| 摘要 |
PURPOSE: A brake device of a vehicle is provided to give friction to some part of a rear tire and the surface by passing the compressed air through the inner part of a cylinder formed with the compressed air and moving a piston. CONSTITUTION: In stepping a pedal a certain depth during the movement of a vehicle, the air of the compressed air is flowed into a cylinder via a nozzle(2). An air dam blocks a groove inside a piston, and the piston is moved by the pressure of the air. A round(6) obtains a rotational force by receiving resistance against a and b, and the rotational force gives a friction force to a certain part of a wheel combined with the round so that the round gives a proper friction force to a and b. In case of a, the round is combined with a certain part of the tire and give resistance to a rear wheel driving device. In case of b, as the round moves on a certain part of a front bumper with a certain force, an event that the vehicle is leaned forward is relieved. Further, the abrasion of the tire is decreased by delaying the damage of the surface and dispersing the friction force as increasing the friction force and the earthing space with the ground.
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