Fluid-pressure and analogous brake systems – Speed-controlled – Having a valve system responsive to a wheel lock signal
Patent
1987-01-28
1987-10-27
Kashnikow, Andres
Fluid-pressure and analogous brake systems
Speed-controlled
Having a valve system responsive to a wheel lock signal
60591, 303119, B60T 844, B60T 836, F15B 700
Patent
active
047025310
ABSTRACT:
For the control of a brake-slip controlled brake system the brake pedal force assisted by auxiliary force is transmitted onto a master cylinder (10, 10', 33) and from said onto the wheel brake cylinders via several pressure fluid paths that are adapted to be closed independently of one another. The wheel rotational behavior and the vehicle velocity will be measured with sensors (S1 through S4), the signals will be logically combined, and therefrom control signals will be generated for electromagnetically actuatable directional control valves (15, 16, 17, 19, 35, 36, 37, 42, 43, 52). During control action, the pedal force (F) that is directed to the master cylinder and assisted by auxiliary force will be compensated temporarily by an opposed force, as a result whereof the pressure rise in the master cylinder will be retarded or pressure will even be decreased. During the phase of reduced pressure in the master cylinder, the switching position of the directional control valve (15, 16, 17, 35, 36, 42, 43) which are inserted in the pressure fluid lines (24, 24', 25, 25') leading to the wheel brake cylinders will arrange for the pressure in the wheel brake cylinders to be either maintained constant due to line closure, or to be reduced to the level desired by causing pressure fluid to discharge to the master cylinder (10, 10', 33) through the directional control valves switched to open passage.
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Bosch, Techniscme Berichte, vol. 7, edition 2, p. 87 (1980).
Blum Klaus D.
Kircher Dieter
von Gruenber Hubertus
IT&T Industries, Inc.
Kashnikow Andres
Oberleitner Robert J.
Raden James B.
Seitter Robert P.
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