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    Combustion state-detecting system for internal combustion engines
    1.
    发明授权
    Combustion state-detecting system for internal combustion engines 失效
    内燃机燃烧状态检测系统

    公开(公告)号：US5415035A

    公开(公告)日：1995-05-16

    申请号：US118679

    申请日：1993-09-10

    申请人： Yuichi Shimasaki ,  Kazutomo Sawamura ,  Kenichi Maeda ,  Shigetaka Kuroda

    发明人： Yuichi Shimasaki ,  Kazutomo Sawamura ,  Kenichi Maeda ,  Shigetaka Kuroda

    IPC分类号： F02D45/00 ,  F02B75/02 ,  G01M15/11 ,  G01M15/00

    CPC分类号： G01M15/11 ,  F02B2075/027

    摘要： A combustion state-detecting system, for internal combustion engines, has a crank angle sensor. The crank angle sensor generates a crank angle signal with a predetermined period shorter than a firing period of the engine whenever the crankshaft rotates through a predetermined angle. A value of the rotational speed of the engine is detected whenever the crank angle signal is generated. A first average value of the detected engine rotational speed is calculated over a period of one rotation of the crankshaft, followed by calculating a second average value of the first average value over every firing period, to thereby calculate a rate of variation in the second average value over every firing period. The rate of variation is compared with a predetermined value, to determine whether or not the engine is in a degraded state of combustion.

    摘要翻译： 用于内燃机的燃烧状态检测系统具有曲柄角传感器。 每当曲轴旋转预定角度时，曲轴转角传感器产生比发动机的燃起时间短的预定时间段的曲轴转角信号。 每当产生曲轴转角信号时，检测发动机转速的值。 在曲轴的一次旋转的周期内计算检测到的发动机转速的第一平均值，然后计算每个点火期间的第一平均值的第二平均值，从而计算第二平均值的变化率 每个发射期间的价值。 将变化率与预定值进行比较，以确定发动机是否处于劣化的燃烧状态。

    Combustion state-detecting system for internal combustion engines
    2.
    发明授权
    Combustion state-detecting system for internal combustion engines 失效
    内燃机燃烧状态检测系统

    公开(公告)号：US5373732A

    公开(公告)日：1994-12-20

    申请号：US149921

    申请日：1993-11-10

    申请人： Shigetaka Kuroda ,  Kazutomo Sawamura ,  Kenichi Maeda ,  Yuichi Shimasaki

    发明人： Shigetaka Kuroda ,  Kazutomo Sawamura ,  Kenichi Maeda ,  Yuichi Shimasaki

    IPC分类号： F02D45/00 ,  G01M15/11 ,  G01M15/00

    CPC分类号： G01M15/11

    摘要： A combustion state-detecting system for an internal combustion engine calculates a first average speed by averaging the rotational speed of the engine over a time period corresponding to duration of one stroke of a cylinder, and a second average speed by averaging the rotational speed of the engine over a time period corresponding to duration of one cycle of all strokes of the cylinder. The system calculates a difference between the first average speed and the second average speed, and determines based on the difference whether or not the combustion state of the engine is abnormal.

    摘要翻译： 用于内燃机的燃烧状态检测系统通过在对应于气缸的一个行程的持续时间的时间段内对发动机的转速进行平均来计算第一平均速度，并且通过对发动机的转速进行平均来平均第二平均速度 发动机在对应于气缸的所有冲程的一个循环的持续时间的时间段内。 系统计算第一平均速度和第二平均速度之差，并且基于发动机的燃烧状态是否异常的差来确定。

    Combustion state-detecting system for internal combustion engines
    3.
    发明授权
    Combustion state-detecting system for internal combustion engines 失效
    内燃机燃烧状态检测系统

    公开(公告)号：US5493901A

    公开(公告)日：1996-02-27

    申请号：US120832

    申请日：1993-09-15

    申请人： Shigetaka Kuroda ,  Yuichi Shimasaki ,  Kazutomo Sawamura

    发明人： Shigetaka Kuroda ,  Yuichi Shimasaki ,  Kazutomo Sawamura

    IPC分类号： F02D45/00 ,  F02B75/02 ,  G01M15/11 ,  G01M15/00

    CPC分类号： G01M15/11 ,  F02B2075/027

    摘要： A combustion state-detecting system for internal combustion engines has a crank angle sensor which generates a crank angle signal with a predetermined period shorter than a firing period of the engine whenever the crankshaft rotates through a predetermined angle. A value of the rotational speed of the engine is detected whenever the crank angle signal is generated. A first average value of the detected engine rotational speed is calculated over every period of one rotation of the crankshaft, followed by calculating a second average value of the first average value over every firing period, to thereby calculate a rate of variation in the second average value over every firing period. Values of the rate of variation are averaged over a predetermined number of ignition cycles of the engine, to obtain a third average value. A cumulative value of the absolute value of a difference between the third average value and the rate of variation is calculated over the above predetermined number of ignition cycles. The cumulative value is compared with a predetermined value, to determine that the engine is in a degraded state of combustion, when the cumulative value exceeds the predetermined value.

    摘要翻译： 用于内燃机的燃烧状态检测系统具有曲柄角传感器，其在曲轴旋转预定角度时产生具有比发动机的燃烧时间短的预定时间段的曲柄角信号。 每当产生曲轴转角信号时，检测发动机转速的值。 在曲轴的一个旋转周期中计算检测到的发动机转速的第一平均值，然后计算每个点火期间的第一平均值的第二平均值，从而计算第二平均值的变化率 每个发射期间的价值。 在发动机的预定数量的点火循环中平均变化率的值，以获得第三平均值。 在上述预定数量的点火循环中计算第三平均值和变化率之差的绝对值的累积值。 当累积值超过预定值时，将累积值与预定值进行比较，以确定发动机处于劣化的燃烧状态。