WO2013190651A1 - 車両の制御装置 - Google Patents
車両の制御装置 Download PDFInfo
- Publication number
- WO2013190651A1 WO2013190651A1 PCT/JP2012/065697 JP2012065697W WO2013190651A1 WO 2013190651 A1 WO2013190651 A1 WO 2013190651A1 JP 2012065697 W JP2012065697 W JP 2012065697W WO 2013190651 A1 WO2013190651 A1 WO 2013190651A1
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- WIPO (PCT)
- Prior art keywords
- vehicle
- coasting control
- engine
- vehicle speed
- speed
- Prior art date
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- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
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- 239000003345 natural gas Substances 0.000 description 1
Images
Classifications
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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
- B60W30/00—Purposes of road vehicle drive control systems not related to the control of a particular sub-unit, e.g. of systems using conjoint control of vehicle sub-units
- B60W30/18—Propelling the vehicle
- B60W30/18009—Propelling the vehicle related to particular drive situations
- B60W30/18072—Coasting
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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
- B60W10/02—Conjoint control of vehicle sub-units of different type or different function including control of driveline clutches
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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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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D48/00—External control of clutches
- F16D48/06—Control by electric or electronic means, e.g. of fluid pressure
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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
- B60W30/00—Purposes of road vehicle drive control systems not related to the control of a particular sub-unit, e.g. of systems using conjoint control of vehicle sub-units
- B60W30/18—Propelling the vehicle
- B60W30/18009—Propelling the vehicle related to particular drive situations
- B60W30/18072—Coasting
- B60W2030/1809—Without torque flow between driveshaft and engine, e.g. with clutch disengaged or transmission in neutral
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W2520/00—Input parameters relating to overall vehicle dynamics
- B60W2520/10—Longitudinal speed
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W2540/00—Input parameters relating to occupants
- B60W2540/10—Accelerator pedal position
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
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- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
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- F16D2500/11—Application
- F16D2500/1107—Vehicles
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
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- F16D2500/30—Signal inputs
- F16D2500/306—Signal inputs from the engine
- F16D2500/3067—Speed of the engine
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
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- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
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- F16D2500/3124—Driving conditions, e.g. climbing hills, cornering, traffic
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
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- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
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- F16D2500/312—External to the vehicle
- F16D2500/3125—Driving resistance, i.e. external factors having an influence in the traction force, e.g. road friction, air resistance, road slope
- F16D2500/3127—Road slope
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D2500/00—External control of clutches by electric or electronic means
- F16D2500/30—Signal inputs
- F16D2500/314—Signal inputs from the user
- F16D2500/31406—Signal inputs from the user input from pedals
- F16D2500/3144—Accelerator pedal position
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D2500/00—External control of clutches by electric or electronic means
- F16D2500/30—Signal inputs
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- F16D2500/31406—Signal inputs from the user input from pedals
- F16D2500/3144—Accelerator pedal position
- F16D2500/31453—Accelerator pedal position threshold, e.g. switch
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D2500/00—External control of clutches by electric or electronic means
- F16D2500/30—Signal inputs
- F16D2500/316—Other signal inputs not covered by the groups above
- F16D2500/3161—Signal providing information about the state of engine accessories
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D2500/00—External control of clutches by electric or electronic means
- F16D2500/50—Problem to be solved by the control system
- F16D2500/508—Relating driving conditions
- F16D2500/50825—Hill climbing or descending
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D2500/00—External control of clutches by electric or electronic means
- F16D2500/50—Problem to be solved by the control system
- F16D2500/508—Relating driving conditions
- F16D2500/5085—Coasting
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D2500/00—External control of clutches by electric or electronic means
- F16D2500/70—Details about the implementation of the control system
- F16D2500/702—Look-up tables
- F16D2500/70252—Clutch torque
- F16D2500/7027—Engine speed
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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
Definitions
- the present invention includes a clutch mechanism capable of selectively connecting and disconnecting a power transmission path between a driving force source and a driving wheel, and allows the vehicle to coast by inertia by releasing the clutch mechanism during traveling.
- the present invention relates to a possible vehicle control apparatus.
- Fuel cut when the accelerator is returned during traveling, that is, when the accelerator opening is fully closed, for example, under a predetermined condition such as an engine speed equal to or higher than an idling speed and a predetermined vehicle speed or higher, This is control for stopping the supply of fuel to the engine.
- the engine stops the combustion operation when the fuel supply is cut off, but is rotated by the torque transmitted from the drive wheel side. Therefore, at the time of fuel cut execution, braking torque acts on the drive wheels due to the pumping loss, friction torque, etc. of the engine. That is, a so-called engine brake is applied to the vehicle.
