| 摘要 |
PURPOSE:To improve slip prevention by setting the target throttle opening at the time of the specified slip quantity being generated so as to control the driving torque of an internal combustion engine, and computing the change gear ratio upper limit value necessary for slip prevention at the converged time of the slip so as to set this upper limit value as the target change gear ratio for the control of the actual change gear ratio. CONSTITUTION:An ECU 13 takes in each wheel speed from each wheel speed sensor 16 for driving wheels and driven wheels for comparison. Upon judging the generation of slip over the specified quantity to the driving wheels, the ignition timing is delayed according to the slip quantity to reduce the driving torque of an engine 4, and the opening control of a throttle valve 5 is further combined to suppress the slip. When the slip is converged, the slip limit driving torque is obtained from the engine speed detected by an engine speed sensor 17 and the change gear ratio of a CVT 19 so as to compute the change gear ratio upper limit value necessary for slip prevention in the learning state. In case the target change gear ratio of the CVT 19 set from the vehicle speed and the step-in quantity of an accelerator pedal 14 is over the upper limit value, the upper limit value is set as the target change gear ratio to control the actual change gear ratio. |
