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. 25, 2015
Filed:
May. 02, 2014
Cummins Inc., Columbus, IN (US);
Mert Geveci, Delmar, NY (US);
Feng Liu, Greenwood, IN (US);
Cummins Inc., Columbus, IN (US);
Abstract
A system and method are disclosed for a selective catalytic reductant (SCR) catalyst with an NHsensor operationally coupled mid-catalyst of the SCR catalyst and a controller in electronic communication with the NHsensor configured to interpret a diagnostic enablement condition of the NHsensor. The controller is configured to control a reductant injector to inject varying reductant amounts over a range of ANR values in response to the enablement condition being satisfied. The controller also is configured to determine a lower bound of estimates of the NHamount at the mid-bed catalyst position for the reductant amounts, and determine an NHsensor fault condition in response to actual sensor outputs and the NHlower bound value.