WO2014157114A1 - エンジン回転制御システム - Google Patents
エンジン回転制御システム Download PDFInfo
- Publication number
- WO2014157114A1 WO2014157114A1 PCT/JP2014/058136 JP2014058136W WO2014157114A1 WO 2014157114 A1 WO2014157114 A1 WO 2014157114A1 JP 2014058136 W JP2014058136 W JP 2014058136W WO 2014157114 A1 WO2014157114 A1 WO 2014157114A1
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- WO
- WIPO (PCT)
- Prior art keywords
- engine
- speed
- condition
- satisfied
- rotation control
- Prior art date
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- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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Images
Classifications
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- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K6/00—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00
- B60K6/20—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs
- B60K6/42—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by the architecture of the hybrid electric vehicle
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
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- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W2540/00—Input parameters relating to occupants
- B60W2540/10—Accelerator pedal position
- B60W2540/103—Accelerator thresholds, e.g. kickdown
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W2540/00—Input parameters relating to occupants
- B60W2540/12—Brake pedal position
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W2540/00—Input parameters relating to occupants
- B60W2540/16—Ratio selector position
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W2710/00—Output or target parameters relating to a particular sub-units
- B60W2710/06—Combustion engines, Gas turbines
- B60W2710/0644—Engine speed
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W2710/00—Output or target parameters relating to a particular sub-units
- B60W2710/08—Electric propulsion units
- B60W2710/081—Speed
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W2710/00—Output or target parameters relating to a particular sub-units
- B60W2710/08—Electric propulsion units
- B60W2710/083—Torque
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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
- F02D2200/00—Input parameters for engine control
- F02D2200/60—Input parameters for engine control said parameters being related to the driver demands or status
- F02D2200/602—Pedal position
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
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- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/62—Hybrid vehicles
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
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- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/64—Electric machine technologies in electromobility
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- 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
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
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- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/7072—Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
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- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/72—Electric energy management in electromobility
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02T90/10—Technologies relating to charging of electric vehicles
- Y02T90/16—Information or communication technologies improving the operation of electric vehicles
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S903/00—Hybrid electric vehicles, HEVS
- Y10S903/902—Prime movers comprising electrical and internal combustion motors
- Y10S903/903—Prime movers comprising electrical and internal combustion motors having energy storing means, e.g. battery, capacitor
- Y10S903/93—Conjoint control of different elements
Definitions
- the present invention relates to an engine rotation control system used for an electrically driven dump truck.
- a drive system for an electrically driven dump truck is known in which the engine is rotated at a medium speed at the same time when the shift lever is moved forward (F) or reverse (R) (see claim 2 of Patent Document 1).
- F forward
- R reverse
- the responsiveness when the accelerator pedal is depressed and the subsequent acceleration are good.
- An object of the present invention is to provide an engine rotation control system capable of saving energy and reducing noise by minimizing the number of engine revolutions when the engine is not required to be raised when responsiveness and acceleration are good when starting and running from a stopped state. Is to provide.
- the present invention includes a shift lever, a brake, an engine, a generator driven by the engine, an electric motor driven by electric power supplied by the generator, and an accelerator. And a controller that controls the engine speed and the torque of the electric motor in accordance with an operation amount of the accelerator pedal, wherein the controller has a condition that a shift position of the shift lever is a forward position or a reverse position. 1, condition 2 that the brake is not operating, condition 3 that the vehicle is stopped, condition 4 that the amount of operation of the accelerator pedal is equal to or less than a predetermined threshold ⁇ , and the engine speed Whether or not the condition 5 is equal to or lower than the medium speed and lower than the minimum speed and lower than the maximum speed.
- a determination unit that determines whether the engine speed of the engine is a minimum speed when the conditions 1 and 2 are satisfied, the condition 3 is not satisfied, and the condition 4 is satisfied. And when the condition 1 is satisfied and the condition 2 is not satisfied, the engine is controlled such that the engine speed of the engine becomes the minimum speed, and the conditions 1 to 3 and the conditions When the condition 5 is satisfied, the engine is controlled so that the engine speed of the engine becomes the medium speed speed, the conditions 1 and 2 are satisfied, the conditions 3 and 4 are not satisfied, and Even when the condition 5 is satisfied, an engine rotation control unit for controlling the engine is provided so that the rotation speed of the engine becomes the medium speed rotation speed.
- the controller further includes an electric motor rotation control unit that controls the electric motor, and when the condition 5 is not satisfied, the engine rotation control unit The engine is controlled such that the engine speed becomes a speed corresponding to the amount of operation of the accelerator pedal, and the electric motor rotation control unit is configured such that the torque of the electric motor corresponds to the engine speed.
