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:
Nov. 01, 2016
Filed:
Dec. 03, 2012
Cummins Inc., Columbus, IN (US);
Feng Liu, Greenwood, IN (US);
Mert Geveci, Delmar, NY (US);
Cummins Inc., Columbus, IN (US);
Abstract
A system includes an internal combustion engine providing exhaust gases to an exhaust conduit, an aftertreatment system having an SCR catalyst component and disposed in the exhaust conduit. The system further includes a first NHsensing element preferentially sensitive to NHand a second NHsensing element preferentially sensitive to NOin the exhaust conduit. Both NHsensing elements are positioned downstream of the SCR catalyst component. The system includes a controller having a test conditions module that determines whether an NOconcentration downstream of the SCR catalyst component is below a threshold value, an NHdiagnostic module that provides a detection comparison value in response to the NOconcentration, a first signal from the first NHsensing element, and a second signal from the second NHsensing element. The controller includes a sensor condition module that provides an NHsensor condition value in response to the detection comparison value.