Kabushiki Kaisha Toyota Jidoshokki

Toyota Jidosha Kabushiki Kaisha

Hidetoshi Harima

Koichi Yonezawa

Takashi Tsukiyama

Masaaki Matsuda

Yoshio Taneda

Nariyuki Kataoka

Akira Hayakawa

Shuichi Hirota

Nobuhiko Inoue

A rotating body, which rotates about an axis, includes a recessed reference mark and at least one recessed dummy mark. The reference mark is provided on the surface of the rotating body, serves as a reference for detecting the rotational phase of the rotating body, and can be detected with an electromagnetic wave. The dummy mark is provided on the surface of the rotating body, and is located at a position separated from the reference mark by an angle greater than 90 degrees about the axis.

Rotational solid

A turbocharger impeller is provided with a hub portion with a plurality of vane portions extending outwardly thereof. The hub portion is substantially shaped as a truncated cone with a diameter that gradually increases along a rotation axis. The vane portions are formed on a surface of the hub portion and guide a fluid flowing along the rotation axis radially outward relative to the hub portion. Grooves are formed in and/or on surfaces of the vane portions along a direction of the fluid flowing radially outward during rotation of the impeller. Protruding crest portions are formed between adjacent grooves. Crest portions in a central region near the rotation axis are lower in height than crest portions in an outer region further away from the rotation axis.

Turbocharger impeller, method of manufacturing the same, turbocharger, and turbocharger unit

Growing community of inventors

Kariya, Japan

Hidetoshi Harima