| 摘要 |
PROBLEM TO BE SOLVED: To reduce the disturbance of a behavior of a vehicle caused by introducing negative pressure to an oil pressure circuit for supplying oil pressure to a brake. SOLUTION: A vacuum pump is connected to the oil pressure circuit so as to introduce the negative pressure to the oil pressure circuit for supplying the oil pressure to a brake caliper. When the brake pedal is not operated (the brake is turned off) and an accelerator pedal is operated (the accelerator is turned on), the vacuum pump is driven so as to introduce the negative pressure to the oil pressure circuit. When the brake pedal and the accelerator pedal are not operated (the brake is turned on and the accelerator is turned off), the vacuum pump is stopped so as not to introduce the negative pressure to the oil pressure circuit. COPYRIGHT: (C)2011,JPO&INPIT
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