ENGINE MISFIRE DETERMINATION DEVICE AND VEHICLE

To provide an engine misfire determination device which is applicable to determination of misfires in a variety of forms of engines.SOLUTION: A misfire determination part comprises: a combustion variation cancel value acquisition part for acquiring a first combustion variation cancel value being a r...

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Bibliographic Details
Main Authors KINOSHITA HISATOSHI, NONOGAKI YOSHIHIKO, HOTTA MINORU, ARAMAKI AKIRA, IWAMOTO KAZUTERU
Format Patent
LanguageEnglish
Japanese
Published 06.06.2019
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Summary:To provide an engine misfire determination device which is applicable to determination of misfires in a variety of forms of engines.SOLUTION: A misfire determination part comprises: a combustion variation cancel value acquisition part for acquiring a first combustion variation cancel value being a rotational speed in a zone of a crank angle of 720×m degrees including a first angle position, and acquiring a second combustion variation cancel value being a rotational speed in a zone of a crank angle of 720×m degrees including a second angle position; a combustion variation actualization value calculation part for calculating a first variation actualization value by removing the first combustion variation cancel value from the rotational speed in the first angle position, and calculating a second variation actualization value by removing the second combustion cancel value from the rotational speed in the second angle position; a first stage difference calculation part for calculating a first stage difference between the first variation actualization value and the second variation actualization value; and a specified cylinder misfire determination part for determining a misfire of a specified cylinder by the first stage difference.SELECTED DRAWING: Figure 1 【課題】様々な種類のエンジンにおける失火の判定に適用可能なエンジン用失火判定装置及び車両を提供すること。【解決手段】失火判定装置は、第1角度位置を含む720×m度クランク角度の区間における回転速度である、第1燃焼変動キャンセル値を取得するとともに、第2角度位置を含む720×m度クランク角度の区間における回転速度である、第2燃焼変動キャンセル値を取得する燃焼変動キャンセル値取得部と、第1角度位置における回転速度から第1燃焼変動キャンセル値を除去することにより第1変動顕在化値を算出するとともに、第2角度位置における回転速度から第2燃焼変動キャンセル値を除去することにより第2変動顕在化値を算出する燃焼変動顕在化値算出部と、第1変動顕在化値と第2変動顕在化値との1階差分を算出する1階差分算出部と、1階差分により特定気筒の失火を判定する特定気筒失火判定部と、を備える。【選択図】図1
Bibliography:Application Number: JP20170212401