-
1.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）。
-
2.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。
-
3.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。
-
4.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。
-
5.发明授权公开(公告)号：US08447497B2
公开(公告)日：2013-05-21
申请号：US13496623
申请日：2009-09-18
IPC分类号： B60T7/12
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。
-
6.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）。
-
7.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。
-
8.发明申请公开(公告)号：US20120173116A1
公开(公告)日：2012-07-05
申请号：US13389082
申请日：2009-08-06
IPC分类号： G01M15/10
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。
-
9.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。
-
10.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。
-
-
-
-
-
-
-
-
-
搜索结果
60 条记录 (耗时 0.034 秒)
