Fluid-pressure and analogous brake systems – Speed-controlled – Having a valve system responsive to a wheel lock signal
Patent
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.
Hogan Martin A.
Lee Alan J.
Leppek Kevin G.
Spadafora Peter J.
Conkey Howard N.
Delco Electronics Corporation
General Motors Corporation
Muratori Alfred
Oberleitner Robert J.
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