WO2014017199A1 - 車両の制御装置および車両の制御方法 - Google Patents
車両の制御装置および車両の制御方法 Download PDFInfo
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- WO2014017199A1 WO2014017199A1 PCT/JP2013/066116 JP2013066116W WO2014017199A1 WO 2014017199 A1 WO2014017199 A1 WO 2014017199A1 JP 2013066116 W JP2013066116 W JP 2013066116W WO 2014017199 A1 WO2014017199 A1 WO 2014017199A1
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- battery
- relay
- motor generator
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- engine
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- 230000004044 response Effects 0.000 description 3
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- 230000004048 modification Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
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Classifications
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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
- B60L1/00—Supplying electric power to auxiliary equipment of vehicles
-
- 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
- B60L3/00—Electric devices on electrically-propelled vehicles for safety purposes; Monitoring operating variables, e.g. speed, deceleration or energy consumption
- B60L3/0092—Electric devices on electrically-propelled vehicles for safety purposes; Monitoring operating variables, e.g. speed, deceleration or energy consumption with use of redundant elements for safety purposes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L50/00—Electric propulsion with power supplied within the vehicle
- B60L50/10—Electric propulsion with power supplied within the vehicle using propulsion power supplied by engine-driven generators, e.g. generators driven by combustion engines
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
- B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
- B60L58/18—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries of two or more battery modules
- B60L58/20—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries of two or more battery modules having different nominal voltages
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R16/00—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for
- B60R16/02—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R16/00—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for
- B60R16/02—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements
- B60R16/03—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements for supply of electrical power to vehicle subsystems or for
- B60R16/033—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements for supply of electrical power to vehicle subsystems or for characterised by the use of electrical cells or batteries
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W10/00—Conjoint control of vehicle sub-units of different type or different function
- B60W10/24—Conjoint control of vehicle sub-units of different type or different function including control of energy storage means
- B60W10/26—Conjoint control of vehicle sub-units of different type or different function including control of energy storage means for electrical energy, e.g. batteries or capacitors
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W30/00—Purposes of road vehicle drive control systems not related to the control of a particular sub-unit, e.g. of systems using conjoint control of vehicle sub-units
- B60W30/18—Propelling the vehicle
- B60W30/18009—Propelling the vehicle related to particular drive situations
- B60W30/18109—Braking
- B60W30/18127—Regenerative braking
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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
- F02N11/006—Starting of engines by means of electric motors using a plurality of electric motors
-
- 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
-
- 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
- F02N11/08—Circuits or control means specially adapted for starting of engines
- F02N11/0862—Circuits or control means specially adapted for starting of engines characterised by the electrical power supply means, e.g. battery
- F02N11/0866—Circuits or control means specially adapted for starting of engines characterised by the electrical power supply means, e.g. battery comprising several power sources, e.g. battery and capacitor or two batteries
-
- 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
- F02N11/08—Circuits or control means specially adapted for starting of engines
- F02N11/087—Details of the switching means in starting circuits, e.g. relays or electronic switches
-
- 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
- F02N11/10—Safety devices
- F02N11/108—Safety devices for diagnosis of the starter or its components
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/327—Testing of circuit interrupters, switches or circuit-breakers
- G01R31/3277—Testing of circuit interrupters, switches or circuit-breakers of low voltage devices, e.g. domestic or industrial devices, such as motor protections, relays, rotation switches
- G01R31/3278—Testing of circuit interrupters, switches or circuit-breakers of low voltage devices, e.g. domestic or industrial devices, such as motor protections, relays, rotation switches of relays, solenoids or reed switches
-
- 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
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L2260/00—Operating Modes
- B60L2260/20—Drive modes; Transition between modes
- B60L2260/26—Transition between different drive modes
-
- 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
- F02N2250/00—Problems related to engine starting or engine's starting apparatus
- F02N2250/02—Battery voltage drop at start, e.g. drops causing ECU reset
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/005—Testing of electric installations on transport means
- G01R31/006—Testing of electric installations on transport means on road vehicles, e.g. automobiles or trucks
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/7072—Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
Definitions
- the present invention relates to a vehicle control device and a control method.
