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.:
Date of Patent:
Jul. 14, 2015
Filed:
May. 17, 2010
Shinsuke Aoyagi, Zama, JP;
Shinsuke Aoyagi, Zama, JP;
TOYOTA JIDOSHA KABUSHIKI KAISHA, Toyota, JP;
Abstract
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, the control device having 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), determining whether the fuel injection quantity deviation is zero, positive, or negative.