WO2006083013A1 - 車輌の制駆動力制御装置 - Google Patents
車輌の制駆動力制御装置 Download PDFInfo
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- WO2006083013A1 WO2006083013A1 PCT/JP2006/302213 JP2006302213W WO2006083013A1 WO 2006083013 A1 WO2006083013 A1 WO 2006083013A1 JP 2006302213 W JP2006302213 W JP 2006302213W WO 2006083013 A1 WO2006083013 A1 WO 2006083013A1
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- WO
- WIPO (PCT)
- Prior art keywords
- braking
- driving force
- target
- vehicle
- moment
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Ceased
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Classifications
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T8/00—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force
- B60T8/17—Using electrical or electronic regulation means to control braking
- B60T8/1755—Brake regulation specially adapted to control the stability of the vehicle, e.g. taking into account yaw rate or transverse acceleration in a curve
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W10/00—Conjoint control of vehicle sub-units of different type or different function
- B60W10/04—Conjoint control of vehicle sub-units of different type or different function including control of propulsion units
- B60W10/08—Conjoint control of vehicle sub-units of different type or different function including control of propulsion units including control of electric propulsion units, e.g. motors or generators
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G2800/00—Indexing codes relating to the type of movement or to the condition of the vehicle and to the end result to be achieved by the control action
- B60G2800/01—Attitude or posture control
- B60G2800/016—Yawing condition
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G2800/00—Indexing codes relating to the type of movement or to the condition of the vehicle and to the end result to be achieved by the control action
- B60G2800/90—System Controller type
- B60G2800/92—ABS - Brake Control
- B60G2800/922—EBV - Electronic brake force distribution
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G2800/00—Indexing codes relating to the type of movement or to the condition of the vehicle and to the end result to be achieved by the control action
- B60G2800/90—System Controller type
- B60G2800/95—Automatic Traction or Slip Control [ATC]
- B60G2800/952—Electronic driving torque distribution
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T2270/00—Further aspects of brake control systems not otherwise provided for
- B60T2270/30—ESP control system
- B60T2270/311—Predefined control maps, lookup tables
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W2710/00—Output or target parameters relating to a particular sub-units
- B60W2710/10—Change speed gearings
- B60W2710/105—Output torque
-
- 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
- B60W2720/00—Output or target parameters relating to overall vehicle dynamics
- B60W2720/14—Yaw
-
- 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
- B60W2720/00—Output or target parameters relating to overall vehicle dynamics
- B60W2720/40—Torque distribution
- B60W2720/403—Torque distribution between front and rear axle
Definitions
- the present invention relates to a vehicle braking / driving force control device, and more particularly to a vehicle braking / driving force control device that controls braking / driving force of each wheel.
- the distribution of the driving force of the left and right wheels to give the required moment to the vehicle A driving force control device that controls the vehicle has been known, and the braking force control that controls the braking / driving force and the moment of the vehicle by controlling the braking force of each wheel in order to ensure the running stability of the vehicle.
- Devices are already known. According to such a braking / driving force control device, the running stability of the vehicle can be improved.
- the braking / driving force and momentum of a vehicle can be controlled by controlling the braking / driving force of each wheel, but there is a limit to the braking / driving force that each wheel can generate. In some cases, the braking / driving force or the moment that is applied exceeds the value achievable by controlling the braking / driving force of each wheel. In the conventional braking / driving force control device as described above, this situation is not taken into consideration. However, this point needs to be improved. Disclosure of the invention
- the present invention has been made in view of the above-described situation in the conventional vehicle braking / driving force control device configured to control the braking / driving force and the moment of the vehicle by controlling the braking / driving force of each wheel. Therefore, the main problem of the present invention is that if the braking / driving force or moment required for the vehicle exceeds the value that can be achieved by controlling the braking / driving force of each wheel, the braking / driving force of the vehicle By controlling the braking / driving force of each wheel so that one of the moments is as close as possible to the braking / driving force required for the vehicle or the moment, it is as much as possible within the range of braking / driving forces that each wheel can generate. Achieving the braking / driving force or moment required by the vehicle.
- the main problems described above are based on the braking / driving force applying means for applying braking / driving force to each wheel, the means for detecting the driving operation amount of the occupant, and at least the driving operation amount of the occupant.
- the braking / driving force and moment that the moment of the braking / driving force and the moment of the vehicle that can be achieved by the braking / driving force of each wheel is substantially the same as the target moment are corrected.
- the braking / driving force and the vehicle moment of the vehicle due to the braking / driving force of each wheel are the target braking / driving force and And a control means for controlling the braking / driving force applied to each wheel by the braking / driving force applying means so as to achieve a target moment.
- the target braking / driving force of each wheel cannot be achieved depending on the means for calculating the force and target moment and the braking / driving force of each wheel
- the braking / driving of the vehicle that can be achieved by the braking / driving force of each wheel.
- the target braking / driving force after correcting the braking / driving force and the moment when the braking / driving force of the force and the moment is substantially the same as the value closest to the target braking / driving force.
- a braking / driving force control device for a vehicle characterized by comprising: a control means for controlling the driving force.
- the braking / driving force at which the moment is substantially the same as the target moment and the corrected braking / driving force of each wheel as the target braking / driving force and target moment after correcting the moment.
- the braking / driving force applied to each wheel is controlled by the braking / driving force applying means so that the force and torque are the corrected target braking / driving force and target moment, respectively.
- the braking / driving force of each wheel is controlled so that the vehicle is within the range of braking / driving force that each wheel can generate. You can achieve the momentum required for heels.
- the braking / driving force of the vehicle by the braking / driving force of each wheel and the moment of the target braking / driving force after correction are respectively obtained. Since the braking / driving force applied to each wheel is controlled by the braking / driving force applying means so as to achieve the target moment, the braking / driving force of each wheel is controlled so that the target braking / driving force is achieved as much as possible.
- the braking / driving force required for the vehicle can be achieved as much as possible within the range of braking / driving force that each wheel can generate.
- the target moment when the size of the target moment exceeds a maximum momentum achievable by the braking / driving force of each wheel, the target moment is It is preferable to be configured to be corrected to the value of the maximum moment. According to this configuration, when the target moment exceeds the maximum moment that can be achieved by the braking / driving force of each wheel, the target moment is corrected to the maximum moment value.
- the braking / driving force of each wheel can be controlled to achieve the desired target moment.
- the braking / driving of the vehicle when the magnitude of the target moment is equal to or less than the magnitude of the maximum moment that can be achieved by the braking / driving force of each wheel, the braking / driving of the vehicle is performed.
- a straight line parallel to the coordinate axis of the braking / driving force passing through the reference point indicating the target braking / driving force and the above-mentioned target moment of inertia is viewed in Cartesian coordinates with the force and the moment as coordinate axes.
- the control means controls the vehicle according to the braking / driving force of each wheel, with the intersection close to the reference point as a target point.
- the braking / driving force applied to each wheel is controlled by the braking / driving force applying means so that the force and the moment are the value of the target point.
- the vehicle when the magnitude of the target moment is equal to or less than the magnitude of the maximum moment that can be achieved by the braking / driving force of each wheel, the vehicle is viewed in Cartesian coordinates using the braking / driving force and the moment of the vehicle as coordinate axes.
- the straight line that passes through the reference point indicating the target braking / driving force and the target moment and parallel to the coordinate axis of the braking / driving force indicates the magnitude of the braking / driving force of the vehicle by the braking / driving force of each wheel.
- the target braking / driving power is preferably configured to be corrected to the value of the maximum braking / driving force.
- the target braking / driving force is corrected to the maximum braking / driving force value. Therefore, the braking / driving force of each wheel can be controlled so that the target braking / driving force of the vehicle is achieved as much as possible.
- the braking / driving force applied to each wheel is controlled by the braking / driving force applying means so that the braking / driving force and the moment of the vehicle become the value of the target point.
- the vehicle is expressed in orthogonal coordinates with the braking / driving force and the moment of the vehicle as coordinate axes.
- the straight line that passes through the reference point indicating the target braking / driving force and the target moment and is parallel to the coordinate axis of the moment is the maximum value of the vehicle braking / driving force and the maximum momentum of the vehicle due to the braking / driving force of each wheel.
- the intersection near the reference point is the target point, and the braking / driving force and the moment of the vehicle due to the braking / driving force of each wheel are given to each wheel so that it becomes the target point value. Therefore, it is possible to control the vehicle braking / driving force to the target braking / driving force and to control the vehicle moment to be as close to the target moment as possible. it can.
