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:
Jun. 30, 2020
Filed:
Jan. 31, 2019
Applicants:
Hyundai Motor Company, Seoul, KR;
Kia Motors Corporation, Seoul, KR;
Inventors:
Nahm Roh Joo, Gyeonggi-do, KR;
Chang Hwan Kim, Gyeonggi-do, KR;
ChangHo Jung, Gyeonggi-do, KR;
Chulho Yu, Seoul, KR;
Assignees:
HYUNDAI MOTOR COMPANY, Seoul, KR;
KIA MOTORS CORPORATION, Seoul, KR;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F01N 3/10 (2006.01); F01N 3/20 (2006.01); B01D 53/94 (2006.01);
U.S. Cl.
CPC ...
F01N 3/2073 (2013.01); F01N 3/101 (2013.01); F01N 3/103 (2013.01); F01N 3/208 (2013.01); F01N 3/2066 (2013.01); B01D 53/945 (2013.01); B01D 53/9477 (2013.01); B01D 53/9481 (2013.01); B01D 53/9495 (2013.01); B01D 2255/40 (2013.01); B01D 2255/904 (2013.01); B01D 2255/908 (2013.01); B01D 2255/911 (2013.01); B01D 2258/012 (2013.01); F01N 2610/02 (2013.01); F01N 2900/1404 (2013.01); F01N 2900/1622 (2013.01); F01N 2900/1624 (2013.01);
Abstract
An after treatment method for a lean-burn engine is disclosed. The after treatment method is configured to control an after treatment system sequentially equipped with an ammonia production catalyst module, a selective catalytic reduction catalyst, and a CO clean-up catalyst on an exhaust pipe through which an exhaust gas flows. In the after treatment method, the engine is operated sequentially at a stoichiometric air/fuel ratio (AFR) and a lean AFR prior to entering a rich AFR.