DRIVING FORCE DISTRIBUTION CONTROL DEVICE AND DRIVING FORCE DISTRIBUTION METHOD FOR FOUR WHEEL DRIVE VEHICLE

摘要

An ECU (21) as a driving force distribution control device for a four wheel drive vehicle comprises a CPU (22). The CPU (22) controls a coupling (7) that changes torque distribution to front wheels and rear wheels. The CPU (22) selects either of a first and a second torque distribution mode based on a detection signal, or a travel parameter, of a throttle opening sensor (32) and steering angle sensor (34). In the second torque distribution mode, torque distribution to the front wheels and the rear wheels is more equal than in the first torque distribution mode. The CPU (22) sets duration time of the second torque distribution mode when the second torque distribution mode is selected. The CPU (22) continues the control of the coupling (7) with the second torque distribution mode independently of the travel parameter until the duration time has passed.