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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 9732667 B1

PDFFull Text
Date of Patent:
Aug. 15, 2017

Filed:

Jul. 20, 2015

Egr control method of internal combustion engine

Applicant:

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

Inventor:

Yasuhiro Kuze, Numazu, JP;

Assignee:

TOYOTA JIDOSHA KABUSHIKI KAISHA, Toyota-shi, JP;

Attorney:

Andrews Kurth Kenyon LLP

Primary Examiner:

Patrick Maines

Int. Cl.
CPC ...
F02M 25/07 (2006.01); F02B 37/00 (2006.01); F02B 37/18 (2006.01); F02M 26/46 (2016.01); F02M 26/48 (2016.01); F02D 41/00 (2006.01); F02M 26/06 (2016.01); F02M 26/38 (2016.01); F02B 37/12 (2006.01); F02M 26/43 (2016.01); F02D 41/30 (2006.01); F02M 26/15 (2016.01);
U.S. Cl.
CPC ...
F02B 37/001 (2013.01); F02B 37/183 (2013.01); F02D 41/005 (2013.01); F02D 41/0065 (2013.01); F02D 41/0082 (2013.01); F02M 26/06 (2016.02); F02M 26/38 (2016.02); F02M 26/46 (2016.02); F02M 26/48 (2016.02); F02B 2037/122 (2013.01); F02D 41/3064 (2013.01); F02M 26/15 (2016.02); F02M 26/43 (2016.02); Y02T 10/144 (2013.01); Y02T 10/42 (2013.01); Y02T 10/47 (2013.01);
Abstract

The invention has an object to control an EGR amount accurately in transient time. An ECU switches EGR control to the one-valve EGR control and the both-valve EGR control based on a request EGR amount. When the EGR control is switched to the one-valve EGR control from the both-valve EGR control, an EGR valve of one bank is closed first. Next, during a time period until an opening degree restriction time period elapses after the EGR valve is closed, an opening degree of an EGR valve of the other bank is restricted to be smaller than a one-valve target opening degree. Subsequently, when the opening degree restriction time period elapses, restriction of the opening degree of the EGR valve is cancelled, and the opening degree of the EGR valve is changes to the one-valve target opening degree.

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