、車両、及び、内燃機関の始動方法 Download PDFInfo
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- WO2016199275A1 WO2016199275A1 PCT/JP2015/066916 JP2015066916W WO2016199275A1 WO 2016199275 A1 WO2016199275 A1 WO 2016199275A1 JP 2015066916 W JP2015066916 W JP 2015066916W WO 2016199275 A1 WO2016199275 A1 WO 2016199275A1
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- combustion engine
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- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
- B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
- B60L58/12—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries responding to state of charge [SoC]
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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
- B60L2240/10—Vehicle control parameters
- B60L2240/36—Temperature of vehicle components or parts
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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
- B60L2240/441—Speed
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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
- B60L2240/40—Drive Train control parameters
- B60L2240/54—Drive Train control parameters related to batteries
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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
- B60L2240/54—Drive Train control parameters related to batteries
- B60L2240/547—Voltage
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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
- B60L2240/54—Drive Train control parameters related to batteries
- B60L2240/549—Current
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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
- B60W2510/0676—Engine 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
- B60W2710/00—Output or target parameters relating to a particular sub-units
- B60W2710/08—Electric propulsion units
- B60W2710/081—Speed
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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
- F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
- F02N11/00—Starting of engines by means of electric motors
- F02N11/04—Starting of engines by means of electric motors the motors being associated with current generators
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
- F02N2200/00—Parameters used for control of starting apparatus
- F02N2200/02—Parameters used for control of starting apparatus said parameters being related to the engine
- F02N2200/022—Engine speed
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
- F02N2200/00—Parameters used for control of starting apparatus
- F02N2200/02—Parameters used for control of starting apparatus said parameters being related to the engine
- F02N2200/023—Engine temperature
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
- F02N2200/00—Parameters used for control of starting apparatus
- F02N2200/06—Parameters used for control of starting apparatus said parameters being related to the power supply or driving circuits for the starter
- F02N2200/061—Battery state of charge [SOC]
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
- F02N2200/00—Parameters used for control of starting apparatus
- F02N2200/08—Parameters used for control of starting apparatus said parameters being related to the vehicle or its components
- F02N2200/0801—Vehicle speed
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
- F02N2200/00—Parameters used for control of starting apparatus
- F02N2200/08—Parameters used for control of starting apparatus said parameters being related to the vehicle or its components
- F02N2200/0802—Transmission state, e.g. gear ratio or neutral state
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
- F02N2200/00—Parameters used for control of starting apparatus
- F02N2200/10—Parameters used for control of starting apparatus said parameters being related to driver demands or status
- F02N2200/102—Brake pedal position
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
- F02N2300/00—Control related aspects of engine starting
- F02N2300/10—Control related aspects of engine starting characterised by the control output, i.e. means or parameters used as a control output or target
- F02N2300/102—Control of the starter motor speed; Control of the engine speed during cranking
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
- F02N2300/00—Control related aspects of engine starting
- F02N2300/10—Control related aspects of engine starting characterised by the control output, i.e. means or parameters used as a control output or target
- F02N2300/104—Control of the starter motor torque
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
- F02N2300/00—Control related aspects of engine starting
- F02N2300/20—Control related aspects of engine starting characterised by the control method
- F02N2300/2002—Control related aspects of engine starting characterised by the control method using different starting modes, methods, or actuators depending on circumstances, e.g. engine temperature or component wear
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/40—Engine management systems
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- 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
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02T10/7072—Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/72—Electric energy management in electromobility
Definitions
- the present invention relates to a starter for an internal combustion engine of a hybrid vehicle, a vehicle having the starter for the internal combustion engine, and a start method for the internal combustion engine.
- Patent Document 1 only discloses that the rotational speed overshoot is 200 to 500 rpm, and there is no specific description regarding the production of the start sound of the sporty internal combustion engine.
- the starting sound of the internal combustion engine depends on the rotational speed, and the state of the internal combustion engine at the time of starting the internal combustion engine is not constant. Therefore, unless an appropriate target rotational speed is set based on the state of the internal combustion engine, it becomes an annoying acoustic effect and gives the driver an unpleasant feeling. This is not described in Patent Document 1, and it is not easy to appropriately set the target rotational speed so as to prevent the driver from feeling uncomfortable based on the state of the internal combustion engine. .
- the present invention provides a starter for an internal combustion engine that can produce a sporty acoustic effect by appropriately setting a target rotational speed based on the state of the internal combustion engine when starting the internal combustion engine, and starting the internal combustion engine It is an object of the present invention to provide a vehicle having an apparatus and a method for starting an internal combustion engine.
- the present invention provides an internal combustion engine (for example, an internal combustion engine 4 described later), a cooling unit that cools the internal combustion engine with a refrigerant, and a temperature acquisition unit (for example, described later) that acquires the temperature of the refrigerant.
- An electric motor unit including an electric motor 5) and a control unit (for example, an ECU 6 described later) that controls the electric motor, and the control unit has a predetermined first rotational speed (for example, a first rotation described later).
- the motor is controlled to realize a second starting mode in which the internal combustion engine is started by increasing the rotational speed of the internal combustion engine to the second rotational speed (for example, a second rotational speed NE2 described later) by the electric motor. It is performed on the other hand.
- the second rotational speed is set as the target rotational speed in the second starting mode in which the internal combustion engine is started based on the temperature of the refrigerant constituting the state of the internal combustion engine.
- a higher second rotational speed can be easily realized in the second starting mode.
- the sound at the start of the internal combustion engine can be made sporty, and the acoustic effect can be enhanced.
- a low rotational speed difference of about 200 rpm to 500 rpm is set, or a high rotational speed difference is set. Will cause control failure.
- the rotational speed difference between the first rotational speed and the second rotational speed is set to a low value.
- a large rotational speed difference of up to 1,500 to 2,000 rpm can be realized without causing control failure.
- the driver can imagine the sporty driving of the vehicle to be driven before driving by the sound at the start of the internal combustion engine before driving, and can predict the pleasure of driving.
- control unit determines whether the first rotation number (e.g., first rotation number NE1 described later) and the second rotation number (e.g., second rotation number NE2 described later). It is preferable to perform control for setting the difference in the rotational speed to a value based on the temperature of the refrigerant with respect to the electric motor (for example, electric motor 5 described later).
- the control unit determines the rotation speed between the first rotation speed (for example, a first rotation speed NE1 described later) and the second rotation speed (for example, a second rotation speed NE2 described later) based on the temperature of the refrigerant. Set the difference as a result. Thereby, it can be easy to reliably set a large difference in the rotation speed between the first rotation speed and the second rotation speed.
- a low rotation speed difference of about 200 rpm to 500 rpm is set. Or set a high speed difference to cause control failure.
- the rotation speed difference is not set to a low value and control failure occurs.
- a large rotational speed difference of up to 1,500 to 2,000 rpm can be realized.
- the control unit e.g., ECU 6 described later
- has a second temperature e.g., a temperature of the refrigerant equal to or higher than a predetermined first temperature (e.g., predetermined temperature TW thr1 described below) and higher than the first temperature).
- a predetermined first temperature e.g., predetermined temperature TW thr1 described below
- TW thre2 predetermined temperature
- the second rotation speed in the second start mode is determined based on the refrigerant temperature. It is set to increase as the value increases. Thereby, since a higher second rotation speed can be easily realized in the second starting mode, the acoustic effect at the start of the internal combustion engine can be further enhanced.
- a low rotational speed difference of about 200 rpm to 500 rpm or a high rotational speed difference is set to cause a control failure. It becomes.
- the rotational speed difference between the first rotational speed and the second rotational speed is set based on the refrigerant temperature as described above so that the second rotational speed in the second starting mode increases as the refrigerant temperature increases. Without a low value and without causing control failure, a large rotational speed difference of 1,500 to 2,000 rpm can be realized.
- the control unit e.g., ECU 6 described later
- the second rotation speed e.g., described later
- the second rotational speed NE2 is preferably set to a constant value.
- the second rotational speed is set to a constant value.
- a constant high rotational speed can always be set as the second rotational speed in the second starting mode, and a uniform acoustic effect can be obtained when starting the internal combustion engine. Can produce. For this reason, every time the internal combustion engine is started, a sporty sensation can be given to the driver without any discomfort.
- the control unit e.g., ECU 6 described later
- the second rotational speed e.g., It is preferable to set a second rotational speed NE2, which will be described later, to be equal to or higher than a predetermined lower limit speed and equal to or lower than a predetermined upper limit speed.
- the second rotational speed is set to be equal to or higher than the predetermined lower limit rotational speed and equal to or lower than the predetermined upper limit rotational speed.
- control unit for example, ECU 6 described later
- the control unit prohibits the realization of the second start mode in a region where the temperature of the refrigerant is lower than the first temperature (for example, a predetermined temperature TW thre1 described later).
- the electric motor for example, electric motor 5 described later.
- the realization of the second start mode is prohibited. Thereby, it is possible to prohibit the internal combustion engine from starting at a high speed despite the low temperature state of the refrigerant, and to protect the internal combustion engine.
- control unit prohibits the realization of the second start mode in a region where the temperature of the refrigerant is lower than a first temperature (for example, a predetermined temperature TWthre1 described later) lower than a predetermined temperature. It is preferable to control the electric motor (for example, electric motor 5 described later).
- the realization of the second start mode is prohibited in the region where the temperature of the refrigerant is lower than the predetermined temperature lower than the first temperature.
