| 摘要 |
PROBLEM TO BE SOLVED: To improve brake feeling by keeping a communicating state, until an input hydraulic pressure becomes a value for shortening the dead stroke of the other hydraulic brake, and becomes a second value equal to or larger than a first value. SOLUTION: The hydraulic pressure of a master cylinder exceed the electromagnetic force of a proportional solenoid 31Z, and a plunger piston 311 moves, and a stroke valve opening and closing part Vs closes and a poppet valve opening and closing part Vp opens. As a result of this, the input side of a hydraulic pressure control valve 31 communicates with its output side, and the pressure of each wheel cylinder on a front wheel side and the hydraulic pressure of the master cylinder rise at the same rate. The pressure of each wheel cylinder on the rear wheel side rises at the same rate as the hydraulic pressure of the master cylinder, through a check valve after a point where the front-wheel side wheel cylinder pressure becomes equal to the rear- wheel side wheel cylinder pressure. Accordingly, a current value given from an ECU is reduced or increased according to the variation of a regenerative braking force, and it becomes possible to secure a pedal stroke corresponding to the variation of the regenerative braking force, and to obtain excellent brake feeling always. |
