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:
Dec. 11, 2012
Filed:
Aug. 13, 2009
Yasuyoshi Hori, Chiyoda-ku, JP;
Yasuyoshi Hori, Chiyoda-ku, JP;
Mitsubishi Electric Corporation, Tokyo, JP;
Abstract
A control device of an internal combustion engine includes a target air-fuel ratio set portion that sets a target air-fuel ratio according to an operating state of the internal combustion engine, an air-fuel ratio detection portion that detects an actual air-fuel ratio, a feedback correction value calculation portion that calculates a feedback correction value to correct a fuel injection amount for the actual air-fuel ratio to coincide with the target air-fuel ratio, and a fuel property change determination portion that determines a change of a fuel property on the basis of a change of a correction amount including a correction value for the fuel injection amount calculated on the basis of the feedback correction value in addition to the feedback correction value. The control device can determine a change of the fuel property accurately even when a change of the feedback correction value is reflected on another correction value.