| 摘要 |
PURPOSE: An auxiliary vacuum apparatus for brake system of vehicle is provided to supply optimal negative pressure of a booster by supplementing shortage of negative pressure in a surge tank through supplying dually negative pressure from an inlet manifold added to negative pressure of the surge tank. CONSTITUTION: An auxiliary vacuum apparatus for brake system includes a booster(B); an inlet manifold(I); a surge tank(S); a vacuum line(P) and an auxiliary line(20). The booster is equipped to the inlet manifold of an engine(E). The surge tank produces vacuum between a front end and a rear end of a throttle valve. The surge tank is connected with a brake pedal(BP) by the vacuum line. The auxiliary line combines the inlet manifold and the booster. Therein, negative pressure is increased when negative pressure is dropped by inflowing negative pressure of the inlet manifold through the auxiliary line.
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