Brake control using proportional plus integral slip regulation a

Fluid-pressure and analogous brake systems – Speed-controlled – Pressure reapply control

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303139, B60T 866

Patent

active

061619078

ABSTRACT:
A brake control system determines when a wheel is unstable or stable during a braking condition. An unstable wheel is determined when the wheel speed is different from the estimated vehicle speed by greater than a fixed amount. When the wheel is determined to be unstable, an amount of brake pressure reduction is determined according to a proportional-plus-integral compensation. The proportional-plus-integral compensation is a function of the difference between the wheel speed and the estimated vehicle speed, as well as a wheel deceleration value. When the wheel is determined to be stable, brake pressure is applied according to an exponential rate. A hold mode is entered when the wheel is determined to be no longer decelerating during a dump cycle.

REFERENCES:
patent: 3883187 (1975-05-01), Carp et al.
patent: 3967862 (1976-07-01), Hunter et al.
patent: 4783127 (1988-11-01), Kade et al.
patent: 5265946 (1993-11-01), Bader
patent: 5492394 (1996-02-01), Kusano et al.
patent: 5618088 (1997-04-01), Roll et al.

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