- the control means includes a determination means for determining which of braking / driving force and moment is to be prioritized based on a traveling state of the vehicle, and a motor.
- the braking / driving force at which the moment of the vehicle's braking / driving power and moment that can be achieved by the braking / driving force of each wheel is substantially the same as the value closest to the target moment. If it is determined that the braking / driving force should be given priority, the braking / driving force and the moment of the vehicle that can be achieved by the braking / driving force of each wheel are determined.
- the braking / driving forces and moments at which the moment is substantially the same as the value closest to the target moment are the target braking / driving force and target moment after the correction.
- the braking / driving force of the vehicle that can be achieved by the braking / driving force of each wheel is substantially equal to the target braking / driving force. Since the braking / driving force and moment that have the same value are the corrected target braking / driving force and target moment, the target braking / driving force or target The braking / driving force of each wheel can be controlled so that the moment is preferentially achieved.
- the means for calculating the target braking / driving force and the target moment of the vehicle stably causes the vehicle to run based on the driving operation amount of the occupant.
- To calculate the target braking / driving force of the vehicle and the target total moment of the vehicle estimate the turning moment due to the lateral force of the wheel based on at least the occupant's driving operation amount, and subtract the turning moment from the target total moment.
- the calculated value is preferably calculated as a target motion moment of the vehicle.
- the target braking / driving force of the vehicle and the target total moment of the vehicle for stably running the vehicle are calculated based on at least the occupant's driving operation amount, and at least the wheel based on the occupant's driving operation amount is calculated.
- the turning moment due to the lateral force of the vehicle is estimated, and the value obtained by subtracting the turning moment from the target total moment is calculated as the target moment of the vehicle. It is possible to accurately calculate the target braking / driving force and target moment of the vehicle to be generated by the braking / driving force of each wheel based on the driving operation amount of the occupant.
- the braking / driving force applying means preferably applies the braking / driving force to each wheel independently of each other. .
- the braking / driving force applying means applies a braking force to each wheel independently of each other and can change the driving force distribution of the left and right wheels. It is preferable to apply a driving force from the driving means common to the left and right wheels to the left and right wheels.
- the means for detecting the occupant's driving operation amount preferably detects the occupant's acceleration / deceleration operation amount and steering operation amount.
- the line indicating the maximum value of the braking / driving force of the vehicle and the maximum value of the moment is the maximum value of the driving force of the vehicle.
- the maximum value of the braking force of the vehicle, the maximum value of the moment of the vehicle in the left turn direction, and the maximum value of the moment of the vehicle in the right turn direction are preferably determined.
- the line indicating the maximum value of the braking / driving force of the vehicle and the magnitude of the moment of inertia depends on the friction coefficient of the road surface. It is preferable that the setting is variable.
- the braking / driving force applying means applies the driving force to each wheel independently of each other and the braking force to each wheel independently of each other. It is preferable to have a means for imparting.
- the braking / driving force applying means includes a driving force applying means common to the left and right wheels, a means for controlling distribution of the driving force between the left and right wheels, It is preferable to have means for applying braking force to the wheels independently of each other.
- the driving force applying means includes a driving force applying means common to the left and right front wheels and a driving force applying means common to the left and right rear wheels. Is preferred.
- the driving force applying means controls the driving force distribution between the left and right front wheels and the left and right rear wheels, and the driving force distribution between the front and rear wheels. It is preferable to have a means, a means for controlling the driving force distribution of the left and right front wheels, and a means for controlling the driving force distribution of the left and right rear wheels.
- the driving force applying means includes an electric motor. It is preferable to include.
- the electric motor preferably performs regenerative braking during braking.
- the target moment of when the magnitude of the target moment is equal to or less than the magnitude of the maximum moment that can be achieved by the braking / driving force of each wheel, It is preferable that the target moment of is set to the same value as the target moment before correction.
- the corrected target braking / driving force after correction is preferably set to the same value as the target braking / driving force before correction.
- the determining means determines which of the braking / driving force and the moment is to be prioritized based on the target braking / driving force and the target moment before correction. It is preferable.
- the judging means is a maximum moment that the magnitude of the target moment before correction can be achieved by the braking / driving force of each wheel. It is preferable to determine that the momentum should be given priority when the size is exceeded.
- the judging means is a magnitude of the maximum braking / driving force that the target braking / driving force before correction can be achieved by the braking / driving force of each wheel. When this is exceeded, it is preferable to determine that the braking / driving force should be given priority.
- the judging means is configured such that the magnitude of the target moment before correction is less than the magnitude of the maximum moment that can be achieved by the braking / driving force of each wheel.
- the magnitude of the target braking / driving force before correction is equal to or greater than the determination reference value, it is preferable to determine that the moment should be prioritized.
- means for calculating the target braking / driving force and target moment of the vehicle is stable based on at least the occupant's driving operation amount. It is preferable to calculate a target longitudinal acceleration and a target short rate of the vehicle for running, and calculate a target braking / driving force and a target total moment of the vehicle based on the target longitudinal acceleration and the target short rate of the vehicle, respectively.
- the control means is configured to control the target of each wheel based on the vehicle target braking / driving power, the vehicle target torque, and the front / rear wheel distribution ratio of the braking / driving force.
- Braking / driving It is preferable to calculate the force and control the braking / driving force applied to each wheel based on the target braking / driving force of each wheel.
- FIG. 1 is a schematic configuration diagram showing a first embodiment of a braking / driving force control device according to the present invention applied to a wheel-in-motor type four-wheel drive vehicle.
- FIG. 2 is an explanatory diagram showing the relationship between the braking / driving force of each wheel, the braking / driving force of the vehicle, and the moment in the first embodiment in various cases.
- FIG. 3 is a flowchart showing a braking / driving force control routine achieved by the driving force control electronic control device in the first embodiment. +
- Fig. 4 is a graph (A) showing the range of vehicle braking / driving force and the moment that can be achieved by controlling the braking / driving force of each wheel in the first embodiment, and the target braking / driving force F vn and vehicle of the vehicle.
- An explanatory diagram showing the procedure for calculating the target braking / driving force F vt of the vehicle and the target moment of inertia Mvt of the vehicle when the target moment Mvn of the vehicle is outside the range achievable by controlling the braking / driving force of each wheel.
- FIG. 5 shows a vehicle braking / driving force control device according to the present invention applied to a four-wheel drive vehicle in which the driving force and regenerative braking force of one motor generator common to all four wheels are distributed and controlled to the front and rear wheels and the left and right wheels. It is a schematic block diagram which shows the 2nd Example of this.
- FIG. 6 is an explanatory diagram showing the relationship between the braking / driving force of each wheel, the braking / driving force of the vehicle, and the momentum in the second embodiment in various cases.
- FIG. 7 is an explanatory diagram showing the relationship between the braking / driving force of each wheel, the braking / driving force of the vehicle, and the moment in the second embodiment in various other cases.
- FIG. 8 is a flowchart showing a braking / driving force control routine achieved by the electronic control for driving force control in the second embodiment.
- Fig. 9 is a graph (A) showing the range of vehicle braking / driving force and the moment that can be achieved by controlling the braking / driving force of each wheel in the second embodiment, and the target braking / driving force F vn and the vehicle target braking / driving force. Explanation of how to calculate the target braking / driving force F vt of the vehicle and the target moment of inertia Mvt of the vehicle when the vehicle target moment Mvn is outside the range achievable by controlling the braking / driving force of each wheel.
- Figure (B) shows the range of target braking / driving force Fvt and vehicle target moment Mvt achievable by controlling the braking / driving force of each wheel in a vehicle where the driving source is provided only on the left and right front wheels or left and right rear wheels. It is explanatory drawing (C).
- FIG. 10 shows a braking / driving force control device for a vehicle according to a third embodiment of the present invention, which is applied to an in-wheel motor type four-wheel drive vehicle and is configured as a modification of the first embodiment.
- 3 is a flowchart showing the main part of a driving force control routine.
- FIG. 1 1 shows the vehicle in the third embodiment when the vehicle target braking / driving force Fvt and the vehicle target moment Mvt are outside the achievable range by controlling the braking / driving force of each wheel.
- FIG. 4B is an explanatory diagram (B) showing the procedure for calculating the target braking / driving force Fvt and the vehicle target moment Mvt.
- Figure 12 is applied to a four-wheel drive vehicle in which the driving force and regenerative braking force of one motor generator common to all four wheels are distributed and controlled to the front and rear wheels and the left and right wheels, and is configured as a modification of the second embodiment.
- 10 is a flow chart showing a main part of a braking / driving force control routine in a fourth embodiment of the braking / driving force control device for a vehicle according to the present invention.
