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:
Aug. 09, 2011
Filed:
Apr. 11, 2007
Kenichiro Ikeya, Saitama, JP;
Yukihisa Yamaya, Saitama, JP;
Nobuhiko Sasaki, Saitama, JP;
Tatsuya Uchimoto, Saitama, JP;
Yutaka Tajima, Saitama, JP;
Mitsuhiro Shibata, Saitama, JP;
Hiroshi Sono, Saitama, JP;
Kenichiro Ikeya, Saitama, JP;
Yukihisa Yamaya, Saitama, JP;
Nobuhiko Sasaki, Saitama, JP;
Tatsuya Uchimoto, Saitama, JP;
Yutaka Tajima, Saitama, JP;
Mitsuhiro Shibata, Saitama, JP;
Hiroshi Sono, Saitama, JP;
Honda Motor Co., Ltd., Tokyo, JP;
Abstract
In a direct fuel injection diesel engine equipped with a pentroof-shaped piston, when fuel is injected into a cavity () recessed in a central part of a piston (), for which the height of a top face changes in the circumferential direction, from a fuel injection point (Oinj) of a fuel injector disposed on a piston central axis along a plurality of fuel injection axes (LiLi), if a cross-section of the cavity () passing along the fuel injection axis (LiLi) is defined as a fuel injection cross-section (Sn), a cross-sectional shape (see shaded portion) of the cavity () defined by first to third specific points (An, Bn, Cn) on the fuel injection cross-section (Sn) is set so as to be substantially equal for each fuel injection cross-section (Sn). By so doing, the conditions in which fuel and air are mixed in each fuel injection cross-section (Sn) can be made uniform, the engine output can be improved, and harmful exhaust substances can be reduced.