Fluid pressure control apparatus for antiskid brakes

Details Fluid pressure control apparatus for antiskid brakes Fluid pressure control apparatus for antiskid brakes

1993-02-16

1995-03-14

Oberleitner, Robert J.

Fluid-pressure and analogous brake systems

Speed-controlled

Having a valve system responsive to a wheel lock signal

3031161, 3031191, B60T 800

Patent

active

053971752

ABSTRACT:
The present invention presents an economical fluid pressure control device particularly applicable to controlling the fluid pressure in the wheels of an automobile provided with an antiskid capability so that the unpleasant pedal kickbacks are prevented under various operating conditions of the wheels. This is achieved by providing at least two wheel cylinders for one pressure generation source, a reservoir and a pump. A flow valve provided on each of the wheel cylinders is provided with a simple flow switching device which control the position of a spool, disposed inside the flow valve, which assumes a stationary position for non-antiskid operation mode and a operation position for antiskid operation mode. When one of the wheels is in the antiskid operation mode, and the other wheel is in non-antiskid operation mode, the brake fluid discharged from the pump is not allowed to enter the flow valve disposed in the non-antiskid operation mode. Therefore, the fluid pressure pulsations generated in the fluid circuit in the antiskid operation mode are not transmitted back to the pressure generation source through the flow valve in the non-antiskid operation mode. Therefore, there in no transmission of unpleasant pedal kickbacks at the pressure generation source.

REFERENCES:
patent: 4715666 (1987-12-01), Farr
patent: 4846535 (1989-07-01), Kuwana et al.
patent: 4915459 (1990-04-01), Hashida et al.
patent: 4988148 (1991-01-01), Farr et al.

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