Unisia Jecs Corporation

Shingo Motoda

Hiroaki Watanabe

Hideyuki Miyasaka

Kazuhiko Shirane

In a reciprocating piston of an internal combustion engine comprising a piston skirt having a major-thrust-side skirt portion and a minor-thrust-side skirt portion, a projected circumferential width of the minor-thrust-side skirt portion is greater than a projected circumferential width of the major-thrust-side skirt portion. Additionally, the piston skirt is dimensioned so that the minimum thickness of the minor-thrust-side skirt portion is less than the minimum thickness of the major-thrust-side skirt portion.

Piston of internal combustion engine

A piston for an internal combustion engine includes a ring land formed with a piston-ring groove, and a skirt connected to the ring land so that the piston-ring groove is adjacent thereto, the skirt being formed with a piston-pin hole with an axis, and having a plane including the axis of the piston-pin hole. A taper is formed on the skirt in a first portion thereof nearer to the ring land than the plane to converge on the ring land.

Growing community of inventors

Kanagawa, Japan

Shingo Motoda