Isuzu Motors Limited

Youichi Iida

Hiroshi Yoshimura

Satoshi Yamaguchi

Toshifumi Koshizawa

A motor vehicle is controlled to run at a constant speed by calculating a target engine rotational speed based on a preset vehicle speed and a gear position of a transmission, determining an upper limit for the amount of fuel to be supplied to maintain the target engine rotational speed, and controlling the amount of fuel to be supplied below an upper limit based on the difference between the preset vehicle speed and the speed at which the vehicle is running.

Device for controlling motor vehicle to run at constant speed

An apparatus for controlling an automatic gear transmission and for modifying an optimum gear position based on the engine output and the running resistance for the optimum gear position. If the optimum gear position is a shift-up from the present gear position, the shift-up to the optimum gear position is inhibited when the running resistance is larger than the engine output. If the optimum gear position is the present gear position, the gear transmission is shifted down when the running resistance is larger than the engine output for the present gear position.

Growing community of inventors

Kawasaki, Japan

Youichi Iida