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1.发明申请公开(公告)号：US20110191005A1
公开(公告)日：2011-08-04
申请号：US13020878
申请日：2011-02-04
申请人： Yasushi Iwazaki , Mie Sasai , Hiroshi Sawada , Hiroshi Miyamoto , Keiji Imamura
发明人： Yasushi Iwazaki , Mie Sasai , Hiroshi Sawada , Hiroshi Miyamoto , Keiji Imamura
摘要： An apparatus for detecting an abnormal air-fuel ratio variation among cylinders of a multi-cylinder internal combustion engine includes: a catalyst that is arranged in an exhaust passage of the multi-cylinder internal combustion engine; a catalyst temperature detecting unit that detects a temperature of the catalyst; and an abnormality detecting unit that detects an abnormal air-fuel ratio variation among the cylinders on the basis of the detected catalyst temperature, wherein the abnormality detecting unit calculates a temperature parameter on the basis of the detected catalyst temperature, and the abnormality detecting unit detects the abnormal air-fuel ratio variation among the cylinders on the basis of the temperature parameter at the time when a predetermined period of time has elapsed after a cold start of the internal combustion engine.
摘要翻译： 一种用于检测多缸内燃机的气缸之间的异常空燃比变动的装置，包括：设置在所述多缸内燃机的排气通路中的催化剂; 催化剂温度检测单元，其检测催化剂的温度; 以及异常检测单元，其基于检测到的催化剂温度来检测气缸之间的异常空燃比变动，其中异常检测单元基于检测到的催化剂温度计算温度参数，异常检测单元检测 基于在内燃机的冷启动之后经过预定时间段时的温度参数，气缸之间的异常空燃比变化。
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2.发明授权公开(公告)号：US08024105B2
公开(公告)日：2011-09-20
申请号：US12416262
申请日：2009-04-01
IPC分类号： F02D41/22
CPC分类号： F01N11/00 , F01N3/10 , F01N2550/02 , F01N2560/06 , Y02T10/47
摘要： An apparatus and a method for detecting abnormal air-fuel ratio variation among cylinders of a multi-cylinder internal combustion engine are provided. The apparatus includes: a catalyst that is provided in an exhaust passage of the multi-cylinder internal combustion engine; a catalyst temperature detection unit that detects a temperature of the catalyst; a catalyst temperature estimation unit that estimates a temperature of the catalyst based on an engine operating state; and an abnormality detection unit that determines whether abnormal air-fuel ratio variation among the cylinders has occurred based on the detected temperature of the catalyst and the estimated temperature of the catalyst.
摘要翻译： 提供一种用于检测多缸内燃机的气缸之间的异常空燃比变动的装置和方法。 该装置包括：设置在多气缸内燃机的排气通路中的催化剂; 催化剂温度检测单元，其检测催化剂的温度; 催化剂温度估计单元，其基于发动机运转状态来估计催化剂的温度; 以及异常检测单元，其基于检测到的催化剂的温度和催化剂的估计温度来判定是否发生了气缸之间的异常空燃比变动。
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3.发明授权公开(公告)号：US08047064B2
公开(公告)日：2011-11-01
申请号：US12393597
申请日：2009-02-26
IPC分类号： G01M15/10
CPC分类号： G01M15/104 , F02D41/0085 , F02D41/1441 , F02D41/1456
摘要： An apparatus or a method for detecting an abnormality of inter-cylinder air-fuel ratio dispersion in a multi-cylinder internal combustion engine according to the invention is equipped with a catalytic element that purifies exhaust gas of hydrogen, a first air-fuel ratio sensor that detects an air-fuel ratio of exhaust gas that has not passed through the catalytic element, a second air-fuel ratio sensor that detects an air-fuel ratio of exhaust gas that has passed through the catalytic element, a device that detects an abnormality of inter-cylinder air-fuel ratio dispersion on the basis of a divergence state of a detected value of a second air-fuel ratio to a lean side from a detected value of a first air-fuel ratio, and a device that forcibly reduces fuel injection amounts in cylinders individually when an abnormality on dispersion is detected by the abnormality detector, detects a divergence state of the detected value of the second air-fuel ratio to the lean side from the detected value of the first air-fuel ratio at this time, and specifies as an abnormal cylinder that one of the cylinders in which a value indicating this divergence state has become smaller than at a time of detection of the abnormality of dispersion.