- a battery for example, a battery 9 described later
- a limit rotation for calculating a limit rotational speed of the electric motor (for example, electric motor 5 described later) based on an output limit value of the electric power of the battery.
- the second rotation speed (for example, a second temperature described later) is determined based on the degree of increase of the limit rotational speed. It is preferable to control the electric motor so that the degree of increase in the rotational speed NE2) is reduced.
- the differential value of the target rotational speed determined from the output limit value of the electric power of the battery is larger than the differential value of the second rotational speed in the second starting mode.
- the second rotation speed in the second starting mode increases as the refrigerant temperature increases, rather than the target rotation speed increase rate determined from the output limit value of the electric power of the battery, which increases as the refrigerant temperature increases.
- the rate of increase is smaller.
- the internal combustion engine (for example, an internal combustion engine 4 described later) supplies driving force to wheels (for example, a later-described wheel Wr) of a vehicle (for example, a vehicle 3 described later) to change the driving characteristics of the vehicle.
- a selection unit for example, a starting mode changeover switch 112 described later
- the control unit for example, ECU 6 described later
- a second rotation speed for example, a second rotation speed NE2 described later
- the second rotational speed in the second starting mode is set based on the selection unit that changes the driving characteristics of the vehicle.
- the selection unit that changes the driving characteristics of the vehicle.
- control unit e.g., ECU 6 described later
- the control unit is configured to set the second rotation number (e.g., second rotation number NE2 described later) and the first rotation number (e.g., described later) set based on the temperature of the refrigerant.
- the difference in the first rotation speed NE1) is equal to or smaller than a predetermined value, it is preferable to perform control for prohibiting the realization of the second starting mode on the electric motor (for example, electric motor 5 described later).
- the realization of the second start mode is prohibited.
- the sound effect of the starting sound of the internal combustion engine which is not so sporty and does not satisfy the driver of the vehicle. Therefore, it is possible to avoid damaging the vehicle owner's satisfaction with respect to the vehicle, that is, damaging the vehicle owner's pride by owning a sporty luxury vehicle.
- a vehicle according to the present invention (for example, a vehicle 3 described later) has the above-described internal combustion engine starter.
- the sound at the start of the internal combustion engine of the vehicle can be made sporty, and the acoustic effect can be enhanced.
- the second rotational speed is set without considering the temperature of the refrigerant, as described in Patent Document 1, a low rotational speed difference of about 200 rpm to 500 rpm is set, or a high rotational speed difference is set. Will cause control failure.
- the rotational speed difference between the first rotational speed and the second rotational speed is set to a low value.
- a large rotational speed difference of up to 1,500 to 2,000 rpm can be realized without causing control failure.
- the driver can imagine the sporty driving of the vehicle to be driven before driving by the sound at the start of the internal combustion engine before driving, and can predict the pleasure of driving.
- the internal combustion engine start method sets the rotational speed of the internal combustion engine (for example, an internal combustion engine 4 to be described later) up to a predetermined first rotational speed (for example, a first rotational speed NE1 to be described later).
- a predetermined first rotational speed for example, a first rotational speed NE1 to be described later.
- a first start mode in which the internal combustion engine is started by being increased by an electric motor 5 described later, and a second rotation speed (for example, a later described first rotation speed) set higher than the first rotation speed and set based on the temperature of the refrigerant.
- a second starting mode in which the internal combustion engine is started by increasing the rotational speed of the internal combustion engine by the electric motor up to 2 rotational speeds NE2).
- the second rotational speed in the second starting mode for starting the internal combustion engine is set based on the temperature of the refrigerant.
- a higher second rotational speed can be easily realized in the second starting mode.
- the sound at the start of the internal combustion engine can be made sporty, and the acoustic effect can be enhanced.
- a low rotational speed difference of about 200 rpm to 500 rpm is set, or a high rotational speed difference is set. Will cause control failure.
- the rotational speed difference between the first rotational speed and the second rotational speed is set to a low value.
- a large rotational speed difference of up to 1,500 to 2,000 rpm can be realized without causing control failure.
- the driver can imagine the sporty driving of the vehicle to be driven before driving by the sound at the start of the internal combustion engine before driving, and can predict the pleasure of driving.
- the present invention at the time of starting the internal combustion engine, by appropriately setting the target rotational speed based on the state of the internal combustion engine, it is possible to produce a sporty sound effect, and the internal combustion engine And a starting method for an internal combustion engine can be provided.
- vehicle 3 carrying a starting device of an internal-combustion engine concerning an embodiment of the present invention. It is a figure which shows the ignition switch 110 and the starting mode changeover switch 112 of the starting device of the internal combustion engine which concerns on embodiment of this invention. It is a functional block diagram which shows the structure of ECU6 which concerns on embodiment of this invention. It is a figure which shows the relationship between the target rotation speed of the internal combustion engine 4 at the time of the start of the internal combustion engine 4 in the starter of the internal combustion engine which concerns on embodiment of this invention, and water temperature.
- the target rotational speed of the internal combustion engine 4 and the rotational torque of the motor when the internal combustion engine 4 is started It is a figure which shows the relationship with elapsed time. It is a figure which shows switching of the starting mode in the starting device of the internal combustion engine which concerns on embodiment of this invention. It is a flowchart which shows the S / S start determination process in the starter of the internal combustion engine which concerns on embodiment of this invention. It is a flowchart which shows the S / S start determination process at the time of vehicle starting in the starting device of the internal combustion engine which concerns on embodiment of this invention.
- FIG. 1 is a diagram showing a vehicle 3 equipped with an internal combustion engine starter according to an embodiment of the present invention.
- FIG. 2 is a diagram showing an ignition switch 110 and a starting mode changeover switch 112 of the starting device for the internal combustion engine according to the embodiment of the present invention.
- the vehicle 3 having the internal combustion engine starter according to the present embodiment is a hybrid vehicle.
- the vehicle 3 includes an electronic control unit (hereinafter referred to as “ECU 6”) as a control device that constitutes a first drive device 1, a second drive device 2, and a control unit that controls these drive devices. 6), a PDU (power drive unit) 8, and a battery 9.
- ECU 6 electronice control unit
- PDU power drive unit
- the 1st drive device 1 is provided in the rear part of vehicles 3, and drives rear wheels Wr and Wr as the 1st drive wheel.
- the first drive device 1 includes an internal combustion engine (ENG) 4, an electric motor 5, and a transmission 7.
- the internal combustion engine 4 and the electric motor 5 are connected in series, and torques of the internal combustion engine 4 and the electric motor 5 are transmitted to the rear wheels Wr and Wr via the transmission 7.
- the internal combustion engine 4 is a V-type 6-cylinder engine, for example, and generates torque for running the hybrid vehicle 3 by burning fuel.
- the crankshaft of the internal combustion engine 4 is connected, that is, directly connected to the output shaft of the electric motor 5 without a clutch.
- the internal combustion engine 4 has a crank angle sensor 91 (see FIG. 3) as a rotation speed acquisition unit.
- the crank angle sensor 91 acquires the rotational speed of the internal combustion engine 4. Specifically, the crank angle sensor 91 outputs a pulse signal to the ECU 6 at every predetermined crank angle according to the rotation of a crankshaft (not shown) of the internal combustion engine 4. In the ECU 6, the actual rotational speed of the internal combustion engine 4 is grasped based on the output of the crank angle sensor 91.
- the internal combustion engine 4 has a water temperature sensor 92 as a temperature acquisition unit. The water temperature sensor 92 acquires the temperature of the refrigerant.
- the water temperature sensor 92 generates a detection signal that is substantially proportional to the temperature of cooling water (hereinafter referred to as “water temperature”) as a refrigerant flowing in a cooling water passage (not shown) formed in the cylinder block of the internal combustion engine 4. It outputs to ECU6.
- the internal combustion engine 4, the crank angle sensor 91 as a rotation speed acquisition unit, the water temperature sensor 92 as a temperature acquisition unit, and the ECU 6 constitute an internal combustion engine unit.
- the internal combustion engine 4 supplies driving force to the wheels (rear wheels Wr, Wr) of the vehicle 3.
- a cooling water passage (not shown) formed in the cylinder block of the internal combustion engine 4 communicates with the radiator, and these constitute a cooling unit that cools the internal combustion engine 4 with the refrigerant.
- the electric motor 5 starts the internal combustion engine 4.
- the electric motor 5 is, for example, a three-phase AC motor, and generates torque for causing the vehicle 3 to travel by using electric power stored in a battery 9 as a battery. That is, the battery 9 outputs electric power to the electric motor 5 and outputs electric power to the ECU 6 and the PDU 8.
- the electric motor 5 is connected to the battery 9 via a PDU 8 including an inverter, and assists the driving force of the internal combustion engine 4. Further, when the internal combustion engine 4 is started, the electric motor 5 is used as a starter.
- the electric motor 5 is controlled by a control signal from the ECU 6 and a sporty sound start (hereinafter referred to as “S / S start”) described later or a normal internal combustion engine 4 (hereinafter referred to as “normal start”) is executed.
- S / S start sporty sound start
- normal start normal internal combustion engine 4
- the ECU 6 constitutes a capacity acquisition unit 61 that acquires the usable capacity of the battery 9.
- the ECU 6 determines whether to perform EV traveling in which the vehicle 3 is traveled only by the electric motor 5 or to travel the vehicle 3 by the internal combustion engine 4 based on the acquired usable capacity of the battery 9.
