Toyota Jidosha Kabushiki Kaisha

Koukichi Fujimori

Tatsuo Kobayashi

Toyokazu Baika

Shizuo Abe

Takashi Hashima

Nobuyuki Muramatsu

Souichi Matusita

Yasuhito Tsutsumi

A direct-fuel-injection-type spark-ignition internal combustion engine is disclosed. The engine comprises a spark plug, a cavity formed on the top surface of the piston, and a fuel injection valve for injecting fuel into the cavity in nearly the shape of a fan having a relative small thickness. In the engine, the side wall of the cavity facing the fuel injection valve, for leading the fuel to the vicinity of the spark plug, has a horizontal sectional shape consisting of a part of an ellipse shape of which two foci are at a position of the injection hole of the fuel injection valve and a position near to the spark plug in plan view, and the side wall has a deflecting portion to deflect the fuel toward the inside of the cavity.

Direct-fuel-injection-type spark-ignition internal combustion engine

Growing community of inventors

Fuji, Japan

Koukichi Fujimori