Brake booster

Details Brake booster Brake booster

1998-07-01

1999-08-31

Lopez, F. Daniel

Motors: expansible chamber type

Working member position feedback to motive fluid control

Follower type

F15B 910

Patent

active

059439386

ABSTRACT:
A rubber damper is disposed between a valve plunger, which forms a valve mechanism of a brake booster, and a plate plunger. An air gap is defined around the outer and the inner periphery of the rubber damper to permit an elastic deformation of the rubber damper. When a brake pedal is further depressed under a servo balance condition, the valve plunger compresses the rubber damper, whereby it is driven forward. This arrangement allows a force of depression required when the brake pedal is further depressed under the servo balance condition to be reduced relative to the force of depression required in a conventional arrangement in which the valve plunger must be driven forward by compressing a reaction disc which is surrounded by an output shaft, a valve body and a valve plunger. As a consequence, the response of the brake booster is improved.

REFERENCES:
patent: 4719842 (1988-01-01), Gautier
patent: 5046398 (1991-09-01), Hamamiya et al.
patent: 5433135 (1995-07-01), Watanabe

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