Honda Motor Co., Ltd.

Mahle Filter Systems Japan Corporation

Atsushi Yoshimura

Yoshihiro Akiyama

Isao Emi

A part of a ceiling wall () of a head cover () that opposes an intake collection chamber () is constituted by a concave ceiling wall () that defines a concave surface facing the intake collection chamber (), and the concave ceiling wall () is formed with a recessed groove () that further recedes toward an inner side of the head cover.

Head cover of an internal combustion engine

A height of an upper end of an oil outflow prevention wallwith respect to the fastening planeis greater in a lower side of the inclination of the fastening planethan in a higher side of the inclination of the fastening plane

Growing community of inventors

Wako, Japan

Atsushi Yoshimura