US Patent 7302941 Air-fuel ratio control apparatus for internal combustion engine

Patent 7302941 was granted and assigned to Toyota on December, 2007 by the United States Patent and Trademark Office.

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Patent Inventor Names

Koji Honda0

Masanao Idogawa0

Seiji Hirowatari0

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Patent abstract

An air-fuel ratio control apparatus for an internal combustion engine according to the invention includes a control unit that makes a correction to the fuel injection amount using the air-fuel ratio learned value when calculating the fuel injection amount, and that changes the guard value that places a limitation on the degree of correction to the fuel injection amount made by using the air-fuel ratio learned value, based on the degree to which lubricating oil has been diluted with fuel.

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Official Website

https://pdfpiw.uspto.gov/.piw?Docid=07302941

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