Fluid-pressure and analogous brake systems – Speed-controlled – Having a valve system responsive to a wheel lock signal
Patent
1988-01-11
1989-04-11
Kashnikow, Andres
Fluid-pressure and analogous brake systems
Speed-controlled
Having a valve system responsive to a wheel lock signal
303114, B60T 832
Patent
active
048199974
ABSTRACT:
A slip-controlled brake system is disclosed having a hydraulic power booster and a master cylinder arranged downstream of the power booster, wherein the pressure chamber of the power booster can be acted upon by an external pressure depending on the position of a pedal-actuatable brake valve, and wherein a fast-fill cylinder is provided which can be acted upon by the dynamic pressure and through which additional pressure fluid can be supplied to the brake circuits of the master cylinder. The fast-fill cylinder is equipped with a three-step bore wherein a piston with three shoulders is longitudinally displaceably arranged. A chamber in front of the large drive surface of the piston is connected to the dynamic brake circuit through a pressure fluid line and a chamber in front of an end face of the small step is connected to a static brake circuit through a second pressure fluid line. A first annular chamber formed between the large shoulder of the piston and the medium-sized step of the stepped bore than communicates with a second annular chamber formed between the medium-sized shoulder of the piston and the small step of the stepped bore through a pressure fluid channel and a valve. The second annular chamber is connected to a return line. In the event of a brake pressure control, additional pressure fluid flows from the chamber in front of the small step of the piston of the fast-fill cylinder into the brake circuit through the pressure fluid line. In this case, the fast-fill cylinder operates independently of the functioning of the anti-lock system.
REFERENCES:
patent: 3677608 (1972-07-01), Lewis
patent: 4395072 (1983-07-01), Belart
patent: 4725103 (1988-02-01), Watanabe
Reinartz Hans D.
Steffes Helmut
Alfred Teves GmbH
Graham Matthew C.
Kashnikow Andres
Raden James B.
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