Patent ID: 6044750
Filing Date: 2000-04-04
Classification: B60T

Abstract:
A brake booster for a vehicle brake system comprisinga housing which is divided, by means of at least one movable wall (14), into a vacuum chamber and a working chamber,a control valve arrangement, which optionally connects the working chamber to atmospheric pressure or to a vacuum, comprising a control valve housing which is connected to said movable wall (14) for joint relative movement with respect to the housing, andan electromagnetic actuation unit which is received in the control valve housing and which comprises a solenoid coil, a magnet armature operating against a spring bias and which magnet armature is rigidly coupled to a first valve seat of the control valve arrangement, and an armature counter-element,characterized in that an insert made of diamagnetic and preferably lightweight material extends through the armature counter-element, said insert forming a guide for an actuating piston and protruding somewhat out of the armature counter-element in the direction of the magnet armature.