WO2014045901A1 - 車両の制御装置 - Google Patents
車両の制御装置 Download PDFInfo
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- WO2014045901A1 WO2014045901A1 PCT/JP2013/074068 JP2013074068W WO2014045901A1 WO 2014045901 A1 WO2014045901 A1 WO 2014045901A1 JP 2013074068 W JP2013074068 W JP 2013074068W WO 2014045901 A1 WO2014045901 A1 WO 2014045901A1
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- shift
- vehicle
- accelerator operation
- driving force
- control
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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
- B60W30/02—Control of vehicle driving stability
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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
- F16H—GEARING
- F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
- F16H61/02—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing characterised by the signals used
- F16H61/0202—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing characterised by the signals used the signals being electric
- F16H61/0204—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing characterised by the signals used the signals being electric for gearshift control, e.g. control functions for performing shifting or generation of shift signal
- F16H61/0213—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing characterised by the signals used the signals being electric for gearshift control, e.g. control functions for performing shifting or generation of shift signal characterised by the method for generating shift signals
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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
- B60W10/10—Conjoint control of vehicle sub-units of different type or different function including control of change-speed gearings
- B60W10/11—Stepped gearings
- B60W10/115—Stepped gearings with planetary gears
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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
- B60W10/18—Conjoint control of vehicle sub-units of different type or different function including control of braking systems
- B60W10/184—Conjoint control of vehicle sub-units of different type or different function including control of braking systems with wheel brakes
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- 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
- B60W30/02—Control of vehicle driving stability
- B60W30/045—Improving turning performance
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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
- F16H—GEARING
- F16H59/00—Control inputs to control units of change-speed- or reversing-gearings for conveying rotary motion
- F16H59/50—Inputs being a function of the status of the machine, e.g. position of doors or safety belts
- F16H59/54—Inputs being a function of the status of the machine, e.g. position of doors or safety belts dependent on signals from the brakes, e.g. parking 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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- F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
- F16H61/02—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing characterised by the signals used
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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
- F16H—GEARING
- F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
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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
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B60W2540/00—Input parameters relating to occupants
- B60W2540/10—Accelerator pedal position
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W2710/00—Output or target parameters relating to a particular sub-units
- B60W2710/10—Change speed gearings
- B60W2710/1005—Transmission ratio engaged
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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
- F16H—GEARING
- F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
- F16H61/02—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing characterised by the signals used
- F16H61/0202—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing characterised by the signals used the signals being electric
- F16H61/0204—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing characterised by the signals used the signals being electric for gearshift control, e.g. control functions for performing shifting or generation of shift signal
- F16H61/0213—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing characterised by the signals used the signals being electric for gearshift control, e.g. control functions for performing shifting or generation of shift signal characterised by the method for generating shift signals
- F16H2061/0223—Generating of new shift maps, i.e. methods for determining shift points for a schedule by taking into account driveline and vehicle conditions
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
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- F16H—GEARING
- F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
- F16H61/02—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing characterised by the signals used
- F16H61/0202—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing characterised by the signals used the signals being electric
- F16H61/0204—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing characterised by the signals used the signals being electric for gearshift control, e.g. control functions for performing shifting or generation of shift signal
- F16H61/0213—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing characterised by the signals used the signals being electric for gearshift control, e.g. control functions for performing shifting or generation of shift signal characterised by the method for generating shift signals
- F16H2061/0225—Modifying of shift maps by manual control, e.g. by learning values from the driver during manual shift mode
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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
- F16H—GEARING
- F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
- F16H61/02—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing characterised by the signals used
- F16H61/0202—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing characterised by the signals used the signals being electric
