Fluid-pressure and analogous brake systems – Speed-controlled – Having a valve system responsive to a wheel lock signal
Patent
1987-12-01
1989-05-09
Kashnikow, Andres
Fluid-pressure and analogous brake systems
Speed-controlled
Having a valve system responsive to a wheel lock signal
60581, 188356, 303 4, 303 12, B60T 844, B60T 1352
Patent
active
048283371
ABSTRACT:
A brake system for automotive vehicles is disclosed comprising a vacuum brake force booster operatively located between a brake pedal and a master brake cylinder. The vacuum brake force booster includes at least two working chambers separated from one another by a membrane plate, one of the working chambers, through a master magnetic valve, being in communication with a vacuum source and the other working chamber being vented through a control valve acutable by the brake pedal to generate a brake force proportional to the brake pedal force. Connected to the master brake cylinder are brake circuits applying pressure to the wheel brake cylinders. Sensors associated with the wheels detect the rotational behavior of the wheels to identify a locking condition. Output signals are applied to a central electronic regulator supplying, in response to the signals, at least one switch-over signal to the master magnetic valve so that the working chamber in communication with the vacuum source may be connected to atmosphere rather than to the vacuum source. Provided in the vacuum brake force booster is an auxiliary membrane plate fixed to a guide sleeve, separating an additional working chamber in permanent communication with the vacuum source from the vented working chamber. Supported on the guide sleeve, through a spring package, is a piston rod receiving the brake pedal force, while the membrane plate, for generating the brake force, is disposed in a manner displaceable away from the guide sleeve.
REFERENCES:
patent: 3559532 (1971-02-01), MacDuff et al.
patent: 3608982 (1971-09-01), Inada et al.
patent: 4096696 (1978-06-01), Van House
patent: 4330996 (1982-05-01), Becht et al.
patent: 4576004 (1986-03-01), Bach
Schiel Lothar
Wagner Wilfried
Alfred Teves GmbH
Graham Matthew C.
Kashnikow Andres
Raden James B.
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