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:
Oct. 30, 2018
Filed:
Apr. 22, 2016
Applicant:
Cummins Inc., Columbus, IN (US);
Inventors:
Rohan A. Siddhanthi, Columbus, IN (US);
Bryon D. Staebler, Columbus, IN (US);
Krishna Kamasamudram, Columbus, IN (US);
Assignee:
Cummins Inc., Columbus, IN (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F01N 3/20 (2006.01); B01D 53/94 (2006.01); F01N 13/00 (2010.01); F01N 3/021 (2006.01);
U.S. Cl.
CPC ...
F01N 3/2066 (2013.01); B01D 53/9418 (2013.01); B01D 53/9431 (2013.01); F01N 3/021 (2013.01); F01N 13/0093 (2014.06); B01D 53/9477 (2013.01); B01D 2251/2062 (2013.01); B01D 2255/20723 (2013.01); B01D 2255/20738 (2013.01); B01D 2255/20761 (2013.01); B01D 2255/50 (2013.01); B01D 2255/904 (2013.01); B01D 2255/911 (2013.01); B01D 2257/404 (2013.01); B01D 2258/012 (2013.01); F01N 2240/40 (2013.01); F01N 2510/063 (2013.01); F01N 2610/02 (2013.01); Y02C 20/10 (2013.01); Y02T 10/24 (2013.01);
Abstract
An exhaust aftertreatment system configured to reduce nitrous oxide (NO) formation includes a first selective catalytic reduction (SCR) catalyst. The first SCR catalyst is configured for low NO formation and low ammonia (NH) storage capacity. A second SCR catalyst is positioned downstream of the first SCR catalyst. The second SCR catalyst is configured for high NHstorage capacity.