- F16H61/0204—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing characterised by the signals used the signals being electric for gearshift control, e.g. control functions for performing shifting or generation of shift signal
- F16H61/0213—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing characterised by the signals used the signals being electric for gearshift control, e.g. control functions for performing shifting or generation of shift signal characterised by the method for generating shift signals
- F16H2061/0227—Shift map selection, i.e. methods for controlling selection between different shift maps, e.g. to initiate switch to a map for up-hill driving
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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
- F16H—GEARING
- F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
- F16H61/02—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing characterised by the signals used
- F16H61/0202—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing characterised by the signals used the signals being electric
- F16H61/0204—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing characterised by the signals used the signals being electric for gearshift control, e.g. control functions for performing shifting or generation of shift signal
- F16H61/0213—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing characterised by the signals used the signals being electric for gearshift control, e.g. control functions for performing shifting or generation of shift signal characterised by the method for generating shift signals
- F16H2061/0234—Adapting the ratios to special vehicle conditions
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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
- F16H—GEARING
- F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
- F16H61/16—Inhibiting or initiating shift during unfavourable conditions , e.g. preventing forward-reverse shift at high vehicle speed, preventing engine overspeed
- F16H2061/163—Holding the gear for delaying gear shifts under unfavorable conditions, e.g. during cornering
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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
- F16H—GEARING
- F16H59/00—Control inputs to control units of change-speed- or reversing-gearings for conveying rotary motion
- F16H59/14—Inputs being a function of torque or torque demand
- F16H59/18—Inputs being a function of torque or torque demand dependent on the position of the accelerator pedal
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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
- F16H—GEARING
- F16H59/00—Control inputs to control units of change-speed- or reversing-gearings for conveying rotary motion
- F16H59/50—Inputs being a function of the status of the machine, e.g. position of doors or safety belts
- F16H59/58—Inputs being a function of the status of the machine, e.g. position of doors or safety belts dependent on signals from the steering
Definitions
- the present invention relates to a vehicle control apparatus that controls the driving force and braking force of a vehicle during turning to improve the turning performance of the vehicle and stabilize the behavior of the vehicle during turning.
- Japanese Patent Laying-Open No. 2005-256636 discloses a vehicle stabilization control system that controls a driving force so that a vehicle stability factor follows a target value.
- the control system described in Japanese Patent Laying-Open No. 2005-256636 calculates a physical quantity for generating a basic required driving force requested by a driver at a driving wheel of a vehicle during turning, and also calculates the front and rear wheels of the vehicle.
- the target value of the stability factor is calculated based on the detection result of the load applied to each wheel and the estimation result of the virtual turning radius of the vehicle.
- the physical quantity corresponding to the basic required driving force is corrected so that the actual stability factor of the vehicle follows the target value, and the driving force corresponding to the corrected physical quantity is generated on the driving wheels. ing.
- Japanese Patent Application Laid-Open No. 2011-218953 describes an invention relating to a driving force control apparatus configured to control the driving force of driving wheels so that the steering characteristic of the vehicle follows the target steering characteristic.
- the driving force of the vehicle is controlled so that the stability factor of the vehicle becomes the target stability factor.
- the driving force of the vehicle is controlled so that the steering characteristic of the vehicle becomes a target steering characteristic. That is, so-called turning performance improvement control is executed.
- the driving force control in the above-described turning performance improvement control is such that the driving force is automatically controlled based on the running state and behavior of the vehicle, apart from the required driving force based on the driver's accelerator operation and brake operation. Become. For example, when the vehicle turns, the target yaw rate of the vehicle is obtained based on values such as the vehicle speed and the steering angle, and the vehicle driving force and control are adjusted so that the actual yaw rate of the vehicle approaches the target yaw rate. Power is automatically controlled.
- the vehicle is equipped with a transmission that changes the output torque of the engine according to the gear ratio and transmits it to the drive wheel side.
- a transmission that changes the output torque of the engine according to the gear ratio and transmits it to the drive wheel side.
- automatic transmissions such as a stepped transmission using a planetary gear mechanism and a belt-type continuously variable transmission are widely used.
- Such an automatic transmission is basically controlled so as to appropriately set a gear position or a gear ratio according to a required driving force determined based on a vehicle speed and an accelerator opening.
- shift control is executed with reference to a shift map or shift diagram as shown in FIG.
- a shift execution condition determined by a vehicle speed and a load on the engine such as an accelerator operation amount or a throttle opening, that is, a shift line is set.
- a shift line that is, an upshift line and a downshift, are set using the vehicle speed and the accelerator opening as parameters.
