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1. 发明授权

US06968268B2 Misfire detector for an internal combustion engine 有权
标题翻译：内燃机失火探测器
公开(公告)号：US06968268B2
公开(公告)日：2005-11-22
申请号：US10757425
申请日：2004-01-15
申请人： Jun Yamada , Keiji Wakahara , Yoshinori Ma gawa
发明人： Jun Yamada , Keiji Wakahara , Yoshinori Ma gawa
IPC分类号： G01M15/11 , G06G7/70
CPC分类号： G01M15/11
摘要： A misfire detector calculates the engine speed fluctuation quantity Δωn for a predetermined period of time on the basis of the average engine speed on, which is the reciprocal of the time T120n that the crankshaft of the engine takes to turn 120 degrees. By comparing the calculated engine speed fluctuation quantity Δωn with a misfire determination value REF, from which it can be determined whether the engine is misfiring, the misfire detector determines whether the engine is misfiring. The misfire detector detects the rotational fluctuation per combustion stroke of each engine cylinder and learns the variation of the detected rotational fluctuation values during normal combustion. From this learned value and the detected rotational fluctuation value per combustion stroke of the cylinder, the misfire detector determines whether the cylinder is misfiring or not.
摘要翻译：基于作为发动机曲轴转动120度的时间T 120 n的时间的倒数的平均发动机转速on，计算发动机转速波动量Deltaomegan一段预定时间段。通过将计算出的发动机转速波动量Deltaomegan与失火判定值REF进行比较，由此可以确定发动机是否发生故障，失火检测器确定发动机是否发生故障。失火检测器检测每个发动机气缸的每个燃烧行程的旋转波动，并且了解正常燃烧期间检测到的旋转波动值的变化。从该学习值和检测到的气缸的每个燃烧行程的旋转变动值，失火检测器判定气缸是否发生故障。

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