- a main battery electrically coupled to a starter a sub battery electrically coupled to an electric load of the vehicle, a main battery and a sub battery
- a technology that includes a relay that can be switched on / off by whether or not the battery is electrically coupled, and operates the starter by turning off the relay when restarting after automatic engine stop JP 2008-82275A.
- the following problem occurs when an off-fixation failure occurs in which the relay between the main battery and the sub-battery continues to be turned off.
- a relay off-fixing failure occurs when a command to turn on the relay is issued and the alternator tries to charge the main battery and the sub battery, the sub battery cannot be charged. The voltage decreases, and there is a possibility that insufficient power supply from the sub-battery to the electric load occurs.
- An object of the present invention is to detect an off-fixing failure of a relay between a main battery and a sub battery.
- a control device for a vehicle is electrically coupled to a motor generator mechanically coupled to an output shaft of an engine, a first battery electrically coupled to the motor generator, and an electrical load of the vehicle.
- the second battery a relay that can switch whether the first battery and the second battery are electrically coupled or not can be switched on / off by itself, and the relay is turned off during the power running operation of the motor generator so that the motor generator can be regenerated.
- Relay control means for turning on the relay during operation is provided.
- the voltage of the second battery is equal to or lower than the predetermined voltage or the second battery is charged while the motor generator is in the regenerative operation and the command to turn on the relay is issued.
- Relay failure diagnosis means for determining that the relay is stuck off when the current is less than or equal to the predetermined current is provided.
- FIG. 1 is a schematic configuration diagram of a vehicle control device according to an embodiment.
- FIG. 2 is a control system diagram of the gasoline engine.
- FIG. 3 is a detailed circuit configuration diagram including a main battery, a sub battery, a relay box including a relay, and an engine control module.
- FIG. 4 is a diagram illustrating timing for diagnosing a relay-off stuck failure.
- FIG. 1 is a schematic configuration diagram of a vehicle control device according to an embodiment.
- a vehicle 1 is provided with an engine 2, a motor generator 21, and an air conditioner compressor 31.
- the output shaft 3 of the engine 2, the rotating shaft 22 of the motor generator 21, and the rotating shaft 32 of the air conditioner compressor 31 are arranged in parallel, and the crank pulley 4 is connected to the rotating shafts 22 and 32 at one end of the output shaft 3.
- the pulleys 23 and 33 are attached to each other.
- a belt 5 is wound around each of the three pulleys 4, 23, and 33, and power is transmitted (conducted) between the output shaft 3 and the rotary shafts 23 and 33 of the engine 2 by the belt 5.
- the starter 6 is used for starting the engine 2.
- a torque converter 8 and a belt type automatic transmission 9 are connected to the other end of the output shaft 3 of the engine 2.
- the torque converter 8 has a pump impeller and a turbine runner (not shown).
- the belt-type automatic transmission 9 includes a primary pulley and a secondary pulley (not shown) and a steel belt that is wound around these pulleys. The rotational driving force of the engine 2 is finally transmitted to vehicle drive wheels (not shown) via the torque converter 8 and the automatic transmission 9.
- a main battery 41 and a sub battery 42 are provided as a power source for the vehicle 1. Both are 14V batteries.
- Two relays 43a and 43b arranged in parallel are connected between the two batteries 41 and. The reason why the two relays 43a and 43b are provided is for backup when one of the relays breaks down, and also for extending the number of durable operation times of the relay as compared with the case where only one relay is provided. .
- the starter 6 and the motor generator 21 are connected between the main battery 41 and the relays 43a and 43b, and power is supplied from the main battery 41. Since motor generator 21 is composed of an AC machine, inverter 24 for converting DC from main battery 41 to AC is attached.
- the electric load 44 is a load that does not affect its operation even when a voltage drop occurs in which the voltage of the battery instantaneously decreases, and power is supplied from the main battery 41.
- the electrical load 45 is a load that affects its own operation when an instantaneous drop occurs, and power is supplied from the sub-battery 42.
- the engine control module (ECM) 51 controls the engine 2, the starter 6, the motor generator 21, and the relays 43a and 43b. For example, the engine control module 51 turns off the relays 43 a and 43 b during the power running operation of the motor generator 21 to disconnect the electrical connection between the main battery 41 and the sub battery 42, and the relay 43 a or 43 b during the regenerative operation of the motor generator 21.
