Hydraulic pressure control valve assembly for automotive hydraul

Details Hydraulic pressure control valve assembly for automotive hydraul Hydraulic pressure control valve assembly for automotive hydraul

1979-04-26

1982-04-20

Reger, Duane A.

Fluid-pressure and analogous brake systems

Inertia control

303 6C, B60T 814, 303

Patent

active

043255825

ABSTRACT:
A hydraulic pressure control valve assembly for a hydraulic brake system for a wheeled vehicle, comprises a proportioning valve having a plunger which is axially movable in a direction against a spring in response to application of a hydraulic pressure to a fluid inlet port to control the magnitude of hydraulic pressure in a fluid outlet port, and a deceleration sensing valve responsive to a deceleration of the vehicle the degree of which exceeds a predetermined value. The deceleration sensing valve has a piston which supports an end of the spring and is sealingly disposed in a chamber to define a sealed expandable chamber which is communicable with the fluid inlet port to enable the expandable chamber to contain a fluid the pressure of which is changeable in accordance with the degree of the deceleration of the vehicle. Biasing means is arranged in the valve assembly to bias the plunger to move axially in the other direction when the magnitude of hydraulic pressure in the sealed expandable chamber exceeds a predetermined value causing the piston to move toward the plunger beyond a predetermined distance against the spring.

REFERENCES:
patent: 3163473 (1964-12-01), Stelzer
patent: 4133584 (1979-01-01), Ohta et al.

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