- Figure 13 shows the vehicle target braking / driving force Fvt and vehicle target moment Mvt in the fourth embodiment when they are outside the range achievable by controlling the braking / driving force of each wheel.
- It is explanatory drawing (B) which shows the point of a calculation of the driving force Fvt and the target moment Mvt of a vehicle.
- FIG. 1 is a schematic configuration diagram showing a first embodiment of a vehicle braking / driving force control device according to the present invention applied to an in-wheel motor type four-wheel drive vehicle.
- 10 FL and 10 FR indicate left and right front wheels, which are steered wheels
- 10 0RL and 10 0RR respectively indicate left and right rear wheels, which are non-steered wheels
- Left and right front wheels 1 0FL and 1 0 FR have built-in motor generators 1 2FL and 1 2FR, respectively.
- Left and right front wheels 1 0FL and 1 0FR are motor generators 1 2FL and 1 2 Driven by FR.
- the motor generators 1 2FL and 1 2FR also function as regenerative generators for the left and right front wheels, respectively, and generate regenerative braking force during braking.
- the left and right rear wheels. 10RL and 10RR each have an in-wheel motor Machines 1 2 RL and 1 2 RR are incorporated, and the left and right front wheels 1 O RL and 1 0 RR are driven by motor generators 1 2 RL and 1 2 RR.
- the motor generators 1 2 RL and 1 2 RR also function as left and right rear wheel generators during braking, respectively, and generate regenerative braking force.
- the driving force of the motor generator 1 2 FL to 1 2 RR is detected by the accelerator opening sensor 14 4. Based on the accelerator opening ⁇ as the accelerator pedal depression amount not shown in Fig. 1, the driving force control electronics It is controlled by the control device 16. The regenerative braking force of the motor generators 1 2 FL to 1 2 RR is also controlled by the driving force control electronic control device 16.
- the driving force control electronic control unit 16 includes a microcomputer and a drive circuit.
- the microcomputer includes, for example, a CPU, a ROM, a RAM, and an input / output. And a port device, and these may be of a general configuration connected to each other by a bidirectional common bus. Also, during normal driving, the power charged in the battery not shown in Fig. 1 is supplied to each motor generator 1 2 FL to 1 2 RR through the drive circuit, and each motor generator 1 2 during deceleration braking of the vehicle. Electric power generated by regenerative braking by FL to 12 RR is charged to the battery via the drive circuit.
- the friction braking force of the left and right front wheels 1 0 FL, 1 0 FR and the left and right rear wheels 1 0 RL, 1 0 RR is the corresponding wheel cylinder 2 2 FL, 2 2 FR, by the hydraulic circuit 2 0 of the friction braking device 1 8 It is controlled by controlling the braking pressure of 2 2 RL and 2 2 RR.
- the hydraulic circuit 20 includes a reservoir, an oil pump, various valve devices, etc., and the braking pressure of each wheel cylinder is normally determined by the amount of depression of the brake pedal 24 by the driver and the brake.
- the electronic control device 28 for braking force control is also composed of a microphone mouth converter and a drive circuit.
- the microphone mouth computer is, for example, a CPU, a ROM, a RAM,
- the input / output port device may have a general configuration in which these are connected to each other by a bidirectional common bus.
- the steering angle sensor 3 A signal indicating the steering angle 0 is input from 2 and a signal indicating the vehicle speed V is input from the vehicle speed sensor 3 4. Also for braking force control The electronic control unit 2 8 has a signal indicating the master cylinder pressure P m from the pressure sensor 3 6, the pressure sensor
- the electronic control unit 16 for driving force control and the electronic control unit 28 for braking force control 28 exchange signals with each other as necessary.
- the steering angle sensor 32 detects the steering angle ⁇ with the vehicle turning left as positive.
- the electronic control device for driving force control 16 calculates the target longitudinal acceleration G xt of the vehicle based on the accelerator opening ⁇ and the master cylinder pressure P m which are the acceleration / deceleration operation amount of the driver, and also the steering operation of the driver. Based on the steering angle of 0 and the vehicle speed V, the target vehicle rate y t is calculated in a manner known in the art.
- the driving force control electronic control unit 16 calculates the vehicle slip angle J3 in a manner known in the art, and determines the left and right front wheels based on the vehicle slip angle J3 and the steering angle 0.
- the slip angle ⁇ is calculated, and the vehicle turning torque Ms due to the lateral force of each wheel is calculated based on the slip angle ⁇ .
- the driving force control electronic control unit 16 calculates the value obtained by subtracting the turning moment Ms from the vehicle target total moment Mvnt as the vehicle target moment Mvn by controlling the braking / driving force of each wheel required for the vehicle. .
- the driving force control electronic control device 16 calculates the maximum driving force F vdmax of the vehicle and the maximum braking force F vbmax of the vehicle by the braking / driving force of each wheel based on the friction coefficient / i of the road surface. Based on the friction coefficient ⁇ of the vehicle, calculate the maximum moment Mvlmax in the left turn direction of the vehicle and the maximum moment Mvrmax in the right turn direction of the vehicle due to the braking / driving force of each wheel.
- the maximum driving force F vdmax of the vehicle in the situation where the moment due to the driving force does not act is the braking / driving force F wxf 1 and F wxfr of the left and right front wheels 1 0 FL and 1 0 FR are the maximum driving force F wdf lmax and F This is achieved when the left and right rear wheels 1 O RL and 1 0 RR braking / driving forces F wxrl and F wxrr are the maximum driving forces F wdrlraax and F wdrrmax.
- the maximum braking force F vbmax of the vehicle in a situation where the moment due to the braking / driving force of the wheel does not act on the vehicle is determined by the left and right front wheels 1 0 FL and 1 0 FR
- the braking / driving forces F wxfl and F wxfr are the maximum braking forces F wbflmax and F wbfrmax and This is achieved when the braking / driving forces F wxrl and F wxrr of the left and right rear wheels 1 O RL and 1 O RR are the maximum braking forces F wbrlmax and F wbrrraax.
- the maximum moment Mvlmax in the left turn direction of the vehicle in a situation where the longitudinal force due to the braking / driving force of the wheel does not act on the vehicle is 1 0 FL And 10 RL braking / driving force F wxfl and F wxrl are the maximum braking force F wbflmax and F wbrlmax and the right front and rear wheels are 10 FR and 1 0 RR braking / driving force F wxfr and F wxrr are the maximum driving force Achieved if F wdf rmax and F wdrrma.
- Fig. 2 (C) the maximum moment Mvlmax in the left turn direction of the vehicle in a situation where the longitudinal force due to the braking / driving force of the wheel does not act on the vehicle is 1 0 FL And 10 RL braking / driving force F wxfl and F wxrl are the maximum braking force F wbflmax and F wbrlmax
- the maximum driving force and the maximum braking force of each wheel are determined by the friction coefficient of the road surface / 1.
- the vehicle's counterclockwise direction is positive, between the maximum driving force and braking force of each wheel, between the vehicle's maximum driving force and the vehicle's maximum braking force, There is the following relationship with the maximum moment in the right turn direction of the vehicle.
- the power, maximum vehicle moment Mvlmax in the vehicle's left turn direction, and maximum vehicle moment M vrmax in the vehicle's right turn direction are also determined by the friction coefficient ⁇ of the road surface. wdimax and the like can be estimated.
- the vehicle's braking / driving force F vx is the horizontal axis and the vehicle's momentum Mv is the vertical coordinate.
- Achievable vehicle braking / driving force F vx and vehicle momentum ⁇ is maximum vehicle driving force F vdmax, maximum braking force of vehicle
- the value is within the range of the rhombus quadrilateral 100 determined by the maximum left moment Mvlmax of the vehicle and the maximum moment Mvrmax of the right direction of the vehicle.
- points A to D are points corresponding to A to D in FIG. 2, and the coordinates of points A to D are (F vdmax, 0), (F vbmax, 0), (0, Mvlmax), (0, Mvrmax).
- the quadrilateral 100 becomes smaller as the road friction coefficient ⁇ becomes lower.
- the larger the steering angle is, the greater the lateral force of the left and right front wheels, which are the steered wheels, and the smaller the margin of longitudinal force, the smaller the quadrilateral 100 is, the smaller the steering angle is.
- the electronic control device 16 for controlling the driving force controls the vehicle by controlling the braking / driving force of each wheel.
- the electronic control unit for driving force control 16 can control the target braking / driving by the braking / driving force of each wheel.
