WO2013088526A1 - 内燃機関の停止制御装置 - Google Patents
内燃機関の停止制御装置 Download PDFInfo
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- WO2013088526A1 WO2013088526A1 PCT/JP2011/078914 JP2011078914W WO2013088526A1 WO 2013088526 A1 WO2013088526 A1 WO 2013088526A1 JP 2011078914 W JP2011078914 W JP 2011078914W WO 2013088526 A1 WO2013088526 A1 WO 2013088526A1
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- WIPO (PCT)
- Prior art keywords
- internal combustion
- combustion engine
- stop control
- crank angle
- motor
- Prior art date
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W20/00—Control systems specially adapted for hybrid vehicles
- B60W20/40—Controlling the engagement or disengagement of prime movers, e.g. for transition between prime movers
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K6/00—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00
- B60K6/20—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs
- B60K6/42—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by the architecture of the hybrid electric vehicle
- B60K6/44—Series-parallel type
- B60K6/445—Differential gearing distribution type
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W10/00—Conjoint control of vehicle sub-units of different type or different function
- B60W10/04—Conjoint control of vehicle sub-units of different type or different function including control of propulsion units
- B60W10/06—Conjoint control of vehicle sub-units of different type or different function including control of propulsion units including control of combustion engines
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W10/00—Conjoint control of vehicle sub-units of different type or different function
- B60W10/04—Conjoint control of vehicle sub-units of different type or different function including control of propulsion units
- B60W10/08—Conjoint control of vehicle sub-units of different type or different function including control of propulsion units including control of electric propulsion units, e.g. motors or generators
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D17/00—Controlling engines by cutting out individual cylinders; Rendering engines inoperative or idling
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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
- F02N11/08—Circuits or control means specially adapted for starting of engines
- F02N11/0814—Circuits or control means specially adapted for starting of engines comprising means for controlling automatic idle-start-stop
- F02N11/0818—Conditions for starting or stopping the engine or for deactivating the idle-start-stop mode
- F02N11/0833—Vehicle conditions
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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
- B60W2510/0685—Engine crank angle
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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
- B60W2710/0605—Throttle 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
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/62—Hybrid vehicles
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S903/00—Hybrid electric vehicles, HEVS
- Y10S903/902—Prime movers comprising electrical and internal combustion motors
- Y10S903/903—Prime movers comprising electrical and internal combustion motors having energy storing means, e.g. battery, capacitor
- Y10S903/93—Conjoint control of different elements
Definitions
- the present invention relates to a technical field of a stop control device for an internal combustion engine that controls a stop operation of an internal combustion engine mounted on a vehicle such as an automobile.
- Patent Document 1 proposes a technique for reducing variation in crank angle at the time of stopping by increasing the throttle opening in the intake stroke immediately before the stop of the internal combustion engine and increasing the compression pressure in the compression stroke.
- Patent Document 2 proposes a technique for determining the throttle opening in the stop control according to the crank angle when the rotational speed of the internal combustion engine reaches a predetermined value.
- Patent Document 3 proposes a technique for determining the throttle opening in the stop control according to the intake air density of the internal combustion engine.
- the present invention has been made in view of the above-described problems, and it is an object of the present invention to provide a stop control device for an internal combustion engine capable of suitably controlling a crank angle at the time of stop even in an internal combustion engine having three cylinders or less.
- an internal combustion engine stop control device is an internal combustion engine stop control device that controls the operation of an internal combustion engine having three or less cylinders when the internal combustion engine stops.
- a motor capable of outputting torque, a rotational speed detection means for detecting the rotational speed of the internal combustion engine, a crank angle detection means for detecting the crank angle of the crankshaft of the internal combustion engine, and when the internal combustion engine is stopped.
- a motor control means for controlling the motor so as to output an adjustment torque for adjusting a crank angle at a time when the internal combustion engine is stopped to a desired value, and a throttle in an intake stroke immediately before the internal combustion engine is stopped.
- Throttle valve control means for controlling the opening of the valve to be a predetermined opening, a crank angle when the rotational speed of the internal combustion engine reaches a predetermined value, and the predetermined opening And an adjusting torque determining means for determining the adjustment torque based on.
- the stop control device for an internal combustion engine according to the present invention controls the operation of an internal combustion engine having three cylinders or less when stopped.
