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:
Mar. 27, 2012
Filed:
Apr. 30, 2009
Phanindra Garimella, Bloomington, IN (US);
Joan M. Wills, Nashville, IN (US);
John N. Chi, Columbus, IN (US);
Neal W. Currier, Columbus, IN (US);
Aleksey Yezerets, Columbus, IN (US);
Phanindra Garimella, Bloomington, IN (US);
Joan M. Wills, Nashville, IN (US);
John N. Chi, Columbus, IN (US);
Neal W. Currier, Columbus, IN (US);
Aleksey Yezerets, Columbus, IN (US);
Cummins IP, Inc, Minneapolis, MN (US);
Abstract
According to one representative embodiment, an apparatus for determining the degradation of a selective catalytic reduction (SCR) catalyst of an engine exhaust aftertreatment system includes a system properties module configured to store at least one system dynamics property value of the exhaust system at a first time and receive the at least one system dynamics property value of the exhaust aftertreatment system at a second time subsequent to the first time. The apparatus also includes a system dynamics module configured to determine a storage capacity of the SCR catalyst based on a comparison between the at least one system dynamic property value at the first time and the at least one system dynamic property value at the second time. Additionally, the apparatus includes an SCR catalyst degradation factor module configured to determine an SCR catalyst degradation factor based at least partially on the storage capacity of the SCR catalyst.