| 摘要 |
The power brake unit comprises a master cylinder, a booster utilizing the pressure difference between a vacuum and atmospheric pressure including a vacuum casing, and a cage-like housing structure embracing the vacuum casing and secured to a splashboard of a vehicle, with the master cylinder and the vacuum casing being secured to the housing structure in an operative relationship. The power brake unit is thereby supported by the housing structure in a manner to substantially reduce the lost travel of the brake pedal due to axial extension of the vacuum casing experienced in prior art arrangements caused by applied braking forces and enables a reduction of weight of the power brake unit since lighter weight materials may be employed in the various components of the power brake unit. |
