| 摘要 |
PURPOSE:To prevent the protective operation of a protective circuit during a time when proper braking force works even when a wheel skids and conduct protective operation positively when skidding is continued regardless of the no-working of braking force. CONSTITUTION:The exhaust time and supply time of compressed air are measured by counters 12, 13 from the supply command signal 8a and exhaust command signal 8b of compressed air, the supply time is subtracted from the exhaust time, and protective operation is conducted as an abnormal state when the result of the subtraction reaches a set value or more, when exhaust is conducted for the time longer than supply, braking pressure is lowered largely and skidding is continued though braking force does not work. |