- the main battery 41 and the sub-battery 42 are electrically coupled by turning on 43b. Further, the engine control module 51 diagnoses whether an off-fixing failure of the relays 43a and 43b has occurred by a method described later.
- Fig. 2 is a control system diagram of a gasoline engine. Each intake port (not shown) is provided with a fuel injection valve 7. The fuel injection valve 7 supplies fuel to the engine 2 intermittently.
- the intake passage 11 is provided with an electronically controlled throttle valve 12, and the throttle motor 13 controls the opening of the throttle valve 12 (hereinafter referred to as "throttle opening").
- the actual throttle opening is detected by the throttle sensor 14 and input to the engine control module 51.
- the engine control module 51 receives an accelerator opening signal (amount of depression of the accelerator pedal 52) from the accelerator sensor 53, a crank angle signal from the crank angle sensor 54, and an intake air amount signal from the air flow meter 55. The From the signal of the crank angle sensor 54, the rotational speed of the engine 2 is calculated. The engine control module 51 calculates the target intake air amount and the target fuel injection amount based on these signals, and the throttle motor 13 and each fuel injection valve 7 so as to obtain the target intake air amount and the target fuel injection amount. Command.
- the control of the intake air amount will be outlined (see JP 9-287513A).
- the target basic intake air amount and the target equivalent ratio tDML are respectively calculated.
- a value obtained by dividing the target basic intake air amount by the target equivalent ratio tDML is set as the target intake air amount.
- the target throttle valve opening is obtained by searching a predetermined map from the target intake air amount and the engine speed.
- the target throttle valve opening is converted into a command value and output to the throttle motor 13.
- control of fuel injection (fuel injection amount and fuel injection timing) will be outlined.
- the output of the air flow meter 55 is A / D converted and linearized to calculate the intake air amount Qa.
- Tp Tp0 ⁇ Fload + Tp ⁇ 1 ⁇ (1 ⁇ Fload)
- Fload weighted average coefficient
- Tp-1 Previous Tp
- the cylinder air amount equivalent pulse width Tp [ms] is obtained by This is because the air amount flowing into the cylinder (combustion chamber) (that is, the cylinder air amount) has a response delay with respect to the intake air amount in the air flow meter section, and this response delay is approximated by a primary delay.
- the weighted average coefficient Fload [nameless number] which is a coefficient of the first order lag is obtained by searching a predetermined map from the product Ne ⁇ V of the rotational speed Ne and the cylinder volume V and the total flow path area Aa of the intake pipe.
- tDML target equivalent ratio [anonymous number]
- ⁇ Air-fuel ratio feedback correction coefficient [anonymous number]
- ⁇ m Air-fuel ratio learning value [anonymous number]
- Ts Invalid injection pulse width [anonymous number]
- the gasoline engine 2 has a spark plug facing the combustion chamber (cylinder).
- the engine control module 51 generates a spark in the spark plug by cutting off the primary current of the ignition coil at a predetermined time before the compression top dead center, thereby igniting the air-fuel mixture in the combustion chamber.
- the engine control module 51 drives the starter 6 to start the engine 2 when it is determined that there is an initial start request based on a signal from the starter switch 56.
- the idle stop permission condition is not satisfied. If the idle stop permission condition is not satisfied, the engine 2 is cranked using the motor generator 21 as a starter, the fuel injection from the fuel injection valve 7 and the spark ignition by the spark plug are restarted, and the engine 2 is restarted. .
- the starter 6 can be used less frequently and the starter 6 can be protected.
- the engine control module 51 cuts off both the two relays 43a and 43b to electrically disconnect the main battery 41 and the sub-battery 42. This prevents the voltage of the sub-battery 42 from fluctuating with the starting operation of the engine 2.
- the vehicle 1 is provided with an automatic transmission control unit (CVTCU) 61.
- the automatic transmission control unit 61 controls the gear ratio of the automatic transmission 9 in a stepless manner according to the vehicle running conditions determined from the vehicle speed and the throttle opening.
- the torque converter 8 having a pump impeller and a turbine runner is provided with a mechanical lockup clutch for fastening and releasing the pump impeller and the turbine runner.
