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. 27, 2012
Filed:
Feb. 27, 2008
Hikokazu Akimoto, Aichi-ken, JP;
Hikokazu Akimoto, Aichi-ken, JP;
Toyota Jidosha Kabushiki Kaisha, Toyota-shi, JP;
Abstract
The internal combustion engine system makes detection on the occurrence or the non-occurrence of a misfire by comparing the 240-degree difference TDof the 30-degree rotation time T(CA) with the tentative detection reference value Aand comparing the detection base difference ratios Jand Jwith the ranges of the respective reference values B, B, Band Bwhen the exhaust gas recirculation is performed, in addition to the methodology in the non-performance of the exhaust gas recirculation, that is, in addition to the methodology of comparing the 360-degree difference TDof the 30-degree rotation time T(CA) with the tentative detection reference value Aand comparing the detection base difference ratios J, Jand Jwith the ranges of the respective reference values B, B, B, B, Band B(S, S). This arrangement enables to detect a misfire in any of cylinders of the engineaccurately even when the exhaust gas recirculation is performed or not performed.