Brake system with hydraulic booster type braking hydraulic press

Details Brake system with hydraulic booster type braking hydraulic press Brake system with hydraulic booster type braking hydraulic press

1986-07-24

1988-02-16

Kashnikow, Andres

Fluid-pressure and analogous brake systems

Pipeless valves

303114, 303119, B60T 888, B60T 844, B60T 850

Patent

active

047251034

ABSTRACT:
A brake system with a hydraulic booster type braking hydraulic pressure generator includes a hydraulic pressure control device for controlling pressure in a first brake channel of a hydraulic pressure source, the control depends on a force exerted on a brake pedal. A hydraulic pressure generating device generates the hydraulic pressure of a second brake channel proportional to the hydraulic pressure in the first brake channel; and a fail-safe fluid chamber is capable of generating fail-safe hydraulic pressure in response to the motion of a piston depending on the force exerted on the brake pedal. A switch valve device is interposed between the fail-safe fluid chamber and a reservoir opens while receiving the hydraulic pressure of the first brake channel during brake application; and a hydraulic cylinder device generates braking hydraulic pressure of the first brake channel by either the hydraulic pressure generated at the fail-safe fluid chamber or the hydraulic pressure of the hydraulic pressure control device. In addition, a first valve of a normally-open type is disposed between the output side of the hydraulic pressure control device and an input chamber formed at one end of the power piston; and a second valve is disposed between the input chamber and a reservoir, with the first and second valves controlled by a signal from a control circuit detecting a skidding state of the wheels of a vehicle.

REFERENCES:
patent: 4027924 (1977-06-01), Kondo
patent: 4050748 (1977-09-01), Belart
patent: 4212501 (1980-07-01), Miyakawa
patent: 4523792 (1985-06-01), Belart

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