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, 2004
Filed:
May. 13, 2002
Honda Giken Kogyo Kabushiki Kaisha, Tokyo, JP;
Abstract
The air-fuel ratio of an air-fuel mixture to be combusted in an internal combustion engine is manipulated to converge an output VO /out of an O sensor which is disposed downstream of a catalytic converter to a target value VO /TARGET depending on an operating state of the internal combustion engine , while at the same time a deterioration evaluating parameter is determined from time-series data of the output VO /out of the O sensor . The value of the deterioration evaluating parameter is corrected depending on an average value of the output VO /out of the O sensor or the target value VO /TARGET, and the deteriorated state of the catalytic converter is evaluated based on the corrected value of the deterioration evaluating parameter.