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公开(公告)号：EP0744608A3
公开(公告)日：1998-12-30
申请号：EP96202165
申请日：1993-06-08
发明人： MATSUMOTO TAKUYA , HASHIMOTO TORU , MIYAKE MITSUHIRO , YOSHIDA YASUHISA , YANAGISAWA MITSUHIKO , NAKAJIMA HIROYUKI , NAMIKI KOICHI
CPC分类号： G01M15/11 , F02D41/1498 , F02D2200/1015
摘要： A misfire detection method is provided, which method makes it possible to accurately detect the occurrence/absence of misfire by eliminating a detection error in misfire detection, which error is caused by a vibrational increase or decrease of the rotational changing rate of a crankshaft after a misfire state occurs, and which method does not require any special hardware for that purpose. A processor, which receives pulse outputs from a crank angle sensor, calculates in sequence angular accelerations Dω
n-2 , Dω
n-1 , Dω
n , and Dω
n+1 in crank angle areas which correspond to a preceding cylinder. two cylinders checked for misfire, and a succeeding cylinder, respectively. If the values Dω
n-1 and Dω
n significantly decrease in comparison with the values Dω
n-2 and Dω
n-1 , respectively, then it is tentatively determined that misfire has occurred in both cylinders checked. Then if the value Dω
n+1 significantly increases in comparison with the value Dω
n , then the restoration to the normal combustion state is confirmed, and the occurrence of misfire in the two cylinders checked is definitely determined.摘要翻译： 提供了一种失火检测方法，通过消除失火检测中的检测误差，该方法使得可以精确地检测失火的发生/不存在，该失误检测中的误差是由曲轴的旋转变化率的振动增大或减小 失火状态发生，并且哪种方法不需要用于该目的的特殊硬件。 接收来自曲轴转角传感器的脉冲输出的处理器依次计算与前一气缸相对应的曲柄角区域中的角加速度Dωn-2，Dωn-1，Dωn和Dωn + 1。 两个气缸分别检查失火和一个后续气缸。 如果值Dωn-1和Dωn分别与值Dωn-2和Dωn-1相比显着降低，则暂时确定在检查的两个气缸中发生了失火。 然后，如果值Dωn + 1与值Dωn相比显着增加，则确认恢复到正常燃烧状态，并且确认所检查的两个汽缸中失火的发生。
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公开(公告)号：EP0744610A3
公开(公告)日：1998-12-30
申请号：EP96202167
申请日：1993-06-08
发明人： MATSUMOTO TAKUYA , HASHIMOTO TORU , MIYAKE MITSUHIRO , YOSHIDA YASUHISA , YANAGISAWA MITSUHIKO , NAKAJIMA HIROYUKI , NAMIKI KOICHI
CPC分类号： G01M15/11 , F02D41/1498 , F02D2200/1015
摘要： A misfire detection method is provided, which method makes it possible to accurately detect the occurrence/absence of misfire by eliminating a detection error in misfire detection, which error is caused by a vibrational increase or decrease of the rotational changing rate of a crankshaft after a misfire state occurs, and which method does not require any special hardware for that purpose. A processor, which receives pulse outputs from a crank angle sensor, calculates in sequence angular accelerations Dω
n-2 , Dω
n-1 , Dω
n , and Dω
n-1 in crank angle areas which correspond to a preceding cylinder, two cylinders checked for misfire, and a succeeding cylinder, respectively. If the values Dω
n-1 and Dω
n significantly decrease in comparison with the values Dω
n-2 and Dω
n-1 , respectively, then it is tentatively determined that misfire has occurred in both cylinders checked. Then if the value Dω
n-1 significantly increases in comparison with the value Dω
n , then the restoration to the normal combustion state is confirmed, and the occurrence of misfire in the two cylinders checked is definitely determined.摘要翻译： 提供了一种失火检测方法，通过消除失火检测中的检测误差，该方法使得可以精确地检测失火的发生/不存在，该失误检测中的误差是由曲轴的旋转变化率的振动增大或减小 失火状态发生，并且哪种方法不需要用于该目的的特殊硬件。 接收来自曲轴转角传感器的脉冲输出的处理器按顺序计算与先前气缸相对应的曲柄角区域中的角加速度Dωn-2，Dωn-1，Dωn和Dωn-1，检查两个气缸 失火以及后续的气缸。 如果值Dωn-1和Dωn分别与值Dωn-2和Dωn-1相比显着降低，则暂时确定在检查的两个气缸中发生了失火。 然后，如果值Dωn-1与值Dωn相比显着增加，则确认恢复到正常燃烧状态，并且确认所检查的两个汽缸中的失火的发生。
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公开(公告)号：EP0744609A3
公开(公告)日：1998-12-30
申请号：EP96202166
申请日：1993-06-08
发明人： MATSUMOTO TAKUYA , HASHIMOTO TORU , MIYAKE MITSUHIRO , YOSHIDA YASUHISA , YANAGISAWA MITSUHIKO , NAKAJIMA HIROYUKI , NAMIKI KOICHI
CPC分类号： G01M15/11 , F02D41/1498 , F02D2200/1015
摘要： A misfire detection method is provided. which method makes it possible to accurately detect the occurrence/absence of misfire by eliminating a detection error in misfire detection, which error is caused by a vibrational increase or decrease of the rotational changing rate of a crankshaft after a misfire state occurs, and which method does not require any special hardware for that purpose. A processor, which receives pulse outputs from a crank angle sensor. calculates in sequence angular accelerations Dω
n-2 , Dω
n-1 , Dω
n , and Dω
n+1 in crank angle areas which correspond to a preceding cylinder, two cylinders checked for misfire, and a succeeding cylinder, respectively. If the values Dω
n-1 and Dω
n significantly decrease in comparison with the values Dω
n-2 and Dω
n-1 , respectively. then it is tentatively determined that misfire has occurred in both cylinders checked. Then if the value Dω
n+1 significantly increases in comparison with the value Dω
n , then the restoration to the normal combustion state is confirmed, and the occurrence of misfire in the two cylinders checked is definitely determined.-
公开(公告)号：EP1211395A4
公开(公告)日：2004-08-04
申请号：EP01943882
申请日：2001-06-29
发明人： NAKAJIMA HIROYUKI , SUZAWA TAKUMI , SETO HIROKUNI , TASHIRO KEISUKE , NAKAYAMA OSAMU , TANIGUCHI SHIGEYOSHI , GOTOH HIDEKI
CPC分类号： B01D53/945 , B01D53/944 , B01J37/0244 , F01N3/0814 , F01N3/0842 , F01N3/20 , F01N3/2803 , F01N2510/06 , F01N2570/12 , Y02T10/22
摘要： A catalyst device for clarification of exhaust gas which is disposed in an exhausting route of an internal combustion engine capable of being operated at least at theoretical and lean air-fuel ratios, characterized in that it has a three component catalyst (4) comprising an inner layer (12a) containing primarily rhodium as a noble metal activating in a reduced oxygen content atmosphere and a surface layer (12b) containing primarily platinum or palladium as a noble metal activating in a enhanced oxygen content atmosphere. The catalyst device effectively removes HC due to activation of platinum or palladium in lean operation and, when O2 is temporarily short in the change from lean to stoichiometric air-fuel ratio, removes HC by supplementing O2 through utilizing the function of platinum or palladium to store O2, and as a result prevents the temporary great decrease of its ability to remove HC. Accordingly, the catalyst device secures the satisfactory performance of removing HC even in lean region without the increase of the amount of a noble metal in the three component catalyst.
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公开(公告)号：EP0708234A3
公开(公告)日：1998-12-30
申请号：EP95203468
申请日：1993-06-08
发明人： MATSUMOTO TAKUYA , HASHIMOTO TORU , MIYAKE MITSUHIRO , YOSHIDA YASUHISA , YANAGISAWA MITSUHIKO , NAKAJIMA HIROYUKI , NAMIKI KOICHI , KASAI SATOSHI
CPC分类号： F02D41/22 , F02D41/0097 , F02D41/1498 , F02D41/222 , F02D2200/1015 , F02D2200/702 , G01M15/11
摘要： A method for detecting misfire by fluctuation in crankshaft rotation in which the occurrence of misfire can be detected exactly by eliminating the effect of detection error in detecting the fluctuation in crankshaft rotation, caused by the error in the construction of a crank angle sensor. By succeedingly receiving pulses from the crank angle sensor, a processor detects a time interval taken from the entering into a crankshaft rotation angle region, relating to a cylinder corresponding to both pulses, to the leaving therefrom (S2), calculates the crankshaft angular acceleration Dω
n by using the correction factor calculated on the basis of the above detected time interval, and the time interval determined by dividing the time taken for one rotation of crankshaft by the number of cylinders (S3, S4), the latter interval being free from sensor error, and detects the occurrence of misfire when the calculated value Dω
n is less than the decision value (S5 through S7).摘要翻译： 通过利用曲轴的旋转变化来检测失火的方法，其能够在消除的检测误差的影响下精确地检测失火的发生，这归因于在检测变化中使用的曲柄角传感器的结构误差 曲轴的旋转。 当处理器从曲柄角传感器顺序接收脉冲时，它检测（S2）检测操作进入曲轴相对于两个脉冲的圆柱体的旋转角度的区域中的一段时间的长度，并且 离开同一地区的同一行动。 通过使用校正因子来计算曲轴的角加速度Dωn（S3，S4），该校正因子是根据检测到的时间长度和没有操作误差的时间长度而确定的 并通过将曲轴的一圈所需的时间除以气缸的数量来确定。 当计算值D omega n小于判断值时，检测到失火的发生（S5-S7）。
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