Vehicle brake pressure proportioning valves

Details Vehicle brake pressure proportioning valves Vehicle brake pressure proportioning valves

1980-12-11

1982-09-28

Reger, Duane A.

Fluid-pressure and analogous brake systems

Inertia control

303 6C, B60T 826

Patent

active

043515703

ABSTRACT:
A vehicle brake pressure proportioning valve has a stepped proportioning plunger movable by brake pressure against a loading spring. A control plunger subject to pressure from an inlet port co-operates with a metering valve associated with the proportioning plunger. For low inlet pressures both plungers move together and there is no significant pressure drop through the valve but at a particular vehicle deceleration a control mass moves to hydraulically lock the control plunger and allow full operation of the metering valve. A control spring acts on the control mass with a force which, at the time of hydraulic locking, varies according to the distance moved by the control plunger and, by inference, the weight of the vehicle.

REFERENCES:
patent: 4219243 (1980-08-01), Hayashida

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