摘要翻译： 根据本发明的用于检测多缸内燃机中的缸内空燃比分散异常的装置或方法装备有净化氢气废气的催化元件，第一空燃比传感器 检测未通过催化剂元件的废气的空燃比，检测通过催化元件的废气的空燃比的第二空燃比传感器，检测异常的装置 基于第一空燃比对第一空燃比的检测值与第一空燃比的检测值的偏差状态的液压缸间空燃比的分散，以及强制地减少燃料的装置 当由异常检测器检测到异常异常时，分别在气缸中的喷射量，从检测到的va检测到第二空气燃料比的检测值与偏斜侧的发散状态 此时指定第一空燃比，并且指定作为异常气缸，其中指示该发散状态的值的气缸中的一个已经变得比检测到色散异常时的小。
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4.发明申请公开(公告)号：US20090211350A1
公开(公告)日：2009-08-27
申请号：US12393597
申请日：2009-02-26
IPC分类号： G01M15/10
CPC分类号： G01M15/104 , F02D41/0085 , F02D41/1441 , F02D41/1456
摘要： An apparatus or a method for detecting an abnormality of inter-cylinder air-fuel ratio dispersion in a multi-cylinder internal combustion engine according to the invention is equipped with a catalytic element that purifies exhaust gas of hydrogen, a first air-fuel ratio sensor that detects an air-fuel ratio of exhaust gas that has not passed through the catalytic element, a second air-fuel ratio sensor that detects an air-fuel ratio of exhaust gas that has passed through the catalytic element, a device that detects an abnormality of inter-cylinder air-fuel ratio dispersion on the basis of a divergence state of a detected value of a second air-fuel ratio to a lean side from a detected value of a first air-fuel ratio, and a device that forcibly reduces fuel injection amounts in cylinders individually when an abnormality on dispersion is detected by the abnormality detector, detects a divergence state of the detected value of the second air-fuel ratio to the lean side from the detected value of the first air-fuel ratio at this time, and specifies as an abnormal cylinder that one of the cylinders in which a value indicating this divergence state has become smaller than at a time of detection of the abnormality of dispersion.
摘要翻译： 根据本发明的用于检测多缸内燃机中的缸内空燃比分散异常的装置或方法装备有净化氢气废气的催化元件，第一空燃比传感器 检测未通过催化剂元件的废气的空燃比，检测通过催化元件的废气的空燃比的第二空燃比传感器，检测异常的装置 基于第一空燃比对第一空燃比的检测值与第一空燃比的检测值的偏差状态的液压缸间空燃比的分散，以及强制地减少燃料的装置 当由异常检测器检测到异常异常时，分别在气缸中的喷射量，从检测到的va检测到第二空气燃料比的检测值与偏斜侧的发散状态 此时指定第一空燃比，并且指定作为异常气缸，其中指示该发散状态的值的气缸中的一个已经变得比检测到色散异常时的小。
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公开(公告)号：US08534046B2
公开(公告)日：2013-09-17
申请号：US12812350
申请日：2009-02-27
申请人： Hiroshi Miyamoto , Toru Kidokoro , Hiroshi Sawada , Yasushi Iwazaki , Koichi Kimura , Koichi Kitaura
发明人： Hiroshi Miyamoto , Toru Kidokoro , Hiroshi Sawada , Yasushi Iwazaki , Koichi Kimura , Koichi Kitaura
IPC分类号： F01N3/00
CPC分类号： F01N11/007 , F01N11/00 , F02D41/0235 , F02D41/1441 , F02D2200/0816 , Y02T10/47
摘要： A catalyst deterioration diagnosing apparatus is provided with means for performing stoichiometric feedback control on the air-fuel ratio based on at least output from an upstream air-fuel ratio sensor provided upstream of a catalyst, means for measuring the oxygen storage capacity of the catalyst, and means for correcting the measured value of the oxygen storage capacity based on at least the output behavior of a downstream air-fuel ratio sensor provided downstream of the catalyst during the stoichiometric feedback control. The measured value of the oxygen storage capacity is corrected using the output behavior of the downstream air-fuel ratio sensor during stoichiometric feedback control. The diagnostic is performed after eliminating the effects from sulfur by correcting the measured value to a value corresponding to when low sulfur fuel is used, which makes it possible to prevent an erroneous diagnosis from being made.
