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. 01, 2017
Filed:
Aug. 20, 2014
Applicant:
Umicore Ag and Co. KG, Hanau-Wolfgang, DE;
Inventors:
Assignee:
UMICORE AG & CO. KG, Hanau-Wolfgang, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F01N 3/00 (2006.01); F02D 41/14 (2006.01); F01N 3/08 (2006.01); F01N 3/10 (2006.01); F02D 41/02 (2006.01);
U.S. Cl.
CPC ...
F02D 41/1446 (2013.01); F01N 3/0807 (2013.01); F01N 3/0814 (2013.01); F01N 3/0842 (2013.01); F01N 3/0871 (2013.01); F01N 3/101 (2013.01); F02D 41/0275 (2013.01); F01N 2260/04 (2013.01); F01N 2570/14 (2013.01); F01N 2570/145 (2013.01); Y02C 20/10 (2013.01); Y02T 10/22 (2013.01);
Abstract
The present invention relates to the use of different regeneration strategies for nitrogen oxide storage catalysts (NOx storage catalyst, LNT or NSC), depending on the exhaust gas temperatures, to reduce in the total exhaust gas the greenhouse gas NO (nitrous oxide) that is produced as a secondary emission during the regeneration of the storage catalyst. If the exhaust gas temperature is below 275° C.-290° C., regeneration takes place using a strategy with short pulses of around 2 seconds and λ Lambda 0.95 rich.