Regenerative braking and torque converter control
AssigneeFord Global Technologies, LLC
InventorsZhengyu Dai, Yanan Zhao, Felix Nedorezov, Mark S. Yamazaki, Philip J. Wiethe, JR.
Life of this patent
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Abstract
A method for controlling vehicle regenerative braking includes decreasing regenerative braking, provided a converter clutch is locked, such that regenerative braking torque reaches zero before a converter clutch opens due to vehicle speed reaching a reference speed; decreasing regenerative braking, provided the converter clutch is scheduled to open, such that regenerative braking torque reaches zero before the converter clutch opens due to vehicle speed reaching the reference speed; and braking the vehicle using wheel brakes.
Claims17
A method for controlling regenerative braking, comprising:
- (a) using wheel brake torque and regenerative braking torque to brake a vehicle;
- (b) decreasing regenerative braking torque during a period at a rate set such that regenerative braking torque reaches zero before a converter clutch opens;
- (c) increasing wheel brake torque as regenerative braking torque decreases.
A method for controlling vehicle regenerative braking, comprising:
- (a) decreasing regenerative braking, provided a converter clutch is locked, such that regenerative braking torque reaches zero before a converter clutch opens due to vehicle speed reaching a reference speed;
- (b) decreasing regenerative braking, provided the converter clutch is scheduled to open, such that regenerative braking torque reaches zero before the converter clutch opens due to vehicle speed reaching the reference speed.
A method for controlling vehicle regenerative braking, comprising:
- using wheel brake torque and regenerative braking torque to brake a vehicle;
- predicting a period that shall have expired before a converter clutch opens;
- establishing a rate of reduction of regenerative braking torque that shall occur during said period such that regenerative braking torque shall be zero at an end of said period;
- and
- decreasing regenerative braking torque at said rate during said period.
Dependencies are inferred from the claim text.