Vehicle brake oil-pressure control valve device

Details Vehicle brake oil-pressure control valve device Vehicle brake oil-pressure control valve device

1980-03-07

1981-04-14

Butler, Douglas C.

Fluid-pressure and analogous brake systems

Multiple fluid-receiving devices

Multiple motors

303 24A, 303 24F, B60T 1306

Patent

active

042616239

ABSTRACT:
A brake oil-pressure control valve device for vehicles in which operating oil pressure of rear wheel brakes is automatically controlled in accordance with the braking force as required. The device comprises first and second branch oil passages branched from an oil passage connected to a rear wheel brake output port of a master cylinder, a reducing valve interposed between the first branch oil passage and the rear wheel brakes, springs for determining pressure to start reducing action of the reducing valve, a control piston disposed in an oil pressure chamber communicated with the second branch oil passage to normally hold the reducing valve in its open position, and a weight valve disposed within the valve chamber to sense deceleration of the vehicle.

REFERENCES:
patent: 3455609 (1969-07-01), Bratten
patent: 3922020 (1975-11-01), Koike et al.

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