Braking control device and control method
AssigneeNissan Motor Co., Ltd.
InventorsKeigo Ajiro, Kensuke Nakamura, Takuya Higuchi
Life of this patent
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Abstract
A hybrid vehicle includes a braking device configured to apply a frictional braking torque to a vehicle wheel in response to movement of an input member of a brake pedal, an electric motor configured to apply a regenerative braking torque to the vehicle wheel, and a control unit. During braking, the control unit is configured to determine a limit value of the regenerative braking torque that can be generated in accordance with an operating condition of the charging device or the electric motor, and reduce a ratio of the regenerative braking torque to the frictional braking torque before the regenerative braking torque reaches the limit value.
Claims6
A braking control device comprising:
- a frictional braking device configured to apply a frictional braking torque to a vehicle wheel in response to movement of an input member of a brake pedal;
- an electric motor configured to apply a regenerative braking torque to the vehicle wheel;
- a charging device configured to be charged with regenerative power generated by the electric motor;
- a detection unit configured to detect a displacement amount of the input member;
- and
- a control unit configured to determine a required braking torque of a driver on the basis of the displacement amount detected by the detection unit, and allocate the required braking torque to the regenerative braking torque and the frictional braking torque,
- wherein the control unit is configured to determine a limit value of the regenerative braking torque that can be generated in accordance with an operating condition of the charging device or the electric motor, and reduce a proportion of the regenerative braking torque in the required braking torque after the detection unit detects the displacement amount of the input member and before the regenerative braking torque reaches the limit value.
A control method for a braking control device having a frictional braking device configured to apply a frictional braking torque to a vehicle wheel in response to movement of an input member of a brake pedal, an electric motor configured to apply a regenerative braking torque to the vehicle wheel, a charging device configured to be charged with regenerative power generated by the electric motor, and a detection unit configured to detect a displacement amount of the input member, comprising:
- determining a required braking torque of a driver on the basis of the displacement amount detected by the detection unit, and allocating the required braking torque to the regenerative braking torque and the frictional braking torque;
- determining a limit value of the regenerative braking torque that can be generated in accordance with an operating condition of the charging device or the electric motor;
- and
- reducing a proportion of the regenerative braking torque in the required braking torque after the detection unit detects the displacement amount of the input member and before the regenerative braking torque reaches the limit value.
Dependencies are inferred from the claim text.