Brake pressure regulator for an hydraulic vehicle braking system

Details Brake pressure regulator for an hydraulic vehicle braking system Brake pressure regulator for an hydraulic vehicle braking system

1983-06-16

1985-04-16

Stoner, Jr., Bruce H.

Fluid-pressure and analogous brake systems

Multiple fluid-receiving devices

Multiple motors

188349, B60T 826

Patent

active

045111855

ABSTRACT:
A brake pressure regulator for an hydraulic vehicle braking system. A first inlet chamber (14) and an outlet chamber (20) for a first brake circuit (HzI-RzI) are defined by piston surfaces of different sizes of a stepped piston (30) which controls a valve (40) disposed in a connection between these two chambers (14, 20). The pressure in a second inlet chamber (24) adapted to be connected to a second brake circuit (HzII-RzII) acts on an annular control piston (50) which is acted upon in opposite direction by a spring (60). The control piston (50) surrounds the stepped piston (30) without contacting the same and is sealed radially inwardly against a plug (16) which is inserted in the housing (10) and which in turn surrounds the stepped piston (30) in sealing fashion. When as switching pressure in both brake circuits (HzI-RzI, HzII-RzII) is surpassed, the stepped piston (30), aided by the control piston (50), adopts a position at which the valve (40) closes. Subsequently, the stepped piston ( 30) sealed by only two sealings (32 and 38) reciprocates, against little frictional resistance, between positions in which alternatingly it opens and closes the valve (40), thereby causing a pressure rise in rear wheel brake cylinders (RzI) in circuit at a reduced ratio in comparison with the pressure rise in front wheel brake cylinders (RzII).

REFERENCES:
patent: 3669505 (1972-06-01), Falk

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