Vacuum brake booster with mechanical emergency braking assistance

摘要

A vacuum brake booster (1) having a control valve (6) with a housing (7) workingly coupled to a movable wall (5) is described. For improved braking force assistance during emergency braking operations an armature (18) cooperating with a permanent magnet (19) is provided in the control valve housing (7) and coupled in actuating direction to an actuating element (8). The armature (18) is spring-biased counter to actuating direction. For adjusting the distance between the armature (18) and the permanent magnet (19) in the non-actuated state of the vacuum brake booster (1), the axial position of the permanent magnet (19) relative to the control valve housing (7) and/or the distance between the armature (18) and a valve seat (10) is adjustable.