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:
May. 18, 2021
Filed:
Oct. 22, 2019
Applicant:
Cummins Inc., Columbus, IN (US);
Inventors:
Thomas A. Grana, Columbus, IN (US);
Girish Chandramouli, Columbus, IN (US);
Sergio M. Hernandez-Gonzalez, Greenwood, IN (US);
Ravindra Kakade, Columbus, IN (US);
Assignee:
Cummins Inc., Columbus, IN (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F01N 11/00 (2006.01); F01N 3/20 (2006.01); F01N 3/035 (2006.01); F02D 41/14 (2006.01);
U.S. Cl.
CPC ...
F01N 11/00 (2013.01); F01N 3/035 (2013.01); F01N 3/2066 (2013.01); F02D 41/1461 (2013.01); F01N 2550/20 (2013.01); F01N 2560/026 (2013.01); F01N 2900/0418 (2013.01); F01N 2900/0422 (2013.01);
Abstract
Diagnostics for inadequate performance and/or degradation of an exhaust aftertreatment system are disclosed. A performance degradation analysis of the exhaust aftertreatment system includes a determination of a long term brake specific NOx value over a time period and a comparison of the long term brake specific NOx value to a threshold value.