PURPOSE: To prevent a noise, which is produced when high pressure oil remaining in a liquid passage at the completion of an acceleration slip control flows into a master cylinder, from being generated.
CONSTITUTION: An electromagnetic opening/closing valve 154 is arranged between a master cylinder 114 and a wheel cylinder 118. An opening/closing valve 168 is arranged in a communicating passage, which connects a line between the electromagnetic opening/closing valve 154 and the wheel cylinder 118 to a discharging passage through which liquid pressure is returned from the wheel cylinder 118 to a reservoir 120. With this, since the opening/closing valve 168 is kept open for a prescribed time after the completion of acceleration slip control, the remaining pressure within a liquid passage can be discharged to the reservoir (120) side.
TANIMOTO KOJI
KATSUKURA TOYOHARU
NIPPON DENSO CO