Analysis of Part-Time Four-Wheel Drive Vehicle

This paper reviews the operation of the part-time four-wheel drive vehicle on a high friction paved road. A summary of our investigations follows:

1. 1)
   The difference in tire radius between the front and rear wheels has a significant influence on traction.
2. 2)
   When braking, the torque which occurs in the drive line is much larger with four-wheel drive.
3. 3)
   The driving resistance of four-wheel drive is different from that of two-wheel drive; it is smaller when driving force is in operation.