| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a control device of a four-wheel drive vehicle capable of proving a target drive force by driving front and rear wheels at an appropriate drive force distribution ratio corresponding to variations even if a vehicle state, a vehicle operating state, or a road state is changed. <P>SOLUTION: This control device is set to a four-wheel drive mode driving the front and rear wheels when, in a second prime mover operation control means 154, the operating state of the vehicle in a vehicle start determination means 138, an acceleration operation determination means 146, a low temperature state determination means 162, and a wheel slip determination means 140 is in either of a start state, an accelerated state, and a low friction coefficient road surface traveling state. When the operating state is not in any of these states, the control device is set to a two-wheel drive mode for driving the front or rear wheels. By this, when they are in either of the start state, accelerated state, and low friction coefficient road surface traveling state, the control device is automatically set to the four-wheel drive mode driving the front and rear wheels. Accordingly, unnecessary four-wheel drive can be avoided according to the operating state to properly prevent a second prime mover operated to set to the four-wheel drive mode from being overheated. <P>COPYRIGHT: (C)2005,JPO&NCIPI |