- coasting control when the accelerator is returned during traveling, for example, by releasing the clutch provided between the engine and the drive wheel, to interrupt the power transmission between the engine and the drive wheel, In this control, the vehicle is coasted without the engine being rotated. Accordingly, when the coasting control is executed, the engine brake is not applied to the vehicle, so that the vehicle can travel inertially by effectively utilizing the inertia energy.
- this coasting control there are a case where the fuel supply to the engine is stopped while the coasting control is being executed, and a case where the engine rotational speed is reduced to about the idle rotational speed and the engine combustion operation is not stopped.
- the engine is stopped as in the former case, fuel is not consumed while the vehicle is coasting, so that a greater fuel efficiency improvement effect can be obtained.
- the engine is not stopped as in the latter case, the effect of improving the fuel consumption cannot be expected as much as when the engine is stopped, but in order to secure the hydraulic pressure when the engine is stopped, such as an electric oil pump or a hydraulic accumulator. It is not necessary to provide a necessary device separately.
- coasting control can be easily executed without changing the structure of the vehicle having the conventional configuration or adding a new device or equipment.
- the coasting control that does not stop the engine as in the latter case will be referred to as neutral coasting control or N coasting control.
- the coasting control device described in Japanese Patent Application Laid-Open No. 2010-2477773 releases a clutch provided between the engine and driving wheels when the vehicle engine does not perform work that contributes to traveling,
- the vehicle is configured to perform coasting control in which the vehicle is idling and the vehicle is coasting.
- the coasting control device starts coasting control when a coasting control start condition based on the accelerator opening and the number of rotations on the clutch driven side is satisfied, and the accelerator opening and the clutch driven side are performed during the coasting control.
- the coasting control is configured to end when the coasting control end condition based on the rotational speed is satisfied.
- the coasting control device obtains a difference between the vehicle speed at the start of the coasting control and the current vehicle speed during the coasting control, and when the difference is equal to or greater than a predetermined threshold value, the coasting control end condition is determined.
- the coasting control is configured to end.
- Japanese Patent Laid-Open No. 11-32404 discloses an actual vehicle that is caused by regenerative braking force in an electric vehicle in which a predetermined regenerative braking force corresponding to an engine brake is applied when both the accelerator pedal and the brake pedal are off. A control technique is described in which the regenerative braking force is changed so that the deceleration matches the target deceleration.
- the coasting control device described in the above Japanese Patent Application Laid-Open No. 2010-247773 has a normal coasting control when a speed change greater than a threshold occurs with respect to the vehicle speed at the start of the coasting control. Regardless of whether the coasting control end condition is satisfied, the coasting control is configured to end. Therefore, according to the invention described in Japanese Patent Application Laid-Open No. 2010-247773, coasting control can be terminated before a certain speed change occurs during the coasting control. As a result, during coasting, for example, even when the vehicle speed changes due to a change in the slope of the travel path, the vehicle speed increases or decreases above a certain speed in the coasting control state, and the vehicle is decelerated or accelerated. It is said that it is possible to prevent the occurrence of a situation that delays.
- the speed change amount in the deceleration direction at the beginning of control does not exceed the threshold value
- the speed change amount is calculated again when the vehicle speed changes from deceleration to speed increase and then increases to the initial speed at the start of control again.
- the coasting control is continued until the speed change amount exceeds the threshold value.
- the net amount of speed change in the speed increasing direction is the amount of speed increase from the lowest vehicle speed during deceleration.
- the net speed change amount in the speed increasing direction as described above may be large. And even if the driver or passenger feels a greater sense of acceleration by increasing the net amount of speed change in the speed increasing direction, coasting control is continued and no braking force is applied to the vehicle. May be longer. As a result, there is a risk that the driver or the passenger may feel uncomfortable or uneasy.
- the present invention has been made paying attention to the technical problem described above, and performs coasting control for allowing the vehicle to coast freely by interrupting power transmission between the driving force source and the driving wheel during traveling. It is an object of the present invention to provide a vehicle control device that can be appropriately executed without causing a person to feel uncomfortable or uneasy.
- the present invention includes a clutch mechanism that selectively connects or disconnects a power transmission path between a driving force source and a driving wheel, and interrupts the power transmission path during traveling.
- a vehicle control apparatus capable of coasting a vehicle, when the accelerator operation amount during traveling is returned to a predetermined operation amount or less, the clutch mechanism is released and the power transmission is performed.
- a ending means for ending the coasting control by engaging the clutch mechanism and connecting the power transmission path when the difference between the control and the clutch becomes greater than or equal to a predetermined value. It is the location.
- the present invention can further comprise means for detecting the gradient of the travel path.