- the ECU 6 constitutes a determination unit 62 that determines whether the vehicle 3 is currently traveling by EV or by the internal combustion engine 4.
- the ECU 6 constitutes a traveling state acquisition unit 63 that acquires a traveling state of the vehicle 3, that is, an EV stop state, an EV sailing state, an EV deceleration state, and the like during EV traveling.
- the ECU 6 constitutes a shift state acquisition unit 64 that acquires information about whether the transmission 7 is selected from among shift states such as parking, neutral, and drive. Further, the ECU 6 constitutes a limit rotation speed calculation unit 65 that calculates the limit rotation speed BL of the electric motor 5 based on the output limit value of the electric power of the battery 9 obtained from the usable capacity of the battery 9. Configure the unit. Further, the ECU 6 receives the actual speed and acceleration of the vehicle 3 acquired and detected by the vehicle speed sensor unit 93 and output to the ECU 6.
- a transmission 7 serving as a transmission changes speed by converting an input from at least one of torque generated by the internal combustion engine 4 and torque generated by the electric motor 5 into a rotational speed and torque at a desired gear ratio. And transmitted to the rear wheels Wr and Wr.
- the second drive device 2 is provided at the front portion of the vehicle 3 and drives front wheels Wf (RWf, LWf) as second drive wheels.
- the second drive device 2 includes electric motors 2A and 2B. The torques of these electric motors 2A and 2B are transmitted to the front wheels Wf (RWf and LWf).
- the electric motors 2 ⁇ / b> A and 2 ⁇ / b> B are, for example, three-phase AC motors, similarly to the electric motor 5, and generate torque for causing the vehicle 3 to travel using electric power stored in the battery 9.
- the electric motors 2A and 2B are connected to the battery 9 via the PDU 8 including an inverter. When a control signal from the ECU 6 is input to the PDU 8, power supply from the battery 9 and energy to the battery 9 are obtained. Regeneration is controlled.
- a friction brake (not shown) is provided on each of the four rear wheels Wr, Wr and the front wheels Wf (RWf, LWf).
- This friction brake is composed of, for example, a hydraulic disc brake.
- the depressing amount that is, the depressing force corresponding to the operation amount is amplified and transmitted to the brake pad via the hydraulic cylinder or the like, and the brake disc and the brake pad attached to each drive wheel A friction force is generated between the two wheels to brake each drive wheel.
- the internal combustion engine 4 is started by an ignition switch 110 having a button switch 111 as shown in FIG.
- the ignition switch 110 constitutes an activation unit that requests activation of the internal combustion engine 4.
- switching between “S / S start” and “normal start” is performed so as to surround the button switch 111 for starting the internal combustion engine 4.
- This is done by operating the starting mode changeover switch 112 as a selection unit for changing the driving characteristics.
- the starting mode changeover switch 112 is configured to be rotatable coaxially with the button switch 111 around the circular button switch 111.
- the switching position of the first mode 121, the second mode 122, the third mode 123, and the force mode 124 is displayed on the annular display unit 113 arranged so as to surround the outer periphery of the start mode changeover switch 112.
- the mode is selected by rotating the start mode change switch 112 around the button switch 111 so that the instruction line 125 displayed on the start mode change switch 112 matches the switching position of these modes. It is configured as follows.
- the start mode changeover switch 112 is only in an operation mode in which the driving characteristics of the vehicle 3 are one step superior to the currently selected operation mode, and in an operation mode in which the driving characteristics of the vehicle 3 are one step inferior to the selected operation mode. Allow change of operation mode. For example, the operation mode cannot be changed at a stretch from the first mode 121 to the third mode 123.
- the first mode is a mode that assumes quiet driving in urban areas.
- the second mode in which the driving characteristics of the vehicle 3 are superior to the first mode, is a mode that assumes a sporty travel with good balance.
- the third mode in which the driving characteristics of the vehicle 3 are further superior to the second mode is a mode that assumes a sporty real supersport running that is more sporty than the second mode.
- the force mode in which the driving characteristics of the vehicle 3 are further superior to the third mode is a mode assuming a race or a time attack on a circuit or the like.
- the normal start is a start mode in which a normal and quiet internal combustion engine 4 is started when starting.
- the S / S start (second start mode) is a start mode in which a sporty sound is generated when the internal combustion engine 4 is started, that is, a start mode in which the engine is started with a higher rotational speed than the normal start.
- the internal combustion engine 4 is always started by the normal start.
- the second mode, the third mode, and the force mode described above since the sporty traveling is assumed, the internal combustion engine 4 is started by S / S start or normal start, respectively. In this way, whether or not the S / S start is possible is determined in consideration of the characteristics of each operation mode.
- FIG. 3 is a functional block diagram showing a configuration of the ECU 6 according to the embodiment of the present invention. As shown in FIG.
- the ECU 6 includes a capacity acquisition unit 61, a determination unit 62, a shift state acquisition unit 64, and a limit rotation speed calculation unit 65 as modules for executing control for switching the starting mode of the internal combustion engine 4. .
- a capacity acquisition unit 61 a determination unit 62, a shift state acquisition unit 64, and a limit rotation speed calculation unit 65 as modules for executing control for switching the starting mode of the internal combustion engine 4. .
- the capacity acquisition unit 61 acquires the usable capacity of the battery 9. That is, the capacity acquisition unit 61 calculates the SOC (State Of Charge) in which the rated capacity of the battery 9 is 1 and the current remaining amount (kW) is expressed as a percentage based on the outputs of the battery current sensor 94 and the battery voltage sensor 95. calculate. Based on the SOC calculated by the capacity acquisition unit 61, the ECU 6 determines whether to perform EV travel or start the internal combustion engine 4.
- SOC State Of Charge
- the determination unit 62 determines whether the vehicle 3 is currently traveling by EV or is traveling by the internal combustion engine 4 based on the rotation speed of the internal combustion engine 4 from the crank angle sensor 91. That is, when the rotational speed of the internal combustion engine 4 from the crank angle sensor 91 is 0 (rpm / min), the determination unit 62 determines that the vehicle 3 is currently performing EV traveling. The determination unit 62 determines that the vehicle 3 is currently traveling by the internal combustion engine 4 when the rotational speed of the internal combustion engine 4 from the crank angle sensor 91 is a predetermined value other than 0 (rpm / min). .
- the shift state acquisition unit 64 is an electric gear selector having a plurality of buttons arranged on the center console.
- the electric gear selector switches between parking, neutral, drive, reverse, etc. by button operation.
- parking, neutral, drive The information output from the electric gear selector is acquired as to which one of the shift states of reverse and reverse is selected.
- Limit rotation speed calculation unit 65 calculates and outputs limit rotation speed BL (see FIG. 4) of electric motor 5 based on the output limit value of power of battery 9 based on the SOC calculated and output by capacity acquisition unit 61.
- FIG. 4 is a diagram showing the relationship between the target rotational speed of the internal combustion engine 4 and the water temperature when the internal combustion engine 4 is started in the internal combustion engine starter according to the embodiment of the present invention.
- FIG. 5 shows the target engine speed of the internal combustion engine 4 and the motor at the start of the internal combustion engine 4 when the temperature of the cooling water exceeds the predetermined temperature TW thre3 in the starter for the internal combustion engine according to the embodiment of the present invention. It is a figure which shows the relationship between rotational torque and elapsed time.
- the ECU 6 increases the rotational speed of the internal combustion engine 4 by the electric motor 5 to a predetermined first rotational speed NE1 that is a target rotational speed at the time of normal startup.
- the starting control is performed on the electric motor 5 and realized.
- the first rotational speed NE1 is set in advance based on the water temperature acquired by the water temperature sensor 92, and is stored in a storage device (not shown) of the ECU 6.
- the first rotation speed NE1 is a normal first normal rotation speed ES1 that is a constant value when the water temperature is lower than a predetermined temperature TW thre0 between TW thre1 and TW thre2 .
- the first rotation speed NE1 is such that the rotation speed decreases at a constant decrease rate with respect to the increase in the temperature of the cooling water (the slope is a negative value) (Like drawing a straight line graph)
- the first rotation speed NE1 is a normal second normal rotation speed ES2 that is a constant value when the water temperature exceeds a predetermined temperature TW thre3 .
- the ECU 6 starts the internal combustion engine 4 after starting the internal combustion engine 4 by increasing the rotational speed of the internal combustion engine 4 to the first rotational speed NE1 based on the first control law. Is realized by performing a control on the electric motor 5 so that the rotational speed of the motor is converged to an idle rotational speed IN equal to or smaller than 1 rotational speed based on the first control law.
- the ECU 6 performs feedback control based on the difference between the target rotation speed of the internal combustion engine 4 and the current rotation speed of the internal combustion engine 4 in the first control law.
- the electric motor 5 is controlled so as to gradually converge the rotational speed of the internal combustion engine 4 to the idle rotational speed IN.
- the graph of FIG. 5 shows the relationship between the target rotational speed of the internal combustion engine 4 and the rotational torque of the motor, and the elapsed time when the water temperature exceeds a predetermined temperature TW thre3.
- the rotational speed IN coincides, and the rotational speed gradually approaches the idle rotational speed IN from the start of the internal combustion engine 4 and converges.
- the idle speed IN with respect to the water temperature is as shown in FIG.
