Vacuum brake booster for motor vehicles
AssigneeITT Automotive Europe GmbH
InventorWilfried Wagner
Life of this patent
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Abstract
In order to minimize the vacuum-dependent force component acting upon the valve body of a vacuum brake booster that is equipped with a pneumatically pressure-compensated control valve without requiring constructive modifications of the valve gear casing that accommodates the control valve, the invention includes a radially inner limit as well as the radially outer limit of a pressure compensation chamber in the valve gear casing, which is limited by the valve body, is formed by a guide part that guides the valve body.
Claims8
Vacuum brake booster for motor vehicles, including a booster housing, an interior of which is divided into a vacuum chamber and a work chamber by means of a movable wall, and a control valve that controls a differential pressure acting upon said movable wall and which is arranged in a valve gear casing that carries said movable wall, comprising:
- concentric radially inner and outer annular sealing seats arranged on said control valve;
- a pneumatic chamber in said valve gear casing which is fluidly connected to said work chamber;
- and an annular valve body guided in a guide part, wherein said guide part is arranged in said valve gear casing in a sealed fashion;
- and wherein said guide part forms radially inner and outer surfaces of said pneumatic chamber, and said annular valve body forms a portion of said pneumatic chamber.
Dependencies are inferred from the claim text.