摘要翻译： 催化剂劣化诊断装置具有至少基于设置在催化剂上游的上游空燃比传感器的输出而对空燃比进行化学计量反馈控制的装置，用于测量催化剂的储氧能力的装置， 以及用于在化学计量反馈控制期间至少基于设置在催化剂下游的下游空燃比传感器的输出特性来校正储氧能力的测量值的装置。 在化学计量反馈控制中，使用下游空燃比传感器的输出特性来校正储氧容量的测量值。 在通过将测量值校正为与使用低硫燃料时相对应的值来消除硫的影响之后执行诊断，这使得可以防止进行错误的诊断。
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6.发明授权公开(公告)号：US08510017B2
公开(公告)日：2013-08-13
申请号：US12847300
申请日：2010-07-30
IPC分类号： F02D41/14
CPC分类号： F02D41/0085 , F02D41/1441 , F02D41/1475
摘要： A cylinder-to-cylinder air/fuel ratio imbalance determination system obtains an imbalance determination parameter that increases or decreases as a difference between the air/fuel ratios of different cylinders increases, based on output values of an air/fuel ratio sensor, and makes a cylinder-to-cylinder A/F imbalance determination, based on the result of comparison between the imbalance determination parameter and a threshold value for imbalance determination. The determination system changes the amount of fuel injected into one or more of the cylinders so as to create a forced imbalance condition in which the air/fuel ratio of a particular cylinder deviates from the air/fuel ratio of the remaining cylinders, and obtains an air/fuel ratio sensor evaluation parameter (e.g., rate of change ΔAF of the detected air/fuel ratio) in this condition. Then, the determination system determines whether the air/fuel ratio sensor is adequate for making a cylinder-to-cylinder A/F imbalance determination, by comparing the evaluation parameter with a reference parameter (an evaluation parameter obtained based on output values of a reference air/fuel ratio sensor in the same forced imbalance condition).
摘要翻译： 基于空/燃比传感器的输出值，气缸对气缸空气/燃料比不平衡确定系统获得不同气缸的空气/燃料比之间的差异增大或减小的不平衡确定参数，并且 基于不平衡确定参数和不平衡确定的阈值之间的比较结果，确定缸到缸的A / F不平衡。 确定系统改变喷射到一个或多个气缸中的燃料量，以产生特定气缸的空气/燃料比偏离剩余气缸的空气/燃料比的强制不平衡状态，并获得 空气/燃料比传感器评估参数（例如，检测到的空气/燃料比的变化率ΔAFAF）。 然后，判定系统通过将评价参数与参考参数（基于参考的输出值获得的评估参数）进行比较来判定空气/燃料比传感器是否足以进行气缸到气缸A / F不平衡的确定 空气/燃料比传感器处于相同的强制不平衡状态）。
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7.发明授权公开(公告)号：US08401765B2
公开(公告)日：2013-03-19
申请号：US13516841
申请日：2009-12-18
CPC分类号： F02D41/0085 , F02D41/1454 , F02D41/1494 , F02D41/1498 , F02D2250/14
摘要： An inter-cylinder air-fuel ratio imbalance determination apparatus that obtains, based on an output value Vabyfs of an air-fuel ratio sensor, an air-fuel ratio fluctuation indicating amount (AFD) which becomes larger as an air-fuel ratio fluctuation of an exhaust gas passing through a position at which the air-fuel ratio sensor is disposed becomes larger, during a parameter obtaining period. The determination apparatus estimates an air-fuel ratio sensor element temperature (Temps) having a strong relation with responsiveness of the air-fuel ratio sensor during the parameter obtaining period, and obtains a corrected air-fuel ratio fluctuation indicating amount by correcting the AFD based on the estimated Temps. The determination apparatus adopts the corrected air-fuel ratio fluctuation indicating amount as the imbalance determination parameter X, and determines whether or not an inter-cylinder air-fuel-ratio imbalance state has been occurring based on a comparison between the imbalance determination parameter X and the imbalance determination threshold Xth.
摘要翻译： 一种空转燃料比不平衡确定装置，其基于空燃比传感器的输出值Vabyfs，获得作为空燃比变动的空燃比变动指数（AFD）变大的空燃比变动指示量 在参数获取期间，通过设置有空燃比传感器的位置的排气变大。 确定装置估计在参数获取期间与空燃比传感器的响应性有很强关系的空燃比传感器元件温度（Temps），并且通过校正AFD来获得经校正的空燃比波动指示量 在估计的Temps。 确定装置采用校正的空燃比变动指示量作为不平衡判定参数X，并且基于不平衡确定参数X与不平衡确定参数X之间的比较来确定是否已经发生了缸间空燃比不平衡状态 不平衡判定阈值Xth。
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8.发明申请公开(公告)号：US20120277980A1
公开(公告)日：2012-11-01
申请号：US13516841
申请日：2009-12-18
CPC分类号： F02D41/0085 , F02D41/1454 , F02D41/1494 , F02D41/1498 , F02D2250/14
摘要： An inter-cylinder air-fuel ratio imbalance determination apparatus that obtains, based on an output value Vabyfs of an air-fuel ratio sensor, an air-fuel ratio fluctuation indicating amount (AFD) which becomes larger as an air-fuel ratio fluctuation of an exhaust gas passing through a position at which the air-fuel ratio sensor is disposed becomes larger, during a parameter obtaining period. The determination apparatus estimates an air-fuel ratio sensor element temperature (Temps) having a strong relation with responsiveness of the air-fuel ratio sensor during the parameter obtaining period, and obtains a corrected air-fuel ratio fluctuation indicating amount by correcting the AFD based on the estimated Temps. The determination apparatus adopts the corrected air-fuel ratio fluctuation indicating amount as the imbalance determination parameter X, and determines whether or not an inter-cylinder air-fuel-ratio imbalance state has been occurring based on a comparison between the imbalance determination parameter X and the imbalance determination threshold Xth.
