Unisia Jecs Corporation

Atsugi Motor Parts Company, Limited

Eiji Okamura

Hiroyuki Watanabe

Kazumitsu Kobayashi

Hisakazu Muta

Hidehiko Koyashiki

Seiichi Sue

Hirofumi Kato

A piston for an internal combustion engine is provided which has at a top surface thereof a cavity for causing a mixture charge drawn from an intake port into a combustion chamber so as to flow with a rotational motion about a horizontal axis to flow toward a spark plug. A combustion chamber structure for an internal combustion engine is also provided.

Piston for an internal combustion engine

A piston structure includes protection of the peripheral edge portion of a lubricant injection nozzle receptacle cut-out. The piston structure employs mechanisms for reinforcing the peripheral edge portion of the cut-out to an extent that can avoid concentration of the stress and thus can avoid the formation of cracks.

Piston structure for internal combustion engine

Growing community of inventors

Kanagawa, Japan

Eiji Okamura