| 摘要 |
PURPOSE:To damp kick-back in reincreasing pressure and improve operating feeling of a brake pedal by providing a throttle in series in a return circuit having a check valve to limit a flow path. CONSTITUTION:Between a first oil path 4 and third oil paths 6, 6' is provided return circuits 15, 15' for circulating working oil from wheel cylinders 3, 3' to a master cylinder 1 bypassing electromagnetic valves 8, 8' and a change-over valve 7 through check valves 16, 16'. In the return circuits 15, 15' are provided throttles 17, 17' for limiting flow path in series to the check valves 16, 16'. And in braking, the respective electromagnetic valves 8, 8' are set to positions b, b' or c, c' by control signals from an antiskid control unit to hold or reduce braking pressure. Also, when the valves 8, 8' are set to positions a, a' to increase again pressure, the working oil reserved in a damper 14 is circulated to the master cylinder 1 through the return circuits 15, 15' and limited by throttles 17, 17' so that kick-back is damped to increase again effectively pressure. |
