| 摘要 |
PURPOSE:To reduce a decelerating shock due to slip control as well as to make it conformable even to a low friction factor road surface, by using an ignition timing controlling device and a second throttle valve controlling device in combination. CONSTITUTION:At a driving control circuit 30, whether the existing slip state is more than a reference slip state or less than it is found out of the detected results of driving wheel speed sensors 29a and 29b and driven wheel speed sensors 27 and 28. When it is more than the reference slip state, opening of a second throttle valve 14 is reduced to the specified opening, and it is delayed to the specified ignition timing from the proper ignition timing. And, the second throttle valve 14 and the ignition timing are driven and controlled, and engine torque is decreased whereby such measures for lessening the slip state that becomes more than the reference value are carried out. Next, when it is less than the reference slip state, first the ignition timing is put back to the proper ignition timing and then the opening of the second throttle valve 14 is opened at a throttle opening increment per unit time and thereby torque is increased. |
