Honda Motor Co., Ltd.

Yasuhiro Kawamura

Hiroki Tanaka

Shingo Tanaka

Shigenao Maruyama

Yoshito Tsukamoto

Atsuki Komiya

Morimasa Nagata

Seiji Kosaka

Shuichi Moriya

Junya Negishi

Yoshita Tsukamoto

Yukihiro Wakihata

Koshiro Baba

A rotary electric machine includes a rotor shaft, a rotor attached to the rotor shaft, a stator, and a case that houses the rotor and the stator. One end side and the other end side of the rotor shaft in an axial direction are respectively supported by the case via bearings with the rotor interposed therebetween. The bearings electrically insulate the rotor shaft and the case from each other.

Rotary electric machine

Disclosed is a piston cooling device wherein the cooling efficiency of a piston is improved by oil injected from an oil jet and supplied to a cooling passage provided in the piston, and the amount of cooling oil is reduced when an internal combustion engine is operated at maximum output. The piston cooling device is provided with a piston for an internal combustion engine, in which a circumferential passage and a cooling passage having an inlet passage and an outlet passage are provided, and an oil jet for injecting oil from an injection port to the inlet passage. The oil jet injects oil at every stroke of the piston so that a two-phase plug flow composed of gas and oil is formed in the cooling passage at least when an internal combustion engine is operated at maximum output.

Piston cooling device

Growing community of inventors

Saitama, Japan

Yasuhiro Kawamura