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11. 发明申请

US20090037079A1 Air-fuel ratio control apparatus and method for an internal combustion engine 失效
公开(公告)号：US20090037079A1
公开(公告)日：2009-02-05
申请号：US12213064
申请日：2008-06-13
申请人： Yusuke Suzuki , Yasushi Iwazaki , Toru Kidokoro , Hiroshi Sawada , Fumihiko Nakamura , Keiichiro Aoki
发明人： Yusuke Suzuki , Yasushi Iwazaki , Toru Kidokoro , Hiroshi Sawada , Fumihiko Nakamura , Keiichiro Aoki
IPC分类号： F02D41/00
CPC分类号： F02D41/1495 , F02D41/008 , F02D41/1441 , F02D41/1454 , F02D41/1498 , F02D2041/147
摘要： When an internal combustion engine including a plurality of cylinders is operating steadily, an index value relating to an actual hydrogen content in exhaust gas downstream of a portion where exhaust passages from the cylinders merge, and upstream of a catalyst is detected. When an index value relating to the actual hydrogen content in the exhaust gas is larger than a determination index value relating to a hydrogen content corresponding to a permissible limit of air-fuel ratio variation, it is determined that there is abnormal air-fuel ratio variation between the cylinders.

12. 发明申请

US20120185156A1 APPARATUS FOR DETERMINING AN AIR-FUEL RATIO IMBALANCE AMONG CYLINDERS OF AN INTERNAL COMBUSTION ENGINE 有权
标题翻译：用于确定内燃机缸内空燃比不平衡的装置
公开(公告)号：US20120185156A1
公开(公告)日：2012-07-19
申请号：US13496623
申请日：2009-09-18
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： F02D41/30 , F02D41/26 , F02D28/00
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。

13. 发明申请

US20100168986A1 APPARATUS AND METHOD FOR DETECTING ABNORMAL AIR-FUEL RATIO VARIATION AMONG CYLINDERS OF MULTI-CYLINDER INTERNAL COMBUSTION ENGINE 有权
标题翻译：用于检测多缸内燃机缸体异常空气 - 燃料比变化的装置和方法
公开(公告)号：US20100168986A1
公开(公告)日：2010-07-01
申请号：US12663783
申请日：2008-07-23
申请人： Yasushi Iwazaki , Toru Kidokoro , Hiroshi Sawada , Fumihiko Nakamura
发明人： Yasushi Iwazaki , Toru Kidokoro , Hiroshi Sawada , Fumihiko Nakamura
IPC分类号： F02D41/00 , F01N3/10 , G01M15/10
CPC分类号： F02D41/1495 , F02D41/0085 , F02D41/1441 , F02D2041/147
摘要： An apparatus for detecting abnormal air-fuel ratio variation among cylinders of a multi-cylinder internal combustion engine includes: a catalyst element that oxidizes hydrogen contained in exhaust gas to remove the hydrogen; a first air-fuel ratio sensor that detects an air-fuel ratio of exhaust gas that has not passed through the catalyst element; a second air-fuel ratio sensor that detects an air-fuel ratio of exhaust gas that has passed through the catalyst element; and a unit that determines whether abnormal air-fuel ratio variation among the cylinders has occurred based on an amount by which a value detected by the second air-fuel ratio sensor is leaner than a value detected by the first air-fuel ratio sensor
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：氧化废气中所含的氢以除去氢的催化剂元件; 第一空燃比传感器，其检测未通过所述催化剂元件的废气的空燃比; 第二空燃比传感器，其检测已经通过所述催化剂元件的废气的空燃比; 以及基于由所述第二空燃比传感器检测出的值比由所述第一空燃比传感器检测出的值更少的量，判定所述气缸之间的异常空燃比变动是否发生的单元

14. 发明授权

US07597091B2 Air-fuel ratio control apparatus and method for an internal combustion engine 失效
标题翻译：用于内燃机的空燃比控制装置和方法
公开(公告)号：US07597091B2
公开(公告)日：2009-10-06
申请号：US12213064
申请日：2008-06-13
申请人： Yusuke Suzuki , Yasushi Iwazaki , Toru Kidokoro , Hiroshi Sawada , Fumihiko Nakamura , Keiichiro Aoki
发明人： Yusuke Suzuki , Yasushi Iwazaki , Toru Kidokoro , Hiroshi Sawada , Fumihiko Nakamura , Keiichiro Aoki
IPC分类号： F02D41/14
CPC分类号： F02D41/1495 , F02D41/008 , F02D41/1441 , F02D41/1454 , F02D41/1498 , F02D2041/147
摘要： When an internal combustion engine including a plurality of cylinders is operating steadily, an index value relating to an actual hydrogen content in exhaust gas downstream of a portion where exhaust passages from the cylinders merge, and upstream of a catalyst is detected. When an index value relating to the actual hydrogen content in the exhaust gas is larger than a determination index value relating to a hydrogen content corresponding to a permissible limit of air-fuel ratio variation, it is determined that there is abnormal air-fuel ratio variation between the cylinders.
摘要翻译：当包括多个气缸的内燃机工作稳定时，检测与在气缸的排气通道合流的部分下游以及催化剂上游相关的排气中的实际氢含量的指标值。当与废气中的实际氢含量相关的指标值大于与空燃比变化的允许极限相对应的氢含量的判定指标值时，判断为存在异常空燃比变动在气缸之间。

