Brake pressure control device

Details Brake pressure control device Brake pressure control device

1989-07-31

1990-07-10

Butler, Douglas C.

Fluid-pressure and analogous brake systems

Speed-controlled

Having a valve system responsive to a wheel lock signal

303 68, 303119, B60T 832

Patent

active

049402951

ABSTRACT:
A brake pressure control device for use in an anti-skid control system decreases the slipping of a car wheel by reducing the car wheel brake pressure when the slipping of the car wheel against the road surface is excessive at the time of applying a brake pressure to the car wheel brake. The brake pressure control device includes a valve body having a first input port, a second input port, an output port, a spool valve with an annular recess communicating the ports, a spring biasing the spool valve toward a first position, a pressure chamber connected to the output port for applying pressure to the spool to move the spool toward a second portion and an electric coil for applying a force to move the spool toward the first position. Thus, the car wheel brake pressure can be controlled in proportion to the current supplied to the coil.

REFERENCES:
patent: 4668024 (1987-05-01), Nakanishi et al.

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