| 摘要 |
PURPOSE: A brake for a fuel cell vehicle is provided to remove a vacuum pump and a vacuum pump switch by operating a brake booster with the negative pressure of the air blower. CONSTITUTION: A brake booster(13) pressurizes a piston of a master cylinder using the difference between the atmospheric pressure and the negative pressure. The break booster is operated with the negative pressure generated from an air blower(172). The break booster comprises a negative pressure line(19) and a relief valve(20). The negative pressure line is connected to an inlet of the air blower. The relief valve is arranged in the negative line to constantly maintain the pressure of the negative pressure line. The pressure sensor is arranged on the negative pressure line. A controller controls the operation of the relief valve according to the sensing signal of the pressure sensor.
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