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. 13, 2011
Filed:
Jan. 13, 2009
Jayaramanaraman K. Venkataraghavan, Dunlap, IL (US);
Stephen R. Lewis, Chillicothe, IL (US);
Shriprasad Lakhapati, Peoria, IL (US);
Avinash R. Manubolu, Edwards, IL (US);
Nadeem N. Bunni, Cranberry Township, PA (US);
Jayaramanaraman K. Venkataraghavan, Dunlap, IL (US);
Stephen R. Lewis, Chillicothe, IL (US);
Shriprasad Lakhapati, Peoria, IL (US);
Avinash R. Manubolu, Edwards, IL (US);
Nadeem N. Bunni, Cranberry Township, PA (US);
Caterpillar Inc., Peoria, IL (US);
Abstract
A fuel injector for a common rail fuel system includes a common rail inlet port fluidly connected to a high pressure common rail, and a cooling inlet fluidly connected to an output from a lower pressure fuel transfer pump. The cooling fluid circulates internally through the fuel injector to cool a single pole solenoid via both internal and peripheral cooling passages. In order to accommodate a small spatial envelope while providing superior performance, a thin insulating layer may separate the solenoid coil winding from an inner pole piece, and small flux gap clearances may permit a flux carrying portion of the injector body to be a portion of the single pole solenoid assembly.