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公开(公告)号：US09021789B2
公开(公告)日：2015-05-05
申请号：US12449987
申请日：2008-03-06
CPC分类号： F01N11/00 , B01D53/90 , B01D53/9431 , B01D53/9495 , B01D2258/012 , F01N3/0871 , F01N2250/02 , F01N2550/02 , F01N2560/026 , F02D41/0275 , F02D41/146 , F02D2041/1468 , Y02T10/20 , Y02T10/47
摘要： A NOx amount capable of being absorbed by a criteria catalyst as a boundary between degradation and normality is supplied to a NOx storage reduction catalyst and thereafter, a reducer amount corresponding to the NOx amount is supplied by a rich spike operation. Degradation of the NOx catalyst is determined based upon the output of the NOx sensor at this time. Since the degradation of the NOx catalyst is determined only by a magnitude of the NOx sensor output, the degradation diagnosis can be performed with high precision. While the catalyst is normal, the excessive reducers are not supplied and therefore, deterioration of the fuel consumption can be prevented.
摘要翻译： 通过标准催化剂作为降解和正常之间的边界吸收的NOx量被提供给NOx储存还原催化剂，此后通过富峰操作提供与NOx量对应的还原剂量。 此时NOx催化剂的降解是基于NOx传感器的输出而确定的。 由于NOx催化剂的劣化仅由NOx传感器输出的大小决定，所以可以高精度地进行劣化诊断。 当催化剂正常时，不提供过量的还原剂，因此可以防止燃料消耗的劣化。
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公开(公告)号：US20100083637A1
公开(公告)日：2010-04-08
申请号：US12449987
申请日：2008-03-06
CPC分类号： F01N11/00 , B01D53/90 , B01D53/9431 , B01D53/9495 , B01D2258/012 , F01N3/0871 , F01N2250/02 , F01N2550/02 , F01N2560/026 , F02D41/0275 , F02D41/146 , F02D2041/1468 , Y02T10/20 , Y02T10/47
摘要： A NOx amount capable of being absorbed by a criteria catalyst as a boundary between degradation and normality is supplied to a NOx storage reduction catalyst and thereafter, a reducer amount corresponding to the NOx amount is supplied by a rich spike operation. Degradation of the NOx catalyst is determined based upon the output of the NOx sensor at this time. Since the degradation of the NOx catalyst is determined only by a magnitude of the NOx sensor output, the degradation diagnosis can be performed with high precision. While the catalyst is normal, the excessive reducers are not supplied and therefore, deterioration of the fuel consumption can be prevented.
摘要翻译： 通过标准催化剂作为降解和正常之间的边界吸收的NOx量被提供给NOx储存还原催化剂，此后通过富峰操作提供与NOx量对应的还原剂量。 此时NOx催化剂的降解是基于NOx传感器的输出而确定的。 由于NOx催化剂的劣化仅由NOx传感器输出的大小决定，所以可以高精度地进行劣化诊断。 当催化剂正常时，不提供过量的还原剂，因此可以防止燃料消耗的劣化。
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3.发明授权公开(公告)号：US08650943B2
公开(公告)日：2014-02-18
申请号：US13393148
申请日：2009-08-28
申请人： Koichi Kimura , Hiroshi Sawada , Toru Kidokoro , Yasushi Iwazaki
发明人： Koichi Kimura , Hiroshi Sawada , Toru Kidokoro , Yasushi Iwazaki
IPC分类号： G01M15/10
CPC分类号： F02D41/0085 , F02B75/041 , F02B2275/16 , F02D15/04 , F02D41/1441 , F02D41/1456 , Y02T10/123
摘要： An air-fuel ratio imbalance among cylinders determining apparatus according to the present invention is applied to a multi-cylinder internal combustion engine in which a compression ratio is variable. The determining apparatus obtains, using at least an output value of an upstream air-fuel ratio sensor disposed for a catalyst, an “imbalance determining parameter” which becomes larger as a degree of an imbalance among “individual cylinder air-fuel ratios” becomes larger, each of the individual cylinder air-fuel ratios being an air-fuel ratio of a mixture supplied to each of cylinders. Further, the determining apparatus determines that an air-fuel ratio imbalance state among cylinders is occurring, when the imbalance determining parameter is larger than a predetermined threshold. The determining apparatus changes the predetermined threshold in accordance with a mechanical compression ratio of the engine.
