| 摘要 |
PROBLEM TO BE SOLVED: To restrain degradation of operation feeling of a brake pedal at least while a vehicle is at a stop on a slope. SOLUTION: A brake actuator 50 has a first master cutoff valve 52A and a second master cutoff valve 52B. While a vehicle where the brake actuator 50 is mounted is at a stop on a downgrade slope, the first master cutoff valve 52A and the second master cutoff valve 52B are opened for releasing the brake force of the vehicle to lower the brake fluid pressure in pipes between the valves and brake force generating means 41FL, 41FR, 41RL, 41RR. Under this constitution, a speed to lower the brake fluid pressure is decreased as the slope becomes larger. COPYRIGHT: (C)2010,JPO&INPIT
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