| 摘要 |
PURPOSE:To prevent excessive slip restraint by releasing fuel supply from decrease control when the rotational frequency of an engine is shifted from acceleration to deceleration. CONSTITUTION:A throttle valve control circuit 34 calculates an actual slip ratio between a tire and road surface from drive wheel speed sensed by front wheel rotational frequency sensors 31, 32 and vehicle speed sensed by a rear wheel rotational frequency sensor 30. When the actual slip ratio exceeds a predetermined set one, drive force reduction control including fuel supply reduction control is started by a fuel cut device 36. When the rotational frequency of an engine detected by an engine rotational frequency sensor 39 is shifted from acceleration to deceleration, fuel supply reduction control is released. Thus, control releasing timing can be carried out early by monitoring the increase and decrease of engine rotational frequency, so that a responsive lag in a power train P between an engine 10 and drive wheels 16, 17 due to tortion or the like of a propeller shaft 12 can almost be eliminated. |
