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US 2022/0340018 A1Published application
Control Apparatus for Vehicle, Control System for Vehicle, and Control Method for Vehicle
AssigneeHitachi Astemo, Ltd.
InventorsSatoshi KANEKO, Keisuke SUZUKI, Kazuya TAKAHASHI
Life of this patent
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Abstract
A control apparatus for a vehicle includes an addition portion that outputs a post-compensation driver request torque, which is acquired by adding a driving torque (a loss compensation driving torque) lost due to a braking torque provided to a wheel on a low-μ road surface side according to a BLSD request hydraulic pressure calculated by a BLSD request hydraulic pressure calculation processing portion to a driver request torque calculated by a driver request torque calculation processing portion, to a motor.
Claims10
A system comprising:
- a driving source that is configured to provide a driving torque to a driving axle connecting a first driving wheel and a second driving wheel of the vehicle to each other;
- a brake apparatus that is configured to provide braking torques to the first driving wheel and to the second driving wheel individually;
- and
- a control apparatus that is configured to:
- calculate a request driving torque of the vehicle based on an accelerator operation,
- calculate the braking torque provided to the first driving wheel by the brake apparatus on a split road surface on which a frictional coefficient of a road surface where the first driving wheel contacts a ground is lower than a frictional coefficient of a road surface where the second driving wheel contacts the ground,
- calculate a BLSD request hydraulic pressure that acquires a BLSD target wheel speed of the first driving wheel and the second driving wheel,
- output a correction request driving torque to the driving source, the correction request driving torque being acquired by adding a driving torque lost due to the braking torque to the request driving torque,
- limit the correction request driving torque in such a manner that a difference between the request driving torque and a driving torque of the vehicle matches or falls below the driving torque lost due to the braking torque,
- prevent a slip of the first driving wheel by controlling an output torque of the driving source,
- prevent the slip of the first driving wheel by reducing the output torque of the driving source when the slip has occurred on the first driving wheel, wherein
- a slip control torque is calculated based on the correction request driving torque, and
- the lost driving torque is a value acquired by subtracting the driving torque generated due to the control on the output torque of the driving source and the driving torque lost due to the braking torque from the request driving torque.
10 more elements
A control method for a vehicle, the method comprising:
- providing a driving source that is configured to provide a driving torque to a driving axle connecting a first driving wheel and a second driving wheel of the vehicle to each other;
- providing a brake apparatus that is configured to provide braking torques to the first driving wheel and to the second driving wheel individually;
- calculating, using a control apparatus, a request driving torque of the vehicle based on an accelerator operation;
- calculating, using the control apparatus, the braking torque provided to the first driving wheel by the brake apparatus on a split road surface on which a frictional coefficient of a road surface where the first driving wheel contacts a ground is lower than a frictional coefficient of a road surface where the second driving wheel contacts the ground;
- calculating, using the control apparatus, a BLSD request hydraulic pressure that acquires a BLSD target wheel speed of the first driving wheel and the second driving wheel;
- outputting, using the control apparatus, a correction request driving torque to the driving source, the correction request driving torque being acquired by adding a driving torque lost due to the braking torque to the request driving torque;
- limit the correction request driving torque in such a manner that a difference between the request driving torque and a driving torque of the vehicle matches or falls below the driving torque lost due to the braking torque;
- prevent a slip of the first driving wheel by controlling an output torque of the driving source;
- and
- prevent the slip of the first driving wheel by reducing the output torque of the driving source when the slip has occurred on the first driving wheel, wherein
- a slip control torque is calculated based on the correction request driving torque, and
- the lost driving torque is a value acquired by subtracting the driving torque generated due to the control on the output torque of the driving source and the driving torque lost due to the braking torque from the request driving torque.
9 more elements
Dependencies are inferred from the claim text.