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:
Mar. 30, 1993
Filed:
Dec. 19, 1991
Shinichi Kitajima, Wako, JP;
Yoshihiko Kobayashi, Haga, JP;
Honda Giken Kogyo Kabushiki Kaisha, Tokyo, JP;
Abstract
A air-fuel control system for internal combustion engines using a blended fuel composed of gasoline and alcohol for determining or presuming a correction factor due to alcohol concentration in the fuel when an alcohol sensor for detecting the same has failed. An average value of the O.sub.2 feedback correction factor reflecting a deviation between a target air fuel ratio and an actual air-fuel ratio is obtained and based on it, a target value is determined. The average value is compared with upper and lower limits and when it reaches either one, the factor obtained when the sensor operated properly is adjusted by an amount to follow up the target value.