- Force Fvn and target moment When determining which of braking / driving force and priority should be prioritized based on Mvn, and when it is determined that priority should be given priority, the vehicle target after correction is made so that the target moment Mvn is achieved as much as possible.
- the target braking / driving force Fvt of the vehicle after correction is adjusted so that the target braking / driving force Fvn is achieved as much as possible.
- the electronic controller for driving force control 16 calculates a value satisfying the above equations 1 to 3 as the target braking / driving force Fwxt ⁇ of each wheel by, for example, the least square method.
- the driving force of each wheel is controlled so that the braking / driving force Fwxi of each wheel becomes the target braking / driving force Fwxti.
- the target braking / driving force Fwxti of each wheel is a negative value and braking force
- the magnitude of the target braking / driving force Fwxti is larger than the maximum regenerative braking force of each wheel
- Each motor generator 1 2 FL ⁇ 1 2 RR is controlled so that the power becomes the maximum regenerative braking force F wxrimax and the regenerative braking force is controlled, and it corresponds to the difference between the target braking / driving force Fwxti and the maximum regenerative braking force Fwxrimax
- step 10 a signal indicating the accelerator opening ⁇ detected by the accelerator opening sensor 14 is read, and in step 20, the above procedure is performed based on the accelerator opening ⁇ .
- the vehicle's target braking / driving force Fvn by controlling the braking / driving force of each wheel required for the vehicle
- the vehicle's target momentum Mvn is calculated.
- step 30 the vehicle's maximum driving force F vdmax, vehicle's maximum braking force F vbmax, and vehicle's maximum braking force F vdmax are determined according to the map or function not shown in the figure based on the friction coefficient of the road surface.
- the maximum moment Mvlmax in the left turn direction and the maximum moment M vrmax in the right turn direction of the vehicle are calculated. That is, the points A to D shown in FIG. 4 are specified.
- step 40 for example, whether or not the absolute value of the target braking / driving force F vn is less than the maximum vehicle driving force F vdmax and the absolute value of the vehicle target moment Mvn is less than or equal to the maximum vehicle moment Mvlmax Therefore, the vehicle target braking / driving force F vn and the vehicle target braking moment M vn are within the range of the quadrilateral 100, and the control of each wheel braking / driving force controls the target braking / driving force F vn and target braking moment.
- a determination is made as to whether or not Mvn can be achieved. If a negative determination is made, the process proceeds to step 60. If an affirmative determination is made, the target system of the vehicle after correction is determined in step 50. After the driving force F vt and the vehicle target moment Mvt are set to the target braking / driving force F vn and the target moment Mvn, respectively, the process proceeds to step 200.
- step 60 it is determined whether or not the absolute value of the target moment Mvn is smaller than the maximum moment Mvlmax of the vehicle. If an affirmative determination is made, the process proceeds to step 80 and a negative determination is made.
- step 70 the target braking / driving force F vt of the corrected vehicle is set to 0 and the corrected vehicle target moment Mvt is set to the maximum moment Mvmax (vehicle maximum moment Mvlmax and After proceeding to Step 2 0 0, set to “Mvrmax”. In this case, the corrected target moment Mvt of the vehicle is set to the maximum moment Mvlmax when the target moment Mvn is positive, and is set to the maximum moment Mvrmax when the target moment Mvn is negative.
- step 80 it is determined whether or not the target braking / driving force F vn is smaller than the reference value F vnc (a negative constant larger than F vbmax). If an affirmative determination is made, step 1 0 Proceed to 0. If a negative determination is made, proceed to step 90.
- step 90 as shown in Fig. 4 (B), a straight line L 1 parallel to the horizontal axis passing through point P I. indicating the target braking / driving force F vn of the vehicle and the target moment of inertia Mvn of the vehicle. If the point Q near the point P 1 is calculated as the target point, and the coordinates of the target point Q are (F vq, Mvq), the corrected vehicle After the target braking / driving force F vt and the vehicle target moment Mvt are set to F vq and Mv n, respectively, the process proceeds to step 200.
- Step 100 it is determined whether or not the target braking / driving force Fvn of the vehicle is smaller than the maximum braking force Fvbmax of the vehicle (the braking force is larger than the maximum braking force Fvbmax). If a negative determination is made, the process proceeds to step 110. If an affirmative determination is made, the process proceeds to step 120. ⁇
- step 1 1 a straight line L2 and a quadrilateral parallel to the vertical axis passing through point P2 indicating the target braking / driving force Fvn of the vehicle and the target moment of inertia Mvn of the vehicle.
- the point R closest to the point P2 among the intersections with 100 outlines is obtained as the target point. If the coordinates of the target point R are (F vr, Mvr), the corrected target braking / driving force Fvt of the vehicle is After the target braking / driving force Fvn is set and the corrected vehicle target moment Mvt is set to Mvr, the routine proceeds to step 200.
- Step 120 the target braking / driving force Fvt of the vehicle after correction is set to the maximum braking force Fvbmax, and the corrected target vehicle moment Mvt is set to 0 before proceeding to Step 200.
- step 200 the target braking / driving force Fvt and the target moment Mvt are achieved as described above based on the target braking / driving force Fvt of the vehicle after correction and the target moment Mvt of the vehicle.
- step 2 10 the target friction braking force Fwbti is calculated as described above, and a signal indicating the target friction braking force Fwbti is output to the braking force control electronic control unit 28, thereby The control electronic control device 28 controls the friction braking force Fwbti of each wheel to become the target friction braking force Fwbti.
- step 220 the motor generators 12FL to 12RR are controlled so that the driving force Fwdi or the regenerative braking force Fwri of each wheel becomes the target driving force Fwdti or the target regenerative braking force Fwrti, respectively.
- the vehicle target braking / driving force Fvn and the vehicle target moment Mvn are calculated in step 20 by controlling the braking / driving force of each wheel required for the vehicle.
- the vehicle's maximum driving force Fvdmax, the vehicle's maximum braking force Fvbmax, the vehicle's maximum left-turning moment Mvlmax, and the vehicle's maximum right-turning moment Mvrmax are calculated.
- step 40 when it is determined that the target braking / driving force F vn and the target moment Mvn cannot be achieved by controlling the braking / driving force of each wheel, steps 60 to 120 are executed. If the absolute value of the target moment Mvn is equal to or greater than the maximum vehicle moment M vlmax, a negative determination is made in step 60 and it is determined that priority should be given to the moment. In this case, the corrected target braking / driving force F vt of the vehicle is set to 0, and the corrected target motor moment Mvt of the corrected vehicle is set to the maximum momentum h Mvmax.
- Step 60 If the absolute value of the target moment Mvn is less than the maximum vehicle moment Mvlmax, an affirmative determination is made in step 60, and if the target braking / driving force F vn is greater than or equal to the reference value F vnc In Step 80, it is determined that the moment is to be given priority, and in Step 90, the corrected target braking / driving force F vt of the vehicle and the target moment Mvt of the vehicle are respectively determined. Set to F vq and Mv n.
- step 80 determines the braking / driving force. Is determined to have priority.
- the target braking / driving force F vn of the vehicle is greater than or equal to the maximum braking force F vbmax of the vehicle, a negative determination is made at step 100, and the corrected target braking / driving of the vehicle is performed at step 110.
- step 100 When the force F vt is set to the target braking / driving force F vn and the corrected vehicle target moment Mvt is set to Mvr, and the vehicle target braking / driving force F vn is smaller than the vehicle maximum braking force F vbmax
- step 120 the corrected vehicle target braking / driving force F vt is set to the maximum braking force F vbmax and the vehicle after correction is corrected.
- the target moment of moment Mvt is set to 0.
- Figure 4 (B) shows the target braking / driving force F vn and the target moment of inertia Fvt and the target moment of inertia Mvt.
- the target braking / driving force F vt and target moment Mvt of the vehicle after correction are set to 0 and the maximum moment Mvmax, respectively, and the target braking / driving force F vn and
- the target moment Mvn is in the range c
- the target driving force F vt and the target moment Mvt are set to F vq and the target moment Mv n respectively
- the target braking / driving force F vn and the target moment Mvn are
- the target braking / driving force F vt and the target moment Mvt are set to the target braking / driving forces F vn and Mvr, respectively.
- the target braking / driving force F vn and the target yo moment Mvn are in the region e, the target braking / driving force F vt and the target yo moment Mvt are set to the maximum braking force F vbmax and 0, respectively.
- the above-mentioned areas a and b are areas where the magnitude of the moment required for the vehicle is large, and the area c is an area where the magnitude of the braking force required for the vehicle is not so large. Is a preferred area.
