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:
Nov. 15, 2011
Filed:
Apr. 11, 2007
Mitsuhiro Shibata, Saitama, JP;
Hiroshi Sono, Saitama, JP;
Nobuhiko Sasaki, Saitama, JP;
Tatsuya Uchimoto, Saitama, JP;
Kenichiro Ikeya, Saitama, JP;
Yutaka Tajima, Saitama, JP;
Yukihisa Yamaya, Saitama, JP;
Mitsuhiro Shibata, Saitama, JP;
Hiroshi Sono, Saitama, JP;
Nobuhiko Sasaki, Saitama, JP;
Tatsuya Uchimoto, Saitama, JP;
Kenichiro Ikeya, Saitama, JP;
Yutaka Tajima, Saitama, JP;
Yukihisa Yamaya, Saitama, JP;
Honda Motor Co., Ltd., Tokyo, JP;
Abstract
In a direct fuel injection diesel engine having a piston with a pentroof-shaped top face, with regard to a pentroof-shaped piston () with a cavity () recessed in a central part of the top face, a radial width S of a squish area () formed between an outer peripheral part of the top face and a lower face of a cylinder head () changes in the circumferential direction of the piston (). By setting a squish clearance H large for a portion where the radial width S of the squish area () is large and setting the squish clearance H small for a portion where the radial width S of the squish area () is small, more specifically, by setting S/H so that it is constant in the circumferential direction, it is possible to make the strength of the squish flow uniform in the circumferential direction of the piston, thus promoting the mixing of air and fuel and reducing harmful exhaust components.