- the electric motor is controlled so that
- the controller further includes an electric motor rotation control unit that controls the electric motor, and when the condition 5 is satisfied and the condition 4 is not satisfied, The engine rotation control unit controls the engine so that the rotation number of the engine becomes a rotation number corresponding to an operation amount of the accelerator pedal, and the electric motor rotation control unit controls the torque of the electric motor to be The electric motor is controlled to have a torque according to the engine speed.
- the controller further includes an electric motor rotation control unit that controls the electric motor, the third mode is selected, the condition 1 is satisfied, and the condition is satisfied. 4 does not satisfy the condition, the electric motor rotation control unit causes the torque of the electric motor to become a torque corresponding to the rotation speed of the engine from a state where the rotation speed of the engine becomes the minimum rotation speed. The electric motor is controlled.
- 1 is an overall configuration diagram of an electrically driven dump truck that uses an engine rotation control system according to a first embodiment of the present invention.
- 1 is a configuration diagram of an engine rotation control system according to a first embodiment of the present invention. It is a figure for demonstrating the function of the controller used for the engine rotation control system which is the 1st Embodiment of this invention. It is a flowchart which shows the control content of the controller used for the engine rotation control system which is the 1st Embodiment of this invention. It is a graph which shows the relationship between the engine speed of the engine which the controller used for the engine speed control system which is the 1st Embodiment of this invention controls, and the operation amount of an accelerator pedal (at the time of a stop).
- the engine rotation control system is a system that controls rotation of an engine that drives a generator in an electrically driven dump truck.
- FIG. 1 is an overall configuration diagram of an electrically driven dump truck using an engine rotation control system according to a first embodiment of the present invention.
- the electrically driven dump truck mainly includes an engine 1, a generator 2, a controller 3, and an electric motor 12.
- the controller 3 controls the rotation speed of the engine 1 and the torque of the electric motor 12.
- a generator 2 is connected to the engine 1.
- the generator 2 is driven by the engine 1 to generate electric power (alternating current).
- the generated power is once converted into direct current, then converted into alternating current controlled by an inverter described later, and supplied to the electric motor 12. Thereby, the electric motor 12 is driven and the vehicle moves forward or backward.
- FIG. 2 is a configuration diagram of an engine rotation control system 100A according to the first embodiment of the present invention.
- the solid line arrow indicates an electrical signal, and the broken line arrow indicates a hydraulic pressure signal.
- the engine rotation control system 100A includes an engine 1, a generator 2, a controller 3, a shift lever 4, a service brake pedal 5, a load dump brake switch 6, a rear wheel brake hydraulic pressure sensor 7 (hereinafter referred to as a pressure sensor 7), An electric brake pedal 8, an accelerator pedal 9, a tire 10, an electromagnetic pickup sensor 11, an electric motor 12, an accumulator ACC, an electronic governor 1a, an inverter INV, and a hoist pump 21 are provided.
- the accelerator pedal 9 supplies a signal indicating the operation amount p of the accelerator pedal 9 to the controller 3 in accordance with a user operation.
- the controller 3 controls the rotation of the engine 1 based on the operation amount p of the accelerator pedal 9.
- the shift lever 4 supplies a signal indicating the shift position q of the shift lever 4 to the controller 3 in accordance with a user operation.
- the electric brake pedal 8 is a pedal for operating the electric brake.
- An electric brake is a brake used in normal operation.
- the electric motor 12 functions as a generator. Thereby, the braking force as an electric brake is obtained.
- the rear wheel hydraulic brake is activated. This is because when the vehicle body speed is less than or equal to the extremely low speed, a sufficient braking force cannot be obtained only by the electric brake.
- the electric brake pedal 8 supplies a signal indicating the operation amount s_EB of the electric brake pedal 8 to the controller 3 in accordance with a user operation.
- the controller 3 operates the electric brake based on the operation amount s_EB of the electric brake pedal 8.
- the load dump brake switch 6 is a switch for operating the load dump brake.
- the load dump brake is a brake used when loading and unloading loads. When the load dump brake switch 6 is turned on, the hydraulic brake for the rear wheel is activated.
- the load dump brake switch 6 supplies a signal s_LDB indicating the on / off state of the load dump brake switch 6 to the controller 3. Based on the on / off state of the load dump brake switch 6, the controller 3 operates the solenoid valve EV so that the rear wheel hydraulic brake BC is activated / deactivated.
- the service brake pedal 5 is a pedal for operating the service brake.
- the service brake is used for emergency stop.
- the front and rear hydraulic brakes are activated and the electric brake is activated.
- the service brake valve SBV is operated according to the user's operation, and the oil pressure corresponding to the operation amount s_SB of the service brake pedal 5 is supplied to the hydraulic brake BC of the front wheel and the rear wheel.