- the shift is executed when the driving state and the traveling state of the vehicle satisfy the shift execution condition on the shift map.
- the shift stage is shifted to the shift stage to be moved.
- the automatic transmission performs an upshift from the first speed to the second speed, for example, the third speed.
- the automatic transmission performs a downshift from the third speed to the second speed.
- an unintended shift may be executed regardless of the actual driving state.
- the driving force control in the turning performance improvement control is executed while the vehicle is traveling in the driving state represented by the point O0 in FIG. 7, the driving force is reduced by the turning performance improvement control. Become. In this case, the vehicle travels substantially in the driving state represented by the point A0. That is, although the accelerator opening is not actually changed, the driving force is automatically controlled and lowered. As a result, the vehicle travels in the driving state represented by the driving point (that is, the point A0) at the accelerator opening level corresponding to the reduced driving force in FIG.
- the driving force is automatically reduced by the turning performance improvement control, so the driver may step on the accelerator to make up for the decrease in the driving force.
- the accelerator opening is increased, and the above operating point moves from point O0 to point B0 in FIG.
- the shift stage of the automatic transmission is downshifted.
- the downshift is executed even though it is in an appropriate operating state to maintain the gear position set at the point O0.
- the present invention has been made paying attention to the technical problem described above, and in a vehicle equipped with an automatic transmission, driving in turning performance improvement control is performed so that shifting is not executed against the intention of the driver. It is an object of the present invention to provide a vehicle control device that can appropriately execute force control and shift control of an automatic transmission without causing interference.
- a vehicle control apparatus is a transmission means for performing shift control of the automatic transmission based on a shift execution condition including a shift execution threshold value determined by a vehicle speed and a driver's accelerator operation amount.
- Driving force control means for controlling the driving force during turning to stabilize the vehicle behavior, and the accelerator operation amount under the shift execution condition when the turning performance improvement control is executed.
- Shift condition correction means for correcting the value of
- the shift condition correcting means includes means for correcting the value of the accelerator operation amount in a direction in which the accelerator operation amount increases when the driving force is reduced by the turning performance improvement control.
- the shift condition correcting means includes means for correcting the value of the accelerator operation amount in a direction in which the accelerator operation amount decreases when the driving force is increased by the turning performance improvement control.
- the driving state of the vehicle satisfies the shift execution condition with respect to the change amount of the driving force or the accelerator operation amount corresponding to the change amount of the driving force by the turning performance improvement control. It further comprises shift possibility determination means for setting a threshold for determining the possibility that shift is executed in the automatic transmission by satisfying the shift condition correction means, the shift condition correction means corresponding to the amount of change in the driving force or equivalent thereto. And means for prohibiting the correction when the accelerator operation amount is smaller than the threshold value.
- the shift possibility determining means includes means for setting, as the threshold value, a change amount of the accelerator operation amount necessary for the driving state of the vehicle to satisfy the shift execution condition.
- the automatic transmission means sets a shift execution threshold other than the shift execution condition for the accelerator operation amount or the accelerator operation speed, and the accelerator operation amount or the accelerator operation speed is the other Means for executing a downshift in the automatic transmission when the shift execution threshold value is greater than the shift execution threshold value, and the shift condition correction means reduces the shift execution threshold value when the turning performance improvement control is executed.
- the threshold is set based on the difference between the actual driving point and the current shift execution threshold.
- the shift condition correcting means includes means for correcting the value of the accelerator operation amount in a direction in which a shift is executed with a larger accelerator operation amount when the driving force is reduced by the turning performance improvement control. .
- the shift condition correction means includes means for correcting the value of the accelerator operation amount in a direction in which a shift is executed with a smaller accelerator operation amount when the driving force is increased by the turning performance improvement control. .
- the shift execution condition includes a shift map
- the shift execution threshold includes a shift line in the shift map
- the turning performance improvement control for automatically controlling the driving force of the vehicle to stabilize the vehicle behavior during the turning is executed.
- the shift execution condition in the shift control of the automatic transmission is temporarily changed.
