Anti-locking brake system with a switchable orifice control valv

Details Anti-locking brake system with a switchable orifice control valv Anti-locking brake system with a switchable orifice control valv

1995-08-29

1997-10-28

Graham, Matthew C.

Fluid-pressure and analogous brake systems

Speed-controlled

Having a valve system responsive to a wheel lock signal

303900, 25112915, B60T 848

Patent

active

056810989

ABSTRACT:
An anti-lock brake system having a switchable orifice control valve disposed between the master brake cylinder and the brake assembly. The switchable orifice control valve, having a valve body, a stationary member, a movable member and a solenoid coil actuated armature. The switchable orifice control valve has a normally open state, a closed state and a third state during an anti-lock mode of operation. In the third state the brake fluid from the master brake cylinder to the brake assembly flows through a calibrated re-apply orifice which controls the rate at which the pressure of the fluid being applied to the brake assembly is increased at a predetermined rate. The switchable orifice control valve is held in the third state by a pressure differential orifice between the input and output ports of the switchable orifice control valve.

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patent: 5364067 (1994-11-01), Linkner, Jr.
patent: 5393132 (1995-02-01), Yogo et al.

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