- the ECU 6 rotates the internal combustion engine 4 to a second speed NE2 that is set higher than the first speed NE1 and set based on the water temperature. Control for starting the internal combustion engine 4 by increasing the number by the electric motor 5 is performed on the electric motor 5 and realized. Specifically, the second rotation speed NE2 is set in advance based on the water temperature acquired by the water temperature sensor 92, and is stored in a storage device (not shown) of the ECU 6.
- the second rotation speed NE2 is set to a value higher by about 1500 rpm / min to 2000 rpm / min than the first rotation speed NE1 in the main cooling water temperature region (for example, a region exceeding the temperature TW thre3 ).
- the second rotation speed NE2 is a normal first normal rotation speed ES1 that is a constant value when the water temperature is lower than TW thre1 . That is, when the water temperature is lower than TW thre1 , the second rotational speed NE2 is the same value as the first rotational speed NE1, and the ECU 6 controls the electric motor 5 to substantially prohibit the realization of the second starting mode. Do it.
- the second rotational speed NE2 is such that when the water temperature is not lower than a predetermined temperature TW thr1 (first temperature) and not higher than TW thr2 (second temperature), the rotational speed increases at a constant increase rate with respect to the increase in water temperature. (Like drawing a linear graph with a positive slope). That, ECU 6, the temperature of the cooling water TW thre1 (first temperature) or more, and higher TW than the first temperature thre2 (Second temperature) following areas, by increasing the second rotational speed NE2 based on the water temperature Set. Further, as shown in FIG.
- the second rotational speed NE2 is a third rotational speed ES3 that is a constant value of the S / S start when the water temperature exceeds TW thre2 . That is, the ECU 6 sets the second rotational speed NE2 to a constant value in a region where the water temperature exceeds TW thre2 (second temperature). As described above, the difference in the rotation speed between the first rotation speed NE1 and the second rotation speed NE2 is set to a value based on the temperature of the cooling water, and the ECU 6 sets the first rotation speed NE1 and the second rotation speed NE2. The motor 5 is controlled to set the difference in rotational speed to a value based on the water temperature.
- the ECU 6 increases the rotation speed of the internal combustion engine 4 to the second rotation speed NE2 higher than the first rotation speed NE1 by the electric motor 5 and starts the internal combustion engine 4, and then determines the rotation speed of the internal combustion engine 4 as the first control law. This is realized by controlling the electric motor 5 so as to converge to the idle speed IN equal to or lower than the second speed NE2 based on a different second control law.
- the ECU 6 increases the rotational speed of the internal combustion engine 4 to the second rotational speed NE2 by the electric motor 5 by feedback control based on the difference between the target rotational speed of the internal combustion engine 4 and the current rotational speed of the internal combustion engine 4.
- feedback control based on the difference between the target rotational speed of the internal combustion engine 4 and the current rotational speed of the internal combustion engine 4 as in the first control law is not performed.
- the ECU 6 replaces the feedback control with the speed at which the current value of the rotational speed of the internal combustion engine 4 in the second control law converges to the target value of the rotational speed of the internal combustion engine 4 in the first control law.
- the electric motor 5 is controlled so that the current value of the rotational speed is smaller than the speed at which the current value of the internal combustion engine 4 converges to the target value of the rotational speed. That is, in the second control law, as shown in the graph for the rotational speed in FIG. 5, the ECU 6 allows the rotational speed of the internal combustion engine 4 to converge to the idle rotational speed IN more slowly than the first control law. Then, the electric motor 5 is controlled so as to gradually decrease and gradually decrease based on a predetermined gradual decrease rate and converge to the idle rotational speed IN. As shown in the rotation speed graph of FIG. 5, the predetermined gradual decrease rate increases stepwise as time passes, and the reduction amount of the rotation speed of the internal combustion engine 4 decreases stepwise as time passes. It is preferable to do.
- the ECU 6 performs the maximum torque T MAX of the motor 5 in the normal start (first start mode) and the S / S start (second start mode).
- the electric motor 5 is controlled so as to be substantially the same as the maximum torque value T MAX of the electric motor 5.
- the ECU 6 increases the torque rising speed of the electric motor 5 in the normal start (first start mode) and the S / S start (second The electric motor 5 is controlled so that the torque rising speed of the electric motor 5 in the starting mode is substantially the same.
- ECU 6 is a time for the torque of the motor 5 takes the maximum value T MAX in the S / S start (second start mode), the torque of the motor 5 takes the maximum value T MAX in the normal start (the first start-up mode) Control that is longer than the time is performed on the electric motor 5.
- the ECU 6 keeps the motor torque until the motor torque becomes zero so that the motor torque decreases at a predetermined decrease rate with the passage of time (such as drawing a linear graph with a negative slope). Continue to decrease the torque slowly.
- FIG. 6 is a diagram showing switching of the starting mode in the starting device for the internal combustion engine according to the embodiment of the present invention.
- the vehicle 3 is activated by pressing (IG) a button switch 111 of the ignition switch 110 (see FIG. 2).
- IG a button switch 111 of the ignition switch 110
- the internal combustion engine 4 is started or transitioned to the EV travel mode is performed in each mode already selected by the start mode changeover switch 112.
- the ECU 6 prohibits the S / S start (second start mode) and starts the normal start. Control for realizing the (first start mode) is performed on the electric motor 5. That is, when the temperature of the cooling water is equal to or lower than a predetermined temperature TW thre5 higher than the first temperature TW thre1 , the ECU 6 controls the electric motor 5 to perform normal start (first start mode) (Fi1). against. When the temperature of the cooling water exceeds the first predetermined temperature TW thre5 , the ECU 6 controls the electric motor 5 to shift to the EV traveling mode (Fi5) without starting the electric motor 5.
- the ECU 6 determines that the accelerator pedal depression amount, the SOC state, and the temperature of the cooling water satisfy predetermined conditions when the internal combustion engine 4 is in a starting state, the ECU 6 Control for stopping the internal combustion engine 4 is performed on the internal combustion engine 4, and control for shifting to the EV travel mode (Fi5) is performed on the electric motor 5, whereby the vehicle 3 performs EV travel.
- the ECU 6 determines that the accelerator pedal depression amount, the SOC state, and the cooling water temperature do not satisfy the predetermined conditions after the transition to the EV traveling mode, the ECU 6 According to the first start mode), the control for starting the internal combustion engine 4 is performed on the electric motor 5 (Fi4), and the vehicle 3 travels by the internal combustion engine 4.
- the ECU 6 When the button mode 111 of the ignition switch 110 is pressed while the second mode is selected by the start mode switch 112, the ECU 6 performs a normal start (first start mode) based on the coolant temperature. Alternatively, control for selectively realizing the S / S start (second start mode) is performed on the electric motor 5. That is, when the temperature of the cooling water is lower than the first temperature TW thre1 , the ECU 6 performs control for realizing the normal start (first start mode) on the electric motor 5 (Se1). When the temperature of the cooling water is equal to or higher than the first temperature TW thre1 , the ECU 6 controls the electric motor 5 to realize S / S start (second start mode) (Se2). That is, the ECU 6 sets the second rotational speed NE2 based on the driving characteristics (driving mode) of the vehicle 3.
- the ECU 6 determines that the accelerator pedal depression amount, the SOC state, and the temperature of the cooling water satisfy predetermined conditions when the internal combustion engine 4 is in a starting state, the ECU 6 Control for stopping the internal combustion engine 4 is performed on the internal combustion engine 4 and control for shifting to the EV travel mode is performed on the electric motor 5 (Se5), whereby the vehicle 3 performs EV travel.
- the ECU 6 determines that the accelerator pedal depression amount, the SOC state, and the cooling water temperature do not satisfy the predetermined conditions after the transition to the EV traveling mode, the ECU 6 In accordance with the first start mode, the motor 5 is controlled to start the internal combustion engine 4 (Se4), and the vehicle 3 travels by the internal combustion engine 4.
- the ignition switch 110 When the button mode 111 of the ignition switch 110 is pressed while the third mode is selected by the start mode switching switch 112, that is, after the third mode is selected by the start mode switch 112, the ignition switch 110 is switched.
- the vehicle switch 3 When the vehicle switch 3 is activated by pressing the button switch 111, the ECU 6 performs a normal start (first start mode) based on the temperature of the cooling water, as in the case where the second mode is selected, or Control for selectively realizing the S / S start (second start mode) is performed on the electric motor 5. That is, when the temperature of the cooling water is lower than the first temperature TW thre1 , the ECU 6 performs control for realizing a normal start (first start mode) on the electric motor 5 (Th1).
- the ECU 6 controls the electric motor 5 to realize S / S start (second start mode) (Th2).
- S / S start second start mode
- the ECU 6 does not perform control for shifting to the EV traveling mode on the electric motor 5 unlike the first mode and the second mode.
- the ignition switch 110 When the button mode 111 of the ignition switch 110 is pressed while the force mode is selected by the start mode switching switch 112, that is, after the force mode is selected by the start mode switch 112, the ignition switch 110 is switched.
- the vehicle switch 3 When the vehicle switch 3 is activated by pressing the button switch 111, the ECU 6 performs a normal start (first start mode) based on the temperature of the cooling water, as in the case where the second mode is selected, or Control for selectively realizing the S / S start (second start mode) is performed on the electric motor 5. That is, when the temperature of the cooling water is lower than the first temperature TW thre1 , the ECU 6 performs control for realizing the normal start (first start mode) on the motor 5 (Fr1).
- the ECU 6 controls the electric motor 5 to realize S / S start (second start mode) (Fr2).
