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:
Jul. 17, 2018
Filed:
Jul. 28, 2017
Applicant:
Cummins Inc., Columbus, IN (US);
Inventors:
Yuhui Zha, Columbus, IN (US);
John K Heichelbech, Columbus, IN (US);
Michael J. Cunningham, Greenwood, IN (US);
Assignee:
Cummins Inc., Columbus, IN (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F02M 26/04 (2016.01); F01N 3/20 (2006.01); B01D 53/94 (2006.01); B01D 53/56 (2006.01); B01J 23/42 (2006.01); B01J 23/44 (2006.01);
U.S. Cl.
CPC ...
B01D 53/565 (2013.01); B01J 23/42 (2013.01); B01J 23/44 (2013.01); F01N 3/20 (2013.01); F02M 26/04 (2016.02);
Abstract
An aftertreatment system includes a first oxidation catalyst, a second oxidation catalyst, and a turbocharger. The first oxidation catalyst is upstream of the turbocharger and includes a first oxidation catalyst formulation. The second oxidation catalyst is downstream of the turbocharger and includes a second oxidation catalyst formulation different than the first oxidation catalyst formulation. The second oxidation catalyst formulation is configured to promote conversion of nitric oxide (NO) to nitrogen dioxide (NO).