Fluid pressure control device for antiskid brake system

Details Fluid pressure control device for antiskid brake system Fluid pressure control device for antiskid brake system

1995-10-06

1997-02-11

Graham, Matthew C.

Fluid-pressure and analogous brake systems

Speed-controlled

Having a valve system responsive to a wheel lock signal

3031162, B60T 836

Patent

active

056013442

ABSTRACT:
A brake fluid pressure adjustment device is presented for controlling the wheel lock of a vehicle by controlling the flow of the brake fluid from the main fluid path to the bypass path by means of a pumping mechanism which is in constant operation. The pumping mechanism includes a suction valve which only allows a unidirectional flow of brake fluid from the pump, and a reservoir to the pump; an electromagnetic device which forces open the bypass path between the pump and the reservoir by attracting the bypass path control valve element in one direction; and a discharge valve which allows only the flow of brake fluid from the pump to the main fluid path. Therefore, by controlling the actions of the electromagnetic means, it is possible to control the decrease, holding and increase actions of the pressure adjustment device, without stopping and starting the pump. The device thereby provides a delicate and timely response to the brake pressure variation needs without being affected by the inertial effects of the pump.

REFERENCES:
patent: 3865440 (1975-02-01), Ostwald
patent: 4436348 (1984-03-01), Farr
patent: 4844558 (1989-07-01), Ishii et al.

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