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    • 94. 发明申请
    • ADAPTIVE METHOD OF CYLINDER MISFIRE DETECTION IN AN INTERNAL COMBUSTION ENGINE
    • 内燃机缸体故障自适应检测方法
    • WO1994000745A1
    • 1994-01-06
    • PCT/GB1993001313
    • 1993-06-22
    • FORD WERKE A.G.FORD FRANCE S.A.FORD MOTOR COMPANY LIMITEDFORD MOTOR COMPANY
    • FORD WERKE A.G.FORD FRANCE S.A.FORD MOTOR COMPANY LIMITEDFORD MOTOR COMPANYMANGRULKAR, Suresh, M.PIATAK, John, W.
    • G01M15/00
    • G01M15/11
    • An adaptive method of detecting a misfiring cylinder in a spark-ignited internal combustion engine during substantially all engine operating conditions, including most no-load operation. The method includes the step of normalising an engine acceleration-independent and engine speed-independent power cycle time differential signal for a particular cylinder of the engine, obtained from consecutive power cycle time periods of an engine cycle, utilising a calibration parameter stored in the memory for the particular cylinder, to obtain a normalised power cycle time differential signal for the particular cylinder. The method also includes the step of comparing the normalised power cycle time differential signal to a misfire threshold signal stored in the memory to determine if the cyclinder is misfiring. Preferably, the misfire threshold signal is based on at least one engine operating parameter. The method also includes the step of adaptively modifying the calibration parameter stored in the memory based on the comparison.
    • 一种在基本上所有的发动机运行条件下检测火花点火的内燃机中的点火气缸的自适应方法,包括大多数空载操作。 该方法包括以下步骤:利用存储在存储器中的校准参数,对发动机循环的连续功率循环时间周期获得的用于发动机的特定气缸的发动机加速度独立和发动机速度独立功率循环时间差分信号进行归一化 对于特定气缸,获得用于特定气缸的归一化的功率循环时间差分信号。 该方法还包括将归一化功率周期时间差分信号与存储在存储器中的失火阈值信号进行比较以确定循环器是否发生故障的步骤。 优选地,失火阈值信号基于至少一个发动机操作参数。 该方法还包括基于比较自适应地修改存储在存储器中的校准参数的步骤。