- Regions d and e are regions where the magnitude of braking force required for the vehicle is large, and therefore these regions are preferably regions where priority is given to braking / driving force.
- the target braking / driving force F vn and the target moment Mvn cannot be achieved by controlling the braking / driving force of each wheel, each wheel required for the vehicle is required.
- the target braking / driving force F vn and the target moment Mvn based on the braking / driving force, it is determined whether to give priority to the braking / driving power or the moment, and when it is determined that the momentum should be given priority, the target
- the target braking / driving force F vt of the vehicle after correction and the target torque Mvt of the vehicle after correction are calculated so that the moment Mvn is achieved, and it is determined that the braking / driving force should be given priority
- the target braking / driving force F vn is The vehicle target braking / driving force F vt and the vehicle target moment Mvt after correction are calculated so that they can be achieved.
- the driving source of each wheel is a motor generator 1 2 FL to 1 2 RR provided on each wheel, and the target braking / driving force F wxti of each wheel is a negative value.
- the braking force is used, so the regenerative braking force by the motor generator 1 2 FL to 1 2 RR is used, so the vehicle is required as much as possible within the range of braking / driving force that each wheel can generate. While achieving the braking / driving force and the moment, the vehicle's kinetic energy can be effectively recovered as electrical energy during braking and deceleration of the vehicle.
- the motor generators 1 2 FL to 1 2 RR are in-wheel motors, but the motor generator may be provided on the vehicle body side, and each wheel drive
- the electric motor as the source may not perform regenerative braking, and the driving source may be a driving source other than the electric motor as long as the driving force of each wheel can be increased or decreased independently of each other.
- the motor generators 1 2 FL to 1 2 RR are provided corresponding to the four wheels.
- this embodiment may be applied to a vehicle in which the drive source is provided only on the left and right front wheels or the left and right rear wheels.
- the quadrangle 100 is represented by 1 in FIG. 0 0 '
- the braking / driving force of the vehicle when the vehicle's left-turning moment and the vehicle's right-turning moment are the maximum values Mvlmax and Mvrmax, respectively. Is a negative value, ie braking force. Even in the case of such a vehicle, the above-described effects can be achieved.
- FIG. 5 shows a vehicle braking / driving force control device according to the present invention applied to a four-wheel drive vehicle in which the driving force and regenerative braking force of one motor generator common to all four wheels are distributed and controlled to the front and rear wheels and the left and right wheels. It is a schematic block diagram which shows the 2nd Example of this.
- the same members as those shown in FIG. 1 are denoted by the same reference numerals as those shown in FIG.
- a motor generator 40 is provided as a common drive source for the left and right front wheels 10 FL, 1 0 FR and the left and right rear wheels 1 0 RL, 1 0 RR.
- the driving force and regenerative braking force of the generator 40 are transmitted to the front wheel propeller shaft 4 4 and the rear wheel propeller shaft 4 6 by a center differential 42 2 capable of controlling the distribution ratio of the front and rear wheels.
- the driving force and regenerative braking force of the front wheel propeller shaft 4 4 are transmitted to the left front wheel axle 5 0 L and the right front wheel axle 5 OR by the front wheel differential 48, which can control the distribution ratio of the left and right front wheels. 1 0 FL and 1.0 FR are driven to rotate. Similarly, the driving force of the rear wheel propeller shaft 4 6 is controlled by the rear wheel differential 5 2 that can control the distribution ratio of the left and right rear wheels.
- the driving force of the motor generator 40 is controlled by the driving force control electronic control device 16 based on the accelerator opening ⁇ detected by the accelerator opening sensor 14, and the regenerative braking force of the motor generator 40 is also the driving force. It is controlled by a control electronic control unit 16.
- the electronic control unit for driving force control 16 controls the front and rear wheel distribution ratio of the driving force and regenerative braking force by the center differential 4 2, and the right and left wheel distribution ratio of the driving force and regenerative braking force by the front wheel differential 48
- the left and right wheel distribution ratios of the driving force and regenerative braking force by the rear wheel differential termination 52 are controlled.
- the driving force control electronic control unit 16 has a target braking / driving force F vn by controlling the braking / driving force of each wheel required for the vehicle, and each required for the vehicle.
- Target vehicle moment Mvn, maximum vehicle driving force F vdmax, maximum vehicle braking force F by controlling wheel braking / driving force vbmax, the maximum vehicle moment Mvlnmx in the left turn direction of the vehicle due to the braking / driving force of each wheel, and the maximum motor moment Mvrmax in the right turn direction of the vehicle are calculated in the same manner as in the first embodiment.
- the maximum driving force of the motor generator 40 is that of each wheel when it is evenly distributed to the left and right front wheels 1 OFR 1 0FR and the left and right rear wheels 1 0RL and 1 0RR. It is assumed that the driving force Fwdi is smaller than the maximum possible longitudinal force that is usually determined by the road friction coefficient /.
- the maximum driving force Fvdmax of the vehicle in the situation where the moment due to the braking / driving force of the wheel does not act on the vehicle is the braking / driving force Fwxfl of the left and right front wheels 10 0FL and 1 OFR.
- Fwxfr are the maximum driving force Fwdflmax and Fwdfrmax when the left and right wheel driving force distribution is equal, and the left and right rear wheels 10RL and 10RR braking / driving force Fwxrl and Fwxrr are the same This is achieved when the maximum driving force is F wdr lmax and F wdrrmax.
- the maximum braking force Fvbmax of the vehicle in a situation where the vehicle moment due to the braking / driving force of the wheel does not act on the vehicle is the braking / driving force of the left and right front wheels 1 0FL and 1 0FR.
- the maximum left moment Mvlmax of the vehicle in the situation where the longitudinal force due to the braking / driving force of the wheel does not act on the vehicle is
- the right and left front wheels 10 FR and 1 ORR braking / driving forces Fwxfr and Fwxrr are the maximum driving forces Fwdfrmax 'and Fwdrrmax', respectively, and their magnitudes are the maximum of the left front and rear wheels 10 FL and 10 RL, respectively. This is achieved when the braking force is equal to the magnitude of F wbflmax and Fwbrlmax.
- the maximum left moment Mvlmax 'of the vehicle in the situation where the braking / driving force of the vehicle is the maximum driving force Fvdmax is 1 0 FL and 10 This is achieved when the braking / driving forces Fwxfl and Fwxrl of RL are 0 and the braking / driving forces Fwxfr and Fwxrr of the right front and rear wheels 10FR and 10RR are the maximum driving forces Fwdflmax 'and Fwdrrjnax', respectively.
- the maximum left moment Mvlmax "of the vehicle in the situation where no driving force is applied to any of the wheels is the value of the right front and rear wheels 10 FR and 10 RR. Braking / driving force
- the vehicle is not subjected to the longitudinal force due to the braking / driving force of the wheels.
- the maximum right moment Mvrmax in the right turn direction of the vehicle in the situation is that the driving force of the left and right wheels is distributed to the left wheel, the left and right wheels 1 OFL and 10 0RL braking / driving force Fwxfl and Fwxrl are the maximum driving force Fwdflmax ' And Fwdrlmax ', which is achieved when the magnitude is equal to the magnitude of the maximum braking forces F wbfrmax and Fwbrrmax of the right front and rear wheels 10 FR and 10 RR, respectively. .
- the maximum moment Mvrmax 'in the right turn direction of the vehicle in the situation where the braking / driving force of the vehicle is the maximum driving force Fvdmax is 1 0 FR and 1 This is achieved when the braking / driving forces Fwxfr and Fwxrr of 0 RR are 0 respectively, and the braking / driving forces Fwxfl and Fwxrl of the left front and rear wheels 1 OFL and 1 ORL are the maximum driving forces Fwdflmax ⁇ and Fwdrlmax '. Furthermore, as shown in Fig.
- the maximum moment Mvrmax "in the right turn direction of the vehicle in the situation where no driving force is applied to any of the wheels is the left front wheel 1 OFL and 1
- the braking / driving forces Fwxfl and Fwxrl of the ORL are 0, respectively
- the braking / driving forces F wxfr and F wxrr of the right front and rear wheels 1 OFR and 10 RR are the maximum braking forces F wbfrmax and F wbrrmax.
- the maximum driving force Fwdiraax of each wheel is determined by the maximum output torque of the motor generator 40, the friction coefficient / z of the road surface, and each distribution ratio, and the maximum braking force Fwbimax of each wheel is determined by the friction coefficient ⁇ of the road surface.
