| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a driving force control device of a four-wheel drive vehicle capable of reducing a generation of an acceleration slip at a main driving wheel at the moment when the vehicle is transferred from the four-wheel driving state to the state close to the two-wheel drive even in the case of traveling on a slippy road surface. <P>SOLUTION: An output torque of an engine is transmitted to a front wheel, i.e., a main driving wheel and a torque of a motor can be transmitted to a rear wheel, i.e., a driven wheel. A driving torque of the rear wheel is controlled to a torque corresponding to an accel opening at a first predetermined car speed (5 km/h) or lower and when it exceeds the first predetermined car speed, it is controlled to a torque corresponding to an amount of acceleration slip of the front wheel. However, in the case where it is judged that the friction state of the wheel and the road surface is low μ, a second predetermined car speed (10 km/h) larger than the first predetermined car speed is made to a car speed for switching instead of the first predetermined car speed. <P>COPYRIGHT: (C)2004,JPO |