- the execution means executes the coasting control when the accelerator operation amount during traveling is returned to a predetermined operation amount or less and the gradient is within a predetermined gradient range with 0% therebetween. Can be configured.
- the execution means according to the present invention can be configured to execute the coasting control when the accelerator operation amount during traveling is returned to a predetermined operation amount or less and the vehicle speed is a predetermined vehicle speed or more.
- the ending means can be configured to end the coasting control when the vehicle speed becomes lower than the predetermined vehicle speed.
- the vehicle to be controlled in the present invention can use an engine that outputs power by burning fuel as a driving force source.
- the present invention can include means for detecting the engine speed of the engine.
- the execution means performs the coasting control when the accelerator operation amount during traveling is returned to a predetermined operation amount or less and the engine is in a combustion operation, and at the time of executing the coasting control,
- the engine may be controlled so that the engine speed becomes an idling speed that is lower than the engine speed when the coasting control is not being performed.
- the clutch mechanism when the accelerator operation amount is returned to a predetermined operation amount or less during traveling, the clutch mechanism is released and the power transmission path between the driving force source and the driving wheels is interrupted. That is, coasting control is executed and the vehicle travels coasting. As a result, the travel distance of the vehicle in a state where no load is applied to the driving force source can be extended, and therefore the energy efficiency of the vehicle can be improved.
- the coasting control the vehicle speed is detected and the minimum value (minimum vehicle speed) of the vehicle speed is updated.
- the minimum value minimum vehicle speed
- the power transmission path between the driving force source and the driving wheel is connected, and the braking torque due to the load and resistance in the power transmission system is applied to the driving wheel. Therefore, it is possible to reduce the vehicle speed increased from the minimum vehicle speed by a predetermined change amount or more during the coasting control.
- the coasting control is terminated when the downhill slope of the travel path becomes steep during execution of the coasting control and the vehicle speed increases greatly accordingly.
- a braking force is applied to the vehicle, and an increase in vehicle speed is suppressed.
- the vehicle speed is reduced. Therefore, even when the driving environment changes during the coasting control and the vehicle speed increases, the coasting control is properly executed without causing the driver or passenger to feel uncomfortable or uneasy. Can be terminated.
- coasting control can be executed in consideration of the gradient of the road that is running. For example, when a vehicle travels on a flat road with a slope of 0%, or a gentle uphill road with a slope close to 0% or a gentle downhill road, coasting control is executed, and a steep uphill that cannot ignore the influence on the traveling load When traveling on a road or a steep downhill road, coasting control can be prevented from being executed. Therefore, coasting control can be executed appropriately.
- the coasting control can be executed in consideration of the influence of the vehicle speed, and the coasting control can be terminated.
- coasting control is executed when traveling in a vehicle speed range equal to or higher than a predetermined vehicle speed at which coasting control is effective, and coasting control is performed when traveling in a low vehicle speed range lower than a predetermined vehicle speed at which the coasting control effect is low. It can be prevented from executing and coasting control can be terminated. Therefore, coasting control can be effectively executed and terminated appropriately.
- coasting control when a vehicle equipped with an engine as a driving force source is to be controlled, coasting control can be executed in consideration of the operating state of the engine and the engine speed.
- the coasting control can be performed when the engine is in a combustion operation, and the engine speed can be reduced to the idling speed while the coasting control is being performed. Therefore, coasting control can be executed effectively and the fuel efficiency of the vehicle can be improved.
- FIG. 1 shows a drive system and a control system of a vehicle to be controlled in the present invention.
- a vehicle Ve shown in FIG. 1 includes an engine 1 and an automatic transmission 3 that is connected to the output side of the engine 1 and transmits power output from the engine 1 to drive wheels 2.
- an automatic transmission 3 is provided on the output side of the engine 1, and a drive wheel 2 is connected to a propeller shaft 4 connected to an output shaft 3 a of the automatic transmission 3 via a differential gear 5 and a drive shaft 6.
- a differential gear 5 and a drive shaft 6. are connected so that power can be transmitted.
- the vehicle Ve to be controlled in the present invention may be a front wheel drive vehicle or a four wheel drive vehicle.
- Engine 1 is a driving force source in the present invention, and is an internal combustion engine that outputs power by burning fuel, such as a gasoline engine, a diesel engine, or a natural gas engine.
- fuel such as a gasoline engine, a diesel engine, or a natural gas engine.
- FIG. 1 an electronically controlled throttle valve capable of electrically controlling the throttle opening and an electronically controlled fuel injection device capable of electrically controlling the fuel injection amount are provided.
- An example with a gasoline engine is shown. Therefore, the engine 1 is configured to be able to be operated with the best fuel efficiency by electrically controlling the rotational speed with respect to a predetermined load.
