Vacuum brake power booster

Details Vacuum brake power booster Vacuum brake power booster

1995-09-19

1997-02-25

Nguyen, Hoang

Motors: expansible chamber type

Working member position feedback to motive fluid control

Follower type

91376R, F15B 910

Patent

active

056050887

ABSTRACT:
A vacuum brake power booster for automotive vehicles includes a booster housing whose interior is subdivided into a vacuum chamber and a working chamber by a moveable wall. A control housing carries the moveable wall and accommodates a control valve which controls a pressure differential acting upon the moveable wall. The control valve has at least two sealing seats cooperating with an elastic valve member and is operable by an actuating rod. One of the sealing seats is operable, irrespective of the actuating rod, by an electromagnet whose armature is in force-transmitting interaction with one of the sealing seats. An electrical switching apparatus is also included, the control signals of which influence the current supply of the electromagnet thereby enabling its deactivation. The switching apparatus are operable by a relative movement between a valve piston and the control housing.

REFERENCES:
patent: 4608825 (1986-05-01), Fontaine
patent: 5096267 (1992-03-01), Volz
patent: 5167180 (1992-12-01), Verbo et al.
patent: 5172964 (1992-12-01), Levrai et al.
patent: 5233904 (1993-08-01), Gautier et al.
patent: 5350224 (1994-09-01), Nell et al.
patent: 5437217 (1995-08-01), Castel et al.
patent: 5460074 (1995-10-01), Balz et al.

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