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    • 83. 发明授权
    • Misfire detecting device for internal combustion engine
    • 内燃机失火检测装置
    • US5617032A
    • 1997-04-01
    • US587927
    • 1996-01-17
    • Hiroshi Inagaki
    • Hiroshi Inagaki
    • G01R27/00F02P15/00F02P17/00F02P17/12G01M15/04
    • F02P17/12F02P2017/006F02P2017/125
    • A misfire detecting device for an internal combustion engine is provided. The misfire detecting device includes high voltage pulse producing means for producing, after spark discharge of a spark plug, a high voltage pulse which is not so high as to cause the spark plug to discharge, voltage applying means for applying the high voltage pulse to a conductive path connecting between a secondary winding of an ignition coil to the spark plug, by way of a reverse current preventing diode and a leakage preventing diode connected to the conductive path or by way of a reverse current preventing diode and the secondary winding of the ignition coil, voltage dividing means for dividing a voltage at a side of the reverse current preventing diode nearer to the conductive line to obtain a divided voltage, misfire detecting means for detecting a misfire on the basis of a decay characteristic of the divided voltage obtained after application of the high voltage pulse, wherein the reverse current preventing diode and the leakage preventing diode or the secondary winding of the ignition coil are connected by means of a shielding wire having an outer conductor for shielding.
    • 提供了一种用于内燃机的失火检测装置。 失火检测装置包括高电压脉冲产生装置,用于在火花塞的火花放电之后产生不高于使火花塞放电的高电压脉冲,用于将高电压脉冲施加到电压脉冲的电压施加装置 通过连接到导电路径的反向电流防止二极管和防漏二极管连接点火线圈的次级绕组与火花塞之间的导电路径,或者通过反向电流防止二极管和次级绕组点火 线圈,分压装置,用于将反向电流防止二极管的一侧的电压与导线接近以获得分压;失火检测装置,用于根据施加之后获得的分压电压的衰减特性来检测失火 的高电压脉冲,其中反向电流防止二极管和防漏二极管或次级绕组 e点火线圈通过具有用于屏蔽的外部导体的屏蔽线连接。