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. 30, 2008
Filed:
Mar. 27, 2007
Ronald L. Graves, Knoxville, TN (US);
Brian H. West, Knoxville, TN (US);
Shean P. Huff, Knoxville, TN (US);
James E. Parks, Ii, Knoxville, TN (US);
Ronald L. Graves, Knoxville, TN (US);
Brian H. West, Knoxville, TN (US);
Shean P. Huff, Knoxville, TN (US);
James E. Parks, II, Knoxville, TN (US);
UT-Battelle, LLC, Oak Ridge, TN (US);
Abstract
A method and system controls engine-out exhaust species of a combustion engine having a plurality of cylinders. The method typically includes various combinations of steps such as controlling combustion parameters in individual cylinders, grouping the individual cylinders into a lean set and a rich set of one or more cylinders, combusting the lean set in a lean combustion parameter condition having a lean air:fuel equivalence ratio, combusting the rich set in a rich combustion parameter condition having a rich air:fuel equivalence ratio, and adjusting the lean set and the rich set of one or more cylinders to generate net-lean combustion. The exhaust species may have elevated concentrations of hydrogen and oxygen.