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. 18, 2015
Filed:
Dec. 16, 2010
Xiao Lin, Indianapolis, IN (US);
Daniel D. Wilhelm, Nashville, IN (US);
Baohua Qi, Columbus, IN (US);
Xi Wei, Asbury, IA (US);
Xiao Lin, Indianapolis, IN (US);
Daniel D. Wilhelm, Nashville, IN (US);
Baohua Qi, Columbus, IN (US);
Xi Wei, Asbury, IA (US);
CUMMINS EMISSION SOLUTIONS INC., Columbus, IN (US);
Abstract
A method includes raising a temperature of an SCR catalyst for a predetermined time period while dosing urea. The method further includes maintaining the temperature of the SCR catalyst without dosing urea for a second predetermined time period. The method further includes filtering out at least low frequency data from a first NOsensor upstream of the SCR catalyst and from a second NOsensor downstream of the SCR catalyst, and comparing the filtered data from the first NOsensor and the second NOsensor without dosing urea over a third predetermined time period. The method further includes providing a NOsensor condition index for at least one of the first NOsensor and the second NOsensor in response to the comparing.