Antilock brake system with motor current control of the pressure

Details Antilock brake system with motor current control of the pressure Antilock brake system with motor current control of the pressure

1990-12-03

1992-04-07

Oberleitner, Robert J.

Fluid-pressure and analogous brake systems

Speed-controlled

Having a valve system responsive to a wheel lock signal

303DIG4, 36442602, B60T 842, G06G 748

Patent

active

051022079

ABSTRACT:
The period of an initial apply motor current in each apply phase of an antilock brake pressure cycle in a motor driven pressure modulator antilock braking system is adaptively controlled following a sensed recovery from an incipient wheel lockup condition to establish substantially a steady state condition relationship between current and pressure before motor current is ramped to ramp brake pressure. The period of the initial apply motor current is made a function of the amount of pressure decrease during a prior release phase portion of the antilock brake cycle to account for the greater increase in brake pressure to the initial reapply value.

REFERENCES:
patent: 4750124 (1988-06-01), Lin et al.
patent: 4755946 (1988-07-01), Lin
patent: 4783127 (1988-11-01), Kade et al.
patent: 4807134 (1989-02-01), Agarwal et al.
patent: 4835695 (1989-05-01), Walenty et al.
patent: 4881784 (1989-11-01), Leppek
patent: 4917445 (1990-04-01), Leppek et al.

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