- the service brake pedal 5 and the service brake valve SBV are integrally formed.
- the accumulator ACC is connected to the service brake valve SBV and functions as a hydraulic pressure source.
- the pressure sensor 7 detects the brake pressure of the rear wheel and supplies a signal indicating the detected brake pressure r to the controller 3.
- the electromagnetic pickup sensor 11 supplies a signal indicating the rotational speed ⁇ of the tire (wheel) 10 to the controller 3.
- the controller 3 determines whether or not the vehicle body is stopped based on the rotational speed ⁇ of the wheel 10.
- the electronic governor 1a controls the fuel injection amount according to the engine control signal Nc supplied from the controller 3 so that the rotational speed of the engine 1 becomes the target rotational speed Nr corresponding to the operation amount p of the accelerator pedal. To do.
- the inverter INV controls the current of the electric motor 12 according to the electric motor control signal Nr_M supplied from the controller 3 so that the torque of the electric motor 12 becomes a torque corresponding to the target rotational speed Nr of the engine 1.
- the inverter INV may control the current of the electric motor 12 so that the torque of the electric motor 12 becomes a torque corresponding to the actual rotational speed Ne of the engine 1. Further, the inverter INV may control the current of the electric motor 12 so that the torque of the electric motor 12 becomes a torque corresponding to the operation amount p of the accelerator pedal.
- the hoist pump 21 is a pump for supplying pressure oil to a hoist cylinder that moves up and down the vessel.
- the hoist pump 21 is controlled by the controller 3.
- the operating state of the hoist pump 21 is detected by a sensor provided in the hoist pump 21 and supplied to the controller 3.
- FIG. 3 is a diagram for explaining the function of the controller 3 used in the engine rotation control system 100A according to the first embodiment of the present invention.
- the controller 3 includes a vehicle state determination unit 301, an engine rotation control unit 302, and an electric motor control unit 303.
- the vehicle state determination unit 301 determines whether the shift position of the shift lever 4 is forward (F) or reverse (R) based on the shift position q supplied from the shift lever 4.
- the vehicle state determination unit 301 determines whether the service brake is operating based on the rear wheel brake pressure r supplied from the pressure sensor 7.
- the vehicle state determination unit 301 determines whether or not the load dump brake is operating based on the signal s_LDB from the load dump brake switch 6.
- the vehicle state determination unit 301 calculates the vehicle speed from the rotational speed ⁇ of the wheel supplied from the electromagnetic pickup sensor 11. The vehicle state determination unit 301 determines whether or not the vehicle body is stopped based on the calculated vehicle speed. Here, the vehicle state determination unit 301 determines that the vehicle body is stopped (vehicle body stopped state) when the calculated vehicle speed is equal to or lower than a certain speed within the range of 0 km / h to 0.5 km / h.
- the vehicle state determination unit 301 compares the operation amount p of the accelerator pedal 9 with a predetermined minute operation amount ⁇ based on a signal indicating the operation amount p of the accelerator pedal 9 supplied from the accelerator pedal 9.
- the minute operation amount ⁇ is a certain operation amount within a range of 2 to 8% of the maximum operation amount of the accelerator pedal 9.
- the vehicle state determination unit 301 determines whether or not the electric brake is operating based on the operation amount s_EB of the electric brake pedal 8 supplied from the electric brake pedal 8.
- the engine rotation control unit 302 sets the target rotation number Nr of the engine 1 based on the determination result of the vehicle state determination unit 301.
- the engine speed control unit 302 controls the engine 1 so that the engine speed Ne fed back from the engine 1 becomes the target speed Nr.
- the engine rotation control unit 302 supplies an engine control signal Nc to the electronic governor 1a.
- the electronic governor 1a controls the fuel injected into the combustion chamber of the engine 1 based on the engine control signal Nc.
- the electric motor rotation control unit 303 controls the electric motor 12 to have a torque corresponding to the target rotation speed Nr of the engine 1 set by the engine rotation control unit 302. Specifically, the electric motor rotation control unit 303 controls the electric motor 12 so that the torque of the electric motor 12 increases as the target rotation speed Nr of the engine 1 increases.
- the electric motor control unit 303 supplies a motor control signal Nr_M including such a torque command to the inverter INV.
- the inverter INV controls the current supplied to the electric motor 12 based on the motor control signal Nr_M.
- the actual rotation speed Ne_M of the electric motor 12 is fed back to the electric motor rotation control unit 303.
- the electric motor rotation control unit 303 may control the electric motor 12 to have a torque corresponding to the actual rotation speed Ne of the engine 1. Further, the electric motor rotation control unit 303 may control the electric motor 12 so as to have a torque corresponding to the operation amount p of the accelerator pedal.
