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. 26, 2015
Filed:
Mar. 18, 2011
Mert Geveci, Athens, GA (US);
Andrew W. Osburn, Nashville, IN (US);
Donald W. Stanton, Columbus, IN (US);
Mert Geveci, Athens, GA (US);
Andrew W. Osburn, Nashville, IN (US);
Donald W. Stanton, Columbus, IN (US);
Cummins Inc., Columbus, IN (US);
Abstract
A system includes an engine, an exhaust conduit for the engine, a first SCR catalyst fluidly coupled to the exhaust conduit, and a second SCR catalyst fluidly coupled to the exhaust conduit at a position downstream of the first SCR catalyst. The system further includes an ammonia sensor positioned between the first and second SCR catalysts. A reductant doser is positioned upstream of the first SCR catalyst. The system includes a controller that determines an amount of NHpresent from the NHsensor, and computes an actuator response function from at least one operating condition of the first SCR catalyst. The actuator response function includes a reductant injector response as a function of the amount of NH, and the actuator response function includes a response discontinuity. The controller further determines a reductant injection amount from the amount of NHand the actuator response function, and provides a reductant injector command.