Patent ID: 6755112
Filing Date: 2004-06-29
Classification: B60T

Abstract:
Vehicle brake system with a pneumatic brake booster comprising an input member being actuated by a vehicle operator and an output member as well as a control housing that carries a movable wall and accommodates a reaction plate at least in part, wherein there is further provision of means for detecting the point of maximum boosting of the pneumatic brake booster that can be used for the actuation of another brake force boosting device,wherein one single switching or sensor means is provided which senses a maximum approach above a switching threshold between the input member of the brake booster representative of the input force, and the movable wall of the brake booster representative of the boosting force, and wherein there is further provision of means to detect the hold time of the maximum approach so that a signal reporting the point of maximum boosting will only be generated after expiry of a predefined time interval during which the maximum approach occurs.