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被应用于压缩比可变的多气缸内燃机。 判定装置使用至少设置于催化剂的上游空燃比传感器的输出值，获得“各个气缸空燃比”之间的不平衡度变大的“不平衡判定参数”变大 每个单独的气缸空燃比是供应到每个气缸的混合物的空燃比。 此外，当不平衡确定参数大于预定阈值时，确定装置确定气缸之间的空燃比不平衡状态正在发生。 确定装置根据发动机的机械压缩比来改变预定阈值。
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公开(公告)号：US08534046B2
公开(公告)日：2013-09-17
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： F01N3/00
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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5.发明申请公开(公告)号：US20110288739A1
公开(公告)日：2011-11-24
申请号：US13146354
申请日：2009-02-03
IPC分类号： F02D41/14
CPC分类号： F02D41/0085 , F02D41/0042 , F02D41/1441 , F02D41/1454 , F02D41/2454 , F02M25/08 , F02M35/10216 , F02M35/10386
摘要： An apparatus for determining an air-fuel ratio imbalance among cylinders including an upstream air-fuel ratio sensor, a catalytic converter, and a downstream air-fuel ratio sensor disposed at positions downstream of an exhaust gas aggregated portion, calculates a sub feedback amount to have an output value of the downstream air-fuel ratio sensor coincides with a value corresponding to the stoichiometric air-fuel ratio, and performs an air-fuel ratio feedback control to have an air-fuel ratio of a mixture supplied to an engine based on the sub feedback amount and the output value of the upstream air-fuel ratio sensor.
摘要翻译： 一种用于确定包括上游空燃比传感器，催化转化器和布置在废气聚集部分下游的下游空燃比传感器的气缸之间的空燃比不平衡的装置，计算副反馈量至 具有下游空燃比传感器的输出值与理论空燃比对应的值一致，进行空燃比反馈控制，使得供给发动机的混合气的空燃比基于 副反馈量和上游空燃比传感器的输出值。
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6.发明授权公开(公告)号：US08024105B2
公开(公告)日：2011-09-20
申请号：US12416262
申请日：2009-04-01
IPC分类号： F02D41/22
CPC分类号： F01N11/00 , F01N3/10 , F01N2550/02 , F01N2560/06 , Y02T10/47
摘要： An apparatus and a method for detecting abnormal air-fuel ratio variation among cylinders of a multi-cylinder internal combustion engine are provided. The apparatus includes: a catalyst that is provided in an exhaust passage of the multi-cylinder internal combustion engine; a catalyst temperature detection unit that detects a temperature of the catalyst; a catalyst temperature estimation unit that estimates a temperature of the catalyst based on an engine operating state; and an abnormality detection unit that determines whether abnormal air-fuel ratio variation among the cylinders has occurred based on the detected temperature of the catalyst and the estimated temperature of the catalyst.
摘要翻译： 提供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和方法。 该装置包括：设置在多气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; 催化剂温度估计单元，其基于发动机运转状态来估计催化剂的温度; 以及异常检测单元，其基于检测到的催化剂的温度和催化剂的估计温度来判定是否发生了气缸之间的异常空燃比变动。
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7.发明授权Air-fuel ratio imbalance determining apparatus among cylinders for an internal combustion engine 有权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
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。
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8.发明授权公开(公告)号：US08744729B2
公开(公告)日：2014-06-03
申请号：US12663783
申请日：2008-07-23
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。
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公开(公告)号：US08649956B2
公开(公告)日：2014-02-11
申请号：US13090814
申请日：2011-04-20
申请人： Yusuke Kawamura , Takuya Matsumoto , Takashi Nakamura , Makoto Sato , Toru Kidokoro , Hiroshi Sawada , Yasushi Iwazaki
发明人： Yusuke Kawamura , Takuya Matsumoto , Takashi Nakamura , Makoto Sato , Toru Kidokoro , Hiroshi Sawada , Yasushi Iwazaki
IPC分类号： F02D41/14
CPC分类号： F02D41/1441 , F01N3/101 , F01N11/007 , F01N2560/025 , F02D41/0235 , F02D41/1456 , F02D41/1495 , F02D2041/1431 , F02D2200/0816 , Y02T10/22 , Y02T10/47
摘要： The fact that “with respect to a process in which the output value of a downstream air-fuel ratio sensor (sensor output value) is inverted from the minimum output value to the maximum output value during execution of an active control, the local maximum and minimum values of the secondary differential value of the sensor output value is widely affected by the size of the response delay of the downstream air-fuel ratio sensor and the size of the degree of the degradation of the three-way catalyst” is utilized. By preliminarily acquiring and memorizing, as maps, these relations obtained through an experiment, and applying the “local maximum and minimum values of the secondary differential value of the sensor output value” calculated from the transition of the sensor output value acquired during execution of the active control to the maps, the response delay (time constant) of the downstream air-fuel ratio sensor is acquired.
摘要翻译： “关于在执行主动控制期间下游空燃比传感器的输出值（传感器输出值）从最小输出值反转到最大输出值的过程的局部最大值和 传感器输出值的二次微分值的最小值受下游空燃比传感器的响应延迟的大小和三元催化剂的劣化程度的大小的影响。 通过预先获取并记忆通过实验获得的这些关系，并且应用从在执行期间获取的传感器输出值的转变计算出的“传感器输出值的二次微分值的局部最大值和最小值” 主动控制地图，获取下游空燃比传感器的响应延迟（时间常数）。
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10.发明申请公开(公告)号：US20120035831A1
公开(公告)日：2012-02-09
申请号：US13133044
申请日：2008-12-05
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。
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