Vehicle brake system having adaptive torque control
AssigneeFord Global Technologies, LLC
InventorJohn Patrick Joyce
Life of this patent
Estimating the term…
Abstract
A vehicle brake system (10) is provided which compensates for brake pedal feel variation so as to provide for enhanced braking feel to the vehicle operator. The brake system (10) includes a brake command input (10), an accelerometer (22) for sensing longitudinal acceleration of the vehicle, and friction brakes (26) and regenerative brakes (29) for generating braking force to be applied to brakes on the vehicle. The vehicle brake system (10) further includes a controller (12) for detecting a brake torque variation as a function of the sensed acceleration and the brake demand signal. The controllers (12) further adjusts a torque command signal to adjust the amount of braking torque generated by the brakes (26) so as to compensate for brake torque variation.
Claims20
A vehicle brake system comprising:
- a brake demand input;
- an accelerometer for sensing longitudinal acceleration of a vehicle;
- a brake actuator for generating braking force to be applied to one or more
- brakes on the vehicle;
- and
- a controller for receiving the brake demand signal and the sensed acceleration and detecting a brake torque variation as a function of the sensed acceleration and brake demand signal, said controller further adjusting a torque command signal to adjust the amount of braking torque generated by the brake actuator so as to compensate for the brake torque variation.
A vehicle brake system comprising:
- a brake demand input;
- an accelerometer for sensing longitudinal acceleration of a vehicle;
- a frictional brake actuator for providing friction braking;
- a regenerative brake actuator for providing regenerative braking of the vehicle;
- and
- a controller for receiving the brake demand input and the sensed acceleration and detecting a brake torque variation as a function of the sensed acceleration and the brake demand input, said controller further adjusting a torque command signal to adjust the amount of braking torque generated by the brake friction actuator so as to compensate for the brake torque variation.
A method of controlling a brake system in a vehicle to compensate for brake torque variation, said method comprising the steps of:
- receiving a brake demand signal;
- sensing longitudinal acceleration of a vehicle;
- generating braking force to be applied to one or more brakes on the vehicle;
- detecting a brake torque variation as a function of the sensed acceleration and brake demand signal;
- and
- adjusting a torque command signal to adjust the amount of braking torque generated so as to compensate for the brake torque variation.
Dependencies are inferred from the claim text.