- the automatic transmission 3 is a transmission that shifts the torque output from the engine 1 and transmits the torque to the drive wheels 2.
- the vehicle Ve according to the present invention can be driven by any one of the rear wheel drive, the front wheel drive, and the four wheel drive, regardless of whether the automatic transmission 3 uses any of the above-described transmissions.
- the clutch mechanism 7 that selectively connects or disconnects the power transmission path between the engine 1 and the drive wheels 2 is provided.
- the automatic transmission 3 is configured by a stepped AT using a planetary gear.
- the configuration is the same as that of a conventional general AT, and a plurality of planetary gears (not shown), a forward clutch 7a that is engaged when setting the forward gear, and a gear when setting the reverse gear. And a reverse brake 7b.
- a clutch or a brake that is engaged when setting a specific forward gear is provided.
- the neutral state in the automatic transmission 3 is set. That is, by releasing all of the forward clutch 7a and the reverse brake 7b, the power transmission path between the engine 1 and the drive wheels 2 can be interrupted. Therefore, in the example shown in FIG. 1, the clutch mechanism 7 including the forward clutch 7a and the reverse brake 7b corresponds to the clutch mechanism in the present invention.
- a general belt type CVT is a forward / reverse switching for switching the rotation direction of the torque transmitted to the belt transmission mechanism and the drive wheel 2 between the forward direction and the reverse direction.
- the forward / reverse switching mechanism is provided with a forward clutch that is engaged when setting the forward movement state and a reverse brake that is engaged when setting the reverse movement state. Then, by releasing both the forward clutch and the reverse brake, the power transmission path between the engine 1 and the automatic transmission 3 is interrupted. That is, the neutral state is set in the automatic transmission 3. Therefore, in this case, the clutch mechanism in the present invention can be configured by the forward clutch and the reverse brake.
- the clutch mechanism according to the present invention can be configured by the two clutches described above.
- the clutch mechanism according to the present invention can be configured by the above-described clutch.
- a hybrid vehicle equipped with an internal combustion engine and an electric motor as a driving force source can be controlled.
- an electric vehicle equipped with an electric motor as a driving force source can be controlled.
- the vehicle Ve in the present invention is as described above regardless of the configuration of the driving force source of any configuration such as the engine 1, the electric motor, or the hybrid driving unit in which the engine 1 and the electric motor are combined.
- a clutch mechanism 7 is provided for selectively connecting or disconnecting a power transmission path between the driving force source and the driving wheel 2.
- the clutch mechanism 7 may be, for example, either a friction clutch or a meshing clutch.
- a friction clutch is used, either a wet type or a dry type may be used.
- the clutch mechanism 7 in the present invention is capable of selectively transmitting and interrupting torque between the driving force source such as the engine 1, the electric motor, or the hybrid driving unit and the driving wheel 2. That's fine.
- the braking force is applied to the vehicle Ve by regeneratively controlling the electric motor with the clutch mechanism 7 engaged. Can be generated. That is, when the vehicle Ve is traveling, the vehicle Ve can be braked by applying a braking torque to the drive wheels 2 by regenerating the motor of the driving force source with the clutch mechanism 7 engaged. .
- An electronic control unit (ECU) 8 for controlling the operation state of the engine 1 and the engagement and disengagement states of the clutch mechanism 7 as described above is provided.
- the electronic control unit 8 is configured mainly by a microcomputer, for example, and is configured to perform a calculation based on input data or data stored in advance and output a control command signal.
- the electronic control unit 8 includes a wheel speed sensor 9 that detects the rotational speed of each wheel of the vehicle Ve, an accelerator sensor 10 that detects the depression angle or depression amount of the accelerator pedal, a depression angle of the brake pedal, A brake sensor 11 that detects the amount of depression, an engine speed sensor 12 that detects the speed of the engine 1, an acceleration sensor 13 that detects the acceleration of the vehicle Ve, and a tilt angle sensor 14 that detects the tilt angle of the vehicle Ve.
- a detection signal from the sensor is input.
- the electronic control unit 8 is configured to output a signal for controlling the operating state of the engine 1, a signal for controlling the engagement and disengagement states of the clutch mechanism 7, and the like.
- a detection signal such as a sensor or a resolver for detecting the rotation speed of the electric motor is input to the electronic control device 8.
- the electronic control device 8 outputs a signal for controlling the operation state of the electric motor.
- the so-called neutral coasting control in which the vehicle Ve is coasted by releasing the clutch mechanism 7 in order to improve the fuel consumption of the vehicle Ve.
