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:
Jan. 30, 2018
Filed:
Aug. 19, 2015
Cummins, Inc., Columbus, IN (US);
Aniket Gupta, Wuhan, CN;
Michael J. Cunningham, Greenwood, IN (US);
Michael Haas, Columbus, IN (US);
Govindarajan Kothandaraman, Columbus, IN (US);
Cummins, Inc., Columbus, IN (US);
Abstract
An apparatus includes a nitrogen oxide (NOx) module and a selective catalytic reduction (SCR) diagnostic module. The NOx module is in exhaust gas communication with an exhaust flow of an exhaust aftertreatment system from an engine. The NOx module is structured to interpret NOx data indicative of an amount of NOx exiting the engine and an amount of NOx exiting the exhaust aftertreatment system, and determine a NOx conversion efficiency fault is present based on the amount of NOx exiting the engine and the amount of NOx exiting the exhaust aftertreatment system. The SCR diagnostic module is structured to determine at least one of a SCR catalyst and a diesel particulate filter including a coating of a SCR reaction catalyst (DPF-SCR) are responsible for the NOx conversion efficiency fault based on at least one of a reductant slip amount and a NOx conversion value across at least one of the SCR catalyst and the DPF-SCR.