Fluid-pressure and analogous brake systems – Speed-controlled – Having a valve system responsive to a wheel lock signal
Patent
1984-12-11
1987-04-28
Caldwell, Sr., John W.
Fluid-pressure and analogous brake systems
Speed-controlled
Having a valve system responsive to a wheel lock signal
303 97, 364426, B60T 870
Patent
active
046608966
ABSTRACT:
An anti-skid brake control system comprises a detector for detecting the peak value of wheel acceleration in each cycle of skid control. Braking pressure is increased in step-wise fashion by alternately operating a pressure control valve between an application mode in which working fluid is supplied to a wheel cylinder to increase the braking pressure and a hold mode in which the wheel cylinder is blocked from fluid communication to a hydraulic brake circuit to hold the braking pressure constant. The duration for holding the pressure control valve in the application mode is adjusted depending upon the detected peak value of wheel acceleration, whereby an average increasing rate of braking pressure is variable depending upon the peak value of the wheel acceleration.
REFERENCES:
patent: 3637264 (1972-01-01), Leiber et al.
patent: 3847449 (1974-11-01), Adahan
patent: 3901559 (1975-08-01), Iwada
patent: 4384330 (1983-05-01), Matsuda et al.
patent: 4392202 (1983-07-01), Matsuda
patent: 4430714 (1984-02-01), Matsuda et al.
Caldwell Sr. John W.
Nissan Motor Company Limited
Oberley Alvin
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