- the vehicle speed and the accelerator operation amount by the driver are adopted as parameters as the shift execution condition, and the value of the accelerator operation amount is corrected when the turning performance improvement control is executed. The Therefore, even when a vehicle equipped with an automatic transmission is controlled, unnecessary shifts are not executed against the driver's intention. That is, the driving force control in the turning performance improvement control and the shift control of the automatic transmission can be appropriately executed without causing interference with each other.
- the driving force automatically controlled in the turning performance improvement control of the present invention includes a positive driving force for driving the vehicle and a negative driving force for braking the vehicle, that is, a braking force.
- a positive driving force for driving the vehicle when the driving force is changed in the positive direction, the output of the driving force source of the vehicle is increased. At that time, if the braking force has already been generated, the braking force is reduced.
- the driving force when the driving force is changed in the negative direction, the driving force is changed in the negative direction by reducing the output of the driving force source of the vehicle or by applying a braking force to the vehicle. At that time, if the braking force has already been generated, the braking force is increased.
- the driving force control in the turning performance improvement control and the shift control of the automatic transmission can be appropriately executed without interfering with each other so as to avoid the shift not intended by the driver.
- the shift possibility determining means determines that the automatic transmission is unlikely to perform a shift due to the execution of the turning performance improvement control, the automatic transmission shift by the shift condition correcting means is performed. Correction of shift execution conditions in control is prohibited. Therefore, it is possible to avoid an increase in the burden of driving operation due to correction of shift execution conditions that are not actually required.
- the shift possibility determination means determines the execution possibility of the shift in the automatic transmission due to the turning performance improvement control
- the shift execution possibility is determined with respect to the accelerator operation amount of the driver.
- a threshold value is set. Therefore, it is possible to reliably avoid an increase in the burden on the driver's accelerator operation due to correction of shift execution conditions that are not actually required.
- the driving force for improving the turning performance can be appropriately executed without interfering with each other.
- These intentional shifts by the driver are executed based on other shift execution threshold values set for the accelerator operation amount and the accelerator operation speed, in addition to the shift execution conditions in the shift control as described above.
- a downshift such as a power-on downshift or a kickdown is executed when the accelerator operation amount or the accelerator operation speed exceeds another shift execution threshold set for each.
- the other shift execution threshold value is corrected in a direction that makes it difficult to perform the downshift.
- a downshift such as a power-on downshift or kickdown being executed against the intention of the driver when the driving force control for improving the turning performance is executed.
- FIG. 1 is a schematic diagram showing the configuration and control system of a vehicle to be controlled in the present invention.
- the control device of the present invention is applied to a vehicle that can control the driving force and braking force of the vehicle independently of driving operations such as an accelerator operation and a brake operation by the driver. That is, the vehicle Ve shown in FIG. 1 has a configuration capable of automatically controlling the driving force and the braking force separately from the control of the driving force and the braking force of the vehicle based on the driving operation by the driver. .
- the vehicle Ve has left and right front wheels 1 and 2 and left and right rear wheels 3 and 4.
- the vehicle Ve is configured as a rear wheel drive vehicle, and the rear wheels 3 and 4 are driven by the power output from the engine 5.
- an internal combustion engine such as a gasoline engine, a diesel engine, or a natural gas engine can be employed.
- the engine 5 is provided with, for example, an electronically controlled throttle valve or an electronically controlled fuel injection device. Therefore, the output of the engine 5 can be automatically controlled by electrically controlling the operation of the electronically controlled throttle valve or the electronically controlled fuel injection device.
- an automatic transmission 6 for shifting the output torque of the engine 5 and transmitting it to the drive wheels 3 and 4 side.
- the automatic transmission 6 for example, a stepped transmission using a planetary gear mechanism and a friction engagement device, a belt-type continuously variable transmission, or the like is used.
- a stepped automatic transmission 6 that executes shift control using a shift map as shown in FIG. 6 is employed.
- the vehicle Ve In order to control the output of the engine 5 and the operation of the automatic transmission 6, the vehicle Ve is provided with a vehicle electronic control unit (hereinafter referred to as ECU) 7.
- the ECU 7 is electrically connected to the engine 5, and by controlling the output of the engine 5 by the ECU 7, it is possible to automatically control the driving force of the vehicle Ve generated by the rear wheels 3 and 4 as driving wheels.
