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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 10125654 B1

PDFFull Text
Date of Patent:
Nov. 13, 2018

Filed:

Dec. 19, 2014

Exhaust control system for internal combustion engine

Applicant:

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

Inventors:

Taiga Hagimoto, Susono, JP;

Tomoyuki Kogo, Gotenba, JP;

Arifumi Matsumoto, Gotenba, JP;

Kenji Furui, Susono, JP;

Akifumi Uozumi, Susono, JP;

Assignee:

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

Attorney:

Finnegan, Henderson, Farabow, Garrett & Dunner, LLP

Primary Examiner:

Mark Laurenzi

Assistant Examiner:

Jason Sheppard

Int. Cl.
CPC ...
F01N 11/00 (2006.01); F01N 3/035 (2006.01); F01N 3/10 (2006.01); F01N 3/20 (2006.01); B01D 53/94 (2006.01); F01N 9/00 (2006.01); F01N 3/36 (2006.01);
U.S. Cl.
CPC ...
F01N 11/00 (2013.01); B01D 53/9418 (2013.01); B01D 53/9477 (2013.01); B01D 53/9495 (2013.01); F01N 3/035 (2013.01); F01N 3/103 (2013.01); F01N 3/106 (2013.01); F01N 3/2066 (2013.01); F01N 9/002 (2013.01); B01D 2251/2062 (2013.01); B01D 2251/2067 (2013.01); F01N 3/36 (2013.01); F01N 2250/02 (2013.01); F01N 2550/02 (2013.01); F01N 2550/04 (2013.01); F01N 2560/026 (2013.01); F01N 2560/05 (2013.01); F01N 2560/14 (2013.01); F01N 2570/18 (2013.01); F01N 2610/02 (2013.01); F01N 2900/0412 (2013.01); F01N 2900/1402 (2013.01); F01N 2900/1606 (2013.01); F01N 2900/1621 (2013.01); Y02T 10/24 (2013.01); Y02T 10/47 (2013.01);
Abstract

An exhaust control system for an internal combustion engine comprises: a trapping capability acquisition part that obtains information regarding a PM trapping capability, based on a detection value of an exhaust sensor provided to detect a predetermined parameter relating to an exhaust gas flowing out of an SCRF; and a NOx reduction capability acquisition part obtains information regarding a NOx reduction capability, based on an amount of NOx in the exhaust gas flowing out of the SCRF. The exhaust control system determines and distinguishes between a trapping abnormal state in which a PM trapping function by the SCRF is failed and a sensor abnormal state in which a detection function of the predetermined parameter by the exhaust sensor is failed, based on the NOx reduction capability obtained by the NOx reduction capability acquisition part, when the trapping capability obtained by the trapping capability acquisition part is in a predetermined low trapping capability state. This allows for accurate abnormality determination with regard to the SCRF in the exhaust control system for the internal combustion engine having the SCRF.

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