Nissan Motor Company Limited

Nippon Piston Ring Co., Ltd.

Hiromichi Yokokawa

Takuma Suzuki

Katsuaki Ogawa

Toyoki Iguchi

Kazuhiro Fujimura

Tomonori Miyazawa

Junpei Ogawa

Takaaki Kondo

Shiro Shibata

Tsugane Hirase

Mamoru Miyamoto

There is provided a highly heat conductive piston ring for an internal combustion engine capable of exhibiting a gas seal function and a heat transfer function for a long period of time in a stable manner when used in an automobile gasoline engine having a high compression ratio. The highly heat conductive piston ring for an internal combustion engine is a piston ring for an internal combustion engine having an Mn&#x2014;Cr steel as a base material, the Mn&#x2014;Cr steel including C in the range of from 0.52 to 0.65 mass %, Si in the range of from 0.15 to 0.35 mass %, Mn in the range of from 0.60 to 1.00 mass %, Cr in the range of from 0.60 to 1.00 mass %, P in the range of 0.04 mass % or less, S in the range of 0.04 mass % or less, a slight amount of components (total content of Al, Ni, and Cu) in the range of from 0.05 to 3.0 mass %, and a remnant being Fe and unavoidable impurities.

Highly heat conductive piston ring for internal combustion engine

Growing community of inventors

Utsunomiya, Japan

Hiromichi Yokokawa