| 摘要 |
A driving force transmission device (10) for four-wheel-drive vehicle (12) based on the two-wheel drive of front wheels is provided. In the case of the two-wheel drive of front wheels, a multi-disc clutch mechanism (106) for controlling the driving force distribution to a rear wheel output shaft (118), and a disconnection/connection mechanism (76) for disconnecting and connecting a rear wheel differential (22) and a right rear wheel drive shaft (70) are provided, and in the two-wheel drive of front wheels, the dragging torque of the multi-disc clutch mechanism is made smaller than the friction torque of a rear wheel driving force transmission section (78), and the rear wheel differential (22) and the right rear wheel drive shaft (70) are disconnected by the disconnection/connection mechanism, thereby the rotation of the rear wheel driving force transmission section is stopped. |
