Hitachi, Ltd.

Nissan Motor Company Limited

Nippon Piston Ring Co., Ltd.

Takaaki Kondo

Tetsuya Watanabe

Takuma Suzuki

Toyoki Iguchi

Kazuhiro Fujimura

Tomonori Miyazawa

Junpei Ogawa

Tsugane Hirase

Hisashi Oono

Hiromichi Yokokawa

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

A multiserver workflow system in which each server and the users who use clients construct one subsystem includes: a plurality of servers; a plurality of clients; and a network to which the servers and the clients are connected. All of the servers have address information of the servers constructing all of the subsystems and correspondence information on all of the users and the subsystem which can be used by respective users. When each client connects to any one of the servers, the client downloads a list of the subsystems which can be used by the user who uses the client and addresses of the servers constructing the usable subsystems from the connection server and stores the list as a connectable server list.

Multiserver workflow system

Growing community of inventors

Yokohama, Japan

Takaaki Kondo