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:
Aug. 30, 2016
Filed:
Sep. 08, 2014
Applicant:
Cummins Inc., Columbus, IN (US);
Inventors:
Assignee:
Cummins Inc., Columbus, IN (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F01N 3/00 (2006.01); F01N 11/00 (2006.01); B01D 53/94 (2006.01); F01N 3/20 (2006.01); F01N 3/10 (2006.01);
U.S. Cl.
CPC ...
F01N 11/00 (2013.01); B01D 53/9431 (2013.01); B01D 53/9495 (2013.01); F01N 3/103 (2013.01); F01N 3/208 (2013.01); F01N 3/2066 (2013.01); F01N 2560/021 (2013.01); F01N 2560/026 (2013.01); F01N 2900/0416 (2013.01); Y02T 10/24 (2013.01); Y02T 10/47 (2013.01);
Abstract
An example method includes interpreting an NHcomposition value at a position upstream of a selective reduction catalyst (SCR) element fluidly disposed in the exhaust conduit of an engine, interpreting a NOcomposition value at a position downstream of the SCR element, and determining an NHsensor rationality threshold in response to the upstream NHcomposition value. The method further includes determining an NHsensor health value as indicating a sensor failure in response to the downstream NOcomposition value exceeding the NHsensor rationality threshold.