| 摘要 |
PURPOSE: A vehicle booster is provided to generate small braking force in the initial braking for the safe reduction of a vehicle and rapidly increase the braking force after a predetermined reduction for reducing the stopping distance. CONSTITUTION: A vehicle booster includes a master cylinder assembly having a piston(B) of which a rear end is formed with a hollow part(C) for receiving an output unit(50) in the axial direction and apart from a valve body(60) by a predetermined distance(G2), wherein the output unit includes a reaction disc(51) secured at a rear end, a first output shaft(52) of which a front end is extended axially, a second output shaft(53) of which a front end(53a) is received in the hollow part to contact the piston and a rear end(53b) is connected to a front end of the first output shaft, and a connection element(54) for flexibly connecting the first and second output shafts to each other.
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