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:
Feb. 26, 2008
Filed:
Jan. 28, 2005
Donald J. Benson, Columbus, IN (US);
David M. Rix, Columbus, OH (US);
Lester L. Peters, Columbus, IN (US);
Shankar C. Venkataraman, Columbus, IN (US);
C. Edward Morris, Jr., Columbus, IN (US);
Donald J. Benson, Columbus, IN (US);
David M. Rix, Columbus, OH (US);
Lester L. Peters, Columbus, IN (US);
Shankar C. Venkataraman, Columbus, IN (US);
C. Edward Morris, Jr., Columbus, IN (US);
Cummins Inc., Columbus, IN (US);
Abstract
A closed nozzle fuel injector is provided which effectively controls the fuel injection flow rate, especially during an initial portion of an injection event, while also permitting accurate control over pilot and/or post injection flow rates at all operating conditions thereby advantageously reducing emissions and combustion noise. The injector includes a rate shaping orifice to restrict fuel flow during an initial portion of an injection event and a rate shaping sleeve mounted for movement to cause a greater flow of injection fuel during a later portion of the injection event. A damping chamber and orifice are also provided to control movement of the rate shaping sleeve.