- the neutral coasting control in the present invention means that when the vehicle Ve is traveling at a predetermined vehicle speed or higher, for example, when the amount of depression of the accelerator pedal is returned to 0, the clutch mechanism 7 is released and the engine 1 is driven. In this control, the power transmission path to the wheel 2 is interrupted. In that case, the engine 1 is not stopped in the neutral coasting control in the present invention. That is, while the neutral coasting control is being executed, the engine 1 is reduced in its idling speed to about the idling speed, but the combustion operation is continued.
- the fuel consumption of the vehicle Ve can be further improved by releasing the clutch mechanism 7 and stopping the combustion operation of the engine 1.
- auxiliary equipment such as an oil pump and a compressor for an air conditioner, and a power source for driving a hydraulic power steering, a brake device and the like are lost. . Therefore, in that case, it is necessary to equip an alternative power source (for example, an electric motor) corresponding to the case where the engine 1 is stopped, a hydraulic accumulator, and the like separately.
- an alternative power source for example, an electric motor
- the neutral coasting control that does not stop the engine 1, the power source of the auxiliary machine, the power steering, or the brake device as described above is not lost during the execution of the control. There is no need to provide it. Therefore, it is possible to easily execute the neutral coasting control for a vehicle having a conventional configuration.
- the control device is, for example, a case where the traveling road changes to a steep downhill road while the neutral coasting control is being executed, and the vehicle speed continues to increase despite the coasting.
- the control can be appropriately executed without causing the driver or passenger to feel uncomfortable or uneasy.
- An example of the control is shown in the flowchart of FIG.
- the routine shown in this flowchart is repeatedly executed every predetermined short time.
- FIG. 2 first, various data relating to the running state and the operating state of the vehicle Ve are acquired (step S1). Specifically, the vehicle speed is obtained from the detection value of the wheel speed sensor 9. Further, the accelerator operation amount by the driver is obtained from the detection value of the accelerator sensor 10. Further, the brake operation amount by the driver is obtained from the detection value of the brake sensor 11. Further, the rotational speed of the engine 1 is obtained from the detection value of the engine rotational speed sensor 12. Then, the gradient of the traveling road is obtained from the detection value of the acceleration sensor 13 or the detection value of the inclination angle sensor 14.
- the neutral coasting control is configured to start the control when the vehicle Ve is traveling at a vehicle speed equal to or higher than a predetermined vehicle speed, with the accelerator operation amount being returned to 0 or less than the predetermined operation amount. Has been.
- the fact that the accelerator operation amount is returned to 0 or below a predetermined operation amount means that the accelerator pedal that has been depressed by the driver is returned to a released state, for example.
- the accelerator operation amount that is a determination criterion does not necessarily have to be 0.
- coasting control is started when the accelerator operation amount is returned to a predetermined operation amount A or less.
- the predetermined operation amount A can be set so as to increase or decrease according to the engine speed Ne.
- the predetermined vehicle speed is a reference value for determining the execution of the neutral coasting control, and is a value set in advance through experiments, simulations, or the like. For example, it is set as a threshold value for determining a vehicle speed range in which neutral coasting control is effective.
- the vehicle speed when the vehicle Ve travels due to a creep phenomenon is, for example, about 15 to 20 km / h. Is set.
- the running condition of the neutral coasting control is traveling on a road having a predetermined gradient range with a gradient of 0% and that the engine 1 is in a combustion operation.
- the predetermined gradient range is a range used as a reference for determining an uphill road and a downhill road where the influence on a flat road having a gradient of 0% and a traveling load is negligible, and is set in advance by experiment, simulation, or the like. It is a range.
- the predetermined gradient range may be set according to the vehicle speed. For example, a gradient range of about ⁇ 2% is set when the vehicle speed is less than 40 km / h, and a gradient range of about ⁇ 4% is set when the vehicle speed is 40 km / h or higher. .
- the execution of the neutral coasting control is determined when all the execution conditions for the neutral coasting control are satisfied. That is, the vehicle Ve is generating a driving force by the output of the engine 1, is traveling on a road within a predetermined gradient range at a vehicle speed equal to or higher than a predetermined vehicle speed, and the accelerator operation amount is a predetermined operation amount A. When returned to the following, execution of neutral coasting control is permitted.
- step S2 if at least one of the above execution conditions is not satisfied, and a negative determination is made in step S2, the process proceeds to step S3, and the neutral coasting control is not executed and normal control is performed.
- Executed For example, a fuel cut that temporarily stops fuel supply to the engine 1 during traveling is executed.
- control for regenerating the electric motor and outputting a regenerative torque is executed. That is, the vehicle Ve is controlled so that a braking force by a so-called engine brake or regenerative torque of the electric motor is applied to the vehicle Ve. Thereafter, this routine is once terminated.
