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:
Apr. 17, 2012
Filed:
Mar. 24, 2006
Michael Cunningham, Greenwood, IN (US);
Bradlee Stroia, Columbus, IN (US);
Michael Cunningham, Greenwood, IN (US);
Bradlee Stroia, Columbus, IN (US);
Fleetguard, Inc., Nashville, TN (US);
Abstract
An apparatus, system, and method are disclosed for regenerating an exhaust gas treatment device. A controller module directs an injector to provide reductant to an exhaust gas treatment device over a plurality of rich intervals during a regeneration cycle. In addition, the controller module directs the injector to reduce the reductant provided to the exhaust gas treatment device over a lean interval between the rich intervals to create a lean environment within the exhaust gas treatment device. In one embodiment, the controller module modifies the reductant provided during each rich interval, the number of rich intervals, the length of the rich intervals, and the length of the lean intervals in response to an exhaust gas state.