- the electric motor rotation control unit 303 supplies an electric motor control signal Nr_M including a command for causing the electric motor 12 to function as a generator to the inverter INV based on the operation amount s_EB of the electric brake pedal 8.
- Nr_M an electric motor control signal including a command for causing the electric motor 12 to function as a generator to the inverter INV based on the operation amount s_EB of the electric brake pedal 8.
- the electric power generated at this time is converted into heat by a grid resistance, for example, and released into the atmosphere.
- FIG. 4 is a flowchart showing the control contents of the controller 3 used in the engine rotation control system 100A according to the first embodiment of the present invention.
- the controller 3 (the vehicle state determination unit 301, the engine rotation control unit 302, and the electric motor rotation control unit 303) when the vehicle is started will be described.
- the shift position q is forward (F)
- no brakes are operated
- the vehicle body is stopped.
- the operation amount p of the accelerator pedal is larger than the minute operation amount ⁇ .
- the actual engine speed Ne is the minimum engine speed (idle engine speed).
- the vehicle state determination unit 301 determines whether the shift position q of the shift lever 4 is forward (F) or reverse (R) when the engine is started (step S10). In this example, since the shift position q is forward (F), YES is determined in step S10, and the process proceeds to step S20.
- the vehicle state determination unit 301 determines whether any of the service brake, the load dump brake, and the electric brake is operating (step S20). In this example, since no brake is operating, YES is determined in step S20, and the process proceeds to step S30.
- Vehicle state determination unit 301 determines whether or not the vehicle body is stopped (step S30). In this example, since the vehicle body is stopped, YES is determined in step S30, and the process proceeds to step S35.
- the vehicle state determination unit 301 determines whether or not the actual engine speed Ne is equal to or lower than the medium speed speed (step S35).
- the actual engine speed Ne is initially the minimum engine speed, so YES is determined in step S35, and the process proceeds to step S40.
- the engine rotation control unit 302 sets the engine rotation speed (target rotation speed Nr) of the engine 1 to the medium speed rotation speed (step S40).
- the engine medium speed rotation speed is a certain rotation speed within a range of 900 rpm to 1600 rpm. That is, the medium speed rotational speed is higher than the minimum rotational speed of the engine 1 and lower than the maximum rotational speed.
- the vehicle state determination unit 301 determines whether or not the operation amount p of the accelerator pedal 9 is less than or equal to the minute operation amount ⁇ (step S50). When the operation amount p of the accelerator pedal 9 is equal to or less than the minute operation amount ⁇ (step S50; YES), the vehicle state determination unit 301 repeats step S50.
- step S50 determines that the operation amount p of the accelerator pedal 9 is larger than the minute operation amount ⁇ (step S50; NO)
- the engine rotation control unit 302 determines that the rotation speed of the engine 1 is the operation of the accelerator pedal 9.
- the engine 1 is controlled so as to have a rotational speed corresponding to the amount p (step S60).
- the electric motor rotation control unit 303 controls the electric motor 12 so that the torque of the electric motor 12 becomes a torque corresponding to the rotational speed of the engine 1 (step S60). Thereby, the responsiveness and acceleration at the time of starting and running are improved. Thereafter, the process returns to step S10.
- step S10 since the shift position is forward (F), YES is determined in step S10, and no brakes are operated, so YES is determined in step S20, and the vehicle body is not stopped, and NO is determined in step S30. Obviously, since the shift position is forward (F), YES is determined in step S10, and no brakes are operated, so YES is determined in step S20, and the vehicle body is not stopped, and NO is determined in step S30. Become.
- the vehicle state determination unit 301 determines whether or not the operation amount p of the accelerator pedal 9 is less than or equal to the minute operation amount ⁇ (step S70). In this example, since the operation amount p of the accelerator pedal 9 is smaller than the minute operation amount ⁇ , YES is obtained in step S70.
- the engine rotation control unit 302 sets the engine rotation speed (target rotation speed Nr) to the minimum rotation speed (step S80).
- the engine minimum speed is a certain speed within a range of 600 rpm to 800 rpm.
- the engine speed Ne immediately becomes the minimum speed. Thereby, low fuel consumption and low noise can be achieved. Thereafter, the process returns to step S10.
- step S10 since the shift position q is forward (F), YES is determined in step S10, and NO is determined in step S20 because the electric brake is operating.
- the engine rotation control unit 302 sets the engine rotation speed (target rotation speed Nr) to the minimum rotation speed (step S80). At this time, the engine speed Ne immediately becomes the minimum speed. Thereby, low fuel consumption and low noise can be achieved. Thereafter, the process returns to step S10.
- step S10 since the shift position is forward (F), YES is determined in step S10, and no brakes are operated, so YES is determined in step S20, and the vehicle body is not stopped, and NO is determined in step S30. Become. Further, since the operation amount p of the accelerator pedal 9 is larger than the minute operation amount ⁇ , NO is determined in step S70.