- the ECU 7 is also electrically connected to the automatic transmission 6 and controls the operation of the automatic transmission 6 by the ECU 7 so that the automatic transmission 6 sets a predetermined gear stage or gear ratio. Can be executed.
- each of the wheels 1, 2, 3, 4 is equipped with brake devices 8, 9, 10, 11 individually.
- Each of these brake devices 8, 9, 10, 11 is connected to the ECU 7 via a brake actuator 12. Therefore, by controlling the brake actuator 12 by the ECU 7, the operation state of each brake device 8, 9, 10, 11 is controlled, and the braking force of the vehicle Ve generated by each wheel 1, 2, 3, 4 is individually controlled. Can be automatically controlled.
- the ECU 7 receives detection signals from various sensors in each part of the vehicle Ve and information signals from various in-vehicle devices.
- an accelerator sensor 13 that detects an accelerator depression angle (or depression amount or accelerator opening)
- a brake sensor 14 that detects a brake depression angle (or depression amount)
- a steering angle sensor 15 that detects a steering angle of a steering wheel.
- a wheel speed sensor 16 for detecting the rotational speed of each drive wheel 1, 2, 3, 4 respectively
- a longitudinal acceleration sensor 17 for detecting acceleration in the longitudinal direction (vertical direction in FIG. 1) of the vehicle Ve, and an axle of the vehicle Ve Detection from a lateral acceleration sensor 18 that detects acceleration in the direction (left-right direction in FIG. 1), a yaw rate sensor 19 that detects the yaw rate of the vehicle Ve, or a torque sensor (not shown) that detects output torque of the engine 5
- a signal is input to the ECU 7.
- the control device is configured to improve the turning performance of the vehicle Ve by improving the steering characteristics during turning.
- the vehicle speed and the friction coefficient of the road surface are estimated from the wheel speeds of the wheels 1, 2, 3, and 4 detected by the wheel speed sensor 16, and the vehicle speed, the road surface friction coefficient,
- the target steering characteristic of the vehicle Ve is set based on the steering angle detected by the steering angle sensor 15 and the like.
- the actual steering characteristics of the vehicle Ve are controlled so as to follow the target steering characteristics set in this way.
- the actual steering characteristic of the vehicle Ve is changed to the target steering characteristic.
- the target yaw rate of the vehicle Ve at that time is obtained based on information such as the vehicle speed, the steering angle, and the wheel base.
- the actual yaw rate of the vehicle Ve is controlled so as to approach the target yaw rate.
- the yaw rate of the vehicle Ve can be controlled by adjusting the driving torque applied to the driving wheels 3 and 4 or the braking torque applied to the wheels 1, 2, 3 and 4 by the correction torque. .
- Japanese Patent Application Laid-Open No. 5-278488 describes a control technique for controlling the driving force of driving wheels so that the vehicle stability factor follows a target value.
- Japanese Patent Application Laid-Open No. 2011-218953 describes a control technique for controlling the driving force of driving wheels so that the steering characteristic of a vehicle follows the target steering characteristic.
- the basic control contents of the turning performance improvement control that stabilizes the behavior and posture of the vehicle during turning by automatically controlling the driving force of the vehicle are well known by each of the above-mentioned patent documents. A more specific description is omitted here.
- the vehicle control apparatus performs the shift control of the automatic transmission 6 when the turning improvement control is executed on the vehicle Ve on which the automatic transmission 6 is mounted.
- An applied shift execution condition that is, a shift map is temporarily changed.
- FIG. 2 is a flowchart for explaining an example of the control, and the routine shown in this flowchart is repeatedly executed every predetermined short time.
- step S1 it is determined whether or not driving force control is being executed in order to improve turning performance. For example, it is possible to determine whether or not the driving force control is being executed by checking whether or not a command for executing the driving force control with a predetermined control amount is output.
- step S1 If the driving force control has not yet been executed, and if a negative determination is made in step S1, this routine is temporarily terminated without executing the subsequent control.
