Engine Misfiring Diagnosis Device

Number of patents in Portfolio can not be more than 2000

United States of America Patent

APP PUB NO 20150192498A1
SERIAL NO

14581914

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ATTORNEY / AGENT: (SPONSORED)

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Abstract

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An engine misfiring diagnosis device includes: a misfiring diagnosis value calculator that calculates a misfiring diagnosis value for determination of misfiring, based on an amount of rotational fluctuations among cylinders; a reference determination threshold calculator that calculates a reference determination threshold for determining occurrence of misfiring, based on an engine operating state; a first misfiring determiner that compares the misfiring diagnosis value with the reference determination threshold, and determines misfiring of a cylinder being diagnosed; and a second misfiring determiner that, if the first misfiring determiner has determined misfiring is occurring, performs re-determination regarding misfiring for the cylinder being diagnosed, based on a difference between a value obtained by correcting the misfiring diagnosis value of the cylinder being diagnosed with a rotational fluctuation correction value based on the engine operating state, and the misfiring diagnosis values of the cylinders before and after the cylinder being diagnosed in combustion process order.

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Patent Owner(s)

Patent OwnerAddress
FUJI JUKOGYO KABUSHIKI KAISHA7-2 NISHISHINJUKU 1-CHOME SHINJUKU-KU TOKYO

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
TAKAHASHI, Daisuke Tokyo, JP 211 974

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