Anti-skid apparatus for an automotive vehicle

Details Anti-skid apparatus for an automotive vehicle Anti-skid apparatus for an automotive vehicle

1987-12-17

1988-10-25

Reger, Duane A.

Fluid-pressure and analogous brake systems

Speed-controlled

Having a valve system responsive to a wheel lock signal

303 11, B60T 840

Patent

active

047799358

ABSTRACT:
An anti-skid apparatus for installation in a vehicle braking system having a master cylinder, a wheel brake cylinder and a primary fluid passage connecting the cylinders includes a changeover valve disposed in the primary passage to selectively communicate the wheel brake cylinder with the master cylinder or with a reservoir, and a fluid pump for pumping a brake fluid from the reservoir and returning it to a point of the primary passage between the master cylinder and the changeover valve, via a check valve. The anti-skid apparatus further includes a cut-off valve disposed in the primary passage between the master cylinder and the point where the pumped fluid is returned, and a regulator valve disposed in a recirculation passage for recirculating the pumped fluid to the reservoir. The cut-off valve normally allows a flow of the fluid and inhibits the flow of the fluid when the hydraulic pressure from the master cylinder exceeds the pressure from the wheel brake cylinder by at least a predetermined value. The regulator regulates the pressure of the pumped fluid at a value higher than the pressure from the wheel brake cylinder by a predetermined value.

REFERENCES:
patent: 4618189 (1986-10-01), Nakanishi et al.
patent: 4636010 (1987-01-01), Adachi et al.
patent: 4655509 (1987-04-01), Ando et al.
patent: 4660899 (1987-04-01), Ando et al.
patent: 4708407 (1987-11-01), Maehara
patent: 4715666 (1987-12-01), Farr

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