- the maximum driving force of the vehicle Fvdraax, the maximum braking force of the vehicle, the maximum motor moment in the left turn direction of the vehicle Mvlmax, the maximum motor moment in the right turn direction of the vehicle Mvrmax is also the maximum output torque of the motor generator 40 and the friction coefficient of the road surface Therefore, if the maximum output torque of the motor generator 40 and the friction coefficient ⁇ of the road surface are known, the maximum driving force Fwdimax of each wheel can be estimated.
- the braking / driving force control of each wheel can be controlled by looking at Cartesian coordinates with the vehicle braking / driving force Fvx as the horizontal axis and the vehicle's normal moment Mv as the vertical axis.
- the vehicle braking / driving force Fvx and the vehicle momentum ⁇ that can be achieved by the vehicle are the maximum vehicle driving force Fvdmax, the vehicle maximum braking force Fvbmax, the vehicle leftward turning maximum momentum Mvlmax, and the vehicle rightward turning maximum Moment Mvrmax, the value within the range of hexagon 104 determined by the variable range of vehicle moment Mv when vehicle braking / driving force Fvx is maximum driving force Fvdmax or maximum braking force Fvbmax.
- points A to H correspond to the cases A to H in FIGS. 6 and 7, respectively.
- the hexagon 104 is smaller as the road friction coefficient is lower. Also, the larger the size of steering ⁇ 0, the greater the lateral force of the left and right front wheels, which is the steering wheel, and the margin of longitudinal force decreases, so the hexagon 104 is larger with a larger steering angle of 0 / J, It will be.
- the maximum driving force and the maximum braking force of each wheel are determined by the road friction coefficient ⁇ , so the vehicle acceleration direction and the vehicle left turn direction Is positive, between the maximum driving force of each wheel and the maximum braking force, between the maximum driving force of the vehicle and the maximum braking force of the vehicle, the maximum moment in the left turn direction of the vehicle and the maximum in the right turn direction of the vehicle. Therefore, the range of vehicle driving force and momentum that can be achieved by the braking / driving force of each wheel is the same as in the first embodiment described above. As in the example, the range is diamond.
- the maximum driving force and braking force of each wheel are determined by the friction coefficient ⁇ of the road surface, so the vehicle acceleration direction and the vehicle's left turn Positive direction, between the maximum driving force and braking force of each wheel, between the maximum driving force of the vehicle and the maximum braking force of the vehicle, the maximum moment of the vehicle in the left turn direction and the right turn direction of the vehicle Therefore, the range of vehicle driving force and moment that can be achieved by the braking / driving force of each wheel is the same as in the first embodiment described above. As in the case of the example of FIG.
- the vehicle's power can be reduced even when all of the maximum driving force of the left and right wheels is distributed to the left or right wheel. Since the driving force is maximized and the braking force of the vehicle is maximized even when all of the maximum braking force of the left and right wheels is distributed to the left or right wheel, this is indicated by the phantom line in Fig. 9 ( ⁇ ). As indicated, the range of vehicle driving force and momentum that can be achieved by the braking / driving force of each wheel is a rectangular range.
- the coordinates of points A to H shown in Fig. 9 are (F vdmax, 0 (F vbmax, 0), (0, Mvlmax), ( F vdmax, KmMvlmax), vbmax, KmMvlmax), (0, Mvrraax) (F vdmax, ⁇ KmMvlmax) ⁇ (F vbmax, ⁇ KraMvlmax) and the braking / driving force of each wheel F wxi 0 ⁇ Kr (1)), and the right and left wheel distribution ratio of braking / driving force F wxi for the front and rear wheels is Ky (0 ⁇ Kr ⁇ 1), and the vehicle tread is
- the electronic control unit 16 for driving force control is used to control the braking / driving of each wheel when the target braking / driving force F vt of the vehicle and the target moment Mvt of the vehicle are within the above hexagonal range 102.
- the target braking / driving force F wxti ( i fl, fr, rl, rr) and left and right wheel distribution ratio Ky.
- the electronic control unit 16 for driving force control is used in the case of the first embodiment described above when the target braking / driving force Fvt of the vehicle and the target moment Mvt of the vehicle are values outside the above hexagonal 102 range.
- the target braking / driving force Fvt of the vehicle after correction and the target braking moment Fvt of the vehicle and the target braking moment Mvt of the vehicle are determined so that the braking / driving force should be prioritized, the target braking / driving force Fvn is as much as possible.
- the driving force control electronic control unit 16 calculates values satisfying the above equations 4 to 7 as the target braking / driving force Fwxti and the left / right wheel distribution ratio Ky of each wheel by, for example, the least square method.
- the electronic control device for driving force control 16 has a vehicle braking / driving force Fv having a positive value and driving force, and each wheel target braking / driving force Fwxti has a positive value and driving force.
- the driving force control electronic control unit 16 calculates the target driving current It and the left / right wheel distribution ratio Ky for the motor generator 40 based on the target driving force Fwdti using a map or function not shown in the figure, By controlling the drive current supplied to the motor generator 40 based on the target drive current 'I ti and controlling the front wheel differential 48 and the rear wheel differential 5 2 based on the left / right wheel distribution ratio Ky, the braking / driving of each wheel is controlled. The driving force of each wheel is controlled so that the force Fwxi becomes the target braking / driving force Fwxti.
- the vehicle braking / driving force Fv is a positive value and driving force
- the target braking / driving force Fwxti of any wheel is a negative value and braking force
- the vehicle braking / driving force Fv Is a negative value and a braking force
- the electronic control unit for driving control 16 will have the target braking / driving force Fwxti Driving force is distributed only to the side where is positive
- the right and left wheel distribution ratio Ky is determined so that the target driving current It for the electric generator 40 is calculated based on the sum of the positive target braking / driving force F wxti and the target braking / driving force F wxti
- a signal indicating the target braking / driving force F wxti is output to the braking force control electronic control device 28 so that the friction braking force by the friction braking device 18 is applied to the wheel having a negative value.
- the driving force control electronic control unit 16 controls the driving current supplied to the motor generator 40 based on the target driving current I ti and the front wheel differential 48 based on the left / right wheel distribution ratio Ky.
- the wheel differential 5 2 is controlled, and the braking force control electronic control device 2 8 applies a friction braking force corresponding to the target braking / driving force F wxti to a wheel having a negative target braking power F wxti.
- the braking / driving force F wxi of each wheel is controlled to become the target braking / driving force F wxti.
- the electronic controller for driving force control 16 sets the target driving force F wdti and the target friction braking force F wbti to 0 for each wheel. Set the target regenerative braking force F wrti to the target braking / driving force F wxti and control the left / right wheel distribution ratio Ky and motor generator 40 so that the regenerative braking force becomes the target regenerative braking force F wrti.
- the electronic controller for driving force control 16 sets the target driving force F wdti of each wheel to 0, and Set the regenerative braking force by machine 40 to the maximum regenerative braking force, and set the left / right wheel distribution ratio Ky so that the distribution ratio of the regenerative braking force to the wheel with the large target braking / driving force F wxti is large.
- the driving force control electronic control unit 16 calculates the target friction braking force F wbti by calculating a value obtained by subtracting the regenerative braking force of the wheel from the target braking / driving force F wxti for each wheel as the target friction braking force F wbti.
- Is output to the braking force control electronic control device 28, and the motor generator 40 is controlled so that the regenerative braking force becomes the maximum regenerative braking force, and the front wheel differential is controlled based on the left / right wheel distribution ratio Iy. 4 8 and rear wheel differential 5 2 are controlled.
- the braking force control electronic control device 28 is based on the target friction braking force F wbti of each wheel input from the driving force control electronic control device 16.
- the braking / driving force control routine in the second embodiment will be described with reference to the flowchart shown in FIG. In FIG. 8, the same steps as those shown in FIG. 3 are assigned the same step numbers as those shown in FIG. Also, the control according to the flowchart shown in FIG. 8 is started when the driving force control electronic control unit 16 is activated, and a predetermined time is required until the ignition switch not shown in the figure is switched off. Repeated every time.
- steps 10 to 80 and steps 200 to 20 are executed in the same manner as in the first embodiment described above, and an affirmative determination is made in step 80. Sometimes go to step 100, but if a negative decision is made, go to step 82.
- step 82 it is determined whether or not the absolute value of the target moment Mvn is smaller than KmMvlmax. If a negative determination is made, the process proceeds to step 84. If an affirmative determination is made, the process proceeds to step 86.
- step 84 as shown in Fig. 9 (B), a straight line L1 parallel to the horizontal axis through the point PI indicating the vehicle target braking / driving force Fvn and the vehicle target moment Mvn is parallel to the horizontal axis.