- the travel range of the vehicle that engages the lockup clutch is predetermined as a lockup region (vehicle speed and throttle opening are used as parameters).
- the automatic transmission control unit 61 engages the lock-up clutch to directly connect the engine 2 and the transmission 9 when the vehicle driving condition is in the lock-up region, and the vehicle driving condition is not in the lock-up region. Sometimes the lockup clutch is released. When the engine 2 and the transmission 9 are in a directly connected state, the torque converter 8 does not absorb the torque, and the fuel efficiency is improved accordingly.
- the vehicle 1 also includes a vehicle dynamics control unit (VDCCU) 62, a vehicle speed-sensitive electric power steering control unit (EPSCU) 63, an air conditioner auto amplifier 64, and a combination meter 66. Is provided.
- VDCCU vehicle dynamics control unit
- EPSCU vehicle speed-sensitive electric power steering control unit
- the vehicle speed sensitive electric power steering control unit 63 outputs an optimum assist torque signal to the EPS motor from the steering torque input from the torque sensor and the vehicle speed.
- the above automatic transmission control unit 61, vehicle dynamic control unit 62, vehicle speed sensitive power steering control unit 63, and combination meter 66 are electric loads that cannot tolerate a voltage drop. Therefore, these are supplied with power from the sub-battery 42.
- the engine control module 51 and each of the three control units 61 to 63, the air conditioner auto amplifier (A / C Amp) 64, and the combination meter 66 are connected by CAN (Controller Area Network).
- a vehicle speed signal is input from the combination meter 66 to the engine control module 51.
- the motor generator 21 is used not only for engine restart from idle stop but also for torque assist during vehicle travel.
- the main battery 41 is used as a power source so that the engine 2 is torque-assisted, and a predetermined assist torque is generated in the motor generator 21.
- torque assist is prohibited, no assist torque is generated.
- the inverter 24 and the engine control module 51 are connected by LIN (Local Interconnect Network). Via the LIN, the engine control module 51 instructs the inverter 24 whether to drive the motor generator 21 or to generate electric power with the motor generator 21 or how much current to flow to drive the motor.
- LIN Local Interconnect Network
- FIG. 3 is a detailed circuit configuration diagram including the main battery 41, the sub-battery 42, the relay box 43 including the relays 43a and 43b, and the engine control module 51.
- the engine control module 51 detects the voltage of the main battery 41 and the voltage of the sub battery 42.
- the engine control module 51 also reads the charge / discharge current of the main battery 41 detected by the current sensor 71 and the charge / discharge current of the sub-battery 42 detected by the current sensor 72.
- the SOC State OfOCharge
- the charge / discharge balance of the main battery 41 is managed based on the SOC
- the sub battery 42 The SOC of the sub-battery 42 is calculated based on the charging / discharging current, and the balance of charging / discharging of the sub-battery 42 is managed.
- the engine control module 51 alternately turns on one of the relays 43a and 43b when the relays 43a and 43b are normally turned on and when the relays 43a and 43b are turned on normally. . More specifically, both of the relays 43a and 43b are turned off during the power running operation of the motor generator 21, and one of the relays 43a and 43b is turned on during the regenerative operation of the motor generator 21. As a result, the relays 43a and 43b can be evenly consumed, and the number of durability operations can be increased as compared with the case where only one relay is provided.
- the command is turned on based on the voltage of the sub-battery 42 or the charging / discharging current of the sub-battery 42 in a state where a command to turn on one of the relays 43a and 43b is issued. It is determined that an off-fixation failure has occurred in which the relays 43a and 43b that have been commanded are fixed in the OFF state.
- FIG. 4 is a diagram showing timing for diagnosing a relay-off stuck failure.
- the vehicle speed V, the state of the engine 2, the states of the relays 43 a and 43 b, and the state of the relay-off sticking diagnosis are shown in order from the top.
- a command to turn on one of the relays 43a and 43b is issued, such as when the engine 2 is stopped after the initial start, when the vehicle is accelerated or decelerated, or after restarting from an idle stop. Execute relay off adhesion diagnosis.
- either one of the relays 43a and 43b is turned on to charge the main battery 41 and the sub battery 42 by supplying a charging current.
