Hydraulic brake control assembly responsive to vehicular deceler

Details Hydraulic brake control assembly responsive to vehicular deceler Hydraulic brake control assembly responsive to vehicular deceler

1977-11-02

1979-02-27

Blix, Trygve M.

Fluid-pressure and analogous brake systems

Inertia control

303 24F, B60T 814

Patent

active

041415965

ABSTRACT:
An improved hydraulic brake control assembly for automotive vehicles having a proportioning valve for regulating the hydraulic pressure applied to the rear wheel brakes from a master brake cylinder in accordance with vehicular load. A control device responsive to vehicular deceleration and hydraulic pressure from the master brake cylinder controls the proportioning valve by a slidable piston of the control device applying an urging force on the proportioning valve varied in response to the hydraulic pressure applied to the slidable piston. The hydraulic pressure from the master brake cylinder applied to the slidable piston is modified by first valve, a second pressure-sensitive valve and an orifice. The first valve controls admission of the hydraulic pressure to the slidable piston in response to predetermined vehicular deceleration, the orifice and the second valve being in parallel, the hydraulic pressure normally being supplied to the slidable piston through the orifice. The normally-closed second valve is opened when a predetermined hydraulic pressure difference is reached on opposing sides of the orifice for supplying the hydraulic pressure to the slidable piston without pressure throttling by the orifice. The proportioning valve therefore operates to provide a proper hydraulic pressure to the rear wheel brakes in accordance with different vehicular loads and braking applications.

REFERENCES:
patent: 3944293 (1976-03-01), Ishigami

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