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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.:

US 9822683 B1

PDFFull Text
Date of Patent:
Nov. 21, 2017

Filed:

Nov. 16, 2012

Exhaust gas purification system for internal combustion engine

Applicants:

Yoshihisa Tsukamoto, Susono, JP;

Nobumoto Ohashi, Shizuoka-ken, JP;

Shigeki Nakayama, Gotenba, JP;

Akira Mikami, Susono, JP;

Kenji Sakurai, Uji, JP;

Hiroshi Otsuki, Gotenba, JP;

Junichi Matsuo, Susono, JP;

Keishi Takada, Kanagawa-ken, JP;

Ichiro Yamamoto, Kariya, JP;

Inventors:

Yoshihisa Tsukamoto, Susono, JP;

Nobumoto Ohashi, Shizuoka-ken, JP;

Shigeki Nakayama, Gotenba, JP;

Akira Mikami, Susono, JP;

Kenji Sakurai, Uji, JP;

Hiroshi Otsuki, Gotenba, JP;

Junichi Matsuo, Susono, JP;

Keishi Takada, Kanagawa-ken, JP;

Ichiro Yamamoto, Kariya, JP;

Assignee:

Toyota Jidosha Kabushiki Kaisha, Toyota-shi, Aichi, JP;

Attorney:

Finnegan, Henderson, Farabow, Garrett & Dunner, LLP

Primary Examiner:

Jonathan Matthias

Assistant Examiner:

Jason Sheppard

Int. Cl.
CPC ...
F01N 3/00 (2006.01); F01N 3/025 (2006.01); F01N 3/10 (2006.01); F01N 3/20 (2006.01); F02D 41/02 (2006.01); F01N 9/00 (2006.01); F02D 41/40 (2006.01); F01N 3/023 (2006.01); F01N 3/035 (2006.01); F01N 13/00 (2010.01); B01D 53/04 (2006.01); F01N 3/021 (2006.01); F01N 3/029 (2006.01); F01N 3/28 (2006.01); B01D 53/94 (2006.01);
U.S. Cl.
CPC ...
F01N 3/0253 (2013.01); B01D 53/0415 (2013.01); B01D 53/9477 (2013.01); B01D 53/9495 (2013.01); F01N 3/021 (2013.01); F01N 3/0231 (2013.01); F01N 3/0293 (2013.01); F01N 3/035 (2013.01); F01N 3/103 (2013.01); F01N 3/106 (2013.01); F01N 3/208 (2013.01); F01N 3/2066 (2013.01); F01N 3/2882 (2013.01); F01N 9/002 (2013.01); F01N 13/009 (2014.06); F02D 41/029 (2013.01); F02D 41/405 (2013.01); B01D 53/944 (2013.01); B01D 53/9418 (2013.01); B01D 2251/2062 (2013.01); B01D 2255/1021 (2013.01); B01D 2255/20738 (2013.01); B01D 2255/20761 (2013.01); B01D 2255/50 (2013.01); B01D 2255/9155 (2013.01); B01D 2257/406 (2013.01); B01D 2257/502 (2013.01); B01D 2257/702 (2013.01); B01D 2258/012 (2013.01); F01N 2560/06 (2013.01); F01N 2560/14 (2013.01); F01N 2610/02 (2013.01); F01N 2610/03 (2013.01); F01N 2900/1404 (2013.01); F01N 2900/1602 (2013.01); F01N 2900/1622 (2013.01); F02D 2200/0802 (2013.01); F02D 2200/0812 (2013.01); Y02T 10/24 (2013.01); Y02T 10/44 (2013.01); Y02T 10/47 (2013.01);
Abstract

An exhaust gas purification system for an internal combustion engine is provided with a filter including a selective catalytic reduction NOx catalyst carried thereon. Further, a post-catalyst is provided for an exhaust gas passage disposed on a downstream side from the filter. The post-catalyst has an oxidizing function, and the post-catalyst has such a function that the production of Nbased on the oxidation of ammonia is facilitated in a predetermined first temperature area. A filter regeneration process execution unit is programmed to control the temperature of the post-catalyst to be in the first temperature area while adjusting the temperature of the filter to be in a predetermined second temperature area lower than a filter regeneration temperature during a certain period of time.

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