Fuji Jukogyo Kabushiki Kaisha

Ryuzo Sakikiyama

Fujio Makita

Toru Yamakawa

Mitsuo Umezawa

A power transmission control system for a four-wheel drive vehicle powered by an engine has a transmission for transmitting the power of the engine to main driving wheels of the four-wheel drive vehicle, and a clutch for transmitting the power to auxiliary driving wheels. A hydraulic circuit for operating the clutch and a solenoid operated valve are provided for operating the clutch. Speed sensors are provided for detecting speeds of the main and auxiliary driving wheels in order to detect the slipping of wheels and vehicle speed. A steering angle is sensed for detecting a large steering angle. An electric circuit is provided to respond to the output of the speed sensors at slipping for engaging the clutch and to respond to large steering angle at low vehicle speed for disengaging the clutch for providing two-wheel driving.

Growing community of inventors

Tokyo, Japan

Ryuzo Sakikiyama