- the vehicle state determination unit 301 determines whether or not the actual engine speed Ne is equal to or lower than the medium speed speed (step S35).
- step S35 When the vehicle state determination unit 301 determines that the actual engine speed Ne is equal to or lower than the medium speed speed (step S35; YES), the engine target speed Nr is set to the medium speed speed (step S40). . Subsequently, since the operation amount p of the accelerator pedal 9 is larger than the minute operation amount ⁇ , YES is obtained in step S50, and torque control of the electric motor 12 is executed (step S60). On the other hand, when the vehicle state determination unit 301 determines that the actual engine revolution speed Ne is greater than the medium speed revolution speed (step S35; NO), torque control of the electric motor 12 is executed (step S60).
- step S10 when the vehicle body is moving and the accelerator pedal 9 is depressed beyond the minute operation amount ⁇ , the engine 1 is first rotated at a medium speed, and then the torque control of the electric motor 12 is executed. Thereby, the responsiveness at the time of driving
- step S35 for example, the state before the actual rotational speed of the engine 1 follows the medium speed rotational speed set in step S40, or the actual rotational speed Ne of the engine 1 due to inertial running is There are cases where it is at the minimum speed.
- the vehicle state determination unit 301 determines whether the shift position q of the shift lever 4 is forward (F) or reverse (R) when the engine is started (step S10). In this example, since the shift position q is neutral (N), NO is determined in step S10, and the process proceeds to step S90.
- the vehicle state determination unit 301 determines whether or not the operation amount p of the accelerator pedal 9 is less than or equal to the minute operation amount ⁇ (step S90).
- step S90 determines that the operation amount p of the accelerator pedal 9 is less than or equal to the minute operation amount ⁇ (step S90; YES)
- the engine rotation control unit 302 determines the engine rotation speed (target rotation speed Nr).
- the minimum number of revolutions is set (step S80). Thereby, low fuel consumption and low noise can be achieved.
- step S90 determines that the operation amount p of the accelerator pedal 9 is larger than the minute operation amount ⁇ (step S90; NO)
- the engine rotation control unit 302 determines that the engine speed is the operation of the accelerator pedal 9.
- the engine 1 is controlled so as to have a rotational speed corresponding to the amount p (step S100).
- the engine rotation control unit 302 controls the engine 1 such that the actual engine speed Ne increases as the operation amount p of the accelerator pedal 9 increases. Thereafter, the process returns to step S10.
- FIG. 5 is a graph showing the relationship between the engine speed (target speed Nr) of the engine 1 and the operation amount p of the accelerator pedal 9 controlled by the engine speed control system 100A according to the first embodiment of the present invention.
- FIG. 5A is a graph in the case where the shift position q of the shift lever 4 is forward (F) or reverse (R), there is no brake operation, and the vehicle body is stopped.
- the vertical axis represents the target rotational speed Nr (rpm)
- the horizontal axis represents the accelerator pedal operation amount p (%).
- the operation amount p (%) indicates a ratio with respect to the maximum operation amount of the accelerator pedal 9.
- the target rotational speed Nr becomes the medium speed rotational speed Nmid. The reason for this is that in FIG.
- step S10 YES in step S10, YES in step S20, YES in step S30, YES in step S35, and the engine speed (target speed Nr) becomes the medium speed speed Nmid in step S40. It is.
- target speed Nr the target rotational speed Nr increases as the operation amount p of the accelerator pedal 9 increases.
- FIG. 5B shows the case where the shift position q of the shift lever 4 is forward (F) or reverse (R), there is no brake operation, and the vehicle body is not stopped.
- the vertical axis represents the target rotational speed Nr (rpm)
- the horizontal axis represents the operation amount p (%) of the accelerator pedal 9. 5B is different from the case of FIG. 5A in that the vehicle body is not stopped, that is, is running.
- the target rotational speed Nr becomes the minimum rotational speed Nmin when 0 ⁇ p ⁇ ⁇ .
- the reason for this is that in FIG. 4, YES in step S10, YES in step S20, NO in step S30, YES in step S70, and the engine speed (target speed Nr) becomes the minimum speed Nmin in step S80. is there.
- p> ⁇ the target rotational speed Nr increases as the operation amount p of the accelerator pedal 9 increases.
- FIG. 6 is a graph showing a time series of the engine speed Ne of the engine 1 controlled by the controller 3 used in the engine speed control system 100A according to the first embodiment of the present invention.
- FIG. 6 (A) is a graph from the time when the electric brake pedal 8 is depressed to the state where the vehicle body is stopped until the accelerator pedal 9 is depressed and the engine speed Ne reaches the target speed.
