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:
Oct. 28, 2008
Filed:
Jul. 25, 2006
Osamu Maeda, Tokyo, JP;
Keiichi Enoki, Tokyo, JP;
Osamu Maeda, Tokyo, JP;
Keiichi Enoki, Tokyo, JP;
Mitsubishi Electric Corp., Tokyo, JP;
Abstract
The present invention provides a control apparatus for an internal combustion engine which can make a determination on fuel property with high accuracy without causing a cost increase. The control apparatus for the internal combustion engine includes: an intake air amount control unit for controlling an intake air amount of the engine; an ignition timing control unit for controlling an ignition timing of the engine; a catalyst heat-up control unit for increasing the intake air amount after cold start of the engine and performing control for retarding the ignition timing; an air-fuel ratio detecting unit for detecting an air-fuel ratio of exhaust gas in the engine; and a fuel property determining unit for making a determination on fuel property through a comparison between a parameter value calculated from the air-fuel ratio and a preset reference value when the catalyst heat-up control unit performs the control for retarding the ignition timing.