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:
Jun. 09, 2015
Filed:
Mar. 30, 2011
Ronald Graham Silver, Peoria, IL (US);
David Mark Heaton, nr Peterborough, GB;
James Joshua Driscoll, Dunlap, IL (US);
Anibal Villatoro Prats, United Kingdom, GB;
Lyn Mcwilliam, Peterborough, GB;
Ronald Graham Silver, Peoria, IL (US);
David Mark Heaton, nr Peterborough, GB;
James Joshua Driscoll, Dunlap, IL (US);
Anibal Villatoro Prats, United Kingdom, GB;
Lyn McWilliam, Peterborough, GB;
Caterpillar Inc., Peoria, IL (US);
Abstract
An engine system includes an electronically controlled compression ignition engine configured to burn diesel fuel to produce an exhaust with a temperature and NOx to soot ratio. An aftertreatment system is fluidly connected to the engine and includes a diesel oxidation catalyst, a reductant supply, and a diesel particulate filter coated with a NOx reduction catalyst but not the diesel oxidation catalyst. A soot load density in the diesel particulate filter is stabilized by oxidizing soot at about a same rate as the compression ignition engine is supplying soot to the aftertreatment system without active regeneration. A NOx reduction reaction is catalyzed by the NOx reduction catalyst on the diesel particulate filter.