| 摘要 |
<P>PROBLEM TO BE SOLVED: To increase the assignment proportion of a regeneration braking force to a target braking force in response to a braking operation force when the braking operation force is in a low region, and at the same time, to reduce the effect delayed feeling of the brake at the time of a sudden braking. <P>SOLUTION: When the braking operation force is in the low region, the boosting ratio of a booster becomes lower, and the assignment ratio of the regeneration braking force to the target braking force which is set to correspond to the braking operation force becomes higher, and an energy efficiency is increased. When the braking operation force exceeds the low region, the boosting ratio of the booster becomes higher, and an increasing ratio of a fundamental hydraulic pressure which is fed to a wheel cylinder from a master cylinder becomes larger. Therefore, even if a small delay occurs in the feeding of a control hydraulic pressure from the control hydraulic pressure braking force generating device at the time of a sudden braking, the braking means can generate a sufficiently large fundamental hydraulic pressure braking force on wheels. <P>COPYRIGHT: (C)2006,JPO&NCIPI |