- the ECU 6 does not perform control for shifting to the EV traveling mode on the electric motor 5 as in the third mode.
- the control of the ECU 6 in the case where the operation mode is switched by the start mode switching switch 112 when the internal combustion engine 4 is started or when the mode is shifted to the EV travel mode is as follows. .
- the start mode switch 112 has been switched from the first mode to the second mode, or has been switched from the second mode to the first mode.
- the state in which the internal combustion engine 4 is started (Fi3, Se3) or the EV traveling mode state (Fi5, Se5) is continued.
- the ECU 6 determines that the accelerator pedal depression amount, the SOC state, and the cooling water temperature satisfy predetermined conditions, the ECU 6 Then, control for stopping the internal combustion engine 4 is performed on the internal combustion engine 4 and control for shifting to the EV travel mode is performed on the electric motor 5 (Fi5, Se5), whereby the vehicle 3 performs EV travel. Further, when the ECU 6 determines that the accelerator pedal depression amount, the SOC state, and the cooling water temperature do not satisfy the predetermined conditions when the vehicle is in the EV traveling mode, The ECU 6 controls the electric motor 5 to start the internal combustion engine 4 in a normal start (first start mode) (Fi3, Se3), and the vehicle 3 travels by the internal combustion engine 4.
- a normal start first start mode
- start mode change switch 112 is switched from the third mode to the force mode or the force mode is switched to the third mode when the internal combustion engine 4 is started, the internal combustion engine 4 continues to start.
- the state that is being continued is continued (Fr3, Th3), and the ECU 6 does not perform control for shifting to the EV travel mode on the electric motor 5.
- the state in which the internal combustion engine 4 is started continues (Se3). Thereafter, when the ECU 6 determines that the accelerator pedal depression amount, the SOC state, and the temperature of the cooling water satisfy predetermined conditions, the ECU 6 performs control for stopping the internal combustion engine 4. And the control for shifting to the EV traveling mode is performed on the electric motor 5 (Se5), whereby the vehicle 3 performs the EV traveling.
- the ECU 6 determines that the accelerator pedal depression amount, the SOC state, and the cooling water temperature do not satisfy the predetermined conditions after the transition to the EV traveling mode, the ECU 6 In accordance with the first start mode, the motor 5 is controlled to start the internal combustion engine 4 (Se4), and the vehicle 3 travels by the internal combustion engine 4.
- the ECU 6 basically prohibits the motor 5 from starting the internal combustion engine 4 by the S / S start (second start mode) and controls the motor 5 to start the internal combustion engine 4 by the normal start (first start mode). (Th1).
- the ECU 6 when the internal combustion engine 4 is started when the start mode changeover switch 112 is switched from the second mode to the third mode when shifting to the EV traveling mode in the second mode, the ECU 6 is in principle.
- the motor 5 In the normal start (first start mode), the motor 5 is controlled to start the internal combustion engine 4, but when starting the internal combustion engine 4 during a specific EV travel in the EV travel mode, Control for starting the internal combustion engine 4 is performed on the electric motor 5 by the S / S start (second start mode).
- the ECU 6 The control for starting the internal combustion engine 4 is performed on the electric motor 5 by the normal start (first start mode), but when starting the internal combustion engine 4 during a specific EV travel in the EV travel mode, S Control for starting the internal combustion engine 4 is performed on the electric motor 5 by the / S start (second start mode).
- “at the time of specific EV traveling” means that the vehicle 3 is traveling in the “EV sailing state” or the vehicle 3 is in the “EV stopped state” that is stopped in the EV traveling mode. This means that the vehicle 3 is traveling in the “EV low speed state”.
- the ECU 6 Control for starting the internal combustion engine 4 is performed on the electric motor 5 by the S / S start (second start mode).
- FIG. 7 is a flowchart showing an S / S start determination process in the internal combustion engine starter according to the embodiment of the present invention.
- FIG. 8 is a flowchart showing the S / S start determination process at the time of starting the vehicle in the internal combustion engine starter according to the embodiment of the present invention.
- FIG. 9 is a flowchart showing a start determination process during EV sailing in the starter for the internal combustion engine according to the embodiment of the present invention.
- FIG. 10 is a flowchart showing an S / S start determination process at the time of EV stop in the internal combustion engine starter according to the embodiment of the present invention.
- FIG. 11 is a flowchart showing the S / S start determination process in the EV low speed state in the internal combustion engine starter according to the embodiment of the present invention.
- step S1 the ECU 6 determines whether or not the vehicle 3 is in a state before the button 3 is started before the button switch 111 of the ignition switch 110 is pressed. If this determination is YES, the process by the ECU 6 proceeds to the activated state S / S start determination process (see FIG. 8). If this determination is NO, the process by the ECU 6 proceeds to step S2.
- step S2 the ECU 6 determines whether or not the vehicle 3 is in the EV traveling mode based on the rotational speed of the internal combustion engine 4 acquired by the crank angle sensor 91 as the rotational speed acquisition unit. If this determination is YES, the process by the ECU 6 proceeds to step S3. If this determination is NO, the process by the ECU 6 returns to step S1.
- step S3 the ECU 6 determines whether or not the transmission 7 is in the neutral state based on the information output from the electric gear selector. If this determination is YES, the process by the ECU 6 proceeds to the EV sailing state S / S start determination process (see FIG. 9). If this determination is NO, the process by the ECU 6 proceeds to step S4.
- step S4 the ECU 6 determines whether or not the vehicle speed of the vehicle 3 is 0 (km / h) based on the vehicle speed information of the vehicle 3 acquired by the vehicle speed sensor unit 93. If this determination is YES, the process by the ECU 6 proceeds to step S5. If this determination is NO (when the vehicle speed of the vehicle 3 is greater than 0 (km / h)), the processing by the ECU 6 proceeds to step S6.
- step S5 the ECU 6 determines whether or not the brake pedal is being operated based on the depression amount of the brake pedal. If this determination is YES, the process by the ECU 6 proceeds to the EV stop state S / S start determination process (see FIG. 10). If this determination is NO, the process by the ECU 6 returns to step S1.
- step S6 the ECU 6 determines whether or not the vehicle speed of the vehicle 3 is equal to or less than a predetermined threshold (speed threshold) based on the vehicle speed information of the vehicle 3 acquired by the vehicle speed sensor unit 93. If this determination is YES, the process by the ECU 6 proceeds to the EV low speed state S / S start determination process (see FIG. 11). If this determination is NO, the process by the ECU 6 returns to step S1.
- a predetermined threshold speed threshold
- step S11 the ECU 6 determines that the vehicle 3 before the button switch 111 of the ignition switch 110 is pressed based on the operation mode acquired from the ignition switch 110. In the state before starting, it is determined whether the third mode or the force mode 124 is selected as the operation mode. If this determination is YES, the process by the ECU 6 proceeds to step S12. If this determination is NO, the process by the ECU 6 proceeds to step S17.
- step S12 the ECU 6 determines whether or not the button switch 111 of the ignition switch 110 has been pressed. If this determination is YES, the process by the ECU 6 proceeds to step S13. If this determination is NO, the process by the ECU 6 returns to step S11.
- step S13 the ECU 6 determines whether or not the temperature of the cooling water is equal to or higher than the first temperature TW thre1 , which is a threshold, based on the temperature of the cooling water as the refrigerant acquired from the water temperature sensor 92 as the temperature acquisition unit. Do. If this determination is YES, the process by the ECU 6 proceeds to step S14. If this determination is NO, the process by the ECU 6 proceeds to step S16.
- TW thre1 which is a threshold
- step S14 the ECU 6 determines whether or not the SOC calculated by the capacity acquisition unit 61 is equal to or greater than a predetermined threshold value. If this determination is YES, the process by the ECU 6 proceeds to step S15. If this determination is NO, the process by the ECU 6 proceeds to step S16.
- step S15 the ECU 6 controls the electric motor 5 so as to realize the S / S start (second start mode). Thereby, the internal combustion engine 4 is started by the above-described S / S start (second start mode). And this process by control of ECU6 is complete
- step S16 the ECU 6 controls the electric motor 5 so as to realize a normal start (first start mode). Thereby, the internal combustion engine 4 is started by the above-described normal start (first start mode). And this process by control of ECU6 is complete
- step S17 the ECU 6 determines whether or not the button switch 111 of the ignition switch 110 has been pressed. If this determination is YES, the process by the ECU 6 proceeds to step S18. If this determination is NO, the process by the ECU 6 returns to step S11.
- step S18 the ECU 6 determines whether or not the second mode is selected by the start mode switching switch 112 based on the operation mode acquired from the ignition switch 110. If this determination is YES, the process by the ECU 6 proceeds to step S19. If this determination is NO, the process by the ECU 6 proceeds to step S22.
- step S19 the ECU 6 determines whether or not the temperature of the cooling water is equal to or higher than a first temperature TW thre1 , which is a predetermined threshold, based on the temperature of the cooling water as the refrigerant acquired from the water temperature sensor 92 as the temperature acquisition unit. Make a decision. If this determination is YES, the process by the ECU 6 proceeds to step S20. If this determination is NO, the process by the ECU 6 proceeds to step S22.
- a first temperature TW thre1 which is a predetermined threshold
- step S20 the ECU 6 determines whether or not the SOC calculated by the capacity acquisition unit 61 is equal to or greater than a predetermined threshold value. If this determination is YES, the process by the ECU 6 proceeds to step S21. If this determination is NO, the process by the ECU 6 proceeds to step S22.
