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1. 发明授权

US08401765B2 Inter-cylinder air-fuel ratio imbalance determination apparatus for internal combustion engine 有权
标题翻译：用于内燃机的缸内空燃比不平衡确定装置
公开(公告)号：US08401765B2
公开(公告)日：2013-03-19
申请号：US13516841
申请日：2009-12-18
申请人： Yasushi Iwazaki , Hiroshi Sawada , Hiroshi Miyamoto , Fumihiko Nakamura , Keiichiro Aoki
发明人： Yasushi Iwazaki , Hiroshi Sawada , Hiroshi Miyamoto , Fumihiko Nakamura , Keiichiro Aoki
IPC分类号： F02D41/26 , F02D41/30 , F02B77/08
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。

2. 发明申请

US20120277980A1 INTER-CYLINDER AIR-FUEL RATIO IMBALANCE DETERMINATION APPARATUS FOR INTERNAL COMBUSTION ENGINE 有权
标题翻译：用于内燃机的缸内空燃比不平衡测定装置
公开(公告)号：US20120277980A1
公开(公告)日：2012-11-01
申请号：US13516841
申请日：2009-12-18
申请人： Yasushi Iwazaki , Hiroshi Sawada , Hiroshi Miyamoto , Fumihiko Nakamura , Keiichiro Aoki
发明人： Yasushi Iwazaki , Hiroshi Sawada , Hiroshi Miyamoto , Fumihiko Nakamura , Keiichiro Aoki
IPC分类号： F02D41/26 , F02D41/30
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。

3. 发明授权

US08401766B2 Inter-cylinder air-fuel ratio imbalance determination apparatus for internal combustion engine 有权
标题翻译：用于内燃机的缸内空燃比不平衡确定装置
公开(公告)号：US08401766B2
公开(公告)日：2013-03-19
申请号：US13514764
申请日：2009-12-09
申请人： Yasushi Iwazaki , Hiroshi Sawada , Hiroshi Miyamoto , Fumihiko Nakamura , Keiichiro Aoki
发明人： Yasushi Iwazaki , Hiroshi Sawada , Hiroshi Miyamoto , Fumihiko Nakamura , Keiichiro Aoki
IPC分类号： G06F19/00 , F02D41/14 , G01N27/407
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，可以进行具有高精度的气缸间空燃比不平衡确定。

4. 发明申请

US20120323466A1 INTER-CYLINDER AIR-FUEL RATIO IMBALANCE DETERMINATION APPARATUS FOR INTERNAL COMBUSTION ENGINE 有权
标题翻译：用于内燃机的缸内空燃比不平衡测定装置
公开(公告)号：US20120323466A1
公开(公告)日：2012-12-20
申请号：US13514764
申请日：2009-12-09
申请人： Yasushi Iwazaki , Hiroshi Sawada , Hiroshi Miyamoto , Fumihiko Nakamura , Keiichiro Aoki
发明人： Yasushi Iwazaki , Hiroshi Sawada , Hiroshi Miyamoto , Fumihiko Nakamura , Keiichiro Aoki
IPC分类号： F02D41/26 , F02D41/30
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。

5. 发明申请

US20110271665A1 AIR-FUEL RATIO IMBALANCE AMONG CYLINDERS DETERMINING APPARATUS FOR AN INTERNAL COMBUSTION ENGINE 有权
标题翻译：用于内燃机的气缸测定装置的空燃比不平衡
公开(公告)号：US20110271665A1
公开(公告)日：2011-11-10
申请号：US13144194
申请日：2009-11-26
申请人： Yasushi Iwazaki , Hiroshi Miyamoto , Hiroshi Sawada , Keiichiro Aoki
发明人： Yasushi Iwazaki , Hiroshi Miyamoto , Hiroshi Sawada , Keiichiro Aoki
IPC分类号： F01N3/10 , G01N33/00
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。

6. 发明授权

US09194315B2 Air-fuel ratio imbalance among cylinders determining apparatus for an internal combustion engine 有权
标题翻译：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
申请人： Yasushi Iwazaki , Hiroshi Miyamoto , Hiroshi Sawada , Keiichiro Aoki
发明人： Yasushi Iwazaki , Hiroshi Miyamoto , Hiroshi Sawada , Keiichiro Aoki
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。