- the internal combustion engine according to the present invention is configured, for example, as a power element capable of supplying power to a drive shaft of a vehicle.
- the fuel type, the fuel supply mode, the fuel combustion mode, the intake / exhaust system configuration, and the cylinder arrangement Various aspects regardless of the above may be adopted.
- the stop control device for an internal combustion engine according to the present invention includes a motor capable of outputting torque to the crankshaft of the internal combustion engine.
- the motor is configured as a motor generator such as a motor generator mounted on a hybrid vehicle, for example.
- the stop control device for an internal combustion engine according to the present invention further includes a rotation speed detection means for detecting the rotation speed of the internal combustion engine and a crank angle detection means for detecting the crank angle of the crankshaft of the internal combustion engine.
- the stop control device for an internal combustion engine for example, when the rotational speed of the internal combustion engine detected by the rotational speed detection means falls below a predetermined threshold, the stop control of the internal combustion engine is started.
- a reduction torque for reducing the rotational speed of the internal combustion engine is output from the motor.
- the rotational speed of the internal combustion engine is gradually reduced and eventually stops.
- the motor is controlled by the motor control means so as to output an adjustment torque for setting the crank angle when the internal combustion engine is stopped to a desired value.
- the motor outputs the above-described reduction torque
- the sum of the reduction torque and the adjustment torque is output from the motor.
- the throttle valve control means controls the opening of the throttle valve in the intake stroke immediately before the internal combustion engine is stopped to be a predetermined opening.
- the intake negative pressure of the intake manifold in the intake stroke is reduced.
- the “predetermined opening” here is determined and set theoretically, experimentally, or empirically in advance as a value that can reduce the intake negative pressure.
- the above-described adjustment torque is determined based on the crank angle and the predetermined opening of the throttle valve when the rotational speed of the internal combustion engine reaches a predetermined value.
- the crank angle at the time of stop can be suitably controlled even in an internal combustion engine having three cylinders or less.
- the predetermined opening is set as a value that can reduce the intake negative pressure to zero in the intake stroke immediately before the internal combustion engine stops.
- the intake negative pressure of the intake manifold is reduced to zero. Note that “zero” here does not only mean that the negative intake pressure is completely zero, but also a broad concept including the meaning that it is small enough to eliminate the negative effects of the negative intake pressure described above. It is.
- the crank angle control at the time of stopping can be performed more preferably.
- the predetermined opening is fully open.
- the opening degree of the throttle valve in the intake stroke immediately before the internal combustion engine is stopped is controlled to be fully opened.
- the crank angle can be reliably stopped at a desired value by fully opening the throttle valve, for example, regardless of the engine specifications. Therefore, in this aspect, the crank angle control at the time of stopping can be performed more preferably.
- the stop control device for an internal combustion engine of the present invention it is provided with motor rotation speed detection means for detecting the rotation speed of the motor, and the adjustment torque determination means The adjustment torque is increased as the rotational speed is increased, and the adjustment torque is decreased as the rotational speed of the motor is decreased.
- the rotational speed of the motor is detected by the motor rotational speed detection means.
- the adjustment torque is increased as the rotation speed of the motor at the start of the stop control of the internal combustion engine is increased, and the adjustment torque is decreased as the rotation speed of the motor is decreased.
- the adjustment torque determining means is for stopping when the shift of the transmission connected to the crankshaft of the internal combustion engine is in the traveling D range.
- the adjustment torque is made smaller than in the case of the P range.
- the rotational speed of the motor is indirectly determined depending on whether the shift of the transmission is in the D (drive) range for traveling or the P (parking) range for stopping. Specifically, in the case of the D range, it is determined that the motor rotation number is smaller than that in the case of the P range.
- 1 is a schematic configuration diagram conceptually showing a configuration of a hybrid vehicle.
- 1 is a schematic configuration diagram conceptually showing a configuration of a hybrid drive device.
- It is a schematic block diagram which shows the structure of an engine.
- It is a block diagram which shows the structure of ECU.
- It is a flowchart which shows operation
- It is a chart figure showing change of various parameters at the time of operation of a stop control device of an internal-combustion engine concerning a 1st embodiment.
- It is a map for calculating an adjustment torque from a crank angle. It is a graph which shows the relationship between the crank angle at the time of 500 rpm, and the crank angle at the time of a stop.
- FIG. 1 is a schematic configuration diagram conceptually showing the configuration of the hybrid vehicle.
- a hybrid vehicle 1 includes a hybrid drive device 10, a PCU (Power Control Unit) 11, a battery 12, an accelerator opening sensor 13, a vehicle speed sensor 14, and an ECU 100.
- PCU Power Control Unit
- the ECU 100 is an electronic control unit that includes a CPU (Central Processing Unit), a ROM (Read Only Memory), a RAM (Random Access Memory), and the like, and is capable of controlling the operation of each part of the hybrid vehicle 1.
- the ECU 100 is configured to execute various controls in the hybrid vehicle 1 according to a control program stored in, for example, a ROM.
- the PCU 11 converts the DC power extracted from the battery 12 into AC power and supplies it to a motor generator MG1 and a motor generator MG2 described later. Further, an inverter (not shown) that can convert AC power generated by motor generator MG1 and motor generator MG2 into DC power and supply it to battery 12 is included. That is, the PCU 11 inputs / outputs power between the battery 12 and each motor generator, or inputs / outputs power between the motor generators (that is, in this case, the power between the motor generators without passing through the battery 12).
- the power control unit is configured to be controllable.
- the PCU 11 is electrically connected to the ECU 100, and its operation is controlled by the ECU 100.
- the battery 12 is a rechargeable power storage unit that functions as a power supply source related to power for powering the motor generator MG1 and the motor generator MG2.
- the amount of power stored in the battery 12 can be detected by the ECU 100 or the like.
- the accelerator opening sensor 13 is a sensor configured to be able to detect an accelerator opening Ta that is an operation amount of an accelerator pedal (not shown) of the hybrid vehicle 1.
- the accelerator opening sensor 13 is electrically connected to the ECU 100, and the detected accelerator opening Ta is referred to by the ECU 100 at a constant or indefinite period.
- the vehicle speed sensor 14 is a sensor configured to be able to detect the vehicle speed V of the hybrid vehicle 1.
- the vehicle speed sensor 14 is electrically connected to the ECU 100, and the detected vehicle speed V is referred to by the ECU 100 at a constant or indefinite period.
- the hybrid drive device 10 is a power unit that functions as a power train of the hybrid vehicle 1.
- FIG. 2 is a schematic configuration diagram conceptually showing the configuration of the hybrid drive apparatus.
- the hybrid drive apparatus 10 mainly includes an engine 200, a power split mechanism 300, a motor generator MG1 (hereinafter appropriately referred to as “MG1”), a motor generator MG2 (hereinafter appropriately referred to as “MG2”), An input shaft 400, a drive shaft 500, and a speed reduction mechanism 600 are provided.
- MG1 motor generator MG1
- MG2 motor generator MG2
- An input shaft 400, a drive shaft 500, and a speed reduction mechanism 600 are provided.
- the engine 200 is a gasoline engine that is an example of the “internal combustion engine” according to the present invention, and is configured to function as a main power source of the hybrid vehicle 1.
- FIG. 3 is a schematic view illustrating one cross-sectional configuration of the engine.
- the “internal combustion engine” in the present invention has three or less cylinders and is generated when an air-fuel mixture containing various fuels such as gasoline, light oil or alcohol burns in a combustion chamber inside the cylinder.
- This is a concept encompassing an engine configured to be able to extract a force as a driving force through an appropriate physical or mechanical transmission means such as a piston, a connecting rod and a crankshaft.
- the configuration of the internal combustion engine according to the present invention is not limited to that of the engine 200 and may have various aspects.
- the engine can be temporarily driven as an engine of three or less cylinders by cylinder deactivation or the like, and is driven as an engine of three or less cylinders during stop control described later. If there is, it is included in the internal combustion engine in the present invention.
- the engine 200 is an engine in which a plurality of cylinders 201 are arranged in series in a direction perpendicular to the paper surface.
- the configurations of the individual cylinders 201 are equal to each other, only one cylinder 201 is shown in FIG. I will explain.
- the engine 200 burns the air-fuel mixture through an ignition operation by an ignition device 202 in which a part of a spark plug (not shown) is exposed in a combustion chamber in a cylinder 201, and the explosive force due to such combustion.
- the reciprocating motion of the piston 203 that occurs in response to the above is converted into the rotational motion of the crankshaft 205 via the connecting rod 204.
- crank position sensor 206 that detects the rotational position (ie, crank angle) of the crankshaft 205 is installed.
- the crank position sensor 206 is electrically connected to the ECU 100 (not shown), and the ECU 100 calculates the engine speed NE of the engine 200 based on the crank angle signal output from the crank position sensor 206. It is the composition which becomes.
- the air sucked from the outside passes through the intake pipe 207 and is guided into the cylinder 201 through the intake port 210 when the intake valve 211 is opened.
- the fuel injection valve of the injector 212 is exposed at the intake port 210, so that fuel can be injected into the intake port 210.
- the fuel injected from the injector 212 is mixed with the intake air before and after the opening timing of the intake valve 211 to become the above-described mixture.
- Fuel is stored in a fuel tank (not shown), and is supplied to the injector 212 via a delivery pipe (not shown) by the action of a feed pump (not shown).
- the air-fuel mixture combusted inside the cylinder 201 becomes exhaust, and is led to the exhaust pipe 215 via the exhaust port 214 when the exhaust valve 213 that opens and closes in conjunction with the opening and closing of the intake valve 211 is opened.
- a throttle valve 208 capable of adjusting the intake air amount related to the intake air guided through a cleaner (not shown) is disposed.
- the throttle valve 208 is an example of the “throttle valve” in the present invention, and the driving state thereof is controlled by a throttle valve motor 209 electrically connected to the ECU 100.
- the ECU 100 basically controls the throttle valve motor 209 so as to obtain a throttle opening corresponding to the opening of an accelerator pedal (not shown) (that is, the accelerator opening Ta described above). It is also possible to adjust the throttle opening without intervention of the driver's intention through the operation control of 209. That is, the throttle valve 208 is configured as a kind of electronically controlled throttle valve.
- a three-way catalyst 216 is installed in the exhaust pipe 215.
- the three-way catalyst 216 is configured to reduce NOx (nitrogen oxides) in the exhaust discharged from the engine 200 and at the same time to oxidize CO (carbon monoxide) and HC (hydrocarbon) in the exhaust. It is.
- NOx nitrogen oxides
- CO carbon monoxide
- HC hydrocarbon
- the form which a catalyst apparatus can take is not limited to such a three-way catalyst,
- various catalysts such as an NSR catalyst (NOx storage reduction catalyst) or an oxidation catalyst are installed. May be.
- the exhaust pipe 215 is provided with an air-fuel ratio sensor 217 configured to be able to detect the exhaust air-fuel ratio of the engine 200. Further, a water temperature sensor 218 for detecting the cooling water temperature related to the cooling water (LLC) circulated and supplied to cool the engine 200 is disposed in the water jacket installed in the cylinder block that houses the cylinder 201. ing.
- the air-fuel ratio sensor 217 and the water temperature sensor 218 are electrically connected to the ECU 100, and the detected air-fuel ratio and cooling water temperature are grasped by the ECU 100 at a constant or indefinite detection cycle. .
- the motor generator MG1 is an example of the “motor” of the present invention, and includes a power running function that converts electrical energy into kinetic energy and a motor generator that has a regenerative function that converts kinetic energy into electrical energy. It is.
- motor generator MG2 is a motor generator having a power running function that converts electrical energy into kinetic energy and a regeneration function that converts kinetic energy into electrical energy.
- Motor generators MG1 and MG2 are configured as, for example, synchronous motor generators, and include, for example, a rotor having a plurality of permanent magnets on an outer peripheral surface, and a stator wound with a three-phase coil that forms a rotating magnetic field. However, it may have other configurations.
- Power split device 300 is arranged between sun gear S1 provided in the center, ring gear R1 provided concentrically on the outer periphery of sun gear S1, and between sun gear S1 and ring gear R1, and rotates on the outer periphery of sun gear S1.
- a plurality of pinion gears P1 that revolve while revolving, and a carrier C1 that supports the rotation shaft of each pinion gear are provided.
- the sun gear S1 is connected to the rotor RT1 of the MG1 via the sun gear shaft 310, and the rotation speed thereof is equivalent to the rotation speed Nmg1 of the MG1 (hereinafter referred to as “MG1 rotation speed Nmg1” as appropriate).
- the ring gear R1 is coupled to the rotor RT2 of the MG2 via the clutch 710, the drive shaft 500, and the speed reduction mechanism 600, and the rotational speed thereof is referred to as MG2 rotational speed Nmg2 (hereinafter referred to as “MG2 rotational speed Nmg2” as appropriate).
- the carrier C1 is connected to the input shaft 400 connected to the crankshaft 205 described above of the engine 200, and the rotational speed thereof is equivalent to the engine rotational speed NE of the engine 200.
- the MG1 rotation speed Nmg1 and the MG2 rotation speed Nmg2 are detected by a rotation sensor such as a resolver at a constant cycle, and are sent to the ECU 100 at a constant or indefinite cycle.
- the drive shaft 500 passes through drive shafts SFR and SFL for driving the right front wheel FR and the left front wheel FL, which are drive wheels of the hybrid vehicle 1, respectively, and a reduction mechanism 600 as a reduction device including various reduction gears and differential gears.
- a reduction mechanism 600 as a reduction device including various reduction gears and differential gears.
- the motor torque Tmg2 supplied from the motor generator MG2 to the drive shaft 500 is transmitted to each drive shaft via the speed reduction mechanism 600, and the drive force transmitted from each drive wheel via each drive shaft is Similarly, it is input to motor generator MG2 via reduction mechanism 600 and drive shaft 500. Therefore, the MG2 rotational speed Nmg2 is uniquely related to the vehicle speed V of the hybrid vehicle 1.
- the power split mechanism 300 supplies the engine torque Te supplied from the engine 200 to the input shaft 400 via the crankshaft 205 to the sun gear S1 and the ring gear R1 by a predetermined ratio (by the carrier C1 and the pinion gear P1).
- the power of the engine 200 can be divided into two systems.
- FIG. 4 is a block diagram showing the configuration of the ECU.
- the ECU 100 includes an engine speed detection unit 110, a crank angle detection unit 120, an engine stop control determination unit 130, an MG torque calculation unit 140, an MG torque control unit 150, and a throttle. And a control unit 160.
- the engine speed detection unit 110 is an example of the “rotation speed detection unit” of the present invention.
- the engine speed NE is determined based on the crank angle information obtained from the crank position sensor 206 (see FIG. 3). To detect.
- the engine speed NE detected by the engine speed detection unit 110 is output to the engine stop control determination unit 130.
- the crank angle detection unit 120 is an example of the “crank angle detection means” of the present invention, and detects the crank angle of the crankshaft 205 based on the crank angle information obtained from the crank position sensor 206, for example.
- the crank angle detected by the crank angle detection unit 120 is output to the MG torque calculation unit 140.
- Engine stop control determination unit 130 performs various determinations in engine 200 stop control based on engine speed NE detected by engine speed detection unit 110.
- the engine stop control determination unit 130 has, for example, at least one threshold for the engine speed NE for performing engine stop control, and determines whether the detected engine speed NE exceeds the threshold. It is determined whether or not various controls are performed.
- the engine stop control determination unit 130 controls the MG torque calculation 140 and the throttle control unit 160, respectively.
- the MG torque calculation unit 140 is an example of the “adjustment torque determination unit” according to the present invention, and determines the torque to be output from the MG1.
- the MG torque calculation unit 140 calculates a reduction torque for reducing the rotation speed of the engine 200 and an adjustment torque for adjusting the position of the crank angle in the engine stop control. In particular, the adjustment torque described above is calculated using the crank angle obtained from the crank angle detection unit 120.
- the MG torque calculator 140 stores a map for deriving the adjustment torque from the crank angle, for example.
- the value calculated by MG torque calculation unit 140 is output to MG torque control unit 150.
- the MG torque control unit 150 is an example of the “motor control means” of the present invention, and controls the motor generator MG1 so as to output the torque calculated by the MG torque calculation unit 140.
- the throttle control unit 160 is an example of the “throttle valve control means” in the present invention, and controls the opening degree of the throttle valve 208 by driving the throttle valve motor 209 (see FIG. 3).
- the throttle control unit 160 according to the present embodiment sets the throttle valve 208 to a predetermined opening that is set in advance during engine stop control. The operation during the engine stop control will be described in detail later.
- the ECU 100 configured to include each part described above is an electronic control unit configured integrally, and all the operations related to the above parts are configured to be executed by the ECU 100.
- the physical, mechanical, and electrical configurations of the above-described parts according to the present invention are not limited thereto.
- each of these parts includes various ECUs, various processing units, various controllers, microcomputer devices, and the like. It may be configured as a computer system or the like.
- FIG. 5 is a flowchart showing the operation of the stop control device for the internal combustion engine according to the first embodiment.
- FIG. 6 is a chart showing changes in various parameters during the operation of the stop control device for the internal combustion engine according to the first embodiment.
- the engine speed NE 110 detects the engine speed NE of the engine 200 (step S101).
- the engine stop control determination unit 130 determines whether or not the detected value is 1200 rpm or less (step S102).
- the value of 1200 rpm here is a threshold value for determining whether or not to start the engine stop control, and is stored in advance in the engine stop control determination unit 130.
- step S102 When it is determined that the detected value is 1200 rpm or less (step S102: YES), the MG torque calculation unit 140 calculates the reduction torque to be output from MG1, and the MG torque control unit 150 calculates the reduction MG1 is controlled to output torque (step S103).
- the engine speed detector 110 detects the engine speed NE of the engine 200 again (step S104).
- the engine stop control determination unit 130 determines whether or not the detected value is 1000 rpm or less (step S105).
- the value 1000 rpm here is a threshold value for determining whether or not to start output of the adjustment torque for adjusting the crank angle, and is stored in advance in the engine stop control determination unit 130.
- step S105 If it is determined that the detected value is 1000 rpm or less (step S105: YES), the crank angle detection unit 120 first detects the crank angle value at that time (step S106). Based on the detected crank angle value, the MG torque calculating unit 140 calculates the adjustment torque to be output from MG1 (step S107).
- FIG. 7 is a map for calculating the adjustment torque from the crank angle.
- the map in FIG. 7 shows the torque value for controlling the crank angle after the engine stops to about 120 deg to 150 deg, which is just before the top dead center.
- the value of the adjustment torque to be output can be uniquely determined from the crank angle value when the engine speed NE of the engine 200 is 1000 rpm.
- Such a map can be created, for example, by repeating tests under different conditions such as what torque is output and the crank angle after the engine is stopped at a desired position.
- the MG torque control unit 150 controls the MG 1 to output the calculated adjustment torque (step S108). As shown by the shaded portion in FIG. 6, the adjustment torque is output in addition to the pulling torque that has been output so far.
- the engine speed detector 110 detects the engine speed NE of the engine 200 again (step S109).
- the engine stop control determination unit 130 determines whether or not the detected value is 500 rpm or less (step S110).
- the value of 500 rpm is a threshold value for determining whether or not the opening of the throttle valve 208 is fully opened, and is stored in advance in the engine stop control determination unit 130.
- the threshold value here a value close to the resonance band of the damper (for example, 350 rpm)
- the threshold value for fully opening the throttle valve 208 is the damper resonance band
- the damper resonance band can be passed through the intake stroke immediately before the engine stops, so that the drive noise can be effectively suppressed.
- step S110: YES the throttle controller 160 drives the throttle valve motor 209, and the throttle valve 208 is fully opened.
- the opening of the throttle valve 208 is fully opened, the intake negative pressure of the intake manifold is reduced and approaches the atmospheric pressure. Thereby, the brake effect of the piston 203 due to the negative pressure in the intake stroke is reduced, and the brake effect in one compression stroke is increased. Therefore, it becomes easy to stop the crank angle immediately before the top dead center.
- the throttle valve 208 is described as being fully open, but it is not always necessary to open the throttle valve 208 as long as it has a value that can eliminate the negative effects of intake negative pressure in the intake stroke described above. Good.
- FIG. 8 is a graph showing the relationship between the crank angle at 500 rpm and the crank angle at the stop. Note that the comparative example shown in FIG. 8 shows a result of the engine stop control according to the present embodiment in which only the control for fully opening the throttle valve 208 is performed and the adjustment torque is not output.
- the crank angle when the engine 200 is stopped is the target value when the crank angle when the engine speed NE is 500 rpm is around ⁇ 30 deg to 90 deg. (Ie, 120 deg to 150 deg).
- the crank angle when the engine 200 is stopped falls within the target value in almost all cases regardless of the crank angle when the engine speed NE is 500 rpm.
- the engine 200 is a multi-cylinder engine having four or more cylinders, any one of the cylinders is always in the intake stroke, so even if the adjustment torque is not output, the braking effect by the intake negative pressure is constant.
- the crank angle is easy to control.
- the engine stop control according to the present embodiment for adjusting the opening of the throttle valve 208 after outputting the adjustment torque is extremely effective.
- the stop control device for an internal combustion engine according to the first embodiment, it is possible to suitably perform crank angle control when the engine is stopped.
- FIG. 9 is a flowchart showing the operation of the stop control device for the internal combustion engine according to the second embodiment. Note that the second embodiment differs from the first embodiment described above only in part of the operation, and other basic operations are substantially the same. For this reason, in FIG. 9, a part of the process shown in FIG. 5 is omitted as appropriate, and only the process different from the first embodiment is illustrated.
- step S201 when the engine stop control is started (step S201: YES) during the operation of the stop control device for the internal combustion engine according to the second embodiment, it is determined whether or not the shift of the hybrid vehicle 1 is in the P range. (Step S202). That is, it is determined whether the shift of the hybrid vehicle 1 is the P range for stopping or the D range for traveling.
- step S202 If it is determined that the shift of the hybrid vehicle 1 is in the P range (step S202: YES), the adjustment torque is calculated using the map for the P range (step S203). On the other hand, if it is determined that the shift of the hybrid vehicle 1 is not in the P range (that is, the D range) (step S202: NO), the adjustment torque is calculated using the map for the D range. (Step S204).
- the rotational speed of the MG1 is smaller than that in the case of the P range. Therefore, when the D range map is used, the adjustment torque is calculated as a smaller value than when the P range map is used. This is because the rotational energy is proportional to the square of the rotational speed.
- FIG. 10 is a collinear diagram showing the engine speed and the speed of MG1.
- FIG. 11 is a graph showing the time integral of the angular velocity when the vehicle is stopped, and
- FIG. 12 is a graph showing the time integral of the angular velocity when traveling at a low speed.
- the torque of MG1 may be made smaller than 15 Nm and the rotational speed may be reduced over time t1. That is, in the D range where the rotational speed of MG1 is small, the same control as in the P range can be applied by making the torque of MG1 smaller than in the P range.
- the range of the vehicle is different (in other words, the number of revolutions of MG1 is different and the total amount of energy is different).
- the crank angle can be suitably controlled.
- the present invention is not limited to the above-described embodiment, and can be appropriately changed without departing from the gist or concept of the invention that can be read from the claims and the entire specification.
- the stop control device is also included in the technical scope of the present invention.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- Transportation (AREA)
- General Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Control Of Vehicle Engines Or Engines For Specific Uses (AREA)
- Output Control And Ontrol Of Special Type Engine (AREA)
- Hybrid Electric Vehicles (AREA)
- Combined Controls Of Internal Combustion Engines (AREA)
- Control Of Throttle Valves Provided In The Intake System Or In The Exhaust System (AREA)
Abstract
Description
