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. 20, 2014
Filed:
Aug. 22, 2011
James C. Clerc, Columbus, IN (US);
Timothy M. White, Greenwood, IN (US);
Melissa Zaczek, Indianapolis, IN (US);
Baohua Qi, Columbus, IN (US);
James C. Clerc, Columbus, IN (US);
Timothy M. White, Greenwood, IN (US);
Melissa Zaczek, Indianapolis, IN (US);
Baohua Qi, Columbus, IN (US);
Cummins Emission Solutions, Stoughton, WI (US);
Abstract
An exemplary embodiment is a system, including an internal combustion engine fluidly coupled to an exhaust gas flowpath, an aftertreatment system disposed in the exhaust gas flowpath, where the aftertreatment system includes a NOreduction catalyst. The exemplary system includes a processing subsystem having a controller, where the controller includes modules structured to functionally execute operations for determining a catalyst degradation. The modules include a test conditions module, a testing module, a monitoring module, and a catalyst aging module. The test conditions module interprets a test conditions event occurrence for the NOreduction catalyst, the testing module commands a catalyst efficiency test in response to the test conditions event occurrence, the monitoring module interprets operating condition(s) indicative of a NOconversion efficiency during the catalyst efficiency test, and the catalyst aging module determines a catalyst aging value in response to the at least one operating condition.