Actuating unit for a hydraulic brake system for automotive vehic

Details Actuating unit for a hydraulic brake system for automotive vehic Actuating unit for a hydraulic brake system for automotive vehic

1992-09-03

1994-06-28

Look, Edward K.

Motors: expansible chamber type

Working member position feedback to motive fluid control

Follower type

913693, 91375R, F15B 910

Patent

active

053236858

ABSTRACT:
An actuating unit for a hydraulic brake system for automotive vehicles for shortening the actuating travel of the brake power booster to pre-charge the brake system. The actuating unit includes a master cylinder and a pneumatic brake power booster connected upstream thereof. A first sealing seat (10) of a control valve (9) of the brake power booster (1), which control valve is arranged in a control housing (8), is designed separately of the control housing (8) to be slidable within limits in relation thereto. The first sealing seat (10) is held on a stop (18) on the booster housing during a predefinable actuating stroke of the control housing (8) and, respectively, of a movable wall (5) generating the boosting force. After the required actuating travel of the brake power booster, the first sealing seat (10) is carried away from the stop (18) which causes a connection between the working chamber (7) and the vacuum chamber (6).

REFERENCES:
patent: 3387455 (1968-06-01), Eggstein
patent: 4587885 (1986-05-01), Boehm et al.
patent: 4633757 (1987-01-01), Kubota
patent: 4693083 (1987-09-01), Reinartz
patent: 4729285 (1988-03-01), Harrison
patent: 4794844 (1989-01-01), Taft
patent: 5040450 (1991-08-01), Jakobi

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