| 摘要 |
PROBLEM TO BE SOLVED: To reduce a burden of a user, by making generation of a four-wheel drive selectable. SOLUTION: This four-wheel drive device has a first power source 3 driving a first wheel drive shaft 1 rotated, a second power source 14 driving a second wheel drive shaft 2 rotated when a four-wheel drive is selected, a first power source control means 5, and a second power source control means 16, the first power source control means 5 is provided with a reduction amount calculation means 43 calculating a reduction amount relating to output shaft torque of the first power source 3 or drive torque of the first wheel drive shaft 1 at ordinary control time, and this reduction amount is transmitted to the second power source control means 16 through a communication means 11 when the four-wheel drive is selected, and the second power source control means 16, for controlling output shaft torque of the second power source 14 to be related to the received reduction amount, determines target drive torque of the second wheel drive shaft. |