- the relay battery is fixed when the voltage of the sub battery 42 is reduced to a predetermined voltage or lower or the charging current is lower than the predetermined current. It is determined that a failure has occurred.
- the relay-off stuck diagnosis can be performed by the above-described method, the degree of decrease in the voltage of the sub-battery 42 when a relay-off stuck failure occurs also varies depending on the operating current of the load 45, the charged state and the deteriorated state of the sub-battery 42. To do. Therefore, in the following, a method for determining that a relay-off stuck failure has occurred when the first condition or the second condition is satisfied according to the voltage difference between the main battery 41 and the sub-battery 42 will be described.
- the case where the first condition is satisfied is a case where all of the following conditions (a) to (c) are satisfied.
- a command is issued to turn on one of the relays 43a and 43b.
- B) The ignition switch is turned on.
- C) The voltage difference between the main battery 41 and the sub-battery 42 is not less than a first predetermined voltage (for example, 1.04 V) and the discharge current is flowing from the sub-battery 42 for a first predetermined time (for example, , 25.5 sec) elapsed
- the first predetermined voltage is determined in advance based on the maximum voltage difference V1 between the batteries that is theoretically generated in a steady state where a steady current flows between the main battery 41 and the sub-battery 42. More specifically, the first predetermined voltage is set to a value higher than the maximum voltage difference V1.
- the maximum voltage difference V1 between the batteries that is theoretically generated in a steady state where a steady current flows is expressed by the following equation (1).
- the harness resistance value in the expression (1) is the resistance value of the harness between the main battery 41 and the sub battery 42.
- Maximum voltage difference V1 Voltage drop in relays 43a and 43b + (harness resistance value ⁇ maximum value of steady energizing current) + voltage detection error of engine control module 51 (1)
- the voltage difference between the main battery 41 and the sub battery 42 is turned on if the relay to which the command is issued is turned on. Does not exceed the aforementioned maximum voltage difference V1. That is, if the voltage difference between the main battery 41 and the sub-battery 42 is equal to or greater than the first predetermined voltage, it can be determined that a relay-off stuck failure has occurred.
- the first predetermined time is a relatively long time (in order to determine that the relay-off fixing failure has occurred in a state in which the voltage difference between the batteries is equal to or greater than the first predetermined voltage.
- the maximum value that can be set by the engine control module 51 is set.
- the case where the second condition is satisfied is a case where all of the above conditions (a), (b) and the following (d) are satisfied.
- the second predetermined voltage is determined in advance based on the maximum voltage difference V2 between the batteries that is theoretically generated in a state where a transient current flows between the main battery 41 and the sub-battery 42. More specifically, the second predetermined voltage is set to a value higher than the maximum voltage difference V2.
- the maximum voltage difference V2 between the batteries that is theoretically generated in a state where the transient current flows is expressed by the following equation (2).
- Maximum voltage difference V2 Voltage drop in relays 43a and 43b + (harness resistance value ⁇ maximum value of transient energization current) + voltage detection error of engine control module 51 (2)
- the second predetermined time is set to a value that is as short as possible and does not cause a false diagnosis due to a minute voltage fluctuation such as noise.
- the first condition and the second condition are a reduction in assist power of the electric power steering, which may occur at the time of relay-off fixing failure, inability to operate the vehicle dynamic control (motor), stop of the assist power of the electric power steering, and a CVT solenoid. It can be set in consideration of valve stoppage and vehicle dynamic control (actuator) inoperability.
- the motor generator 21 mechanically coupled to the output shaft of the engine, the main battery 41 electrically coupled to the motor generator 21, and the electric load of the vehicle
- a sub-battery 42 electrically coupled to the main battery 41 and relays 43a and 43b capable of switching whether or not the main battery 41 and the sub-battery 42 are electrically coupled to each other. Control is performed to turn off the relays 43a and 43b during the power running operation and to turn on the relay 43a or 43b during the regenerative operation of the motor generator 21.
- the voltage of the sub-battery 42 is equal to or lower than a predetermined voltage or the sub-battery while the motor generator 21 is in the regenerative operation and the command to turn on the relay 43a or 43b is issued.
