VEHICLE BRAKE SYSTEM HAVING ADAPTIVE TORQUE CONTROL
First Claim
1. 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.
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0 Petitions
Accused Products
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 controller 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.
9 Citations
20 Claims
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1. A vehicle brake system comprising:
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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. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A vehicle brake system comprising:
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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. - View Dependent Claims (9, 10, 11, 12, 13)
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14. A method of controlling a brake system in a vehicle to compensate for brake torque variation, said method comprising the steps of:
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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. - View Dependent Claims (15, 16, 17, 18, 19, 20)
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Specification