| 摘要 |
A vehicle brake system of the previously known type has a rear wheel brake booster, between a brake pressure source and an anti-skid apparatus associated with the rear wheels of the vehicle; the brake booster can be switched on by an electrically controllable switchover device. However, switching on of the rear wheel brake booster is effected at the onset of braking only if the anti-skid apparatus is in an operative functional condition. The complex structure of the switchover device in the form of a 3/2-way magnetic valve is a disadvantage. For simplification and economy, the switchover device is provided with an electrically controllable 2/2-way valve and a 2/2-way valve that is mechanically controllable by the stepped piston of the rear wheel brake booster and is built into this brake booster. An electrically controllable 2/2-way valve, which is a component of the anti-skid apparatus, is likewise triggered to activate the rear wheel brake booster.
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