Nissan Motor Company Limited

Akinobu Yoshibe

Shuichi Nishimura

Michihiro Yamane

An internal combustion engine has an intake valve and an exhaust valve. When the engine operates at low speed with low and medium load, the intake valve is operated to close at a relatively advanced timing for increased volumetric effeciency and increased real compression ratio. When the engine operates at low speeds with high load, the exhaust valve is operated to close at a relatively retarded timing with the intake valve being operated to close at the relatively advanced timing, whereby the volumetric efficiency is subject to a drop to prevent occurrence of knocking.

Growing community of inventors

Kamakura, Japan

Akinobu Yoshibe