The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 01, 2018
Filed:
Sep. 12, 2014
Toyota Jidosha Kabushiki Kaisha, Toyota-shi, Aichi-ken, JP;
Manabu Tateno, Suntou-gun, JP;
Akio Kawaguchi, Suntou-gun, JP;
Hideyuki Nishida, Suntou-gun, JP;
Hideo Yamashita, Mishima, JP;
Hiroki Iguma, Susono, JP;
Akira Yamashita, Suntou-gun, JP;
Kazuyasu Iwata, Fuji, JP;
Toyota Jidosha Kabushiki Kaisha, Toyota-shi, Aichi-ken, JP;
Abstract
The present invention relates to an internal combustion engine. An object of the invention is to allow an effect produced by an anodic oxide film to be exerted while suppressing a decrease in the combustion rate. A pistonincludes a cavity portionand a tapered portionthat is formed so as to surround the cavity portionon an outer side thereof. The diameter of the tapered portiondecreases progressively in the downward direction from the top face side of the piston. A squish portionis formed on an outer side of the tapered portion. An anodic oxide filmis formed on a surface (tapered face) of the tapered portionand a surface (squish face) of the squish portion. The anodic oxide filmis not formed on the surface (cavity face) of the cavity portion