| 摘要 |
PURPOSE:To prevent wheels from excessively slipping and being locked, by setting the rising rate of brake pressure in accordance with the stage of a gear shift position so that the brake pressure is controlled to a pressure rising rate set value corresponding to the gear shift position when a slip rate exceeds a limit value. CONSTITUTION:There is provided a brake pressure rising rate setting means 32 which receives a detection signal from a gear shift position detectors S1 for detecting the gear shift position of a running gear shift means C, and reads a brake pressure rising rate corresponding to a shift position at the time when the slip rate corresponding to a shift position at the time when the slip rate of drive wheels exceeds an appropriate value which is required for obtaining a maximum torque. Further, there are provided a slip rate detecting means 34 detecting the slip rate of the drive wheels in accordance with output signals from wheel rotational speed sensors S2, S3, and an appropriate slip rate value setting means 35 for setting an appropriate slip value with which a maximum torque is exhibited. Further, when the slip rate exceeds a limit value, an instruction is delivered to a brake device B for controlling the brake pressure to the thus set pressure rising rate value.
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