摘要翻译： 一种空转燃料比不平衡确定装置，其基于空燃比传感器的输出值Vabyfs，获得作为空燃比变动的空燃比变动指数（AFD）变大的空燃比变动指示量 在参数获取期间，通过设置有空燃比传感器的位置的排气变大。 确定装置估计在参数获取期间与空燃比传感器的响应性有很强关系的空燃比传感器元件温度（Temps），并且通过校正AFD来获得经校正的空燃比波动指示量 在估计的Temps。 确定装置采用校正的空燃比变动指示量作为不平衡判定参数X，并且基于不平衡确定参数X与不平衡确定参数X之间的比较来确定是否已经发生了缸间空燃比不平衡状态 不平衡判定阈值Xth。
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9.发明授权公开(公告)号：US08560208B2
公开(公告)日：2013-10-15
申请号：US13505849
申请日：2009-11-05
IPC分类号： B60T7/12
CPC分类号： F02D41/0085 , F02D41/0065 , F02D41/1454 , Y02T10/47
摘要： An inter-cylinder air-fuel ratio imbalance determination apparatus (determination apparatus) according to the present invention obtains, as an “EGR supplying state imbalance determination parameter”, a value corresponding to a differential value d(abyfs)dt of a detected air-fuel ratio abyfs represented by an output value of an air-fuel ratio sensor when an EGR gas is being supplied, and obtains, as an “EGR stop state imbalance determination parameter”, a value corresponding to a differential value d(abyfs)dt when an EGR gas supply is being stopped. The determination apparatus obtains an “EGR-causing imbalance determination parameter Pegr” by subtracting the EGR stop state imbalance determination parameter Poff from the EGR supplying state imbalance determination parameter Pon, and determines that an inter-cylinder air-fuel ratio imbalance state has occurred due to the supply of the EGR gas when the parameter Pegr is larger than a threshold Pegrth.
摘要翻译： 根据本发明的气缸内空燃比不平衡判定装置（判定装置），作为“EGR供给状态不平衡判定参数”，获得与检测到的空气 - 燃料比不平衡判定装置的差分值d（abyfs）dt对应的值， 在EGR气体供给时由空燃比传感器的输出值表示的燃料比abyfs，作为“EGR停止状态不平衡判定参数”，获得与差分值d（abyfs）dt对应的值 正在停止EGR气体供应。 确定装置通过从EGR供应状态不平衡确定参数Pon中减去EGR停止状态不平衡确定参数Poff而获得“EGR导致不平衡确定参数Pegr”，并且确定缸间空燃比不平衡状态已经发生 当参数Pegr大于阈值Pegrth时，供应EGR气体。
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10.发明申请公开(公告)号：US20130261934A1
公开(公告)日：2013-10-03
申请号：US13871249
申请日：2013-04-26
IPC分类号： F02D41/00
CPC分类号： F02D41/00 , F02D41/0042 , F02D41/0085 , F02D41/1454 , F02D41/2441 , F02D41/2454
摘要： An apparatus for determining an air-fuel ratio imbalance among cylinders based on an output value of an air-fuel ratio sensor, an imbalance determination parameter which becomes larger or smaller as a difference among air-fuel ratios becomes larger, and performs determining an air-fuel ratio imbalance among cylinders based on a result of a comparison between the imbalance determination parameter and a imbalance determination threshold. The determining apparatus calculates a purge correction coefficient which compensates for a change in the air-fuel ratio due to an evaporated fuel gas which is generated in a fuel tank, while the evaporated fuel gas is being introduced into an intake passage, and corrects a fuel injection amount with the purge correction coefficient FPG.
摘要翻译： 一种用于基于空燃比传感器的输出值来确定气缸之间的空燃比不平衡的装置，作为空燃比之差变大或变小的不平衡确定参数变大，并且执行空气 - 基于不平衡确定参数和不平衡确定阈值之间的比较的结果，气缸之间的燃料比不平衡。 确定装置计算净化校正系数，其补偿由于在燃料箱中产生的蒸发燃料气体而引起的空燃比的变化，同时蒸发的燃料气体被引入进气通道中，并且校正燃料 喷射量与净化校正系数FPG。
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