| 摘要 |
A pneumatic brake booster for motor vehicles includes a booster housing, subdivided into at least one working chamber and at least one vacuum chamber by at least one axially movable wall to which a pneumatic differential pressure can be applied, a control valve controlling the differential pressure and arranged in a control housing to connect the working chamber to the vacuum chamber or atmosphere, the valve having two concentrically arranged sealing seats and an elastically deformable valve member, an operable input member connected to a valve piston whose movement is limited by a transverse member that can be introduced in a radial direction into the control housing, an elastic reaction element, an output member applying a boosting force to a master cylinder, and ventilating and bleeding ducts in the control housing.
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