Fluid-pressure and analogous brake systems – Speed-controlled – Split coefficient of friction
Reexamination Certificate
2009-09-14
2010-12-07
Schwartz, Christopher P (Department: 3657)
Fluid-pressure and analogous brake systems
Speed-controlled
Split coefficient of friction
C303S192000
Reexamination Certificate
active
07845739
ABSTRACT:
A brake regulation system for motor vehicles is provided with an electronic control unit, by which an automatic parking brake function can be activated in the stationary phase of the motor vehicle and can be deactivated upon reaching a predetermined triggering condition. The control unit can determine in a wheel selective manner the coefficient of friction, or rather the adhesion between the tires and the roadway at the location of the motor vehicle, which is held so as to be stationary by use of the parking brake function. In the presence of different coefficients of friction or adhesion coefficients at the right and left wheel of at least one driven axle, the triggering condition is adapted in the direction of a longer hold of the brake pressure.
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German Search Report dated Feb. 22, 2008 with English translation (nine (9) pages).
International Search Report dated Jul. 7, 2008 with English translation (four (4) pages).
Bayerische Motoren Werke Aktiengesellschaft
Crowell & Moring LLP
Schwartz Christopher P
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