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. 31, 2021
Filed:
Dec. 11, 2017
Cummins Emission Solutions Inc., Columbus, IN (US);
Varun R. Rajagopal, Columbus, IN (US);
Farshad Farid, Cranberry Township, PA (US);
Jinqian Gong, Columbus, IN (US);
Cummins Emission Solutions Inc., Columbus, IN (US);
Abstract
A system for diagnosing an improper reductant concentration includes: a selective catalytic reduction (SCR) catalyst unit, a doser configured to dose reductant into a chamber of the SCR catalyst unit, a reductant concentration sensor, and a controller. In some embodiments, the controller is configured to: direct the doser to dose the reductant into the chamber of the SCR catalyst unit, based on information received from the reductant concentration sensor, determine a reductant concentration level in the chamber of the SCR catalyst unit, compare a measured system-out NOvalue to at least one benchmark value corresponding to the determined reductant concentration level, and determine a status of the reductant dosed by the doser based on the comparison of the measured system-out NOvalue to the at least one benchmark value.