| 摘要 |
PURPOSE:To make higher a limit to turning radius by controlling an increase or a decrease in a differential limiting force from the outside on the basis of detected signals of a turning direction and the rotary speed of right and left driving wheels, and prohibiting the function of a driving wheel propulsion control device. CONSTITUTION:A control device 13 judges a turning direction on a steering angle 142. For example, when a vehicle turns to the left and a right wheel WR is faster than a left wheel WL, the device 13 judges a condition as in an initial turn and outputs a control current signal (i) to an electromagnetic proportion reducing valve 46 so as to reduce clutch pressure 'P' down to zero. After the intermediate time of turning and when the left wheel WL is faster than the right wheel WR, it is judged that an inner wheel spin is taking place and a driving force is being released from the left wheel WL, differential limiting torque 'T' is so increased or decreased as to make the slip ratio SR of the outer wheel WR agree to a predetermined slip ratio S0, and a work prohibiting signal (d0) is outputted to a traction control device 7 when said differential torque 'T' is being limited. According to the aforesaid constitution, a turning limit can be made higher. |