先ず、第1実施形態に係る内燃機関の停止制御装置の動作について、図5から図8を参照して説明する。ここに図5は、第1実施形態に係る内燃機関の停止制御装置の動作を示すフローチャートである。また図6は、第1実施形態に係る内燃機関の停止制御装置の動作時における各種パラメータの変化を示すチャート図である。
次に、第2実施形態に係る内燃機関の停止制御装置の動作について、図9から図12を参照して説明する。ここに図9は、第2実施形態に係る内燃機関の停止制御装置の動作を示すフローチャートである。なお、第2実施形態は、上述した第1実施形態と一部の動作が異なるのみであり、その他の基本的な動作については概ね同様である。このため、図9では、図5において示した処理の一部を適宜省略し、第1実施形態と異なる処理についてのみ図示している。
10 ハイブリッド駆動装置
11 PCU
12 バッテリ
13 アクセル開度センサ
14 車速センサ
100 ECU
110 エンジン回転数検出部
120 クランク角検出部
130 エンジン停止制御判定部
140 MGトルク算出部
150 MGトルク制御部
160 スロットル制御部
200 エンジン
201 気筒
203 ピストン
205 クランクシャフト
206 クランクポジションセンサ
208 スロットルバルブ
209 スロットルモータ
210 吸気ポート
212 インジェクタ
214 排気ポート
300 動力分割機構
500 駆動軸
600 減速機構
MG1,MG2 モータジェネレータ
Claims (5)
- 3気筒以下の内燃機関の停止時の動作を制御する内燃機関の停止制御装置であって、
前記内燃機関のクランクシャフトに対してトルクを出力可能なモータと、
前記内燃機関の回転数を検出する回転数検出手段と、
前記内燃機関のクランクシャフトのクランク角を検出するクランク角検出手段と、
前記内燃機関が停止する際に、前記内燃機関の停止時におけるクランク角が所望の値となるように調整する調整トルクを出力するように前記モータを制御するモータ制御手段と、
前記内燃機関が停止する直前の吸気行程において、スロットル弁の開度を所定開度となるように制御するスロットル弁制御手段と、
前記内燃機関の回転数が所定値になった際のクランク角及び前記所定開度に基づいて前記調整トルクを決定する調整トルク決定手段と
を備えることを特徴とする内燃機関の停止制御装置。 - 前記所定開度は、前記内燃機関が停止する直前の吸気行程において、吸気負圧をゼロにまで小さくできる値として設定されていることを特徴とする請求の範囲第1項に記載の内燃機関の停止制御装置。
- 前記所定開度は、全開であることを特徴とする請求の範囲第1項に記載の内燃機関の停止制御装置。
- 前記モータの回転数を検出するモータ回転数検出手段を備え、
前記調整トルク決定手段は、前記内燃機関の停止制御開始時における前記モータの回転数が大きいほど前記調整トルクを大きく、前記モータの回転数が小さいほど前記調整トルクを小さくする
ことを特徴とする請求の範囲第1項に記載の内燃機関の停止制御装置。 - 前記調整トルク決定手段は、前記内燃機関のクランクシャフトに接続される変速機のシフトが走行用のDレンジである場合には、停止用のPレンジである場合と比べて前記調整トルクを小さくすることを特徴とする請求の範囲第1項に記載の内燃機関の停止制御装置。
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CN201180075286.4A CN103958859B (zh) | 2011-12-14 | 2011-12-14 | 内燃机的停止控制装置 |
JP2013548999A JP5846217B2 (ja) | 2011-12-14 | 2011-12-14 | 内燃機関の停止制御装置 |
US14/363,348 US9421970B2 (en) | 2011-12-14 | 2011-12-14 | Stop control apparatus for internal combustion engine |
DE112011105946.9T DE112011105946B4 (de) | 2011-12-14 | 2011-12-14 | Stoppsteuerungsgerät für Brennkraftmaschine |
PCT/JP2011/078914 WO2013088526A1 (ja) | 2011-12-14 | 2011-12-14 | 内燃機関の停止制御装置 |
IN4597DEN2014 IN2014DN04597A (ja) | 2011-12-14 | 2014-06-06 |
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PCT/JP2011/078914 WO2013088526A1 (ja) | 2011-12-14 | 2011-12-14 | 内燃機関の停止制御装置 |
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JP (1) | JP5846217B2 (ja) |
CN (1) | CN103958859B (ja) |
DE (1) | DE112011105946B4 (ja) |
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WO2014196572A1 (ja) * | 2013-06-07 | 2014-12-11 | トヨタ自動車株式会社 | 内燃機関の制御装置 |
US8939127B1 (en) | 2012-04-11 | 2015-01-27 | Toyota Jidosha Kabushiki Kaisha | Stop control apparatus for internal combustion engine |
CN105041484A (zh) * | 2014-04-22 | 2015-11-11 | 罗伯特·博世有限公司 | 用于停止内燃机的方法 |
JP2018034734A (ja) * | 2016-09-02 | 2018-03-08 | トヨタ自動車株式会社 | ハイブリッド車両の制御装置 |
JP2021085461A (ja) * | 2019-11-27 | 2021-06-03 | トヨタ自動車株式会社 | 捩り振動低減装置および捩り振動低減装置の制御装置 |
CN114198215A (zh) * | 2020-09-17 | 2022-03-18 | 丰田自动车株式会社 | 用于内燃机的控制器、用于内燃机的控制方法及存储介质 |
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Also Published As
Publication number | Publication date |
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US9421970B2 (en) | 2016-08-23 |
DE112011105946T5 (de) | 2014-09-25 |
IN2014DN04597A (ja) | 2015-05-08 |
CN103958859A (zh) | 2014-07-30 |
CN103958859B (zh) | 2016-08-24 |
DE112011105946B4 (de) | 2022-11-24 |
JPWO2013088526A1 (ja) | 2015-04-27 |
JP5846217B2 (ja) | 2016-01-20 |
US20140330476A1 (en) | 2014-11-06 |
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