CONTROL DEVICE FOR INTERNAL COMBUSTION ENGINE

Title:

CONTROL DEVICE FOR INTERNAL COMBUSTION ENGINE

Document Type and Number:

WIPO Patent Application WO/2014/076845

Kind Code:

A1

Abstract:

The purpose of this invention is to accurately and stably calculate the amount of NOx in exhaust gas, with consideration of the effects of fuel injection timing. An engine (10) is provided with a fuel injection valve (14), an NOx reduction catalyst (30), an engine control unit (ECU) (60), and the like. The ECU (60) calculates the amount of NOx in the exhaust gas on the basis of at least two parameters comprising an injection timing exponent for effective injection, which is fuel injection that contributes to combustion in a cylinder, and an intake-air oxygen-concentration exponent. "Effective injection" is a general term for main injection, after-injection, and pilot injection. In this way, it is possible for the calculated values for NOx concentration to reflect the injection timing of effective injection, which has a high correlation with the amount of NOx produced. Consequently, the NOx amount can be accurately and stably calculated without being impacted by difference between machines, driving conditions, and the like of the internal combustion engine.

Inventors:

AOYAGI SHINSUKE (JP)

Application Number:

PCT/JP2012/079983

Publication Date:

May 22, 2014

Filing Date:

November 19, 2012

Export Citation:

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Assignee:

TOYOTA MOTOR CO LTD (JP)
AOYAGI SHINSUKE (JP)

International Classes:

F02D45/00

Foreign References:

JP2012107607A	2012-06-07
JP2004019629A	2004-01-22
JP2011241737A	2011-12-01
JP2009216042A	2009-09-24
JP2009133285A	2009-06-18
JP2009215926A	2009-09-24
JP2005233016A	2005-09-02
JP2004092542A	2004-03-25
JP2005120886A	2005-05-12
JP2005013998A	2005-01-20
JP2005139984A	2005-06-02
JP2009133285A	2009-06-18
JP2005264731A	2005-09-29
JPH10252573A	1998-09-22

Other References: