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    Combustion state-detecting system for internal combustion engines
    34.
    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：US5471869A

    公开(公告)日：1995-12-05

    申请号：US303683

    申请日：1994-09-09

    申请人： Shigetaka Kuroda ,  Toshihiko Sato ,  Tsuyoshi Takizawa

    发明人： Shigetaka Kuroda ,  Toshihiko Sato ,  Tsuyoshi Takizawa

    IPC分类号： F02D45/00 ,  F02B75/02 ,  F02P17/12 ,  G01M15/11 ,  G01M15/00

    CPC分类号： G01M15/11 ,  F02B2075/027

    摘要： A combustion state-detecting system for an internal combustion engine is provided, which detects misfires occurring in the engine. A 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. An ECU detects the rotational speed of the engine, based on the crank angle signal whenever the crank angle signal is generated to generate a rotational speed signal, and filters the rotational speed signal to extract a specific frequency component therefrom. A rate of variation in the extracted specific frequency component is calculated every first predetermined time period, and an average value of the rate of variation is calculated every second predetermined time period longer than the first predetermined time period. Further, the difference between the average value and the rate of variation is calculated, and absolute values of the difference is cumulated over the second predetermined time period to obtain a difference cumulative value. Then, the difference cumulative value is compared with a predetermined value, and it is determined that the engine is in a continuous degraded combustion state when the difference cumulative value has continued to exceed the predetermined value, and that the engine is in a sporadic degraded combustion state when the difference cumulative value once exceeds the predetermined value once and then becomes smaller than the predetermined value, before it again exceeds the predetermined value.

    摘要翻译： 提供了一种用于内燃机的燃烧状态检测系统，其检测发动机中发生的失火。 每当曲轴旋转预定角度时，曲柄角传感器产生具有比发动机的点火时间短的预定时间段的曲轴转角信号。 只要产生曲柄角信号，ECU就基于曲柄角信号来检测发动机的转速，以产生转速信号，并且对转速信号进行滤波以从中提取特定的频率分量。 在每第一预定时间段计算提取的特定频率分量的变化率，并且每隔一个预定时间段计算比第一预定时间段更长的变化率的平均值。 此外，计算平均值和变化率之间的差异，并且在第二预定时间段内累积差异的绝对值以获得差值累积值。 然后，将差累计值与预定值进行比较，并且当差累积值继续超过预定值并且发动机处于零星劣化燃烧时，确定发动机处于连续劣化燃烧状态 当差值累积值一次超过预定值一次然后变得小于预定值时，再次超过预定值。

    Tank internal pressure-detecting device for internal combustion engines
    35.
    再颁专利
    Tank internal pressure-detecting device for internal combustion engines 失效
    内燃机油箱内压检测装置

    公开(公告)号：USRE35054E

    公开(公告)日：1995-10-10

    申请号：US270778

    申请日：1994-07-05

    申请人： Masataka Chikamatsu ,  Masayoshi Yamanaka ,  Hiroshi Maruyama ,  Shigetaka Kuroda ,  Kazutomo Sawamura

    发明人： Masataka Chikamatsu ,  Masayoshi Yamanaka ,  Hiroshi Maruyama ,  Shigetaka Kuroda ,  Kazutomo Sawamura

    IPC分类号： F02M37/00 ,  F02M25/08 ,  F02M33/02

    CPC分类号： F02M25/0809

    摘要： A tank internal pressure-detecting device for an internal combustion engine having an evaporative emission control system for controlling purging of evaporative fuel generated in a fuel tank thereof into an intake system thereof. An ECU interrupts purging of evaporative fuel by the evaporative emission control system for a predetermined period of time after the engine is started. The ECU causes control valves of the evaporative emission control system to open the interior of the fuel tank to the atmosphere, and stores a value of pressure within the fuel tank detected by a tank internal pressure sensor as a reference value while the purging is being interrupted and at the same time the interior of the fuel tank is opened to the atmosphere. The ECU corrects an output value of the tank internal pressure sensor, based upon the reference value stored.

