Fluid-pressure and analogous brake systems – Speed-controlled – With failure responsive means
Patent
1998-10-05
2000-05-16
Butler, Douglas C.
Fluid-pressure and analogous brake systems
Speed-controlled
With failure responsive means
188356, 3031143, 303DIG4, B60T 832, B60T 1718, B60T 1722
Patent
active
060626569
ABSTRACT:
In the case of a brake system for motor vehicles, having a brake pedal, a brake booster, a master brake cylinder and an electronically regulatable brake unit, which is arranged between the master brake cylinder and the wheel brakes and by which, via an electronic control unit, the brake pressure in the wheel brakes can be set independently of the preliminary pressure existing at the output of the master brake cylinder, when the brake booster fails, using the electronic control unit and the electronically regulatable brake unit, the brake pressure in the wheel brakes is generated such that a predetermined minimum desired deceleration course is obtained as a function of the pedal force applied by the driver by way of the brake pedal. The failure of the brake booster is recognized either when no difference is measured between the pressure in the vacuum chamber and the atmospheric pressure, but the pressure at the output of the master brake cylinder is rising or exceeds a predetermined threshold, or when the pressure in the working chamber is at most equal to the pressure in the vacuum chamber, but the pressure at the output of the master brake cylinder is rising or exceeds a predetermined threshold.
REFERENCES:
patent: 3685289 (1972-08-01), Kobashi et al.
patent: 5855420 (1999-01-01), Lawrence
patent: 5967628 (1999-10-01), Abe et al.
ATZ Automobiltechnische Zeitschrift 99, 1997, pp. 134-213 by Von Michael Debes et al. entitled "Dynamische Stabilitaets Control DSC der Baureihe 7 von BMW--Teil 1".
Jakobi Dieter
Kuehberger Johannes
Unterforsthuber Jakob
Bayerische Motoren Werke Aktiengesellschaft
Butler Douglas C.
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