Vacuum servo unit for a vehicle braking system

Details Vacuum servo unit for a vehicle braking system Vacuum servo unit for a vehicle braking system

1996-07-12

1998-12-08

Nguyen, Hoang

Motors: expansible chamber type

Working member position feedback to motive fluid control

Follower type

F15B 910

Patent

active

058455582

ABSTRACT:
A vacuum servo unit has a housing, a movable wall member, a constant pressure chamber, a variable pressure chamber, a movable power piston, an input member, an output member, a control member, an operation member for applying an axial propulsion on the output member when electric power is supplied thereto, a first input rod connected to a brake operation member, a second input rod, an electric switch member provided on either the first input rod or the second input rod, a switch operate member changing the state of the electric switch member according to a movement of the first input rod against the second input rod. Accordingly, when a driver returns a brake operation member in the condition that the operation member is applying the axial propulsion on the output member, a first input rod is pulled back. Therefore, the first input rod moves respectively to the second input rod, which changes a state of an electric switch member.

REFERENCES:
patent: 4756231 (1988-07-01), Kobayashi et al.
patent: 5178441 (1993-01-01), Heibel et al.
patent: 5207770 (1993-05-01), Fecher
patent: 5460074 (1995-10-01), Balz et al.
patent: 5479844 (1996-01-01), Heibel et al.
patent: 5493949 (1996-02-01), Castel et al.
patent: 5556173 (1996-09-01), Steiner et al.
SAE 950761, Rath et al., "Effective Active Safety to Reduce Road Accidents", pp. 35-42, 1995 SAE International Congress and Exposition (No Date).

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