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31.发明授权Air-fuel ratio imbalance among cylinders determining apparatus for an internal combustion engine 有权用于内燃机的气缸确定装置之间的空燃比不平衡公开(公告)号：US09194315B2
公开(公告)日：2015-11-24
申请号：US13144194
申请日：2009-11-26
IPC分类号： F01N3/10 , G01N7/00 , F02D41/00 , G01N27/419 , F02D41/14
CPC分类号： F02D41/0085 , F02D41/1441 , F02D41/1454 , F02D41/1475 , G01N27/419
摘要： An air-fuel ratio imbalance among cylinders determining apparatus (a determining apparatus) according to an aspect of the present invention, obtains a parameter X for imbalance determination which becomes larger as a variation of an air-fuel ratio of an exhaust gas passing through a position at which the air-fuel ratio sensor is disposed becomes larger, based on an output value Vabyfs of an air-fuel ratio sensor 67. At the same time, the determining apparatus changes a target air-fuel ratio which is a target value of an air-fuel ratio of a mixture supplied to an engine to “an air-fuel ratio (a target rich air-fuel ratio AFrich or a target lean air-fuel ratio AFlean) other than a stoichiometric air-fuel ratio” from the stoichiometric air-fuel ratio. Accordingly, the determining apparatus can obtain the parameter X for imbalance determination in a state in which a responsivity of the air-fuel ratio sensor 67 is not low. As a result, it can make a determination on the air-fuel ratio imbalance among cylinders with high accuracy.
摘要翻译： 根据本发明的一个方面的气缸确定装置（确定装置）之间的空燃比不平衡获得作为不平衡确定的参数X随着通过的排气的空燃比的变化而变大 基于空燃比传感器67的输出值Vabyfs，设置空燃比传感器的位置变大。同时，确定装置将作为目标值的目标空燃比 向发动机供给的混合物的空燃比为“理论空燃比以外的理论空燃比以外的空燃比（目标浓空燃比AFrich或目标稀空燃比AFlean）” 空燃比。 因此，在空燃比传感器67的响应度不低的状态下，确定装置可以获得用于不平衡确定的参数X. 因此，可以高精度地确定气缸之间的空燃比不平衡。
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32.发明授权公开(公告)号：US08452521B2
公开(公告)日：2013-05-28
申请号：US13509372
申请日：2009-11-12
IPC分类号： B60T7/12
CPC分类号： F02D41/0085 , F02D41/1441 , F02D41/1455
摘要： An inter-cylinder air-fuel imbalance determination apparatus according to the present invention obtains, based on the output value of the air-fuel ratio sensor, an air-fuel ratio fluctuation indicating amount whose absolute value becomes larger as a fluctuation of the air-fuel ratio of the exhaust gas passing through the air-fuel ratio sensor becomes larger, and further obtains an imbalance determination parameter which becomes larger as an absolute value of the air-fuel ratio fluctuation indicating amount becomes larger. In addition, the determination apparatus obtains an average value of the air-fuel ratio of the exhaust gas when the imbalance determination parameter is being obtained, and obtains an imbalance determination threshold which becomes smaller as the average value of the air-fuel ratio is closer to the stoichiometric air-fuel ratio. The determination apparatus determines that an inter-cylinder air-fuel ratio imbalance state has been occurring when the imbalance determination parameter is larger than the imbalance determination threshold.
摘要翻译： 根据本发明的气缸内空气燃料不平衡确定装置，基于空燃比传感器的输出值，获得空气 - 燃料比传感器的绝对值变大的空燃比变动指示量， 通过空燃比传感器的废气的燃料比变大，进一步得到随着空燃比变动指示量的绝对值变大而变大的不平衡判定参数。 此外，确定装置获得当获得不平衡确定参数时排气的空燃比的平均值，并且获得当空燃比的平均值接近时变小的不平衡确定阈值 达到化学计量空燃比。 当不平衡确定参数大于不平衡确定阈值时，确定装置确定已经发生了缸间空燃比不平衡状态。
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33.发明申请公开(公告)号：US20120323466A1
公开(公告)日：2012-12-20
申请号：US13514764
申请日：2009-12-09
CPC分类号： F02D41/0085 , F02D41/1454 , F02D41/1494 , F02D2250/14
摘要： An inter-cylinder air-fuel ratio imbalance determination apparatus (determination apparatus) according to the present invention obtains, based on the output value of the air-fuel ratio sensor, an imbalance determination parameter 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 energizes the heater of the air-fuel ratio sensor in such a manner that a temperature of the air-fuel ratio element during the parameter obtaining period is higher than a temperature of the air-fuel ratio element during a period other than the parameter obtaining period. Accordingly, the imbalance determination parameter is obtained while the responsiveness of the air-fuel ratio sensor is high, and thus, the inter-cylinder air-fuel-ratio imbalance determination having a high accuracy can be made.