- step S1 if the driving force control is being executed to improve the turning performance, and if a positive determination is made in step S1, the process proceeds to step S2. Then, the control amount of the driving force control, the accelerator opening, the gear position (or gear ratio) set in the automatic transmission 6, the vehicle speed, and the shift execution condition, that is, the shift line (upshift line and downshift) of the shift map. On the basis of the shift line) and the like, the possibility that the shift is executed by the driving force control is calculated. Specifically, a numerical value that quantitatively indicates the possibility that the automatic transmission 6 performs a shift due to a change in the driving force of the vehicle Ve due to the execution of the driving force control is calculated.
- the point O1 is an operating point immediately before the driving force of the vehicle Ve is changed by the driving force control in the turning performance improvement control, and the point A1 is driven by the driving force control.
- the driving point in a state where the force and the vehicle speed are reduced is shown.
- the driving force control is executed to improve the turning performance of the vehicle Ve, the driving force is changed regardless of the driver's accelerator operation. That is, the point A1 indicates an operating state in which the driving force and the vehicle speed are reduced by, for example, reducing the throttle opening of the engine 5 by the driving force control.
- the driving point of the vehicle Ve is changed from the point O1. While moving to A1, the accelerator opening does not change.
- the driver may perform an accelerator operation to compensate for the reduced driving force and vehicle speed. That is, the accelerator may be depressed by the driver, and the accelerator opening may be increased. In this case, there is no particular problem when the amount of change in the accelerator opening by the driver's operation is small, but when the amount of change in the accelerator opening is large, a shift that is not intended by the driver is performed as described above. There is a possibility that.
- the control device calculates the possibility that the automatic transmission 6 is shifted by controlling the driving force in order to improve the turning performance, and the shift is executed.
- the shift execution condition of the automatic transmission 6 specifically, the value of the accelerator operation amount in the shift map is corrected. Therefore, in step S2 described above, the possibility that the automatic transmission 6 can perform a shift due to a change in the driving force by the driving force control is obtained using the accelerator operation amount, that is, the amount of change in the accelerator opening as an index. It is done.
- the change amount ⁇ a1 of the accelerator opening corresponding to the change amount of the driving force by the driving force control is obtained as a numerical value indicating the possibility of executing the shift.
- step S3 it is determined whether or not the shift map needs to be corrected, that is, whether or not the shift line in the shift map needs to be corrected.
- the value indicating the possibility of execution of shift by the driving force control obtained in step S2, that is, the change amount ⁇ a1 of the accelerator opening is a threshold value ⁇ for determining the possibility of execution of shift. It is judged whether it is larger. That is, the threshold value ⁇ is set in order to determine whether or not to correct the shift map according to the magnitude of the accelerator opening change ⁇ a1. For example, as shown in FIG. 3, the shift line closest to the point O1, which is the operating point immediately before the driving force is changed (downshift line in the example of FIG.
- the distance (that is, the difference in accelerator opening) in the vertical axis direction in FIG. 3 can be set as the threshold value ⁇ .
- the change amount ⁇ a1 of the accelerator opening is larger than the threshold value ⁇ , it is determined that the shift is likely to be executed as a result of the driving force control, and the shift map needs to be corrected.
- a shift execution threshold that is, a shift line correction amount is calculated, and the shift map is corrected with the calculated correction amount.
- the shift line of the shift map has a larger accelerator opening.
- the shift line correction amount is calculated so as to move in the direction in which the shift is executed.
- the shift line of the shift map is corrected according to the correction amount calculated in this way.
- the shift line of the shift map is changed in the direction in which the shift is executed with a smaller accelerator opening.
- the correction amount of the shift line is calculated so as to move to.
- the shift line of the shift map is corrected according to the correction amount calculated in this way.
- the accelerator is opened by returning the accelerator in order to reduce the increased driving force or the vehicle speed. May be reduced. Even in such a case, the shift map is corrected in a direction that facilitates determination of shift execution as described above, so that appropriate shift control can always be executed.
- this routine is temporarily terminated without executing the subsequent control. . If the shift map correction as described above is always executed when the driving force control for improving the turning performance is performed, for example, when the driver intentionally operates the accelerator and executes the shift, There is a possibility that the burden on the accelerator operation is increased.
