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:
Sep. 11, 2012
Filed:
Dec. 25, 2008
Ryo Kondo, Toyota, JP;
Akihiro Katayama, Toyota, JP;
Ryo Kondo, Toyota, JP;
Akihiro Katayama, Toyota, JP;
Toyota Jidosha Kabushiki Kaisha, Aichi-ken, JP;
Abstract
Structured with a rotational fluctuation measuring sectionmeasuring a rotational fluctuation amount DTdi, a misfire judging sectionjudging a misfire by comparing the rotational fluctuation amount with a judging threshold value, a low load judging sectionjudging an internal combustion engine operating under a low load condition, and an ignition angle judging sectionjudging an ignition angle exceeding an ignition delay angle, wherein the misfire judging sectionhas a map Mwith judging threshold values thwith respect to rotational speeds ne of the engine and a map Mwith judging threshold values thwith rotational fluctuation amounts larger than the map M, and judges the misfire based on the maps Mand Mwhen the engine is operating under the low load condition with the ignition angle exceeding the ignition delay angle and, in other cases, based only on the map M
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