    摘要翻译： 一种用于内燃机的罐内压检测装置，具有蒸发排放控制系统，用于控制在其燃料箱中产生的蒸发燃料的清洗进入其进气系统。 发动机启动后，ECU将通过蒸发排放控制系统中断预定时间段内的蒸发燃料的清除。 ECU使蒸发排放控制系统的控制阀将燃料箱的内部打开到大气中，并且在吹扫中断期间将由罐内压力传感器检测到的燃料箱内的压力值存储为参考值 并且同时燃料箱的内部向大气敞开。 ECU根据存储的参考值校正油箱内部压力传感器的输出值。

    Combustion state-detecting system for internal combustion engines
    36.
    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：US5390537A

    公开(公告)日：1995-02-21

    申请号：US149913

    申请日：1993-11-10

    申请人： Shigetaka Kuroda ,  Kenichi Maeda ,  Kazutomo Sawamura ,  Hiroshi Maruyama

    发明人： Shigetaka Kuroda ,  Kenichi Maeda ,  Kazutomo Sawamura ,  Hiroshi Maruyama

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

    CPC分类号： G01M15/11

    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 spark plug 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 rate of variation in the detected value of the rotational speed of the engine is calculated over the firing period of the spark plug, and an average value thereof is then calculated. The calculated average value of the variation rate is compared with the calculated variation rate, and a cumulative value of a difference between the calculated variation rate average value and the calculated variation rate is calculated when the calculated variation rate is on the larger deceleration side of the engine rotational speed with respect to the calculated variation rate average value. The calculated difference cumulative value is compared with a predetermined value to determine whether or not the engine is in a degraded combustion state, based on the comparison result.

    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，其产生比火花塞的燃烧时间短的预定时段的曲柄角信号。 每当产生曲轴转角信号时，检测发动机转速的值。 在火花塞的点火期间计算发动机的转速的检测值的变化率，然后计算其平均值。 将所计算的变化率的平均值与计算出的变化率进行比较，计算出的变化率平均值与计算出的变化率之差的累计值，在计算出的变化率在 发动机转速相对于计算的变化率平均值。 将计算的差分累计值与预定值进行比较，以基于比较结果来确定发动机是否处于劣化燃烧状态。

    Device for detecting deterioration of a catalyst temperature sensor
    37.
    发明授权
    Device for detecting deterioration of a catalyst temperature sensor 失效
    用于检测催化剂温度传感器的劣化的装置

    公开(公告)号：US5388454A

    公开(公告)日：1995-02-14

    申请号：US164685

    申请日：1993-12-08

    申请人： Shigetaka Kuroda ,  Yoichi Iwata

    发明人： Shigetaka Kuroda ,  Yoichi Iwata

    IPC分类号： F02D45/00 ,  F01N3/00 ,  F01N3/28 ,  F02D41/22 ,  G01M15/00

    CPC分类号： F02D41/22 ,  Y02T10/40

    摘要： A device for detecting deterioration of a catalyst temperature sensor which detects the temperature of a three-way catalyst arranged in the exhaust pipe of an internal combustion engine, judges that the sensor has deteriorated when the difference between the actual output value from the catalyst temperature sensor and a reference value based on predetermined engine operating parameters exceeds a predetermined value while the engine is in a predetermined operating condition.

    摘要翻译： 用于检测催化剂温度传感器的劣化的装置，其检测布置在内燃机的排气管中的三元催化剂的温度，当来自催化剂温度传感器的实际输出值 并且当发动机处于预定操作状态时，基于预定的发动机操作参数的参考值超过预定值。

    Misfire detecting apparatus for internal combustion engine
    40.
    发明授权
    Misfire detecting apparatus for internal combustion engine 有权

    公开(公告)号：US10378468B2

    公开(公告)日：2019-08-13

    申请号：US13410337

    申请日：2012-03-02

    申请人： Keisuke Minatoya ,  Atsushi Izumiura ,  Tadayoshi Sasaki ,  Shigetaka Kuroda ,  Mahito Shikama

    发明人： Keisuke Minatoya ,  Atsushi Izumiura ,  Tadayoshi Sasaki ,  Shigetaka Kuroda ,  Mahito Shikama

    IPC分类号： G01M15/04 ,  F02D41/14 ,  G01M15/11 ,  F02P5/15

    摘要： A misfire detecting apparatus for an internal combustion engine is provided. The engine has an output shaft connected via a torsion element to an input shaft of a transmission mechanism. A transmission rotational speed parameter indicative of a rotational speed of the input shaft is detected. A modified engine rotational speed parameter is calculated by modifying the detected engine rotational speed parameter based on the transmission rotational speed parameter, an engine rotation moment on the input side of the torsion element, and a transmission rotation moment on the output side of the torsion element. An average change amount of the modified rotational speed parameter, and an inertia speed changing component, are calculated. Further, a corrected rotational speed parameter is calculated by correcting the modified rotational speed parameter according to the average change amount and the inertia speed changing component. A relative speed parameter is calculated based on the corrected rotational speed parameter, and a determination parameter is calculated by integrating the relative speed parameter. The misfire determination is performed based on the determination parameter.