| 摘要 |
A braking-force booster which contains a pressure source, a pedal operated control valve and at least one main brake cylinder; a piston which creates the brake pressure, is exposed to the pressure created in the main brake cylinder by means of the control valve, wherein the control valve, dependent on the pedal displacement, interrupts a connecting channel between the main brake cylinder and a pressureless connection and temporarily creates a second connecting channel between the pressure source and the main brake cylinder. The pedal operated control valve contains a plunger movable by the pedal which extend into the main brake cylinder, and the first connecting channel is integrated into the main brake cylinder piston. The first plunger has a valve closing member for shutting off this connecting channel during the corresponding approach. Finally, a seat valve is integrated into the first plunger 11 to close the second connecting channel 12, and a second plunger 19, supported on the main brake cylinder piston 3, opens the seat valve 13 at the corresponding approach of the first plunger 11 towards the main brake cylinder piston 3.
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