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. 21, 2006
Filed:
Oct. 03, 2003
Axel Zurloye, Columbus, IN (US);
Dave Ruthmansdorfer, Freetown, IN (US);
Tim Frazier, Columbus, IN (US);
Jennifer Rumsey, Greenwood, IN (US);
Axel Zurloye, Columbus, IN (US);
Dave Ruthmansdorfer, Freetown, IN (US);
Tim Frazier, Columbus, IN (US);
Jennifer Rumsey, Greenwood, IN (US);
Cummins Westport Inc., Vancouver, CA;
Abstract
The present method and apparatus employ a signal indicative of cylinder pressure within the combustion chamber of an internal combustion engine to control combustion phasing or start of combustion (SOC) in subsequent cycles of the engine where the engine is driven by combustion of both a fuel/air premixed charge and a directly injected quantity of fuel. A ratio of signals indicative of pre-combustion pressure and post-combustion pressure within a cycle are employed to estimate SOC and then, based on a predetermined target SOC, an ignition lever is employed to adjust subsequent SOC. A preferred ignition lever is, in a pilot fuel ignited engine, pilot fuel quantity.