Mazda Motor Corporation

Kouji Kubo

Yasunori Kanda

Koichi Hirata

Shuji Takuma

Tsunehiro Mori

Mitsutaka Yamaya

Yukiyoshi Fukuda

Akira Sumitani

Masahiro Koizumi

Yasuhiro Sudou

Masakazu Kikuchi

Tatsuya Kobayashi

Takeshi Motomuro

Kazuo Toyoda

Tetsuya Hanzawa

Kazuya Nishimori

An engine piston structure includes: a piston (); a connecting rod () having a small end part () coupled to the piston (), and having a large end part () coupled to a crankshaft; a piston pin () through which the piston () and the small end part () of the connecting rod () are coupled together and which has a hollow cross section; and at least one dynamic vibration absorber () provided inside the piston pin () to reduce resonance of the piston (), the piston pin (), and the small end part () of the connecting rod () in combination with respect to the large end part () of the connecting rod () during a combustion stroke.

Piston structure for engine

A piston pin structure for an engine is provided, which suppresses integral resonance of a piston, a piston pin, and a smaller end part of a connecting rod with respect to a larger end part of the connecting rod on the combustion stroke, as well as suppresses an increase of noise on other strokes, and restricts the fixed dynamic absorber inside the piston pin from coming off and ensures a coming-off function. The piston pin structure may include a dynamic absorber including a fixed part fixed to a piston pin, a movable part extending in the axial direction of the piston pin, and a supporting part for swingably supporting the movable part with respect to the fixed part. A restriction mechanism for mechanically restricting the movement of the dynamic absorber in the axial direction may also be included.

Growing community of inventors

Hiroshima, Japan

Kouji Kubo