- the vertical axis indicates the engine speed Ne
- the horizontal axis indicates time t.
- t1 is the timing at which the accelerator pedal 9 is started to be depressed.
- the shift position q of the shift lever 4 is forward (F)
- the brake is not operated, and the vehicle body is stopped.
- the target rotation speed Nr is set to the medium speed rotation speed Nmid.
- the actual engine rotational speed Ne does not immediately become the medium speed rotational speed Nmid.
- the accelerator pedal operation amount p reaches the minute operation amount ⁇ , torque control of the electric motor 12 is started. In FIG. 6A, the point where the torque control of the electric motor 12 is started is circled.
- the accelerator pedal 9 is depressed with a foot, but the operation amount p of the accelerator pedal 9 is less than or equal to the minute operation amount ⁇ .
- t2 is the timing when the operation amount p of the accelerator pedal 9 becomes the minute operation amount ⁇ .
- the operation amount p of the accelerator pedal 9 increases as the time t elapses.
- the shift position q of the shift lever 4 is forward (F)
- the brake is not operating, and the vehicle body is stopped.
- the engine rotational speed Ne becomes the medium speed rotational speed Nmid.
- the accelerator pedal 9 is depressed with a foot, but the operation amount p of the accelerator pedal 9 is not the operation amount A desired by the user.
- t3 is the timing when the operation amount of the accelerator pedal 9 becomes A (> ⁇ ).
- the operation amount p of the accelerator pedal 9 increases as the time t elapses.
- the rotational speed control is performed so that the engine rotational speed Ne becomes the target rotational speed Nr corresponding to the operation amount p of the accelerator pedal 9.
- the engine speed Ne increases as the time t elapses.
- t4 is the timing at which the engine speed Ne reaches the target speed Nr_A corresponding to the operation amount A of the accelerator pedal 9.
- the rotational speed control is performed so that the engine rotational speed Ne becomes the target rotational speed Nr_A corresponding to the operation amount A of the accelerator pedal 9.
- FIG. 6B is a graph showing a time series of the engine speed Ne of the engine 1 of the conventional example (Claim 3 of Patent Document 1).
- the vertical axis represents the engine speed Ne
- the horizontal axis represents time t.
- the shift position q of the shift lever 4 is forward (F), and the operation amount p of the accelerator pedal 9 is less than or equal to the minute operation amount ⁇ . For this reason, the engine speed Ne is the minimum speed Nmin.
- the responsiveness and acceleration when starting from a stop state can be improved.
- the engine rotation control system 100A by using the engine rotation control system 100A according to the first embodiment, a situation where the operation of the accelerator pedal 9 is not required during traveling, such as when the electric drive dump truck is descending, coasting, or decelerating, or In a situation where the vehicle body is stopped by operating either the brake while the shift lever 4 is moving forward (F) or reverse (R), the engine speed can be set to the minimum speed. As a result, energy saving and noise reduction during this period can be realized, leading to a longer engine life. Further, in the case of general driving, the responsiveness and acceleration when starting the vehicle body are not impaired.
- FIG. 7 is a configuration diagram of an engine rotation control system 100B according to the second embodiment of the present invention.
- FIG. 7 the same parts as those in FIG.
- the engine rotation control system 100B shown in FIG. 7 is obtained by adding a travel mode changeover switch 13 (three-position changeover switch 13) to the engine rotation control system 100A shown in FIG.
- the traveling mode switch 13 is a switch for switching the traveling mode.
- the travel mode changeover switch 13 supplies a signal indicating the travel mode s to the controller 3 in accordance with a user operation.
- the travel mode switch 13 is disposed at a position where the driver can easily switch, such as on the front panel or the right console in the cab.
- the first mode is a power mode
- the second mode is an economy mode
- the third mode is a snow mode. In this way, the driving mode can be freely selected by giving an easy-to-understand name to the driver.
- FIG. 8 is a flowchart showing the control contents of the controller 3 used in the engine rotation control system 100B according to the second embodiment of the present invention.
- FIG. 8 the same processes as those in FIG.
- the flowchart shown in FIG. 8 is obtained by adding Step S15 and Step S110 to the flowchart shown in FIG.
- step S15 the vehicle state determination unit 301 determines whether the travel mode s supplied from the travel mode switch 13 is the power mode, the eco mode, or the snow mode.
- step S15 when the vehicle state determination unit 301 determines that the travel mode s is the power mode, the engine rotation control unit 302 advances the process to step S35. Subsequently, similarly to the first embodiment, the processes in steps S35 to S60 are executed, and the process returns to step S10.
- step S15 determines in step S15 that the travel mode s is the economy mode
- step S20 the process from step S20 is executed as in the first embodiment, and the process proceeds to step S10. Return.
