Patent ID: 6467390
Filing Date: 2002-10-22
Classification: B60T

Abstract:
Brake force booster with a panic braking function for automotive vehicles, comprising:a booster housing, the inside of which is subdivided by a movable wall into a first chamber and a second chamber, a control housing wherein a control valve is arranged which controls a pneumatic pressure difference that acts upon the movable wall and is operable by means of an actuating rod, wherein the control valve includes a first sealing seat, a second sealing seat provided on a valve piston as well as an elastic valve member that interacts with both sealing seats, a means for ensuring an abrupt rise of the boosting force raised by the brake force booster when the control valve is activated quickly, the first sealing seat is arranged movably in relation to the control housing, and a means for fixing the sealing seat in position when a predetermined relative displacement between valve piston and control housing is exceeded such that the means permits a movement of the sealing seat in opposition to the actuating direction relative to the control housing.