Fluid-pressure and analogous brake systems – Speed-controlled – Having a valve system responsive to a wheel lock signal
Patent
1992-06-22
1993-11-30
Oberleitner, Robert J.
Fluid-pressure and analogous brake systems
Speed-controlled
Having a valve system responsive to a wheel lock signal
303900, B60T 1318
Patent
active
052659488
ABSTRACT:
A known vehicle brake system having an anti-lock system has at least one return pump in this anti-lock system, by means of whose pumping pressure a throttle valve located between the master brake cylinder and the at least one wheel brake can be controlled via a control inlet, during an anti-lock mode, out of the normal position into a throttling position, counter to the force of an opening spring. The throttle valve serves to limit brake pressure rise speeds in the wheel brake during an anti-lock mode. It is disadvantageous that upon termination of such an anti-lock mode, the throttle valve hinders the return flow of pressure fluid out of the wheel brake to the master brake cylinder. Brake pressure reductions are therefore delayed. A throttle valve and connected in accordance with the invention has a second control inlet, which communicates with the wheel brake. The wheel brake pressure, upon termination of braking with anti-lock operation, is used as control pressure for opening the throttle valve, which as a result reaches its normal open position earlier and faster.
REFERENCES:
patent: 3731980 (1973-05-01), Fink et al.
patent: 3866983 (1975-02-01), Kondo
patent: 4099793 (1978-07-01), Iio
patent: 4640558 (1987-02-01), Nomura et al.
patent: 4936637 (1990-06-01), Adachi et al.
Bosch Technische Berichte, English special edition (Feb. 1982), pp. 76,77.
Holzmann Roland
Jonner Wolf-Dieter
Greigg Edwin E.
Greigg Ronald E.
Muratori Alfred
Oberleitner Robert J.
Robert & Bosch GmbH
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