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. 15, 2019
Filed:
Dec. 19, 2017
Applicant:
Toyota Jidosha Kabushiki Kaisha, Toyota-shi, Aichi-ken, JP;
Inventor:
Arifumi Matsumoto, Gotenba, JP;
Assignee:
Toyota Jidosha Kabushiki Kaisha, Toyota-shi, Aichi-ken, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F01N 3/20 (2006.01); F02B 63/04 (2006.01); B01D 53/94 (2006.01); H02K 7/18 (2006.01); F01N 11/00 (2006.01);
U.S. Cl.
CPC ...
F01N 3/208 (2013.01); B01D 53/9418 (2013.01); B01D 53/9495 (2013.01); F01N 3/2066 (2013.01); F01N 11/002 (2013.01); F01N 11/007 (2013.01); F02B 63/04 (2013.01); H02K 7/1815 (2013.01); F01N 2550/02 (2013.01); F01N 2560/025 (2013.01); F01N 2560/06 (2013.01); F01N 2610/02 (2013.01); F01N 2900/1402 (2013.01); F01N 2900/1404 (2013.01); F01N 2900/1602 (2013.01); Y02T 10/24 (2013.01); Y02T 10/47 (2013.01);
Abstract
A reducing agent is supplied to an NOx selective catalytic reduction catalyst in a suitable manner, while suppressing NOx from being produced by oxidation of ammonia in the NOx catalyst. In cases where the temperature of the NOx catalyst is equal to or higher than a predetermined temperature at which ammonia is oxidized, an amount of the reducing agent to be supplied to the NOx catalyst is made larger, when an air fuel ratio of exhaust gas flowing into the NOx catalyst is small, than it is large.