Brake pressure control device for vehicle braking systems

Details Brake pressure control device for vehicle braking systems Brake pressure control device for vehicle braking systems

1984-07-16

1985-12-31

Reger, Duane A.

Fluid-pressure and analogous brake systems

Inertia control

B60T 826

Patent

active

045616990

ABSTRACT:
In a brake pressure control device having an inlet port for connection to a master cylinder and an outlet port for connection to a wheel brake cylinder, a differential piston cooperates with a first annular valve seat arranged in a first passage between the inlet and outlet ports, and an inertia-controlled valve element contained within a valve chamber formed in a second passage between the inlet and outlet ports to cooperate with a second annular valve seat fixed to one end portion of the piston. The one end portion of the piston is formed therein with a passage arranged to permit fluid flow passing through the second valve seat between the valve chamber and the outlet port. In such an arrangement, the valve element rests in place to be spaced from the second valve seat when the deceleration is below a predetermined value, the valve element being engaged with the second valve seat when subjected to the deceleration in excess of the predetermined value, and the piston is displaced against a spring load acting thereto to increase the space between the second valve seat and the valve element before the deceleration reaches the predetermined value under a heavy loaded condition of the vehicle.

REFERENCES:
patent: 4260196 (1981-04-01), Takata
patent: 4351570 (1982-09-01), Young
patent: 4387932 (1982-06-01), Shellhause
patent: 4390213 (1983-06-01), Berisch

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