| 摘要 |
PURPOSE:To improve the accuracy of control, by pulling a reference speed up as far as the specified value at the elapse of the specified time from the release of braking hydraulic pressure, while changing it into a second reference speed being small in deceleration at a low friction factor passage, and adding brake fluid pressure so as to meet the lifting acceleration. CONSTITUTION:In time of a brake switch 66 being turned on, if deceleration in a wheel speed within the specified time is more than the first deceleration, a central processing unit calculates a first reference speed or being a dropped value at the first deceleration in making the time reached to the first deceleration a starting point. On the basis of the first reference speed, the CPU actuates a hydraulic control part 14, performing antiskid control. Simultaneously with actuation of the hydraulic control part 14, the CPU counts the time and, if the wheel speed does not come to more than the first reference speed within the specified counting time, judges to be a low friction factor passage whereby the CPU pulls up the reference speed and controls it so as to change into a second reference speed being small in deceleration, while braking hydraulic pressure is added with the timing corresponding to the lifting acceleration of the wheel speed after releasing the braking hydraulic pressure. |