- step S2 the process proceeds to step S4, and whether or not the neutral coasting control has been executed in the previous routine. Is judged. Immediately after the start of this routine and because the neutral coasting control has not been executed in the previous routine, if a negative determination is made in this step S4, the routine proceeds to step S5, where the current vehicle speed detected in this routine is determined. It is stored as the minimum vehicle speed Vmin. Then, neutral coasting control is executed (step S6). That is, the clutch mechanism 7 is released and the vehicle Ve travels inertially. Further, the engine 1 is in a no-load state because the power transmission with the drive wheel 2 is cut off.
- the idling rotational speed referred to here is a rotational speed that is lower than the normal range of the rotational speed of the engine 1 that is operated during normal traveling, and is the lower limit rotational speed at which the unloaded engine 1 can autonomously rotate. That's it.
- the normal traveling is a state in which the vehicle Ve travels with power output from the engine 1 with the clutch mechanism 7 engaged. As described above, when the neutral coasting control is executed in step S6, this routine is once ended.
- step S7 it is determined whether or not the current vehicle speed detected in the current routine is faster than the minimum vehicle speed Vmin stored in the previous routine. If the current vehicle speed is equal to or lower than the minimum vehicle speed Vmin, if a negative determination is made in step S7, the process proceeds to step S8, and the value of the minimum vehicle speed Vmin is updated. That is, the current vehicle speed is newly stored as the latest minimum vehicle speed Vmin. And it progresses to above-mentioned step S6, and neutral coasting control is performed similarly. Thereafter, this routine is once terminated.
- step S7 if the current vehicle speed is faster than the minimum vehicle speed Vmin, if a positive determination is made in step S7, the process proceeds to step S9, where the difference between the current vehicle speed and the minimum vehicle speed Vmin is greater than or equal to a predetermined value ⁇ . It is determined whether or not there is. That is, it is determined whether or not the vehicle speed increase amount from the minimum vehicle speed Vmin detected and updated during execution of the neutral coasting control is equal to or greater than the predetermined value ⁇ .
- the neutral coasting control is performed when the amount of increase in the vehicle speed that rises during execution of the neutral coasting control, particularly when the amount of increase in the vehicle speed from the minimum vehicle speed Vmin during execution of the neutral coasting control increases. Is configured to exit. In other words, the neutral coasting control is terminated to place the vehicle Ve in a state where the engine brake is applied, and the increase in the vehicle speed is suppressed.
- the predetermined value ⁇ is a threshold value for determining whether the driver or passenger feels uncomfortable or uneasy when the vehicle speed increases during execution of the neutral coasting control. Is set in advance. Specifically, for example, a value of about 5 to 10 km / h is set as the upper limit value of the speed increase amount at which the driver or passenger does not feel uncomfortable or uneasy when the vehicle Ve travels inertially.
- step S9 If the difference between the current vehicle speed and the minimum vehicle speed Vmin is smaller than the predetermined value ⁇ and thus a negative determination is made in step S9, the process proceeds to step S6 described above, and similarly, the neutral coasting control is executed. . That is, the running neutral coasting control is continued. Thereafter, this routine is once terminated.
- step S9 determines whether the difference between the current vehicle speed and the minimum vehicle speed Vmin is equal to or greater than the predetermined value ⁇ . If the determination in step S9 is affirmative, the process proceeds to step S3 described above, and the neutral coasting control is executed. Instead, normal control is performed. That is, the neutral coasting control being executed is terminated. Specifically, the clutch mechanism 7 that has been released to execute the neutral coasting control is engaged, and the power transmission between the engine 1 and the drive wheels 2 is enabled. As a result, the vehicle Ve is in a state where a so-called engine brake is applied, and an increase in the vehicle speed is suppressed. Alternatively, the vehicle speed is reduced. Thereafter, this routine is once terminated.
- FIG. 4 and FIG. 5 are time charts showing changes in the vehicle speed when the neutral coasting control according to the present invention as described above is executed.
- the time chart of FIG. 4 is an example when neutral coasting control is executed when the vehicle Ve is traveling on a downhill road.
- the neutral vehicle coasting control is executed at time t1 while the vehicle Ve is traveling at a vehicle speed Va on a downhill road having a predetermined slope, the vehicle Ve enters a coasting state.
- the force that causes the vehicle Ve to travel in the downhill direction due to the gravity acting on the vehicle Ve on the downhill road is greater than the running resistance of the vehicle Ve, the vehicle Ve travels on the downhill road while increasing the speed.
- the minimum value of the vehicle speed during the execution of the control is constantly updated.
- the vehicle speed Va at time t1 at the start of the neutral coasting control is stored as the minimum vehicle speed Vmin.
- the neutral coasting control is terminated.
- the neutral coasting control is finished, the engine Ve is applied to the vehicle Ve, so that an increase in the vehicle speed of the vehicle Ve is suppressed. Or the vehicle speed decreases.