- the shift line in this case the downshift line
- the driver's accelerator operation during the downshift is corrected.
- the burden will increase.
- the shift line is corrected despite the fact that the driver was able to execute the downshift with the accelerator operation amount d1, the operation amount d2 is required for the downshift. You will have to perform the accelerator operation.
- the shift map correction in correcting the shift map as described above, it is determined whether or not the shift can be executed in consideration of the driving state at that time and the control state of the driving force. Is done. Then, when it is determined that the shift is unlikely to be performed, the shift map correction is prohibited. Therefore, unnecessary correction can be avoided and the operation load on the driver can be reduced.
- step S5 another shift execution threshold correction amount for executing the shift by the operation of the driver is calculated, and the other shift execution threshold is corrected by the calculated correction amount.
- the other shift execution threshold value is used to execute a downshift based on the driver's intention by power-on downshift, kickdown, or the like, separately from the shift execution threshold value corresponding to the shift line in the shift map described above.
- the other shift execution threshold values are determined by the amount of change in the accelerator opening or the change speed at the time of the accelerator operation in order to determine whether to perform power-on downshift or whether to perform kickdown. Is set.
- the other shift execution threshold value for determining the execution of the power-on downshift is a direction in which the downshift is hardly executed. It is corrected to.
- another shift execution threshold value for determining execution of kickdown is corrected in a direction in which downshift is difficult to be executed.
- Step S6 it is determined whether or not the driving force control for improving the turning performance is finished. If the determination in step S6 is negative because the driving force control for improving the turning performance has not been completed yet, the determination in step S6 is executed again. That is, the determination in step S6 is repeatedly executed until the driving force control for improving the turning performance is completed.
- step S6 determines whether the determination of step S6 is affirmative due to the completion of the driving force control for improving the turning performance. If the determination of step S6 is affirmative due to the completion of the driving force control for improving the turning performance, the process proceeds to step S7 to execute the shift by correcting the shift execution threshold and operating the driver. Correction of the other shift execution threshold value threshold is terminated. That is, the shift execution threshold and other shift execution thresholds are returned to the normal state before the driving force control for improving the turning performance is executed. Thereafter, this routine is once terminated.
- the control device for the vehicle Ve when the vehicle Ve turns, the drive performance of the vehicle Ve is automatically controlled to stabilize the vehicle behavior during the turn. Is executed. Specifically, when the turning performance improvement control by the control device of the present invention is executed for the vehicle Ve on which the automatic transmission 6 is mounted as described above, the conditions for executing the shift of the automatic transmission 6 are as follows. Temporarily changed.
- the conditions for executing the shift of the automatic transmission 6 are determined using the vehicle speed and the accelerator operation amount by the driver as parameters. Therefore, when the turning performance improvement control is executed, the value of the accelerator operation amount is corrected. For example, when the driving force of the vehicle Ve is reduced by the turning performance improvement control, the value of the accelerator operation amount is corrected so as to increase. That is, the conditions for executing the shift are temporarily changed so that a larger accelerator operation is required to execute the shift. Alternatively, when the driving force of the vehicle Ve is increased by the turning performance improvement control, the value of the accelerator operation amount is corrected so as to decrease. That is, the conditions for executing the shift are temporarily changed so that the shift is executed with a smaller accelerator operation.
- the functional means for executing step S2 corresponds to the “shift possibility determination means” in the present invention.
- the functional means for executing steps S3, S4, S5 corresponds to the “shift condition correcting means” in the present invention.
- the control device of the present invention is applied to a vehicle Ve equipped with a stepped automatic transmission 6.
- the present invention is not limited to the specific examples described above, and the control device according to the present invention is capable of improving the turning performance of the vehicle Ve even when a continuously variable transmission is used as the automatic transmission 6.
- the shift control of the automatic transmission 6 can be appropriately executed without interfering with each other.
- the shift control of the continuously variable transmission is executed using a shift map using parameters such as a vehicle speed, an engine speed, and an accelerator operation amount (accelerator opening).
- the control device of the present invention executes the turning performance improvement control for such a continuously variable transmission map as in the case of controlling the stepped automatic transmission 6 described above. In this case, the value of the accelerator operation amount in the shift map can be corrected.