7. 发明授权

US08452521B2 Inter-cylinder air-fuel ratio imbalance determination apparatus for an internal combustion engine 有权
标题翻译：用于内燃机的缸内空燃比不平衡确定装置
公开(公告)号：US08452521B2
公开(公告)日：2013-05-28
申请号：US13509372
申请日：2009-11-12
申请人： Yasushi Iwazaki , Hiroshi Miyamoto , Hiroshi Sawada , Keiichiro Aoki
发明人： Yasushi Iwazaki , Hiroshi Miyamoto , Hiroshi Sawada , Keiichiro Aoki
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。

8. 发明申请

US20120232773A1 INTER-CYLINDER AIR-FUEL RATIO IMBALANCE DETERMINATION APPARATUS FOR AN INTERNAL COMBUSTION ENGINE 有权
标题翻译：内燃机的气缸内空气燃料比重测定装置
公开(公告)号：US20120232773A1
公开(公告)日：2012-09-13
申请号：US13509372
申请日：2009-11-12
申请人： Yasushi Iwazaki , Hiroshi Miyamoto , Hiroshi Sawada , Keiichiro Aoki
发明人： Yasushi Iwazaki , Hiroshi Miyamoto , Hiroshi Sawada , Keiichiro Aoki
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。

9. 发明授权

US08965665B2 Air-fuel ratio imbalance determining apparatus among cylinders for an internal combustion engine 有权
标题翻译：用于内燃机的气缸中的空燃比不平衡确定装置
公开(公告)号：US08965665B2
公开(公告)日：2015-02-24
申请号：US13389082
申请日：2009-08-06
申请人： Yasushi Iwazaki , Hiroshi Miyamoto , Fumihiko Nakamura , Hiroshi Sawada , Toru Kidokoro
发明人： Yasushi Iwazaki , Hiroshi Miyamoto , Fumihiko Nakamura , Hiroshi Sawada , Toru Kidokoro
IPC分类号： F02D41/22 , F02D41/00 , F02D41/14
CPC分类号： F02D41/008 , F02D41/1456
摘要： An air-fuel ratio imbalance among cylinders determining apparatus according to the present invention obtains an output Vabyfs of an air-fuel ratio sensor disposed at a portion downstream of an exhaust gas aggregated portion of an exhaust gas passage, and obtains a second-order differential value d2AF (a change rate of a change rate of a detected air-fuel ratio abyfs) of a detected air-fuel ratio abyfs represented by the air-fuel ratio sensor output Vabyfs. The imbalance determining apparatus determines that an air-fuel ratio imbalance state among cylinders is occurring when a detected air-fuel ratio second-order differential corresponding value (for example, a second-order differential value d2AF per se) obtained in accordance with the second-order differential value d2AF is larger than a first threshold value.
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获得设置在排气通道的排气集中部分下游的空燃比传感器的输出Vabyfs，并获得二阶微分由空燃比传感器输出Vabyfs表示的检测空燃比abyfs的值d2AF（检测空燃比abyfs的变化率的变化率）。不平衡确定装置确定当根据第二个所获得的检测到的空燃比二阶差分对应值（例如，二阶差分值d2AF本身）发生气缸之间的空燃比不平衡状态时 - 阶微分值d2AF大于第一阈值。

10. 发明申请

US20120173115A1 AIR-FUEL RATIO IMBALANCE AMONG CYLINDERS DETERMINING APPARATUS FOR AN INTERNAL COMBUSTION ENGINE 有权
标题翻译：用于内燃机的气缸测定装置的空燃比不平衡
公开(公告)号：US20120173115A1
公开(公告)日：2012-07-05
申请号：US13382079
申请日：2009-07-02
申请人： Hiroshi Sawada , Fumihiko Nakamura , Hiroshi Miyamoto , Yasushi Iwazaki
发明人： Hiroshi Sawada , Fumihiko Nakamura , Hiroshi Miyamoto , Yasushi Iwazaki
IPC分类号： G01M15/10
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检测到的新检测到的当前检测到的空燃比abyfs与检测到采样时间ts前的空燃比abyfsold之间的检测空燃比变化率（Dgr; AF），检测到的空气燃料的平均值比例变化率和Dgr AF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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