Pressure control valve for use in an antilock brake control syst

Details Pressure control valve for use in an antilock brake control syst Pressure control valve for use in an antilock brake control syst

1977-01-24

1979-02-27

Halvosa, George E. A.

Fluid-pressure and analogous brake systems

Speed-controlled

Having a valve system responsive to a wheel lock signal

B60T 804

Patent

active

041415973

ABSTRACT:
In an oil pressure controlled brake system, wherein the brake oil contained within a wheel cylinder is returned to an oil reservoir associated with a master cylinder through an electromagnetic cross valve when the wheel lock or impending lock is detected. The brake system includes a pressure control valve interposed within a feedback loop connecting the electromagnetic cross valve to the oil reservoir. The pressure control valve is so constructed as to suddenly reduce the wheel cylinder pressure to a predetermined value and then gradually reduce the wheel cylinder pressure while the electromagnetic cross valve is energized.

REFERENCES:
patent: 590892 (1897-09-01), Knight
patent: 1788358 (1931-01-01), Goerg
patent: 2623725 (1952-12-01), Sands
patent: 3717385 (1973-02-01), Michellone et al.

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