- step S21 the ECU 6 controls the electric motor 5 so as to realize the S / S start (second start mode). Thereby, the internal combustion engine 4 is started by the above-described S / S start (second start mode). And this process by control of ECU6 is complete
- step S22 the ECU 6 controls the electric motor 5 so as to realize a normal start (first start mode). Thereby, the internal combustion engine 4 is started by the above-described normal start (first start mode). And this process by control of ECU6 is complete
- step S31 the ECU 6 determines that the deceleration of the vehicle 3 is predetermined based on the actual acceleration of the vehicle 3 acquired by the vehicle speed sensor unit 93. It is determined whether or not the threshold value (deceleration threshold value) is equal to or less than the threshold value. If this determination is YES, the process by the ECU 6 proceeds to step S32. If this determination is NO, the process by the ECU 6 returns to step S31.
- the threshold value deceleration threshold value
- step S32 the ECU 6 determines, based on the operation mode acquired from the ignition switch 110, whether the operation mode has been switched from the first mode to the second mode or from the second mode to the third mode by the start mode switching switch 112. I do. If this determination is YES, the process by the ECU 6 proceeds to step S33. If this determination is NO, the process by the ECU 6 returns to step S31.
- step S33 the ECU 6 controls the electric motor 5 so as to realize the S / S start (second start mode). Thereby, the internal combustion engine 4 is started by the above-described S / S start (second start mode). And this process by control of ECU6 is complete
- step S41 the ECU 6 switches from the first mode to the second mode by the start mode change switch 112 based on the operation mode acquired from the ignition switch 110. Alternatively, it is determined whether or not the operation mode has been switched from the second mode to the third mode. If this determination is YES, the process by the ECU 6 proceeds to step S42. If this determination is NO, the process by the ECU 6 returns to step S41.
- step S42 the ECU 6 controls the electric motor 5 so as to realize the S / S start (second start mode). Thereby, the internal combustion engine 4 is started by the above-described S / S start (second start mode). And this process by control of ECU6 is complete
- step S51 the ECU 6 determines that the vehicle speed of the vehicle 3 is a predetermined threshold based on the vehicle speed information of the vehicle 3 acquired by the vehicle speed sensor unit 93. It is determined whether or not (speed threshold value) or less. If this determination is YES, the process by the ECU 6 proceeds to step S52. If this determination is NO, the process by the ECU 6 returns to step S51.
- step S52 the ECU 6 determines whether or not the acceleration of the vehicle 3 is equal to or less than a predetermined threshold (acceleration threshold) based on the acceleration information of the vehicle 3 acquired by the vehicle speed sensor unit 93. If this determination is YES, the process by the ECU 6 proceeds to step S53. If this determination is NO, the process by the ECU 6 returns to step S51.
- a predetermined threshold acceleration threshold
- step S53 the ECU 6 determines, based on the operation mode acquired from the ignition switch 110, whether the operation mode has been switched from the first mode to the second mode or from the second mode to the third mode by the start mode change switch 112. I do. If this determination is YES, the process by the ECU 6 proceeds to step S54. If this determination is NO, the process by the ECU 6 returns to step S51.
- step S54 the ECU 6 controls the electric motor 5 so as to realize the S / S start (second start mode). Thereby, the internal combustion engine 4 is started by the above-described S / S start (second start mode). And this process by control of ECU6 is complete
- the ECU 6 determines whether or not the S / S start (second start mode) is permitted based on a predetermined vehicle start-up condition such as an operation mode, and only the electric motor 5 is used. While the driving force is being supplied from the wheel to the wheel Wr, whether or not the second start mode is permitted is determined based on an EV running condition (whether or not a specific EV running is performed) different from the vehicle starting condition.
- the vehicle start-up condition condition for performing normal start (one start mode) has a usable capacity of the battery as the SOC as one of the conditions.
- the determination condition does not have a usable capacity of the battery as such an SOC as one of the conditions.
- the ECU 6 constituting the starter of the internal combustion engine increases the rotational speed of the internal combustion engine 4 by the electric motor 5 to a predetermined first rotational speed NE1 and starts the internal combustion engine 4 from the first rotational speed NE1.
- the motor 5 is controlled to realize a second starting mode in which the internal combustion engine 4 is started by increasing the rotational speed of the internal combustion engine 4 to the second rotational speed NE2 that is set to a high value and set based on the water temperature.
- the rotational speed difference between the first rotational speed NE1 and the second rotational speed NE2 is A large rotational speed difference of up to 1,500 to 2,000 rpm can be realized without setting a low value and without causing control failure.
- the driver can imagine the sporty driving of the vehicle 3 to be driven before driving by the sound at the start of the internal combustion engine 4 before driving, and can predict the pleasure of driving. .
- the ECU 6 controls the electric motor 5 to set the difference between the rotation speeds of the first rotation speed NE1 and the second rotation speed NE2 to a value based on the water temperature. Thereby, it can be easy to reliably set a large difference in the rotation speed between the first rotation speed NE1 and the second rotation speed NE2.
- it is 200 rpm to 500 rpm. Either a low rotational speed difference is set, or a high rotational speed difference is set to cause control failure.
- the rotation speed difference is not set to a low value and the control fails.
- a large difference in rotational speed such as a maximum of 1,500 to 2,000 rpm can be realized without causing any problems.
- the ECU 6 increases and sets the second rotational speed NE2 based on the water temperature in a region where the water temperature is equal to or higher than the predetermined first temperature TW thr1 and equal to or lower than the second temperature TW thr2 higher than the first temperature.
- the higher second rotational speed NE2 can be easily realized in the second starting mode, the acoustic effect when starting the internal combustion engine 4 can be further enhanced.
- a low rotational speed difference of about 200 rpm to 500 rpm is set, or a high rotational speed difference is set to cause a control failure. Or either.
- the second rotation speed in the second starting mode is set to increase as the refrigerant temperature increases based on the refrigerant temperature as described above, the rotation between the first rotation speed NE1 and the second rotation speed NE2 is performed.
- a large rotational speed difference of 1,500 to 2,000 rpm can be realized without setting the numerical difference to a low value and without causing a control failure.
- the ECU 6 sets the second rotational speed NE2 to a constant value in a region where the water temperature exceeds the second temperature TW thre2 .
- a constant high rotational speed can always be set as the second rotational speed NE2 in the second starting mode. An effect can be produced. For this reason, every time the internal combustion engine 4 is started, a sporty sensation can be given to the driver without any discomfort.
- the ECU 6 sets the second rotational speed NE2 to be equal to or higher than the predetermined lower limit rotational speed and equal to or lower than the predetermined upper limit rotational speed in a region where the water temperature exceeds the second temperature TW thre2 .
- a substantially constant high rotational speed can always be set as the second rotational speed NE2 in the second starting mode. Sound effects can be produced. For this reason, every time the internal combustion engine 4 is started, a sporty feeling can be given to the driver without a sense of incongruity.
- the ECU 6 controls the electric motor 5 to prohibit the realization of the second start mode in a region where the water temperature is lower than the first temperature TW thre1 .
- the ECU 6 controls the electric motor 5 to prohibit the realization of the second start mode in a region where the water temperature is lower than the first temperature TW thre1 .
- the battery unit further includes a battery 9 as a battery that outputs electric power to the electric motor 5, and a limit rotation speed calculation unit 65 that calculates a limit rotation speed BL of the electric motor based on an output limit value of the electric power of the battery 9.
- the ECU 6 as the controller is configured such that the degree of increase of the second rotational speed NE2 is smaller than the degree of increase of the limit rotational speed BL in the region where the water temperature is not lower than the first temperature TW thre1 and not higher than the second temperature TW thre2. Next, the motor 5 is controlled.
- the second rotational speed NE2 can be set.
- the internal combustion engine 4 further includes a start mode changeover switch 112 as a selection unit that supplies driving force to the wheels Wr of the vehicle 3 and changes the driving characteristics of the vehicle 3, and the ECU 6 as the control unit operates the vehicle 3. Based on the characteristics, the second rotational speed NE2 is set. For this reason, the sound production according to the driving characteristic of the vehicle 3 selected by the starting mode changeover switch 112 can be made possible. Further, since the mode selected by the selection unit and the acoustic effect at the start of the internal combustion engine 4 are linked, the driver's satisfaction with respect to the driver's request (sporty vehicle behavior) can be improved.
- the ECU 6 as the control unit performs control for prohibiting the realization of the second starting mode when the difference between the second rotational speed NE2 and the first rotational speed NE1 set based on the water temperature is equal to or less than a predetermined value. 5 is controlled. For this reason, it is possible to prevent the sound effect of the start-up sound of the internal combustion engine 4 that does not satisfy the driver of the vehicle 3 and is not so sporty. Therefore, it becomes possible to avoid impairing the satisfaction of the owner of the vehicle 3 with respect to the vehicle 3, that is, damaging the pride of the owner of the vehicle 3 by owning a sporty luxury car.
- the ECU 6 as the control unit increases the rotational speed of the internal combustion engine 4 to the first rotational speed NE1 based on the first control law and starts the internal combustion engine 4 after starting the internal combustion engine 4 based on the first control law.
- a second starting mode for converging the rotational speed of the internal combustion engine 4 to an idle rotational speed IN equal to or lower than the second rotational speed NE2 based on a second control law different from the first control law.
- the control law is changed, and the second rotational speed is determined by the second control law.
- the rotational speed of the internal combustion engine 4 is converged to the idle rotational speed IN equal to or lower than NE2.
