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. 07, 2010
Filed:
Dec. 28, 2006
Hideki Takubo, Tokyo, JP;
Hideki Takubo, Tokyo, JP;
Mitsubishi Electric Corporation, Tokyo, JP;
Abstract
Provided is a control device for an internal combustion engine, which can enable stable and fine control of an average air/fuel ratio of an exhaust gas on the upstream side of a catalyst. The control device for an internal combustion engine includes: a catalytic converter; an upstream Osensor to the upstream of the catalyst; a downstream Osensor to the downstream of the catalyst; a first air/fuel ratio feedback control unit for controlling the air/fuel ratio of the exhaust gas based on an output value of the upstream Osensor and a controlling constant group; a second air/fuel ratio feedback control unit for calculating a target average air/fuel ratio AFAVEobj based on the output value of the upstream Osensor and an output target value VR; and a conversion unit for calculating at least two controlling constants by using the target average air/fuel ratio AFAVEobj as a common index.