| 摘要 |
Disclosed is a brake booster for a vehicle for making an inside of an uniform pressure chamber be a sufficient vacuum and stabilizing the braking characteristics of a vehicle. The brake booster includes a vacuum tube extended into the uniform pressure chamber and connected to an intake manifold of an engine. A venturi tube having a venturi portion is also installed inside the uniform pressure chamber. A first air suction tube is connected to the venturi portion for sucking out an inner air of the uniform pressure chamber. A second air suction tube is connected to an end of the venturi tube for sucking in the atmospheric air. The air sucked in through the second air suction tube is supplied to the venturi portion, and then a velocity of the air is increased and a pressure of the air is decreased. The vacuum state inside the braked booster can be uniformly maintained irrespective of driving conditions or atmospheric pressure. <IMAGE>
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