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41.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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42.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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43.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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44.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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公开(公告)号：US08214176B2
公开(公告)日：2012-07-03
申请号：US12226774
申请日：2007-06-26
申请人： Yasushi Iwazaki , Hiroshi Sawada , Takahiro Joko , Masaya Kawaji
发明人： Yasushi Iwazaki , Hiroshi Sawada , Takahiro Joko , Masaya Kawaji
IPC分类号： G06F19/00
CPC分类号： G01N27/4175 , F02D41/1454 , F02D41/222
摘要： An exhaust gas sensor abnormality diagnostic device includes an exhaust gas sensor, and a judgment means that judges whether execution conditions are established for making an abnormality diagnosis of element breakage in the exhaust gas sensor. The device also includes an abnormality diagnosis means that makes the abnormality diagnosis in accordance with an output signal generated by the exhaust gas sensor. Further, when the integrated value of intake air amounts of an internal combustion engine is not smaller than a predetermined value, the judgment means judges that the execution conditions are established. The abnormality diagnosis means cancels the establishment of the execution conditions when an intake air amount of the internal combustion engine remains less than a predetermined value for a predetermined period of time.
摘要翻译： 废气传感器异常诊断装置包括排气传感器，以及判断装置，其判断在废气传感器中进行元件破损的异常诊断的执行条件。 该装置还包括根据由排气传感器产生的输出信号进行异常诊断的异常诊断装置。 此外，当内燃机的进气量的积分值不小于预定值时，判断装置判定执行条件成立。 当内燃机的进气量保持小于预定值一段预定时间时，异常诊断装置取消执行条件的建立。
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46.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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47.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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48.发明申请公开(公告)号：US20120232773A1
公开(公告)日：2012-09-13
申请号：US13509372
申请日：2009-11-12
IPC分类号： F02D41/26
CPC分类号： F02D41/0085 , F02D41/1441 , F02D41/1455
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 67, 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 a position at which the air-fuel ratio sensor is disposed 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 during a period in which 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燃比不平衡判定装置（判定装置），基于空燃比传感器67的输出值，求出绝对值变大的空燃比变动指示量 通过设置空燃比传感器的位置的废气的空燃比的波动变大，进而获得作为空燃比变动的绝对值变大的不平衡判定参数 指示量变大。 此外，确定装置获得在获得不平衡确定参数的时段期间的排气的空燃比的平均值，并且获得作为空气 - 燃料的平均值变小的不平衡确定阈值， 燃料比接近化学计量空燃比。 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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49.发明申请APPARATUS AND METHOD FOR DETECTING VARIATION ABNORMALITY IN AIR-FUEL RATIO BETWEEN CYLINDERS 审中-公开用于检测气瓶之间的空气燃料比变化异常的装置和方法公开(公告)号：US20120174900A1
公开(公告)日：2012-07-12
申请号：US13375048
申请日：2010-12-24
CPC分类号： F02D41/1495 , F02D41/0085 , F02D41/1441 , F02D41/1456
摘要： According to a first aspect of the present invention, there is provided an apparatus for detecting variation abnormality in an air-fuel ratio between cylinders comprising a wide-range air-fuel ratio sensor and an O2 sensor provided in an exhaust passage upstream of an exhaust gas purifying apparatus arranged in the exhaust passage for an internal combustion engine having a plurality of cylinders, air-fuel ratio controlling unit for performing air-fuel ratio control for a predetermined period in such a manner as to make an exhaust air-fuel ratio be equal to a stoichiometric air-fuel ratio based upon output from the wide-range air-fuel ratio sensor, and abnormality detecting unit for detecting variation abnormality in an air-fuel ratio between cylinders based upon output from the O2 sensor for the predetermined period when the air-fuel ratio control is performed.
摘要翻译： 根据本发明的第一方面，提供了一种用于检测气缸之间的空燃比的变化异常的装置，包括宽范围空燃比传感器和设置在排气通道上游的排气通道中的O2传感器 气体净化装置，配置在具有多个气缸的内燃机用排气通路内，空燃比控制单元，以使排气空燃比为规定的期间进行空燃比控制 等于基于大范围空燃比传感器的输出的化学计量空燃比;以及异常检测单元，用于基于来自所述O2传感器的输出在所述预定时段内检测气缸之间的空燃比的变化异常 进行空燃比控制。
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50.发明申请公开(公告)号：US20110054761A1
公开(公告)日：2011-03-03
申请号：US12847300
申请日：2010-07-30
IPC分类号： F02D41/30
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 在这种情况下，空气/燃料比传感器评估参数（例如，检测到的空气/燃料比的变化率和Dgr; AF）。 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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