15. 发明申请

US20090211350A1 APPARATUS AND METHOD FOR DETECTING ABNORMALITY OF INTER-CYLINDER AIR-FUEL RATIO DISPERSION IN MULTI-CYLINDER INTERNAL COMBUSTION ENGINE 有权
标题翻译：用于检测多缸内燃机内部气缸空燃比分散异常的装置和方法
公开(公告)号：US20090211350A1
公开(公告)日：2009-08-27
申请号：US12393597
申请日：2009-02-26
申请人： Yasushi IWAZAKI , Toru Kidokoro , Hiroshi Sawada , Keiji Imamura , Fumihiko Nakamura
发明人： Yasushi IWAZAKI , Toru Kidokoro , Hiroshi Sawada , Keiji Imamura , Fumihiko Nakamura
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。

16. 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。

17. 发明授权

US08744729B2 Apparatus and method for detecting abnormal air-fuel ratio variation among cylinders of multi-cylinder internal combustion engine 有权
标题翻译：用于检测多缸内燃机气缸异常空燃比变动的装置和方法
公开(公告)号：US08744729B2
公开(公告)日：2014-06-03
申请号：US12663783
申请日：2008-07-23
申请人： Yasushi Iwazaki , Toru Kidokoro , Hiroshi Sawada , Fumihiko Nakamura
发明人： Yasushi Iwazaki , Toru Kidokoro , Hiroshi Sawada , Fumihiko Nakamura
IPC分类号： B60T7/12 , G05D1/00 , G06F7/00 , G06F17/00
CPC分类号： F02D41/1495 , F02D41/0085 , F02D41/1441 , F02D2041/147
摘要： An apparatus for detecting abnormal air-fuel ratio variation among cylinders of a multi-cylinder internal combustion engine includes: a catalyst element that oxidizes hydrogen contained in exhaust gas to remove the hydrogen; a first air-fuel ratio sensor that detects an air-fuel ratio of exhaust gas that has not passed through the catalyst element; a second air-fuel ratio sensor that detects an air-fuel ratio of exhaust gas that has passed through the catalyst element; and a unit that determines whether abnormal air-fuel ratio variation among the cylinders has occurred based on an amount by which a value detected by the second air-fuel ratio sensor is leaner than a value detected by the first air-fuel ratio sensor.
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：氧化废气中所含的氢以除去氢的催化剂元件; 第一空燃比传感器，其检测未通过所述催化剂元件的废气的空燃比; 第二空燃比传感器，其检测已经通过所述催化剂元件的废气的空燃比; 以及基于由所述第二空燃比传感器检测的值比由所述第一空燃比传感器检测的值更稀的量，确定是否发生了所述气缸之间的异常空燃比变动的单元。

18. 发明申请

US20120035831A1 AIR-FUEL RATIO IMBALANCE AMONG CYLINDERS DETERMINING APPARATUS FOR A MULTI-CYLINDER INTERNAL COMBUSTION ENGINE 有权
标题翻译：确定多缸内燃机发动机的气缸的空燃比不平衡
公开(公告)号：US20120035831A1
公开(公告)日：2012-02-09
申请号：US13133044
申请日：2008-12-05
申请人： Toru Kidokoro , Hiroshi Sawada , Yasushi Iwazaki , Fumihiko Nakamura
发明人： Toru Kidokoro , Hiroshi Sawada , Yasushi Iwazaki , Fumihiko Nakamura
IPC分类号： F02D41/30 , F02D28/00 , F02D41/26
CPC分类号： F02D41/1441 , F02D41/0085 , F02D2041/1418
摘要： A judging device comprises a catalyst, an upstream air/fuel ratio sensor having an air/fuel ratio sensing element covered with a diffusion resistance layer, and a downstream air/fuel ratio sensor. The judging device performs main feedback control to equalize the air/fuel ratio indicated by the output value of the upstream air/fuel ratio sensor to an upstream target air/fuel ratio and sub-feedback control to equalize the output value of the downstream air/fuel ratio sensor to a downstream target value. The judging device acquires “an imbalance judging parameter” which increases with “the increase of the difference between the amount of hydrogen contained in the exhaust gas before the exhaust gas passes through the catalyst and that after the exhaust gas passes through the catalyst” according to the sub-feedback amount. When the imbalance judging parameter is larger than an abnormality judgment threshold, the judging device judges that an air/fuel ratio imbalance among the cylinders has occurred. The judging device does not make judgment on air/fuel ratio imbalance among the cylinders if a predetermined judgment prohibition condition is satisfied, for example, if the flow of the exhaust gas is a predetermined value or more.
摘要翻译：判断装置包括催化剂，具有覆盖有扩散电阻层的空气/燃料比感测元件的上游空燃比传感器和下游空气/燃料比传感器。判断装置执行主反馈控制，以将由上游空燃比传感器的输出值表示的空燃比与上游目标空燃比和副反馈控制进行平衡，以使下游空气/燃料比传感器的输出值相等，燃料比传感器到下游目标值。判断装置获取“不平衡判定参数”，其随着“排气通过催化剂之前的排气中所含的氢的量与废气通过催化剂之后的氢气的差异的增加”增加，根据子反馈量。当不平衡判定参数大于异常判断阈值时，判断装置判断出气缸之间的空气/燃料比不平衡发生。如果满足预定的判定禁止条件，例如如果排气的流量为预定值以上，则判断装置不判断气缸之间的空气/燃料比不平衡。

19. 发明授权

US08510017B2 Cylinder-to-cylinder air/fuel ratio imbalance determination system of internal combustion engine 有权
标题翻译：内燃机气缸空气/燃料比不平衡测定系统
公开(公告)号：US08510017B2
公开(公告)日：2013-08-13
申请号：US12847300
申请日：2010-07-30
申请人： Hiroshi Sawada , Yasushi Iwazaki , Hiroshi Miyamoto , Fumihiko Nakamura
发明人： Hiroshi Sawada , Yasushi Iwazaki , Hiroshi Miyamoto , Fumihiko Nakamura
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）。

20. 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。

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