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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 10473047 B1

PDFFull Text
Date of Patent:
Nov. 12, 2019

Filed:

Nov. 27, 2015

Apparatus and method for controlling an internal combustion engine

Applicant:

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

Inventor:

Shintaro Hotta, Susono, JP;

Assignee:

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

Attorney:

Finnegan, Henderson, Farabow, Garrett & Dunner, LLP

Primary Examiner:

Sizo B Vilakazi

Assistant Examiner:

Kevin R Steckbauer

Int. Cl.
CPC ...
F02D 41/02 (2006.01); F02B 37/16 (2006.01); F02D 41/40 (2006.01); F02D 13/02 (2006.01); F02D 41/00 (2006.01); F02B 27/02 (2006.01); F02B 29/04 (2006.01); F02B 37/00 (2006.01); F02B 37/013 (2006.01); F02D 41/22 (2006.01); F02B 27/00 (2006.01);
U.S. Cl.
CPC ...
F02D 41/0275 (2013.01); F02B 27/0294 (2013.01); F02B 29/04 (2013.01); F02B 37/004 (2013.01); F02B 37/013 (2013.01); F02B 37/162 (2019.05); F02D 13/0203 (2013.01); F02D 13/0261 (2013.01); F02D 41/0007 (2013.01); F02D 41/221 (2013.01); F02D 41/40 (2013.01); F02B 27/00 (2013.01); F02D 41/00 (2013.01); F02D 2041/001 (2013.01); F02D 2200/0406 (2013.01); F02D 2200/0614 (2013.01); F02D 2200/101 (2013.01); Y02T 10/144 (2013.01); Y02T 10/146 (2013.01); Y02T 10/18 (2013.01); Y02T 10/44 (2013.01);
Abstract

An engine includes an exhaust gas control apparatus that is configured to store NOx and react NOx with a reduction agent. A control device for the engine includes an electronic control unit. The electronic control unit is configured to: (i) execute a rich spike control, the rich spike control is a control executed to temporarily change an in-cylinder air-fuel ratio from a leaner air-fuel ratio than the stoichiometric air-fuel ratio to the stoichiometric air-fuel ratio or a richer air-fuel ratio than the stoichiometric air-fuel ratio, and (ii) vary an overlap amount of an intake valve and an exhaust valve such that the overlap amount is less during execution of the rich spike control than during non-execution of the rich spike control, in an operation range where a pressure of the intake port becomes higher than a pressure of the exhaust port.

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