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:
Dec. 09, 2003
Filed:
Dec. 20, 2002
Andreas M. Lippert, Rochester Hills, MI (US);
Sherif Hussein El Tahry, Troy, MI (US);
Hiroaki Inoue, Hamamatsu Shizuoka, JP;
Takahiro Noyori, Hamamatsu Shizuoka, JP;
General Motors Corporation, Detroit, MI (US);
Abstract
A fuel injector for a spark ignition direct injection engine includes an injection having plurality of spray holes formed in a generally semicircular pattern wherein the spray holes have a L/D (length over diameter) ratio of not more than 2.0. In a preferred embodiment, the injector nozzle has an internal sac and an end wall with part spherical inner and outer surfaces formed with a common center, the pattern of the spray holes includes a semicircle formed by an arc having ends connected by a straight line wherein the spray holes have outlet openings that are spaced along the arc and slightly below the straight line, and the spray holes lying on the semicircle extend from the common center while the spray holes lying below the straight line have axes extending from above the common center. In an engine, the flat side of the spray is aimed toward the near side of a piston bowl recess.