- step S15 when the vehicle state determination unit 301 determines that the travel mode s is the snow mode, the engine rotation control unit 302 advances the process to step S110.
- the vehicle state determination unit 301 determines whether or not the operation amount p of the accelerator pedal 9 is less than or equal to the minute operation amount ⁇ (step S110).
- step S110 determines that the operation amount p of the accelerator pedal 9 is less than or equal to the minute operation amount ⁇ (step S110; YES)
- the engine rotation control unit 302 determines the engine speed (target speed Nr). The minimum number of revolutions is set (step S80).
- step S110 when the vehicle state determination unit 301 determines that the operation amount p of the accelerator pedal 9 is larger than the minute operation amount ⁇ (step S110; NO), torque control of the electric motor 12 is executed (step S60). That is, the electric motor rotation control unit 303 controls the electric motor 12 so that the torque of the electric motor 12 becomes a torque according to the engine rotation speed from the state where the rotation speed of the engine 1 becomes the minimum rotation speed. Thereafter, the process returns to step S10.
- the second embodiment it is possible to cope with an optimum state in accordance with the operating state of the electrically driven dump truck. For example, when the vehicle starts on a slippery road surface due to snowfall or the like, good responsiveness and acceleration may lead to vehicle slip, which can be prevented if the snow mode is selected in advance. Further, if there is a situation where it is desired to further improve the responsiveness and acceleration from the vehicle running state, this can be dealt with if the power mode is selected in advance.
- the present invention is not limited to the above-described embodiments, and includes various modifications.
- the above-described embodiments have been described in detail for easy understanding of the present invention, and are not necessarily limited to those having all the configurations described.
- a part of the configuration of one embodiment can be replaced with the configuration of another embodiment, and the configuration of another embodiment can be added to the configuration of one embodiment. It is possible to add, delete, and replace other configurations for a part of the configuration of each embodiment.
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Abstract
Description
以下、図1~図6を用いて本発明の第1の実施形態であるエンジン回転制御システムの構成及び動作を説明する。エンジン回転制御システムは、電気駆動式ダンプトラックにおいて、発電機を駆動するエンジンの回転を制御するシステムである。
まず、車両の発進時における、コントローラ3(車両状態判断部301、エンジン回転制御部302、電動モータ回転制御部303)の動作を説明する。この場合、シフト位置qは前進(F)であり、いずれのブレーキも作動しておらず、かつ、車体は停止している。また、アクセルペダルの操作量pは微小操作量δより大きい。また、当初、エンジン実回転数Neは最小回転数(アイドル回転数)となっている。
次に、惰性走行時における、コントローラ3(車両状態判断部301、エンジン回転制御部302)の動作を説明する。この場合、シフト位置は前進(F)であり、いずれのブレーキも作動しておらず、かつ、車体は停止していない。また、アクセルペダル9の操作量pは微小操作量δより小さい。アクセルペダル9の微小操作量δを設定しているのは、運転者がブレーキを操作している以外、いかなる状況の運転であっても、常にアクセルペダル9に足を軽く乗せて運転することがあるためである。
