Abstract
The project discussed in this paper developed a new electronically controlled all-wheel-drive system that replaces dual-pump system exploiting front-rear wheel rotation speed difference. The new system has hydraulic circuit with an electric hydraulic pump and a solenoid control valve. The use of electronic control has further optimized rear wheel driving force, the realization of increased responsiveness has made it possible to do away with a one-way cam, and a low-friction BRG has been employed. These and other innovations in the new system have made it possible to reduce weight and friction.