- the neutral coasting control when the neutral coasting control is executed on the downhill road, the vehicle speed of the vehicle Ve traveling on the downhill road continues to increase, and if the speed increase amount exceeds a certain level, the driver and the occupant You may feel anxiety due to the rise of.
- the neutral coasting control when the amount of increase from the minimum vehicle speed Vmin during execution of the neutral coasting control reaches the predetermined value ⁇ , the neutral coasting control is terminated. An engine brake is applied to the vehicle Ve. Therefore, it is possible to prevent the vehicle speed from excessively increasing during the execution of the neutral coasting control, and it is possible to prevent the driver and the passenger from feeling uneasy.
- the time chart of FIG. 5 shows that when the vehicle Ve is traveling on a flat road, a gentle uphill road, or a gentle downhill road, the neutral coasting control is executed, and the running road is steep during the execution of the control. This is an example of changing to a downhill road.
- neutral coasting control is executed at time t3 while the vehicle Ve is traveling at a vehicle speed Vb on a flat road or a road with a gentle slope, the vehicle Ve enters a coasting state. In this case, the vehicle Ve continues to travel by inertial energy, but the vehicle speed gradually decreases due to travel resistance.
- the minimum vehicle speed Vmin from time t3 when the neutral coasting control is started is sequentially updated and stored.
- the neutral coasting control is terminated.
- the neutral coasting control is finished, the engine Ve is applied to the vehicle Ve, so that an increase in the vehicle speed of the vehicle Ve is suppressed. Or the vehicle speed decreases.
- the neutral coasting control when the traveling road changes to a steep downhill road and the vehicle speed change state changes from deceleration to acceleration, the vehicle speed at the beginning of the control starts. Even if the vehicle speed is not higher than Vb, the vehicle speed increase amount from the minimum vehicle speed Vmin, that is, the net speed increase amount may increase. Even if the vehicle speed is low, the driver or the passenger may feel uncomfortable or uneasy when the net amount of acceleration increases.
- the neutral coasting control according to the present invention as described above, the minimum vehicle speed Vmin is updated during the execution of the control, and when the vehicle speed increase amount from the minimum vehicle speed Vmin reaches a predetermined value ⁇ . Control is terminated. Therefore, as shown in FIG. 5, the neutral coasting control is appropriately performed without causing anxiety to the driver and the occupant even when the net speed increase amount of the vehicle speed increases when the neutral coasting control is executed. Can be executed.
- the vehicle control device of the present invention when the accelerator operation amount is returned to the predetermined operation amount A or less while the vehicle Ve is traveling, the rotational speed of the engine 1 is maintained at the idling rotational speed. At the same time, the clutch mechanism 7 is released and the power transmission path between the engine 1 and the drive wheels 2 is interrupted. That is, the neutral coasting control is executed, and the vehicle Ve is allowed to coast. As a result, the travel distance of the vehicle Ve in a state where no load is applied to the engine 1 can be extended, and the fuel efficiency of the vehicle Ve can be improved.
- the vehicle speed is detected and the minimum vehicle speed Vmin of the vehicle speed is updated.
- the clutch mechanism 7 is engaged and coasting control is terminated. That is, the power transmission path between the engine 1 and the drive wheel 2 is connected, and a braking torque due to a load or resistance in the power transmission system is applied to the drive wheel 2. Therefore, the vehicle speed increased from the minimum vehicle speed Vmin by the predetermined value ⁇ or more during the neutral coasting control can be reduced.
- the functional means for executing steps S2 to S9 corresponds to the “execution means” in the present invention.
- the functional means for executing step S8 corresponds to “update means” in the present invention, and the functional means for executing steps S3 and S9 corresponds to “end means” in the present invention.