- the time elapses when the internal combustion engine 4 is started Variations can be added to the accompanying sound effects.
- the ECU 6 as the control unit determines that the speed at which the current value of the rotational speed of the internal combustion engine 4 converges to the idle rotational speed IN as the target value of the rotational speed of the internal combustion engine 4 in the first control law.
- the electric motor 5 is controlled so that the current value of the rotational speed of the internal combustion engine 4 becomes larger than the speed at which it converges to the idle rotational speed IN as the target value of the rotational speed of the internal combustion engine 4.
- the rate of change in speed at which the current value of the rotational speed of the internal combustion engine 4 converges to the target value of the rotational speed of the internal combustion engine 4 in the second control law is the speed change rate of the internal combustion engine 4 in the first control law.
- the current value is smaller than the rate of change of the speed at which the current value converges to the target value of the rotational speed of the internal combustion engine 4.
- the ECU 6 as the control unit controls the electric motor 5 so that the rotational speed of the internal combustion engine 4 in the second control law gradually decreases based on a predetermined gradual decrease rate and converges to the idle rotational speed IN.
- the rotational speed of the internal combustion engine 4 is gradually reduced to the idle rotational speed IN based on a predetermined gradual decrease rate. Converge. As a result, after the rotational speed of the internal combustion engine 4 reaches the second rotational speed NE2, a reverberation resemble from reverberant sound produced by the convergence of the rotational speed of the internal combustion engine 4 gradually decreasing to the idle rotational speed IN is produced. can do.
- the ECU 6 as the control unit controls the electric motor 5 so that the rotational speed of the internal combustion engine 4 in the second control law gradually decreases based on a predetermined gradual decrease rate that gradually increases and converges to the idle rotational speed IN. To do.
- the rotational speed of the internal combustion engine 4 reaches the second rotational speed NE2
- the rotational speed of the internal combustion engine 4 converges to the idle rotational speed IN while increasing the degree of gradual decrease.
- the rotational speed of the internal combustion engine 4 reaches the second rotational speed NE2
- the ECU 6 as the control unit controls the electric motor 5 so that feedback control based on the difference between the target rotational speed of the internal combustion engine 4 and the current rotational speed of the internal combustion engine 4 is performed in the first control law.
- the control unit performs control based on the first control law before the rotational speed of the internal combustion engine 4 reaches the second rotational speed NE2, so that the target rotational speed and the internal combustion engine 4 are controlled. Feedback control based on the difference from the current rotational speed is performed.
- the rotational speed of the internal combustion engine 4 can be stably reached up to the second rotational speed NE2 that is the target rotational speed without causing a large overshoot with respect to the target rotational speed.
- the ECU 6 as the control unit controls the electric motor 5 so that the torque rising speed of the electric motor 5 in the first starting mode and the torque starting speed of the electric motor 5 in the second starting mode are substantially the same. Control.
- the rising speed of the torque of the electric motor 5 in the first starting mode and the starting speed of the torque of the electric motor 5 in the second starting mode are substantially the same.
- the low noise in the low rotation range of the internal combustion engine 4 is the same in the first start mode and the second start mode, whereas the first start mode and the second start mode are Therefore, it is possible to emphasize the high-frequency difference in the high rotation range of the internal combustion engine 4 and to further improve the acoustic effect.
- the ECU 6 as the control unit controls the electric motor 5 so that the maximum value of the torque of the electric motor 5 in the first starting mode and the maximum value of the torque of the electric motor 5 in the second starting mode are substantially the same.
- the maximum value of the torque of the electric motor 5 in the first starting mode and the maximum value of the torque of the electric motor 5 in the second starting mode are substantially the same.
- the ECU 6 as the control unit increases the number of rotations of the internal combustion engine 4 by the electric motor 5 to a predetermined first rotation number NE1 and starts the internal combustion engine 4 and a first speed higher than the first rotation number NE1.
- the control for realizing the second start mode in which the internal combustion engine 4 is started by increasing the rotational speed of the internal combustion engine 4 by the electric motor 5 up to two rotational speeds NE2 can be executed on the electric motor 5 as a selection unit.
- the ECU 6 performs control for prohibiting the second start mode on the electric motor 5.
- the second start mode is prohibited. Thereby, when the driver of the vehicle 3 desires to drive quietly, the second starting mode can be prohibited.
- the plurality of operation modes further includes a third mode 123 in which the operation characteristics of the vehicle 3 are superior to the second mode 122,
- the ECU 6 controls the electric motor 5 to realize the second start mode when the start of the vehicle 3 is requested by the ignition switch 110 after the third mode 123 is selected by the start mode switch 112.
- the second start mode is realized when the start of the vehicle 3 is requested by the ignition switch 110 after the third mode 123 is selected by the start mode switch 112.
- the internal combustion engine 4 can be started in the second starting mode based on the clear intention display of the driving vehicle.
- start mode changeover switch 112 as the selection unit has an operation mode in which the driving characteristics of the vehicle 3 are superior to the selected operating mode by one level, and the driving characteristics of the vehicle 3 are in one level higher than the selected operating mode. Only change operation mode to inferior operation mode.
- the operation mode can be changed to the adjacent operation mode by the start mode changeover switch 112. Thereby, it is possible to prevent an abrupt change in the operation mode, that is, an abrupt change in the operation characteristics.
- the ECU 6 as the control unit controls the electric motor 5 to prohibit the second start mode in principle when the operation mode is changed from the second mode 122 to the third mode 123 by the start mode switch 112 as the selection unit. Against.
- hesitation means a state in which no driving force is temporarily generated. More specifically, the hesitation means a response delay of the vehicle when the accelerator pedal is depressed, that is, when the throttle valve is operated, and is generally a temporary event that occurs in a short time during or after the accelerator is depressed. This means a reduction in engine output.
- the ECU 6 as the control unit increases the number of rotations of the internal combustion engine 4 by the electric motor 5 to a predetermined first rotation number NE1 and starts the internal combustion engine 4 and a first speed higher than the first rotation number NE1.
- Control that realizes the second starting mode in which the internal combustion engine 4 is started by increasing the rotational speed of the internal combustion engine 4 by the electric motor 5 up to two rotational speeds NE2 can be selectively executed on the electric motor 5 and the determination is made.
- the unit 62 determines whether or not the second start mode is permitted based on predetermined vehicle start-up conditions (EV stop state, EV low speed state, EV sailing state, etc.) during EV travel. While driving force is being supplied to the wheels, whether or not the second starting mode is permitted is determined based on EV running conditions (EV stop state, EV low speed state, EV sailing state, etc.) that are different from the vehicle starting conditions. Specially To.
- the conditions for starting the internal combustion engine 4 according to the second starting mode are different between when the vehicle 3 is started and when the EV is running.
- the internal combustion engine 4 is started in the second start mode based on the state of the vehicle 3 being a specific EV traveling state such as an EV stop state, an EV low speed state, an EV sailing state, or the like. Can be done.
- the battery further includes a battery unit as a battery for supplying power to the electric motor 5 and a capacity acquisition unit 61 for acquiring a usable capacity of the battery.
- the EV running condition does not have a usable capacity of the battery 9.
- the vehicle 3 that is traveling in the EV satisfies the condition that the SOC (State Of Charge) value can be traveled on the EV, and assumes that this is the case, so the internal combustion engine 4 is started in the second start mode.
- the judgment items by the ECU can be reduced, and the start of the internal combustion engine 4 in the second start mode according to the driver's request can be made easier to use in the vehicle 3 that is traveling by EV.
- the vehicle 3 further includes a traveling state acquisition unit 63 that acquires the traveling state of the vehicle 3, and there are a plurality of EV traveling conditions, and a unique EV traveling condition is set for each traveling state of the vehicle 3.
- the EV running condition further includes a brake unit including a brake for the wheel Wr, a brake pedal for operating the brake according to the operation amount, and a speed sensor unit 93 for acquiring the speed of the vehicle 3.
- the brake pedal is operated and the speed of the vehicle 3 is zero.
- the vehicle further includes a speed sensor unit (vehicle speed sensor unit 93) that acquires the speed of the vehicle 3 and the acceleration of the vehicle 3, and the EV traveling condition is that the speed of the vehicle 3 is greater than 0 and less than or equal to a threshold for speed, and The vehicle 3 has a condition that the acceleration is equal to or less than the acceleration threshold.
- a speed sensor unit vehicle speed sensor unit 93
- the transmission 7 is a transmission that shifts the input from at least one of the internal combustion engine 4 and the electric motor 5 and outputs it to the wheels Wr, and the shift state acquisition unit 64 that acquires the shift state of the transmission 7.
- the vehicle further includes an internal combustion engine unit and a speed sensor unit (vehicle speed sensor unit 93) that acquires the deceleration of the vehicle 3, and the EV traveling condition is that the state of the transmission 7 is neutral and the vehicle 3 It is preferable to have a condition that the speed is equal to or less than a deceleration threshold.
- crankshaft of the internal combustion engine 4 is directly connected to the output shaft of the electric motor 5 without a clutch. For this reason, control of the electric motor 5 by ECU6 can be simplified. Further, the acoustic characteristics of the start of the internal combustion engine 4 according to the second start mode can be made more effective. Further, vibration generated by the internal combustion engine 4 and the electric motor 5 can be suppressed.
- the ECU 6 sets the second rotational speed NE2 to a constant value in a region where the water temperature exceeds TW thr2 (second temperature), but is not limited thereto.
