| 摘要 |
A pneumatic brake booster with a booster housing part includes a vacuum chamber and a working chamber separated therefrom by a movable wall, and a valve body part including a control valve assembly and an electromagnet assembly. The control valve assembly can be actuated both by an actuation rod as well as by the electromagnet assembly, in order to make connections between the vacuum chamber and the working chamber, or between the working chamber and the ambient atmosphere. To improve the heat dissipation and to simplify the assembly the valve body part comprises several separate portions at least the first portion of the valve body part being at least partially designed as a magnetic return of the electromagnet assembly and is coupled with the second portion of the valve body part.
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