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- Engineering & Computer Science (AREA)
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- Combustion & Propulsion (AREA)
- Transportation (AREA)
- General Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Control Of Driving Devices And Active Controlling Of Vehicle (AREA)
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- Hydraulic Clutches, Magnetic Clutches, Fluid Clutches, And Fluid Joints (AREA)
Abstract
Description
Claims (4)
- 駆動力源と駆動輪との間の動力伝達経路を選択的に接続または遮断するクラッチ機構を備え、走行中に前記動力伝達経路を遮断して車両を惰性走行させることが可能な車両の制御装置において、
車速を検出する手段と、
走行中アクセル操作量が所定の操作量以下に戻された場合に、前記クラッチ機構を解放して前記動力伝達経路を遮断することにより前記車両を惰性走行させる惰行制御を実行する実行手段と、
前記惰行制御の実行時に、前記車速の最低値を更新する更新手段と、
現在の前記車速と最新の前記最低値との差が所定値以上になった場合に、前記クラッチ機構を係合して前記動力伝達経路を接続することにより前記惰行制御を終了させる終了手段と
を備えていることを特徴とする車両の制御装置。 - 走行路の勾配を検出する手段を更に備え、
前記実行手段は、走行中アクセル操作量が所定の操作量以下に戻され、かつ、前記勾配が0%を挟んだ所定の勾配範囲内である場合に、前記惰行制御を実行する手段を含む
ことを特徴とする請求項1に記載の車両の制御装置。 - 前記実行手段は、走行中アクセル操作量が所定の操作量以下に戻され、かつ、前記車速が所定車速以上の場合に、前記惰行制御を実行する手段を含み、
前記終了手段は、前記車速が前記所定車速よりも低くなった場合に、前記惰行制御を終了させる手段を含む
ことを特徴とする請求項1に記載の車両の制御装置。 - 前記駆動力源は、燃料を燃焼させて動力を出力するエンジンを含み、
前記エンジンのエンジン回転数を検出する手段を更に備え、
前記実行手段は、走行中アクセル操作量が所定の操作量以下に戻され、かつ、前記エンジンが燃焼運転中である場合に、前記惰行制御を実行するとともに、前記惰行制御の実行時に、前記エンジン回転数が前記惰行制御が実行されていない走行時におけるエンジン回転数よりも低いアイドリング回転数になるように、前記エンジンを制御する手段を含む
ことを特徴とする請求項1に記載の車両の制御装置。
Priority Applications (5)
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CN201280074025.5A CN104364546B (zh) | 2012-06-20 | 2012-06-20 | 车辆的控制装置 |
JP2014521139A JP6130367B2 (ja) | 2012-06-20 | 2012-06-20 | 車両の制御装置 |
US14/408,405 US9242649B2 (en) | 2012-06-20 | 2012-06-20 | Vehicle control system |
PCT/JP2012/065697 WO2013190651A1 (ja) | 2012-06-20 | 2012-06-20 | 車両の制御装置 |
EP12879256.1A EP2865912B1 (en) | 2012-06-20 | 2012-06-20 | Vehicle control device |
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PCT/JP2012/065697 WO2013190651A1 (ja) | 2012-06-20 | 2012-06-20 | 車両の制御装置 |
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US (1) | US9242649B2 (ja) |
EP (1) | EP2865912B1 (ja) |
JP (1) | JP6130367B2 (ja) |
CN (1) | CN104364546B (ja) |
WO (1) | WO2013190651A1 (ja) |
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JP2016118237A (ja) * | 2014-12-19 | 2016-06-30 | 三菱ふそうトラック・バス株式会社 | 車両の走行制御装置 |
JP2016118238A (ja) * | 2014-12-19 | 2016-06-30 | 三菱ふそうトラック・バス株式会社 | 車両の走行制御装置 |
JPWO2016103419A1 (ja) * | 2014-12-25 | 2017-09-28 | ボルボトラックコーポレーション | 変速機の制御装置及び変速機の制御方法 |
JP2018194028A (ja) * | 2017-05-12 | 2018-12-06 | いすゞ自動車株式会社 | 変速制御装置 |
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KR101822768B1 (ko) * | 2013-12-26 | 2018-01-26 | 아이신에이더블류 가부시키가이샤 | 자동 변속기의 유압 제어 장치 |
US9321355B1 (en) * | 2015-06-30 | 2016-04-26 | Proterra Inc. | Controlling electric vehicle operation based on inclination |
KR101826550B1 (ko) * | 2015-11-30 | 2018-02-07 | 현대자동차 주식회사 | 차량의 변속 제어 장치 및 이를 이용한 변속 제어 방법 |
US10232840B2 (en) * | 2016-08-08 | 2019-03-19 | Ford Global Technologies, Llc | Deceleration control for a hybrid vehicle during towing |
KR102371236B1 (ko) * | 2016-12-15 | 2022-03-04 | 현대자동차 주식회사 | 친환경 차량의 타행 주행 제어 방법 |
JP6859783B2 (ja) * | 2017-03-22 | 2021-04-14 | いすゞ自動車株式会社 | 走行制御装置、車両および走行制御方法 |
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Also Published As
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US9242649B2 (en) | 2016-01-26 |
US20150151760A1 (en) | 2015-06-04 |
EP2865912A1 (en) | 2015-04-29 |
EP2865912B1 (en) | 2017-11-08 |
EP2865912A4 (en) | 2016-06-29 |
JPWO2013190651A1 (ja) | 2016-02-08 |
CN104364546B (zh) | 2017-02-22 |
CN104364546A (zh) | 2015-02-18 |
JP6130367B2 (ja) | 2017-05-17 |
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