次に、減速時における、コントローラ3(車両状態判断部301、エンジン回転制御部302)の動作を説明する。この場合、シフト位置qは前進(F)であり、電気ブレーキが作動しており、かつ、車体は停止していない。また、アクセルペダルの操作量pは0である。
降坂時は、惰性走行と減速の組み合わせとなる。この場合、上記(2)及び(3)で説明したように、エンジン回転数Neは最小回転数になる。これにより、低燃費、低騒音を達成することができる。
この場合、シフト位置qは前進(F)であり、いずれのブレーキも作動しておらず、かつ、車体は停止していない。また、アクセルペダルの操作量pは微小操作量δより大きい。
放土のためベッセルを昇降する場合、ユーザは、アクセルペダルを踏み込んで、エンジン回転数を上げる。エンジン1に直結されているホイスト用ポンプ21の回転数を上げ、ホイストシリンダに供給される作動油の油圧を高くするためである。このとき、シフトレバー4のシフト位置qは中立(N)である。
次に、図7~図8を用いて、本発明の第2の実施形態であるエンジン回転制御システムの構成及び動作を説明する。
2…発電機
3…コントローラ
4…シフトレバー
5…サービスブレーキペダル
6…ロードダンプブレーキスイッチ
7…後輪ブレーキ用油圧圧力センサ(圧力センサ)
8…電気ブレーキペダル
9…アクセルペダル
10…タイヤ
11…電磁ピックアップセンサ
12…電動モータ
13…3位置切替スイッチ(走行モード切替スイッチ)
1a…電子ガバナ
INV…インバータ
21…ホイスト用ポンプ
Claims (5)
- シフトレバーと、ブレーキと、エンジンと、前記エンジンによって駆動される発電機と、前記発電機が供給する電力によって駆動する電動モータと、アクセルペダルと、前記アクセルペダルの操作量に応じて前記エンジンの回転数及び前記電動モータのトルクを制御するコントローラを備え、
前記コントローラは、
前記シフトレバーのシフト位置が前進位置又は後進位置であるという条件1と、
前記ブレーキが作動していないという条件2と、
車両が停止しているという条件3と、
前記アクセルペダルの操作量が所定の閾値δ以下であるという条件4と、
前記エンジンの回転数が最小回転数より高く最大回転数より低い中速回転数以下であるという条件5と、
をそれぞれ満たしているか否かを判断する判断部と、
前記条件1及び2を満たし、前記条件3を満たさず、かつ、前記条件4を満たしている場合に、前記エンジンのエンジン回転数が最小回転数となるように前記エンジンを制御し、
前記条件1を満たし、かつ、前記条件2を満していない場合も、前記エンジンのエンジン回転数が前記最小回転数となるように前記エンジンを制御し、
前記条件1~3及び前記条件5を満たしている場合、前記エンジンのエンジン回転数が前記中速回転数となるように前記エンジンを制御し、
前記条件1及び2を満たし、前記条件3及び前記条件4を満たさず、かつ、前記条件5を満たしている場合も、前記エンジンの回転数が前記中速回転数となるように前記エンジンを制御するエンジン回転制御部を有する
ことを特徴とするエンジン回転制御システム。 - 請求項1に記載のエンジン回転制御システムであって、
前記コントローラは、
前記電動モータを制御する電動モータ回転制御部をさらに有し、
前記条件5を満たしていない場合に、
前記エンジン回転制御部は、
前記エンジンの回転数が前記アクセルペダルの操作量に応じた回転数になるように前記エンジンを制御するとともに、
前記電動モータ回転制御部は、
前記電動モータのトルクが前記エンジンの回転数に応じたトルクになるように前記電動モータを制御する
ことを特徴とするエンジン回転制御システム。 - 請求項1に記載のエンジン回転制御システムであって、
前記コントローラは、
前記電動モータを制御する電動モータ回転制御部をさらに有し、
前記条件5を満たし、かつ、前記条件4を満たしていない場合に、
前記エンジン回転制御部は、
前記エンジンの回転数が前記アクセルペダルの操作量に応じた回転数になるように前記エンジンを制御するともに、
前記電動モータ回転制御部は、
前記電動モータのトルクが前記エンジンの回転数に応じたトルクになるように前記電動モータを制御する
ことを特徴とするエンジン回転制御システム。 - 請求項1に記載のエンジン回転制御システムであって、
第1モード、第2モード又は第3モードのいずれかに切替える切替スイッチをさらに備え、
前記エンジン回転制御部は、
前記第1モードが選択され、かつ、前記条件1及び前記条件5を満たしている場合に前記エンジンのエンジン回転数が前記中速回転数となるように前記エンジンを制御し、
前記第2モードが選択され、かつ、前記条件1~3及び前記条件5を満たしている場合に、前記エンジンのエンジン回転数が前記中速回転数となるように前記エンジンを制御し、
前記第2モードが選択され、前記条件1及び前記条件2を満たし、前記条件3及び前記条件4を満たさず、かつ、前記条件5を満たす場合、前記エンジンのエンジン回転数が前記中速回転数となるように前記エンジンを制御し、
前記第3モードが選択され、かつ、前記条件1及び前記4を満たしている場合に、前記エンジンのエンジン回転数が前記最小回転数となるように前記エンジンを制御し、
前記第2モードが選択され、前記条件1及び前記条件2を満たし、前記条件3を満たさず、かつ、前記条件4を満たす場合、前記エンジンのエンジン回転数が前記最小回転数となるように前記エンジンを制御し、
前記第2モードが選択され、前記条件1を満たし、かつ、前記条件2を満していない場合、前記エンジンのエンジン回転数が前記最小回転数となるように前記エンジンを制御する
ことを特徴とするエンジン回転制御システム。 - 請求項4に記載のエンジン回転制御システムであって、
前記コントローラは、
前記電動モータを制御する電動モータ回転制御部をさらに有し、
前記第3モードが選択され、前記条件1を満たし、かつ、前記条件4を満たしていない場合に、
前記電動モータ回転制御部は、
前記エンジンの回転数が最小回転数となった状態から、前記電動モータのトルクが前記エンジンの回転数に応じたトルクになるように前記電動モータを制御する
ことを特徴とするエンジン回転制御システム。
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EP14772763.0A EP2979944B1 (en) | 2013-03-29 | 2014-03-24 | Engine rotation control system |
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