TRACTION CONTROL DEVICE OF VEHICLE

摘要

PROBLEM TO BE SOLVED: To maintain the revolving speed of an engine over the revolving speed of a fuel recovery due to up shifting during the traction control with fuel cutting. SOLUTION: A slip state or not is judged at 31 by depending whether an accelerating slipΔVW1 of a driving wheel is not less than the setting or not. A fuel cutting is made so thatΔVW becomes the maximum objective slip of a road surface coefficient of friction at 32 or 33 independently of the judgment result of 31. When judged asΔVW>=ΔVW1 at 31, a gear change inhibiting demand is issued, and when judged as acceleration slip cancellation due to thatΔVW is reduced to the objective slip at 35, the fuel cutting is ended at 36. In the case of applying an acceleration pedal, when judged as idle switch ON (acceleration pedal releasing) or when judged as up shifting or not of an automatic transmission at 38, the gear change inhibiting is released at 39.