| 摘要 |
<p>PURPOSE:To prevent a vehicle from spinning and the like by making switch-over as required so as to perform hydraulic pressure control when the time for the condition of decompression or for the condition of the combination of decompression and compression for both front wheels exceeds a specified one. CONSTITUTION:Output signals from wheel speed sensors S1 through S4 are converted into pulses by the interface circuit of an electronic control unit (ECU), pulses are counted and computed by a pulse processing circuit so that the numerical values of them are operated, analyzed and judged by the program of a control operating device. Based on the results of them, commands are directed to a solenoid drive circuit and a motor relay drive circuit so that solenoids SL1 through SL3 and a motor relay ML of a pressure control valve in a hydraulic pressure control unit are driven. This allows any of decompression or the combination of decompression and holding, compression or the combination of compression and holding, and compression (uncontrollable condition) to be selected depending on the condition of hydraulic pressure control so as to perform anti-lock control as required.</p> |
