Regenerative braking control system and method
First Claim
1. A vehicle regenerative braking control system, comprising:
- at least one controller comprising computer instructions stored in non-transitory memory, the at least one controller configured to implement friction braking and regenerative braking responsive to input from at least one of a brake pedal switch and a brake master cylinder pressure sensor as backup inputs causing the at least one controller to implement parallel regenerative braking and friction braking in the absence of a brake pedal angle input signal from a brake pedal angle sensor, the at least one controller configured to receive a brake pedal angle sensor signal from the brake pedal angle sensor including through an initial range of motion of the brake pedal corresponding to traversal of a brake pedal gap, the absence of the brake pedal angle input signal further causing the at least one controller to implement only friction braking during traversal of the brake pedal gap, the at least one controller further configured to apply series regenerative braking during traversal of the brake pedal gap and apply parallel regenerative braking and friction braking following traversal of the brake pedal gap if the brake pedal angle sensor signal is available.
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Accused Products
Abstract
A vehicle regenerative braking control system includes a brake pedal; a brake pedal angle sensor interfacing with the brake pedal; a vehicle braking system interfacing with the brake pedal angle sensor, the vehicle braking system adapted to implement friction braking and regenerative braking responsive to receiving a brake pedal angle input signal from the brake pedal angle sensor; and at least one of a brake pedal switch and a brake master cylinder pressure sensor interfacing with the brake pedal and the vehicle braking system. The vehicle braking system is further adapted to implement friction braking and regenerative braking responsive to input from the at least one of a brake pedal switch and a brake master cylinder pressure sensor in the event that the vehicle braking system does not receive the brake pedal angle input signal from the brake pedal angle sensor. A regenerative braking control method is also disclosed.
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Citations
18 Claims
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1. A vehicle regenerative braking control system, comprising:
at least one controller comprising computer instructions stored in non-transitory memory, the at least one controller configured to implement friction braking and regenerative braking responsive to input from at least one of a brake pedal switch and a brake master cylinder pressure sensor as backup inputs causing the at least one controller to implement parallel regenerative braking and friction braking in the absence of a brake pedal angle input signal from a brake pedal angle sensor, the at least one controller configured to receive a brake pedal angle sensor signal from the brake pedal angle sensor including through an initial range of motion of the brake pedal corresponding to traversal of a brake pedal gap, the absence of the brake pedal angle input signal further causing the at least one controller to implement only friction braking during traversal of the brake pedal gap, the at least one controller further configured to apply series regenerative braking during traversal of the brake pedal gap and apply parallel regenerative braking and friction braking following traversal of the brake pedal gap if the brake pedal angle sensor signal is available. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A regenerative braking control method by least one controller executing programmed instructions stored in non-transitory memory, comprising:
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at least one controller executing programmed instructions stored in non-transitory memory to implement friction braking and regenerative braking responsive to input from at least one of a brake pedal switch and a brake master cylinder pressure sensor as backup inputs causing the at least one controller to implement parallel regenerative braking and friction braking in the absence of a brake pedal angle input signal from a brake pedal angle sensor, the at least one controller configured to receive a brake pedal angle sensor signal from the brake pedal angle sensor including through an initial range of motion of the brake pedal, the at least one controller further configured to initially apply series regenerative braking if the brake pedal angle sensor signal is available; and developing a time-based torque request responsive to obtaining at least one of a brake pedal switch position and a brake master cylinder pressure and prior to performing at least one of parallel regenerative braking and friction braking. - View Dependent Claims (10, 11, 12, 13)
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14. A regenerative braking control method by least one controller executing programmed instructions stored in non-transitory memory, comprising:
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at least one controller executing programmed instructions stored in non-transitory memory to apply friction braking as a vehicle brake pedal traverses a brake pedal gap corresponding to an initial segment of a brake pedal torque range; and performing at least one of parallel regenerative braking and friction braking, after the vehicle brake pedal traverses the brake pedal gap, based upon at least one of a brake pedal switch position and a brake master cylinder pressure as backup inputs causing the at least one controller to implement parallel regenerative braking and friction braking if a brake pedal angle sensor signal is unavailable, the at least one controller configured to receive a brake pedal angle sensor signal from the brake pedal angle sensor including through an initial range of motion of the brake pedal, the at least one controller further configured to initially apply series regenerative braking if the brake pedal angle sensor signal is available; and developing a filtered torque request responsive to obtaining at least one of a brake pedal switch position and a brake master cylinder pressure and prior to performing at least one of parallel regenerative braking and friction braking. - View Dependent Claims (15, 16, 17, 18)
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Specification