DRIVING SYSTEM OF FOUR-WHEEL DRIVE VEHICLE, FOUR-WHEEL DRIVE VEHICLE AND CONTROL METHOD OF FOUR-WHEEL DRIVE VEHICLE

摘要

PROBLEM TO BE SOLVED: To provide a driving system of a four-wheel drive vehicle, the four-wheel drive vehicle and a control method of the four-wheel drive vehicle, capable of improving fuel efficiency, by reducing weight in a propeller shaft.SOLUTION: This driving system of the four-wheel drive vehicle includes the propeller shaft 2 mounted on the four-wheel drive vehicle 100 having front wheels 104a and 104b being main driving wheels and rear wheels 105a and 105b being auxiliary driving wheels and transmitting driving force on the engine 102 side to the rear wheel 105a, 105b side, a meshing clutch 3 capable of cutting off the torque transmission between an engine 102 and the propeller shaft 2, a torque coupling 4 capable of cutting off the torque transmission between the propeller shaft 2 and the rear wheels 105a and 105b, and an ECU 5 for cutting off both the torque transmissions by the meshing clutch 3 and the torque coupling 4 when a vehicle speed is a predetermined set speed or more.