Combined regenerative and friction braking system for a vehicle
First Claim
1. A method of operating friction and regenerative braking subsystems in a vehicle following the end of an ABS event, wherein a regenerative braking limit for an axle is first set to approximate the total braking torque developed by the friction and regenerative brakes associated with the axle as the ABS event ends, with the regenerative braking torque thereafter being increased, but not decreased, in accord with the total brake torque assigned to that axle according to the driver'"'"'s braking demand and the requirements of balanced braking following the ABS event.
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Accused Products
Abstract
A combined regenerative and friction braking system for the road wheels of a vehicle includes a friction braking subsystem, a regenerative braking subsystem coupled to the road wheels equipped with the friction braking subsystem, and a brake system controller for controlling both the friction and regenerative braking subsystems such that regenerative braking is restored to a maximum practicable value following conclusion of an antilock braking event.
67 Citations
14 Claims
- 1. A method of operating friction and regenerative braking subsystems in a vehicle following the end of an ABS event, wherein a regenerative braking limit for an axle is first set to approximate the total braking torque developed by the friction and regenerative brakes associated with the axle as the ABS event ends, with the regenerative braking torque thereafter being increased, but not decreased, in accord with the total brake torque assigned to that axle according to the driver'"'"'s braking demand and the requirements of balanced braking following the ABS event.
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7. A combined regenerative and friction braking system for road wheels of a vehicle, comprising:
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a friction braking subsystem coupled to a plurality of road wheels;
a regenerative braking subsystem coupled to the road wheels equipped with the friction braking subsystem; and
a brake system controller for controlling both the friction braking subsystem and the regenerative braking subsystem, such that operation in an antilock operating mode will be followed by a period of operation in which the maximum braking torque applied by the regenerative braking subsystem to a particular axle is limited to a level comparable to the maximum brake torque applied by the friction and regenerative braking subsystems as antilock operation ended. - View Dependent Claims (8, 9, 10, 11, 12, 13)
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14. A method for operating friction braking and regenerative braking subsystems for the axle of a vehicle, comprising the steps of:
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operating said friction braking subsystem in an antilock mode;
transitioning from the antilock mode to a mode in which maximum regenerative braking torque is immediately set to a post-ABS limit; and
maintaining the regenerative braking torque at the post-ABS limit until a predetermined time has passed since the end of the antilock mode.
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Specification