- the charging current of 42 is equal to or less than the predetermined current, it is determined that the relay 43a or 43b is fixed off.
- the relays 43a and 43b is on, charging current is supplied to the main battery 41 and the sub-battery 42 and charging is performed, but an on command is issued.
- the sub-battery 42 cannot be charged, and only the sub-battery 42 is discharged, and the voltage continues to decrease. Therefore, when the motor generator 21 is in the regenerative operation and the command to turn on the relay 43a or 43b is issued, the voltage of the sub-battery 42 falls below a predetermined voltage or the charging current is predetermined. If the current is equal to or lower than the current, it is possible to reliably detect that a relay-off stuck failure has occurred.
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Abstract
Description
Tp=Tp0×Fload+Tp-1×(1-Fload)
ただし、Fload:加重平均係数、
Tp-1:前回のTp、
の式によりシリンダ空気量相当パルス幅Tp[ms]を求める。これは、シリンダ(燃焼室)に流入する空気量(つまりシリンダ空気量)がエアフローメータ部での吸入空気量に対して応答遅れを有するので、この応答遅れを一次遅れで近似したものである。一次遅れの係数である加重平均係数Fload[無名数]は、回転速度Ne及びシリンダ容積Vの積Ne・Vと吸気管の総流路面積Aaから所定のマップを検索することにより求める。このようにして求めたシリンダ空気量相当パルス幅Tpに基づいて、燃料噴射弁7に与える燃料噴射パルス幅Ti[ms]を、
Ti=Tp×tDML×(α+αm-1)×2+Ts
ただし、tDML:目標当量比[無名数]、
α:空燃比フィードバック補正係数[無名数]、
αm:空燃比学習値[無名数]、
Ts:無効噴射パルス幅[無名数]、
の式により算出する。そして、所定の燃料噴射時期になったときに、この燃料噴射パルス幅Tiの期間、燃料噴射弁7を開く。
(a)リレー43a、43bのいずれか一方をオンにする指令が出されている。
(b)イグニッションスイッチをオンにしている。
(c)メインバッテリ41およびサブバッテリ42の電圧差が第1の所定電圧(例えば、1.04V)以上、かつ、サブバッテリ42から放電電流が流れている状態で、第1の所定時間(例えば、25.5sec)経過
Claims (2)
- エンジンの出力軸に機械的に結合されたモータジェネレータと、
前記モータジェネレータと電気的に結合された第1バッテリと、
車両の電気負荷と電気的に結合された第2バッテリと、
前記第1バッテリおよび前記第2バッテリを電気的に結合するか否かを自身のオン/オフにより切替可能なリレーと、
前記モータジェネレータの力行運転中は前記リレーをオフにして前記第1バッテリおよび前記第2バッテリの電気的結合を切断し、前記モータジェネレータの回生運転中は前記リレーをオンにして前記第1バッテリおよび前記第2バッテリを電気的に結合するリレー制御手段と、
前記モータジェネレータの回生運転中であって、かつ、前記リレーをオンにする指令が出されている状態で、前記第2バッテリの電圧が所定電圧以下、または前記第2バッテリの充電電流が所定電流以下である場合に、前記リレーがオフ固着していると判定するリレー故障診断手段と、
を備える車両の制御装置。 - エンジンの出力軸に機械的に結合されたモータジェネレータと、
前記モータジェネレータと電気的に結合された第1バッテリと、
車両の電気負荷と電気的に結合された第2バッテリと、
前記第1バッテリおよび前記第2バッテリを電気的に結合するか否かを自身のオン/オフにより切替可能なリレーと、
を備える車両の制御方法において、
前記モータジェネレータの力行運転中は前記リレーをオフにして前記第1バッテリおよび前記第2バッテリの電気的結合を切断し、前記モータジェネレータの回生運転中は前記リレーをオンにして前記第1バッテリおよび前記第2バッテリを電気的に結合する工程と、
前記モータジェネレータの回生運転中であって、かつ、前記リレーをオンにする指令が出されている状態で、前記第2バッテリの電圧が所定電圧以下、または前記第2バッテリの充電電流が所定電流以下である場合に、前記リレーがオフ固着していると判定する工程と、
を備える車両の制御方法。
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