Brake booster

Details Brake booster Brake booster

1985-11-21

1987-06-23

Reger, Duane A.

Fluid-pressure and analogous brake systems

Speed-controlled

Having a valve system responsive to a wheel lock signal

303 95, B60T 810

Patent

active

046748059

ABSTRACT:
A brake booster, combined with an anti-skid apparatus for a master brake cylinder. The brake booster is controlled by a brake valve and has a first booster piston displaceable by a brake pedal via a tappet for emergency braking and hydraulically pressurizable for braking with brake boosting, and a second booster pinion, which is only hydraulically displaceable. With normal braking, both booster pistons operate simultaneously. In case of skidding the first booster piston is hydraulically fixed in its operative position during a first, low brake pressure reduction and the second booster piston is relieved of boost pressure and performs reductions in brake pressure. If these are not sufficient, the first booster piston is also displaced in the direction of its initial position. Whereby the first booster piston pressures against the tappet via a spring mounted between it and the tappet which, in turn, acts on the brake pedal. Dependent on the magnitude of the reduction in the brake pressure during the second brake pressure reduction, the displacements of the first booster piston are more or less and act via the spring on the brake pedal with greater or lesser force.

REFERENCES:
patent: 4346942 (1982-08-01), Leiber
patent: 4354714 (1982-10-01), Belart
patent: 4603918 (1986-08-01), Leiber et al.

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