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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 9822682 B1

PDFFull Text
Date of Patent:
Nov. 21, 2017

Filed:

Oct. 05, 2015

Exhaust gas purification apparatus for an internal combustion engine

Applicant:

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

Inventor:

Yoshio Yamashita, Susono, JP;

Assignee:

TOYOTA JIDOSHA KABUSHIKI KAISHA, Toyota-shi, JP;

Attorney:

Andrews Kurth Kenyon LLP

Primary Examiner:

Amber R Orlando

Int. Cl.
CPC ...
B01D 50/00 (2006.01); B01D 49/00 (2006.01); B01D 39/00 (2006.01); B01D 41/00 (2006.01); B01D 45/00 (2006.01); B01D 46/00 (2006.01); B01D 51/00 (2006.01); F01N 3/025 (2006.01); F01N 3/10 (2006.01); F01N 9/00 (2006.01); F01N 3/027 (2006.01);
U.S. Cl.
CPC ...
F01N 3/025 (2013.01); F01N 3/027 (2013.01); F01N 3/106 (2013.01); F01N 9/002 (2013.01); F01N 2900/1406 (2013.01); F01N 2900/1606 (2013.01); Y02T 10/47 (2013.01);
Abstract

An exhaust gas purification apparatus for an internal combustion engine, capable of carrying out oxidation removal of PM deposited in a filter as a whole in an efficient manner, includes a filter arranged in an exhaust passage of the internal combustion engine and having an oxidation catalyst supported in at least an upstream side portion thereof, and a heating device arranged so as to be able to heat the upstream side portion of the filter irrespective of oxidation reaction heat of the oxidation catalyst, wherein when filter upstream regeneration processing to oxidize and remove deposition PM in the upstream side portion of the filter is carried out by controlling a heating device, an amount of decrease of the upstream side deposition PM by the filter upstream regeneration processing is reflected on an amount of filter PM deposition in the ordinary filter regeneration processing which oxidizes and removes the deposition PM in the entire filter by means of oxidation reaction heat of unburnt fuel generated by the oxidation catalyst supported in the filter, and the filter upstream regeneration processing is ended, even if the thus reflected amount of filter PM deposition is in a state of being larger than a reference amount of deposition which is a threshold value for ending the ordinary filter regeneration processing.

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