| 摘要 |
PURPOSE:To prevent control by means of value of mu different from an actual road surface condition by calculating friction coefficient of the road surface from vehicle acceleration, and prohibiting the use of the calculated friction coefficient of the road surface for control while travelling on a sloping road in the case of carrying out slip control according to its magnitude. CONSTITUTION:An acceleration slip control device has a slip detecting means A to detect slip volume of a driving wheel, and also has a friction coefficient renewing means C. The friction coefficient renewing means C calculates friction coefficient muof the road surface by using vehicle acceleration detected by means of an acceleration detecting means B, vehicle weight W and a driving wheel load Wr, and in the case the calculated friction coefficient is different from the value mu using at present for control, it inputs new value mu obtained by renewing the value mu to a control means D. The control means D carries out driving torque control according to the renewed value mu and the slip volume. In this case, a sloping road detecting means E to detect sloping road travel is arranged, and when the fact that the vehicle is now travelling on a sloping road is detected, renewal of the friction coefficient of the road surface by means of the friction coefficient renewing means C is prohibited by means of a prohibiting means F. |