- the accelerator operation amount or the corresponding physical quantity value in the shift map of the continuously variable transmission increases, that is, The shift map of the continuously variable transmission is corrected in a direction in which shifting is difficult to be performed. Therefore, even when the control device of the present invention is applied to a vehicle Ve equipped with a continuously variable transmission, the turning performance improvement control and the transmission control of the continuously variable transmission are appropriately executed without interfering with each other. be able to.
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Abstract
Description
Claims (10)
- 車速および運転者のアクセル操作量により決まる変速実行閾値を含む変速実行条件に基づいて自動変速機の変速制御を実行する変速手段と、
旋回走行時に駆動力を制御して車両挙動を安定させる旋回性向上制御を実行する駆動力制御手段とを備えた、駆動力源と駆動輪との間に設けられた自動変速機を有する車両の制御装置において、
前記旋回性向上制御が実行される場合に、前記変速実行条件における前記アクセル操作量の値を補正する変速条件補正手段を備えていることを特徴とする。 - 前記変速条件補正手段は、前記旋回性向上制御により前記駆動力が低減される場合は、前記アクセル操作量の値を前記アクセル操作量が増大する方向に補正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。
- 前記変速条件補正手段は、前記旋回性向上制御により前記駆動力が増大される場合は、前記アクセル操作量の値を前記アクセル操作量が低下する方向に補正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。
- 前記旋回性向上制御による前記駆動力の変化量もしくは前記駆動力の変化量に相当する前記アクセル操作量に対して、前記車両の運転状態が前記変速実行条件を満たすことにより前記自動変速機で変速が実行される可能性を判断するための閾値を設定する変速可能性判断手段を更に備え、
前記変速条件補正手段は、前記駆動力の変化量もしくはそれに相当する前記アクセル操作量が前記閾値よりも小さい場合に、前記補正を禁止する手段を含むことを特徴とする請求項1から3のいずれかに記載の車両の制御装置。 - 前記変速可能性判断手段は、前記車両の運転状態が前記変速実行条件を満たすために必要な前記アクセル操作量の変化量を前記閾値として設定する手段を含むことを特徴とする請求項4に記載の車両の制御装置。
- 前記変速手段は、前記アクセル操作量もしくはアクセル操作速度に対して前記変速実行条件とは別の他の変速実行閾値を設定するとともに、前記アクセル操作量もしくは前記アクセル操作速度が前記他の変速実行閾値よりも大きい場合に、前記自動変速機でダウンシフトを実行する手段を含み、
前記変速条件補正手段は、前記旋回性向上制御が実行される場合に、前記他の変速実行閾値を前記ダウンシフトが実行され難くなる方向に補正する手段を含む
ことを特徴とする請求項1から5のいずれかに記載の車両の制御装置。 - 前記閾値は実際の運転点と現状の変速実行閾値との差に基づいて設定されることを特徴とする請求項5に記載の車両の制御装置。
- 前記変速条件補正手段は、前記旋回性向上制御により前記駆動力が低減される場合は、より大きなアクセル操作量により変速が実行される方向に前記アクセル操作量の値を補正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。
- 前記変速条件補正手段は、前記旋回性向上制御により前記駆動力が増大される場合は、より小さなアクセル操作量により変速が実行される方向に前記アクセル操作量の値を補正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。
- 前記変速実行条件は変速マップを含み、
前記変速実行閾値は前記変速マップにおける変速線を含む、ことを特徴とする請求項1から9にいずれかに記載の車両の制御装置。
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US14/428,676 US9290175B2 (en) | 2012-09-19 | 2013-09-06 | Vehicle control system |
DE112013004571.0T DE112013004571T5 (de) | 2012-09-19 | 2013-09-06 | Fahrzeugsteuersystem |
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JP6645471B2 (ja) * | 2017-04-18 | 2020-02-14 | トヨタ自動車株式会社 | 車両の駆動力制御装置 |
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US9290175B2 (en) | 2016-03-22 |
US20150239469A1 (en) | 2015-08-27 |
JP2014059023A (ja) | 2014-04-03 |
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