- the point Q near the point P 1 among the intersection points with the external line DE (line DC or CE) or GH (line segment GF or FH) is determined as the target point, and the coordinates of the target point Q are expressed as (Fvq , Mvq), the target braking / driving force Fvt of the vehicle after correction and the target moment of motor Mvt of the vehicle are set to Fvq and Mvn, respectively, and the process proceeds to step 200.
- step 86 the target of the intersections of the straight line parallel to the horizontal axis passing through the point indicating the vehicle's target braking / driving force Fvn and the vehicle's target momentum Mvn and the hexagonal outline 102 is the target. If the intersection near the point indicating the braking / driving force Fvn and the target moment is obtained as the target point, and the coordinates of the target point are (Fvq, Mvq), the target braking / driving force F vt and the vehicle Proceed to step 200 after the target moment Mvt is set to Fyq and Mvn, respectively.
- step 100 the same determination as in the first embodiment is performed. If an affirmative determination is made, the process proceeds to step 104. If a negative determination is made, the process proceeds to step 102.
- Fig. 9 (B) a straight line L2 parallel to the longitudinal axis passing through the point P2 indicating the vehicle target braking / driving force Fvn and the vehicle target moment Mvn, and the outline CE or HF of the hexagon 102
- the point R nearer to the point P2 is obtained as the target point, and the coordinates of the target point R are (Fvr, M vr), the corrected vehicle target braking / driving force Fvt is set to the target braking / driving force Fvn, and the corrected vehicle target moment Mvt is set to Mvr.
- step 104 the same determination as in step 82 described above is performed. If an affirmative determination is made, the process proceeds to step 108. If a negative determination is made, the determination is made in step 10 & after the correction.
- the vehicle's target braking / driving force Fvt and target moment Mvt are set to Fvbmax and KmM vmax, respectively, and then the process proceeds to step 200.
- the target moment Mvn is a positive value
- the target moment Mvt of the vehicle after correction is set to the maximum moment Mvlmax in the left turn direction
- the target moment Mvn is a negative value
- the corrected vehicle The target moment Mvt is set to the maximum moment Mvrmax in the right turn direction.
- step 210 of the second embodiment the regenerative braking force and the target friction braking force Fwbti of each wheel are calculated as described above, as described above. The same control as in the case is performed.
- the target braking / driving force Fvn and the target moment when the target braking / driving force Fvn and the target moment Mvn cannot be achieved by controlling the braking / driving force of each wheel.
- steps 60 to 108 are executed, so that when the target braking / driving force Fvn and the target moment Mvn are in the region a or b in FIG.
- the target braking / driving force Fvt and the target moment Mvt are set to 0 and the maximum momentum Mvmax, respectively.
- the target braking / driving force Fvt and the target moment Mvt are Fvq Set to the target moment Mvn.
- the corrected target braking / driving force Fvt and the target moment Mvt are set to the target braking / driving forces Fvn and Mvr, respectively.
- the target moment Mvn is in the range e
- the target braking / driving force Fvt and target moment after correction are set to the maximum driving forces Fvdmax and KraMvmax, respectively.
- the corrected target braking / driving force F vt and the target moment of inertia Mvt are set to the maximum braking forces F vbmax and Mvq, respectively.
- the target braking / driving force F vt and the target moment Mvt after the correction are set to the maximum braking forces F vbmax and KmMvmax, respectively.
- the target braking / driving force F vn and the target moment Mvn cannot be achieved by controlling the braking / driving force of each wheel, the target braking / driving force F vn by the braking / driving force of each wheel required for the vehicle And whether the braking / driving force or priority should be given priority based on the target moment Mvn, and if it is determined that priority should be given to the moment, the target vehicle moment Mvn should be achieved as much as possible.
- the target braking / driving force F vn is achieved as much as possible. Since the target braking / driving force F vt of the vehicle after correction and the target moment Mvt of the vehicle are calculated, as in the case of the first embodiment described above, when the turning demand for the vehicle is high, the demand is respected. When the demand for acceleration / deceleration on the vehicle is high, the braking / driving force and momentum required for the vehicle can be achieved as much as possible within the range of braking / driving force that each wheel can generate while respecting the request. .
- the motor generator 40 as a drive source common to each wheel is used when the vehicle target braking / driving force F vt is a negative value and a braking force. Since the regenerative braking force is generated, the braking / driving force and the moment required by the vehicle are achieved as much as possible within the range of the braking / driving force that each wheel can generate, as in the case of the first embodiment described above. In addition, the vehicle's kinetic energy can be effectively recovered as electrical energy during braking and deceleration of the vehicle.
- the target longitudinal acceleration G xt of the vehicle is calculated based on the accelerator opening ⁇ and the master cylinder pressure P m which are the acceleration / deceleration operation amount of the driver, and the driver
- the target vehicle rate is calculated based on the steering angle of 0 and the vehicle speed V
- the target braking / driving force F vn required for the vehicle is calculated based on the vehicle target longitudinal acceleration Gxt.
- the target total moment Mvnt required for the vehicle is calculated.
- the vehicle turning moment Ms due to the lateral force of each wheel is calculated, and the vehicle's target total weight is calculated.
- the value obtained by subtracting the turning moment Ms from the moment Mvnt is calculated as the vehicle target moment Mvn by controlling the braking / driving force of each wheel required for the vehicle. Therefore, the vehicle turning momentum due to the lateral force of the wheel is calculated. It is possible to calculate the target moment of the vehicle by controlling the braking / driving force of each wheel that is required for the vehicle more reliably and accurately than when the moment Ms is not taken into account.
- FIG. 10 shows a third embodiment of the vehicle braking / driving force control device according to the present invention, which is applied to an in-wheel motor type four-wheel drive vehicle and is configured as a modification of the first embodiment.
- 5 is a flowchart showing a main part of a braking / driving force control routine in an example.
- the same step number as that shown in FIG. 3 is assigned to the same step as shown in FIG.
- F vnc a positive constant smaller than F vdmax
- step 100 it is determined whether or not the absolute value of the target braking / driving force F vn of the vehicle is larger than the maximum braking force F vbmax of the vehicle, and when a negative determination is made. Proceed to step 1 1 0, and if an affirmative determination is made, proceed to step 1 2 0.
- step 1 2 the corrected target braking / driving force F vt of the vehicle is set to the maximum braking / driving force F vraax and the corrected vehicle target moment Mvt is set to 0 after the correction.
- the corrected target braking / driving force F vt of the vehicle is set to the maximum driving force F vdmax when the target braking / driving force F vn is a positive value, and is the maximum when the target braking / driving force F vn is a negative value.
- Large braking force F vbmax is set.
- Fourth Embodiment Fig. 12 shows a second embodiment applied to a four-wheel drive vehicle in which the driving force and regenerative braking force of one motor generator common to all four wheels are distributed and controlled to the front and rear and left and right wheels.
- the main part of the braking / driving force control routine in the fourth embodiment of the vehicle braking / driving force control device according to the present invention which is configured as a modified example of the present invention. It is a chart. In FIG. 12, the same step number as that shown in FIG. 8 is assigned to the same step as that shown in FIG. 8.
- steps 80 and 100 are executed in the same way as in the third embodiment described above, and when a negative determination is made in step 100.
- step 100 as shown in Fig. 13, the straight line L 2 and six parallel to the vertical axis passing through the point P 2 indicating the target braking / driving force F vn of the vehicle and the target moment Mvn of the vehicle are shown.
- the point R near the point P2 is calculated as the target point of the intersection with the outline DE (line DC or CE) or GH (line GF or FH) of the square 100.
- the corrected target braking / driving force F vt of the vehicle is set to the target braking / driving force F vn, and the corrected target torque Mvt of the vehicle is set to Mvr. Proceed to step 2 0 0.
- step 104 If an affirmative determination is made in step 104, the target braking / driving force F vn of the vehicle and the target moment Mvn of the vehicle Mvn are not shown in FIG. If the intersection of the straight line parallel to the horizontal axis and the hexagonal outline DG or EH is found as the target point and the coordinates of the target point are (F vq, Mvq), After the target braking / driving force F vt of the vehicle and the target moment Mvt of the vehicle are set to F vq and Mvn, respectively, the process proceeds to step 200.
- the regions ag corresponding to FIG. 9B are as shown in FIG. 13, and in the case of the second embodiment described above.
- the requirements can be satisfied as much as possible in a situation where the driving force required for the vehicle is higher than in the case of the second embodiment described above.
- the reference value F vnc for determining the braking / driving force in step 80 is the same for both the driving force and the braking force. May be set to different values between the driving force and the braking force.
