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:
May. 31, 2011
Filed:
Jul. 31, 2008
John Stephen Roth, Millcreek Township, PA (US);
Kyle Craig Stott, Erie, PA (US);
James Robert Mischler, Franklin Township, PA (US);
Paul Flynn, Fairview, PA (US);
Kirk Heywood, Erie, PA (US);
Daniel Allan Moser, Erie, PA (US);
John Stephen Roth, Millcreek Township, PA (US);
Kyle Craig Stott, Erie, PA (US);
James Robert Mischler, Franklin Township, PA (US);
Paul Flynn, Fairview, PA (US);
Kirk Heywood, Erie, PA (US);
Daniel Allan Moser, Erie, PA (US);
General Electric Company, Schenectady, NY (US);
Abstract
Methods and systems are provided for operating an internal combustion engine having an exhaust system and a plurality of cylinders that utilize fuel and/or oil for combustion and engine lubrication purposes. In one example, a method comprises, while the engine is operating in a low-load mode or an idle mode, successively operating distinct subsets of said cylinders at a cylinder load sufficient to increase an exhaust temperature for burning unburned fuel and/or oil deposited in the cylinders or engine exhaust system. Herein, each successively operated subset comprises at least one but fewer than all of the plurality of cylinders, and the cylinders that are not currently being operated in a subset are operated in a low- or no-fuel mode.