CONTROL DEVICE FOR INTERNAL COMBUSTION ENGINE

Title:

CONTROL DEVICE FOR INTERNAL COMBUSTION ENGINE

Document Type and Number:

WIPO Patent Application WO/2011/145223

Kind Code:

A1

Abstract:

Disclosed is a control device for an internal combustion engine, which determines a fuel injection quantity deviation state and/or an intake oxygen concentration-related parameter deviation state on the basis of the relationship between the target value (Qtgt) of the fuel injection quantity and an NOx concentration deviation (ΔNOx) indicating the difference of the measured value or the estimate value of the NOx concentration of exhaust gas with respect to a predetermined NOx reference concentration, said control device being provided with a state determination means for, on the basis of a first determination index including the amount of change of the NOx concentration deviation (ΔNOx) when the target value (Qtgt) of the fuel injection quantity increases within a predetermined range and the NOx concentration deviation (ΔNOx) when the target value (Qtgt) of the fuel injection quantity is a predetermined first value (Qtgt2), and the like, determining whether the fuel injection quantity deviation is zero, positive, or negative.

Inventors:

AOYAGI SHINSUKE (JP)

Application Number:

PCT/JP2010/058684

Publication Date:

November 24, 2011

Filing Date:

May 17, 2010

Export Citation:

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Assignee:

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

International Classes:

F02D45/00

Foreign References:

JP2002371893A	2002-12-26
JP2007127004A	2007-05-24
JPH025736A	1990-01-10
JP2003049685A	2003-02-21
JP2008215260A	2008-09-18
JP2002371893A	2002-12-26

Other References: