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 10077744 B1

Date of Patent:

Sep. 18, 2018

Filed:

Dec. 20, 2013

Exhaust gas control apparatus for internal combustion engine

Applicant:

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

Inventor:

Yoshito Nogi, Susono, JP;

Assignee:

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

Attorney:

Finnegan, Henderson, Farabow, Garrett & Dunner, LLP

Primary Examiner:

Thai Ba Trieu

Int. Cl.

CPC ...

F02B 33/44 (2006.01); F02M 25/06 (2016.01); F01N 5/04 (2006.01); F02M 26/04 (2016.01); F02D 21/08 (2006.01); F02D 41/00 (2006.01); F02D 41/02 (2006.01); F02D 41/14 (2006.01); F01N 3/08 (2006.01); F02M 26/05 (2016.01); F02M 26/06 (2016.01); F02M 26/15 (2016.01); F02M 26/50 (2016.01); F02M 26/52 (2016.01); F02B 37/12 (2006.01); F02B 47/08 (2006.01); F01N 13/00 (2010.01); F02M 26/24 (2016.01);

U.S. Cl.

CPC ...

F02M 26/04 (2016.02); F01N 3/0842 (2013.01); F01N 3/0871 (2013.01); F02B 37/12 (2013.01); F02B 47/08 (2013.01); F02D 21/08 (2013.01); F02D 41/0007 (2013.01); F02D 41/0055 (2013.01); F02D 41/0065 (2013.01); F02D 41/0275 (2013.01); F02D 41/1475 (2013.01); F02M 26/05 (2016.02); F02M 26/06 (2016.02); F02M 26/15 (2016.02); F02M 26/50 (2016.02); F02M 26/52 (2016.02); F01N 13/009 (2014.06); F01N 2610/03 (2013.01); F01N 2900/0422 (2013.01); F01N 2900/1602 (2013.01); F01N 2900/1614 (2013.01); F02D 2041/0017 (2013.01); F02D 2200/0406 (2013.01); F02D 2200/0812 (2013.01); F02M 26/24 (2016.02); Y02T 10/144 (2013.01); Y02T 10/47 (2013.01);

Abstract

A rich control for temporarily declining an air-fuel ratio of exhaust gas discharged from an engine combustion chamber is performed by an additional fuel being injected into a cylinder in an expansion stroke or an exhaust stroke in a state where a throttle opening degree is switched from a base throttle opening degree to a throttle opening degree for the rich control and an EGR rate is switched from a base EGR rate to an EGR rate for the rich control. The rich control is initiated by switching a low pressure side EGR control valve opening degree (VEGRL) to a low pressure side EGR control valve opening degree for the rich control (VEGRLR), then switching a high pressure side EGR control valve opening degree (VEGRH) to a high pressure side EGR control valve opening degree for the rich control (VEGRHR), then controlling the throttle opening degree (VTH), and then initiating the injection of the additional fuel (Qa).

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