- the drive source is one motor generator 40 common to all four wheels, but it is possible to control the driving force distribution between the left and right wheels.
- the drive source for driving the wheels may be any drive means known in the art, such as an internal combustion engine or a hybrid system.
- one motor generator 40 is provided as a drive source common to the four wheels, but the drive source common to the left and right front wheels and the left and right rear wheels are provided.
- a common drive source may be provided.
- a common drive source is provided only for the left and right front wheels, or a common drive source only for the left and right rear wheels.
- the hexagon 1 0 4 becomes as shown as 1 0 2 'in Fig.
- the regenerative braking force is generated as required by the motor generators 1 2 FL to 1 2 RR and the motor generator 40, respectively.
- the drive source is a motor generator
- the regenerative braking force may not be performed and the braking force may be corrected to be generated only by friction braking.
- the rear wheel distribution ratio Kr of the braking / driving force F wxi of each wheel is constant, but in general, as the steering angle increases,
- the rear wheel distribution ratio Kr is the steering angle so that the rear wheel distribution ratio Kr gradually increases as the steering angle increases because the force increases and the allowable front / rear force of the steering wheel decreases. It may be modified so as to be variably set according to the size of. .
- the rear wheel distribution ratio Kr is the target braking / driving force of the vehicle. It may be modified so as to be variably set according to the target braking / driving force of the vehicle so that it is a negative value and decreases as the size increases.
- the braking / driving force of each wheel is controlled so as to achieve the target braking / driving force F vn as much as possible, and when the moment of the moment should be given priority, each target moment Mvn should be achieved as much as possible.
- the braking / driving force of the wheel may be modified so that the braking / driving force or the moment is prioritized according to the force at which the braking / driving force of the wheel is controlled, for example, the set position of the switch operated by the driver.
- the reference value F vnc is a constant.
- the target control is controlled by controlling the braking / driving force of each wheel required for the vehicle based on the driver's acceleration / deceleration operation amount and the driver's steering operation amount.
- the driving force F vn and the target moment Mvn are calculated, but the target braking / driving force F vn and the target moment Mvn are calculated by the driver if the vehicle behavior is unstable.
- the calculation may be performed by taking into account the target longitudinal acceleration and the target yorate necessary for stabilizing the vehicle behavior.
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- Engineering & Computer Science (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Automation & Control Theory (AREA)
- Regulating Braking Force (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
- Control Of Driving Devices And Active Controlling Of Vehicle (AREA)
Abstract
Description
Claims
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US11/815,268 US8180541B2 (en) | 2005-02-02 | 2006-02-02 | Drive and braking force control device for vehicle |
| DE112006000305.4T DE112006000305B4 (de) | 2005-02-02 | 2006-02-02 | Fahrzeugbrems-/-antriebskraftsteuervorrichtung |
| GB0714668A GB2437036B (en) | 2005-02-02 | 2006-02-02 | Drive and braking force control device for vehicle |
| CN2006800109027A CN101155720B (zh) | 2005-02-02 | 2006-02-02 | 车辆的制动/驱动力控制设备 |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2005-026770 | 2005-02-02 | ||
| JP2005026770A JP4131268B2 (ja) | 2005-02-02 | 2005-02-02 | 車輌の制駆動力制御装置 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2006083013A1 true WO2006083013A1 (ja) | 2006-08-10 |
Family
ID=36777378
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/JP2006/302213 Ceased WO2006083013A1 (ja) | 2005-02-02 | 2006-02-02 | 車輌の制駆動力制御装置 |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US8180541B2 (ja) |
| JP (1) | JP4131268B2 (ja) |
| CN (1) | CN101155720B (ja) |
| DE (1) | DE112006000305B4 (ja) |
| GB (1) | GB2437036B (ja) |
| WO (1) | WO2006083013A1 (ja) |
Families Citing this family (21)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4131270B2 (ja) * | 2005-03-01 | 2008-08-13 | トヨタ自動車株式会社 | 車輌の制駆動力制御装置 |
| US7835836B2 (en) * | 2006-11-08 | 2010-11-16 | Gm Global Technology Operations, Inc. | Methods, systems, and computer program products for calculating a torque overlay command in a steering control system |
| JP4636062B2 (ja) | 2007-08-27 | 2011-02-23 | トヨタ自動車株式会社 | 車両の挙動制御装置 |
| JP5161595B2 (ja) * | 2008-01-28 | 2013-03-13 | 本田技研工業株式会社 | 複数駆動源の駆動力制御装置 |
| JP4958808B2 (ja) * | 2008-01-28 | 2012-06-20 | 本田技研工業株式会社 | 複数駆動源の駆動力制御装置 |
| JP5083025B2 (ja) * | 2008-05-13 | 2012-11-28 | トヨタ自動車株式会社 | 車両の制駆動力制御装置 |
| CN101767535B (zh) * | 2008-12-30 | 2013-08-21 | 比亚迪股份有限公司 | 独立四驱电动汽车的驱动/制动系统及方法 |
| EP2383156B1 (en) | 2009-01-15 | 2016-12-07 | Toyota Jidosha Kabushiki Kaisha | Vehicle stabilization controller |
| CN102083663B (zh) | 2009-07-17 | 2014-05-14 | 丰田自动车株式会社 | 车辆行为控制装置 |
| JP6020097B2 (ja) * | 2012-11-30 | 2016-11-02 | トヨタ自動車株式会社 | 車両の走行制御装置 |
| JP6244809B2 (ja) * | 2013-10-18 | 2017-12-13 | アイシン精機株式会社 | 車両制御装置 |
| KR101558761B1 (ko) * | 2014-04-24 | 2015-10-07 | 현대자동차주식회사 | 차량 거동 안정화 시스템 및 그의 요모멘트 분배 방법 |
| JP6222621B2 (ja) * | 2015-11-06 | 2017-11-01 | マツダ株式会社 | 車両用挙動制御装置 |
| CN105799549B (zh) * | 2016-04-28 | 2019-04-02 | 江苏大学 | 一种用于电动轮汽车eps与dyc集成控制系统及其方法 |
| JP6682355B2 (ja) * | 2016-05-25 | 2020-04-15 | Ntn株式会社 | 車両の旋回制御装置 |
| GB2562281B (en) * | 2017-05-11 | 2022-06-22 | Arrival Ltd | Method and apparatus for controlling a vehicle |
| CN109094536B (zh) * | 2018-08-28 | 2021-01-19 | 潍柴动力股份有限公司 | 一种车辆控制方法及装置、一种车辆 |
| DE102018220576A1 (de) * | 2018-11-29 | 2020-06-04 | Robert Bosch Gmbh | Verfahren und Steuergerät zum Bestimmen eines Reibwertpotentials eines Fahrbahnbelags |
| US11247561B2 (en) * | 2019-04-10 | 2022-02-15 | Akrus Inc. | Systems and methods for controlling driving dynamics in a vehicle |
| DE112022007138T5 (de) * | 2022-04-26 | 2025-02-27 | Gkn Automotive Limited | Antriebssystem |
| DE102024205351A1 (de) * | 2024-06-10 | 2025-12-11 | Robert Bosch Gesellschaft mit beschränkter Haftung | Verfahren zum Regeln von Giermoment-Eingriffen |
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2005
- 2005-02-02 JP JP2005026770A patent/JP4131268B2/ja not_active Expired - Fee Related
-
2006
- 2006-02-02 CN CN2006800109027A patent/CN101155720B/zh not_active Expired - Fee Related
- 2006-02-02 WO PCT/JP2006/302213 patent/WO2006083013A1/ja not_active Ceased
- 2006-02-02 US US11/815,268 patent/US8180541B2/en not_active Expired - Fee Related
- 2006-02-02 DE DE112006000305.4T patent/DE112006000305B4/de not_active Expired - Fee Related
- 2006-02-02 GB GB0714668A patent/GB2437036B/en not_active Expired - Fee Related
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Also Published As
| Publication number | Publication date |
|---|---|
| GB0714668D0 (en) | 2007-09-05 |
| DE112006000305B4 (de) | 2019-04-11 |
| GB2437036B (en) | 2009-06-03 |
| JP4131268B2 (ja) | 2008-08-13 |
| DE112006000305T5 (de) | 2008-04-17 |
| CN101155720A (zh) | 2008-04-02 |
| US20090012685A1 (en) | 2009-01-08 |
| GB2437036A (en) | 2007-10-10 |
| US8180541B2 (en) | 2012-05-15 |
| JP2006213141A (ja) | 2006-08-17 |
| CN101155720B (zh) | 2010-06-16 |
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