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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 9879624 B1

PDFFull Text
Date of Patent:
Jan. 30, 2018

Filed:

May. 14, 2013

Controlling device for internal combustion engine

Applicant:

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

Inventor:

Satoru Tanaka, Odawara, JP;

Assignee:

TOYOTA JIDOSHA KABUSHIKI KAISHA, Toyota-shi, JP;

Attorney:

Andrews Kurth Kenyon LLP

Primary Examiner:

Hai Huynh

Int. Cl.
CPC ...
F02D 43/00 (2006.01); F02D 41/00 (2006.01); F02D 21/08 (2006.01); F02D 41/12 (2006.01); F02D 41/14 (2006.01); F02P 5/152 (2006.01); F02D 11/02 (2006.01); F02D 13/02 (2006.01); F02D 41/30 (2006.01); F02P 5/04 (2006.01);
U.S. Cl.
CPC ...
F02D 41/0055 (2013.01); F02D 11/02 (2013.01); F02D 13/0226 (2013.01); F02D 21/08 (2013.01); F02D 41/0002 (2013.01); F02D 41/0005 (2013.01); F02D 41/0007 (2013.01); F02D 41/12 (2013.01); F02D 41/1497 (2013.01); F02D 41/3005 (2013.01); F02P 5/045 (2013.01); F02P 5/1521 (2013.01); F02D 2021/083 (2013.01); F02D 2041/001 (2013.01); F02D 2041/0017 (2013.01); Y02T 10/18 (2013.01); Y02T 10/42 (2013.01); Y02T 10/46 (2013.01); Y02T 10/47 (2013.01);
Abstract

In response to decrease of a requested torque to a reference value or smaller, a value of a virtual air-fuel ratio that is used in calculation of a target air amount for achieving the requested torque is changed from a first air-fuel ratio to a second air-fuel ratio that is leaner than the first air-fuel ratio. The target air amount is calculated backwards from the requested torque by using the virtual air-fuel ratio. After the value of the virtual air-fuel ratio is changed from the first air-fuel ratio to the second air-fuel ratio, the target air-fuel ratio is switched from the first air-fuel ratio to the second air-fuel ratio. A target EGR rate is calculated by using the virtual air-fuel ratio. The target EGR rate is preferably determined by minimum value selection between a first target value of an EGR rate that is calculated by using the virtual air-fuel ratio, and a second target value of the EGR rate that is calculated by using the target air-fuel ratio.

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