Actuator for use in an anti-skid system

Details Actuator for use in an anti-skid system Actuator for use in an anti-skid system

1986-03-11

1988-11-01

Reger, Duane A.

Fluid-pressure and analogous brake systems

Speed-controlled

Having a valve system responsive to a wheel lock signal

303113, 303119, B60T 804

Patent

active

047814217

ABSTRACT:
An actuator is disclosed for use in an anti-skid brake system for wheeled vehicles. A first valve is disposed in a pressure line to selectively divide the pressure line into two separate lines. Also included is an electric motor, a pump driven by the electric motor, an accumulator adapted to accumulate fluid pressure generated by the pump, a control piston reciprocating under the fluid pressure to open and close the first valve, a second valve adapted to supply the fluid pressure to the control piston upon normal rolling of wheels so as to move the control piston to a non-operative position while excluding the fluid pressure from the control piston when the wheels are likely to lock up, and a third valve having first and second valves and controlling the fluid pressure to be supplied to a hydraulic chamber in response to depression and release of a brake pedal. In this arrangement, a relief valve is provided in a seat member of the first valve so that when the fluid pressure exceeds a predetermined upper limit, it is opened to introduce hydraulic fluid to a drain line through the second valve.

REFERENCES:
patent: 3722960 (1973-03-01), Von Lowis of Menar
patent: 4036534 (1977-07-01), Kondo et al.
patent: 4526426 (1985-07-01), Sato et al.
patent: 4636010 (1987-01-01), Adachi et al.

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