- TW thr2 second temperature
- the ECU 6 sets the second rotational speed NE2 to be equal to or higher than a predetermined lower limit rotational speed and equal to or lower than a third rotational speed ES3 that is a predetermined upper limit rotational speed. May be.
- the value of the second rotational speed NE2 may be changed based on the operation mode.
- the second rotational speed NE2 increases linearly as the water temperature rises when the water temperature is equal to or higher than a predetermined temperature TW thre1 (first temperature) and TW thre2 (second temperature).
- TW thre1 first temperature
- second temperature second temperature
- the ECU 6 sets the second rotational speed NE2 to be the same as the first rotational speed NE1.
- the motor 5 may be controlled to be reset and prohibit the realization of the second start mode.
- crankshaft of the internal combustion engine 4 is connected to the output shaft of the electric motor 5 without being connected to the clutch, that is, directly connected, but is not limited thereto.
- the crankshaft of the internal combustion engine 4 and the output shaft of the electric motor 5 may be connected via a clutch 131 as shown in FIG.
- FIG. 12 is a diagram showing a vehicle 3A equipped with a starter for an internal combustion engine according to a modification of the embodiment of the present invention.
- the electric motor 5 or the internal combustion engine 4 drives the rear wheel Wr, and the front wheel Wf is driven by the electric motors 2A and 2B.
- the vehicle 3 is not limited to this configuration.
- FIG. 13 is a diagram showing a vehicle 3B equipped with an internal combustion engine starter according to a modification of the embodiment of the present invention.
- the ECU 6 performs control for prohibiting the realization of the second start mode in the region where the water temperature is lower than the first temperature TW thre1, but the present invention is not limited to this.
- the EDU 6 as the control unit controls the electric motor 5 to prohibit the realization of the second start mode in a region where the temperature of the cooling water as the refrigerant is lower than the first temperature TW thre1 by a predetermined temperature. You may go.
- the S / S start (second start mode) may be prohibited. As a result, it is possible to prevent the occurrence of a problem that the acoustic effect expected by the driver cannot be obtained.
- the S / S start may be prohibited. In this way, when at least one of the internal combustion engine 4, the electric motor 5, and the battery 9 has failed, the internal combustion engine 4 can be started more reliably than when the S / S start is performed. Can be prioritized.
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Abstract
Description
本実施形態に係る内燃機関の始動装置を有する車両3は、ハイブリッド車両である。図1に示すように、車両3は、第1駆動装置1と、第2駆動装置2と、これらの駆動装置を制御する制御部を構成する制御装置としての電子制御ユニット(以下、「ECU6」という。)6と、PDU(パワードライブユニット)8と、バッテリ9と、を備える。
図6に示すように、イグニッションスイッチ110(図2参照)のボタンスイッチ111を押すこと(IG)により車両3は起動する。このとき、始動態様切替スイッチ112によって既に選択された各モードにより、内燃機関4の始動、又は、EV走行モードへの移行が行われる。
内燃機関4が始動しているとき、又は、EV走行モードへ移行しているときに、始動態様切替スイッチ112が、ファーストモードからセカンドモードへ切替えられたか、又は、セカンドモードからファーストモードへ切替えられた場合には、引き続き、内燃機関4が始動している状態(Fi3、Se3)、又は、EV走行モードの状態(Fi5、Se5)が継続される。
図7は、本発明の実施形態に係る内燃機関の始動装置におけるS/S始動判定処理を示すフローチャートである。図8は、本発明の実施形態に係る内燃機関の始動装置における車両起動時のS/S始動判定処理を示すフローチャートである。図9は、本発明の実施形態に係る内燃機関の始動装置におけるEVセーリング時の始動判定処理を示すフローチャートである。図10は、本発明の実施形態に係る内燃機関の始動装置におけるEV停車時のS/S始動判定処理を示すフローチャートである。図11は、本発明の実施形態に係る内燃機関の始動装置におけるEV低速状態時のS/S始動判定処理を示すフローチャートである。
内燃機関の始動装置を構成するECU6は、所定の第1回転数NE1まで内燃機関4の回転数を電動機5によって増加させて内燃機関4を始動する第1始動態様と、第1回転数NE1より高く設定されかつ水温に基づき設定される第2回転数NE2まで内燃機関4の回転数を電動機5によって増加させて内燃機関4を始動する第2始動態様と、を実現する制御を、電動機5に対して行う。
例えば、本実施形態では、ECU6は、水温がTWthre2(第2温度)を超える領域では、第2回転数NE2を一定の値に設定したが、これに限定されない。例えば、ECU6は、冷却水の温度がTWthre2(第2温度)を超える領域では、第2回転数NE2を所定の下限回転数以上且つ所定の上限回転数である第3回転数ES3以下に設定してもよい。また、運転モードに基づき、第2回転数NE2の値を変更してもよい。
4…内燃機関
5…電動機
6…ECU(制御部)
7…トランスミッション(変速機)
9…バッテリ(蓄電器)
61…容量取得部
62…判定部
63…走行状態取得ユニット
64…変速状態取得部
65…限界回転数算出部
91…クランク角センサ(回転数取得部)
92…水温センサ(温度取得部)
93…車速センサユニット(速度センサユニット)
110…イグニッションスイッチ(起動ユニット)
112…始動態様切替スイッチ(選択ユニット)
121…ファーストモード
122…セカンドモード
123…サードモード
IN…アイドル回転数
NE1…第1回転数
NE2…第2回転数
TWthre1…温度(第1温度)
TWthre2…温度(第2温度)
Wr…車輪
Claims (12)
- 内燃機関と、冷媒により前記内燃機関を冷却する冷却部と、前記冷媒の温度を取得する温度取得部と、前記内燃機関の回転数を取得する回転数取得部と、を備える内燃機関ユニットと、
前記内燃機関を始動する電動機と、前記電動機を制御する制御部と、を備える電動機ユニットと、を有し、
前記制御部は、所定の第1回転数まで前記内燃機関の回転数を前記電動機によって増加させて前記内燃機関を始動する第1始動態様と、前記第1回転数より高く設定されかつ前記冷媒の温度に基づき設定される第2回転数まで前記内燃機関の回転数を前記電動機によって増加させて前記内燃機関を始動する第2始動態様と、を実現する制御を、前記電動機に対して行う
ことを特徴とする内燃機関の始動装置。 - 前記制御部は、前記第1回転数と前記第2回転数との回転数の差を前記冷媒の温度に基づく値に設定する制御を、前記電動機に対して行う
請求項1に記載の内燃機関の始動装置。 - 前記制御部は、前記冷媒の温度が所定の第1温度以上、かつ、前記第1温度より高い第2温度以下の領域では、前記冷媒の温度に基づき前記第2回転数を増加させて設定する
請求項1又は2に記載の内燃機関の始動装置。 - 前記制御部は、前記冷媒の温度が前記第2温度を超える領域では、前記第2回転数を一定の値に設定する
請求項3に記載の内燃機関の始動装置 - 前記制御部は、前記冷媒の温度が前記第2温度を超える領域では、前記第2回転数を所定の下限回転数以上且つ所定の上限回転数以下に設定する
請求項3に記載の内燃機関の始動装置。 - 前記制御部は、前記冷媒の温度が前記第1温度未満の領域では、前記第2始動態様の実現を禁止する制御を、前記電動機に対して行う
請求項3~5のいずれか1項に記載の内燃機関の始動装置。 - 前記制御部は、前記冷媒の温度が前記第1温度よりも所定温度低い温度未満の領域では、前記第2始動態様の実現を禁止する制御を、前記電動機に対して行う
請求項3~5のいずれか1項に記載の内燃機関の始動装置。 - 前記電動機に電力を出力する蓄電器と、前記蓄電器の電力の出力限界値に基づく前記電動機の限界回転数を算出する限界回転数算出部と、を備える蓄電器ユニットを更に備え、
前記制御部は、前記冷媒の温度が前記第1温度以上かつ前記第2温度以下の領域では、前記限界回転数の増加する度合より前記第2回転数の増加する度合が小さくなるように、前記電動機に対して制御を行う
ことを特徴とする
請求項3~7のいずれか1項に記載の内燃機関の始動装置。 - 前記内燃機関は車両の車輪に駆動力を供給し、
前記車両の運転特性を変更する選択ユニットを更に備え、
前記制御部は、前記車両の運転特性に基づき前記第2回転数を設定する
請求項1~8のいずれか1項に記載の内燃機関の始動装置。 - 前記制御部は、前記冷媒の温度に基づき設定される前記第2回転数と前記第1回転数の差が所定値以下の場合には、前記第2始動態様の実現を禁止する制御を前記電動機に対して制御を行う
請求項1~9のいずれか1項に記載の内燃機関の始動装置。 - 請求項1~10いずれか1項に記載の内燃機関の始動装置を有する車両。
- 予め定められた第1回転数まで内燃機関の回転数を電動機によって増加させて前記内燃機関を始動する第1始動態様と、前記第1回転数より高く設定され且つ冷媒の温度に基づき設定される第2回転数まで前記内燃機関の回転数を前記電動機によって増加させて前記内燃機関を始動する第2始動態様と、を選択的に実現する
ことを特徴とする内燃機関の始動方法。
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CN201580080757.9A CN107614341B (zh) | 2015-06-11 | 2015-06-11 | 内燃机的起动装置、车辆以及内燃机的起动方法 |
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