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），基于空燃比传感器的输出值，获得作为空燃比变动的空气比变动变大的不平衡判定参数 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。 确定装置使空燃比传感器的加热器通电，使得参数获取期间的空燃比元件的温度比空燃比元件的温度高于空燃比元件的温度 参数获取期。 因此，在空燃比传感器的响应性高的同时获得不平衡确定参数，因此能够进行高精度的气缸间空燃比不平衡判定。
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34.发明申请公开(公告)号：US20120215427A1
公开(公告)日：2012-08-23
申请号：US13505849
申请日：2009-11-05
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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35.发明申请公开(公告)号：US20120185156A1
公开(公告)日：2012-07-19
申请号：US13496623
申请日：2009-09-18
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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36.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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公开(公告)号：US20100307135A1
公开(公告)日：2010-12-09
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： F01N11/00
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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公开(公告)号：US09726103B2
公开(公告)日：2017-08-08
申请号：US13701922
申请日：2010-06-07
申请人： Yasushi Iwazaki , Hiroshi Miyamoto , Tatsuro Shimada , Isao Nakajima , Yoshihisa Oda , Takuya Matsumoto , Masashi Hakariya
发明人： Yasushi Iwazaki , Hiroshi Miyamoto , Tatsuro Shimada , Isao Nakajima , Yoshihisa Oda , Takuya Matsumoto , Masashi Hakariya
CPC分类号： F02D41/30 , F02D41/0085 , F02D41/0235 , F02D41/0245 , F02D41/0255 , F02D41/064 , F02D41/10 , F02D41/1441 , F02D41/1454 , F02D41/1475 , F02D41/182 , F02D41/2496 , F02D2200/02 , F02D2200/021 , F02D2200/04 , F02D2200/0802
摘要： A fuel injection amount control apparatus comprises an air-fuel ratio sensor disposed between an exhaust gas merging portion and an upstream catalyst. The control apparatus performs a feedback correction on an amount of fuel to be injected by the fuel injection valve so that an air-fuel ratio represented by the output value of the upstream air-fuel ratio sensor becomes equal to a target air-fuel ratio set at stoichiometric air-fuel ratio. The control apparatus obtains an air-fuel ratio imbalance indicating value, which becomes larger as a difference in air-fuel ratio of each of the mixtures supplied to each of the combustion chambers among the cylinders becomes larger, and performs an increasing correction to the instructed fuel injection amount in such a manner that an air-fuel ratio determined by the instructed fuel injection amount becomes richer than the stoichiometric air-fuel ratio as the obtained air-fuel ratio imbalance indicating value increases.
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39.发明授权公开(公告)号：US08583348B2
公开(公告)日：2013-11-12
申请号：US13194929
申请日：2011-07-30
申请人： Yasushi Iwazaki , Hiroshi Miyamoto
发明人： Yasushi Iwazaki , Hiroshi Miyamoto
IPC分类号： F02D45/00
CPC分类号： F02D41/1456 , F02D41/0085 , F02D41/10 , F02D41/1401 , F02D41/1441 , F02D41/182 , F02D41/2454 , F02D2041/1432
摘要： A fuel injection amount control system acquires an air-fuel ratio imbalance index value that increases as the degree of ununiformity in the air-fuel ratio among cylinders increases, based on an output value of an upstream air-fuel ratio sensor, and acquires an imbalance index learned value by performing a first-order lag filtering operation for removing noise, on the air-fuel ratio imbalance index value. Also, the fuel injection amount is increased based on the imbalance index learned value. In the filtering operation, the time constant of the filter is set to a smaller value when a magnitude of a difference between the current value and the last value of the air-fuel ratio imbalance index value is equal to or larger than a threshold value.
摘要翻译： 燃料喷射量控制系统基于上游空燃比传感器的输出值获取随着气缸中的空燃比的不均匀度的增加程度而增加的空燃比不平衡指数值，并且获取不平衡 通过对空燃比不平衡指数值执行去除噪声的一阶滞后滤波操作来获得索引学习值。 另外，基于不平衡指数学习值，燃料喷射量增加。 在过滤操作中，当空气 - 燃料比不平衡指数值的当前值和最后值之间的差的大小等于或大于阈值时，滤波器的时间常数被设定为较小的值。
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40.发明授权Air-fuel ratio imbalance among cylinders determining apparatus for an internal combustion engine 有权用于内燃机的气缸确定装置之间的空燃比不平衡公开(公告)号：US08452517B2
公开(公告)日：2013-05-28
申请号：US13382079
申请日：2009-07-02
CPC分类号： F02D41/0085 , F02D41/1454 , F02D2400/18
摘要： An air-fuel ratio imbalance among cylinders determining apparatus according to the present invention comprises an air-fuel ratio sensor having a protective cover and an air-fuel ratio detection element accommodated in the protective cover, and imbalance determining means. The imbalance determining means obtains a detected air-fuel ratio abyfs based on an output Vabyfs of the air-fuel ratio sensor every elapse of a constant sampling time ts, and obtains, as an indicating amount of air-fuel ratio change rate, a difference (detected air-fuel ratio change rate ΔAF) between a present detected air-fuel ratio abyfs which is newly detected and a previous air-fuel ratio abyfsold which was detected the sampling time ts ago, an average of the detected air-fuel ratio change rate ΔAF, and the like. The imbalance determining means determines that the air-fuel ratio imbalance among cylinders state is occurring, when a magnitude of the indicating amount of air-fuel ratio change rate is larger than an imbalance determination threshold.
摘要翻译： 根据本发明的气缸确定装置之间的空燃比不平衡包括具有保护盖和容纳在保护盖中的空燃比检测元件的空燃比传感器和不平衡确定装置。 不平衡确定装置根据空燃比传感器每经过一定采样时间ts的输出Vabyfs获得检测的空燃比abyfs，并且获得作为空燃比变化率的指示量的差 在检测到的新检测到的当前检测空燃比abyfs与检测出采样时间ts前的空燃比abyfsold之间的检测空燃比变化率ΔAF（检测空燃比变化率ΔAF），检测到的空燃比变化的平均值 速率DeltaAF等。 当空燃比变化率的指示量大于不平衡判定阈值时，不平衡确定装置确定气缸状态之间的空燃比不平衡发生。
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