Hydraulic brake system for a vehicle having a pump and a reservo

Details Hydraulic brake system for a vehicle having a pump and a reservo Hydraulic brake system for a vehicle having a pump and a reservo

1995-07-28

1996-07-23

Butler, Douglas C.

Fluid-pressure and analogous brake systems

Speed-controlled

Having a valve system responsive to a wheel lock signal

188352, 3031131, 3031151, 303 10, B60T 840, B60T 1704

Patent

active

055383351

ABSTRACT:
The hydraulic brake system for a vehicle which can perform anti-lock control includes a brake circuit for connecting a master cylinder to wheel brakes, a control valve circuit for decreasing hydraulic brake pressure in the wheel brake by discharging brake fluid from the wheel brake to a reservoir, a plunger pump driven by an electric motor for returning brake fluid from the reservoir to the brake circuit and a slit formed on at least the discharge valve seat or the suction valve seat of the pump unit for evacuating the pump chamber of the plunger pump. The hydraulic brake system can further include a one-way valve which permits communication between the pressure chamber of the pump with the reservoir for evacuation.

REFERENCES:
patent: 4664451 (1987-05-01), Sakaguchi et al.
patent: 4875741 (1989-10-01), Ozawa et al.
patent: 5236253 (1993-08-01), Glasmacher
patent: 5324101 (1994-06-01), Kehl et al.
patent: 5403078 (1995-04-01), Farr
"Toyota Corona FF Coupe" Service Manual, Toyota Automotive Corporation, Aug. 4, 1987, pp. 4-28 through 4-40.

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