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）。

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。

公开(公告)号：US20130261934A1

公开(公告)日：2013-10-03

申请号：US13871249

申请日：2013-04-26

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： F02D41/00

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。

公开(公告)号：US08509984B2

公开(公告)日：2013-08-13

申请号：US13146323

申请日：2009-01-28

申请人： Toru Kidokoro ,  Hiroshi Sawada ,  Yasushi Iwazaki ,  Fumihiko Nakamura ,  Shuntaro Okazaki ,  Masanori Ishida

发明人： Toru Kidokoro ,  Hiroshi Sawada ,  Yasushi Iwazaki ,  Fumihiko Nakamura ,  Shuntaro Okazaki ,  Masanori Ishida

IPC分类号： F02D45/00

CPC分类号： F02D41/0085 ,  F02D41/1441 ,  F02D41/1495 ,  F02D41/2454

摘要： A monitoring apparatus including a catalytic converter, an upstream air-fuel ratio sensor, and a downstream air-fuel ratio sensor; calculates a sub feedback amount to have an air-fuel ratio represented based on an output value of the downstream air-fuel ratio sensor coincide with a stoichiometric air-fuel ratio; and controls an fuel injection amount based on an output value of the upstream air-fuel ratio sensor and the sub feedback amount, in such a manner that an air-fuel ratio of a mixture supplied to an engine coincides with the stoichiometric air-fuel ratio.

摘要翻译： 一种监测装置，包括催化转化器，上游空燃比传感器和下游空燃比传感器; 计算出具有基于下游空燃比传感器的输出值表示的空燃比与副理论空燃比一致的副反馈量; 并且以提供给发动机的混合物的空燃比与理论空燃比一致的方式控制基于上游空燃比传感器的输出值和副反馈量的燃料喷射量 。

公开(公告)号：US20120173116A1

公开(公告)日：2012-07-05

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： 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。

公开(公告)号：US20120116651A1

公开(公告)日：2012-05-10

申请号：US13257842

申请日：2009-09-08

申请人： Hiroshi Miyamoto ,  Hiroshi Sawada ,  Yasushi Iwazaki ,  Tatsuya Tsuji ,  Toru Kidokoro

发明人： Hiroshi Miyamoto ,  Hiroshi Sawada ,  Yasushi Iwazaki ,  Tatsuya Tsuji ,  Toru Kidokoro

IPC分类号： F02D41/30

CPC分类号： F02D41/30 ,  F02D41/1495 ,  F02D41/221 ,  F02D2041/228 ,  Y02T10/40

摘要： When the intake air amount is smaller than the specific intake air amount, the unit air-fuel ratio change amount calculated during the engine operation is corrected such that the unit air-fuel ratio change amount increases in the condition that the base unit air-fuel ratio change amount is an upper limit and when the intake air amount is greater than the specific intake air amount, the unit air-fuel ratio change amount calculated during the engine operation is corrected such that the unit air-fuel ratio change amount decreases in the condition that the base unit air-fuel ratio change amount is a lower limit. When the corrected unit air-fuel ratio change amount is greater than the judgment value, it is judged that the inter-cylinder air-fuel ratio imbalance condition occurs.

摘要翻译： 当进气量小于特定进气量时，在发动机运转中计算出的单位空燃比变化量被校正为使得单位空燃比变化量在基本单位空气燃料 比例变化量为上限，当进气量大于特定进气量时，在发动机运转中计算出的单位空燃比变化量被校正，使得单位空燃比变化量在 条件是基本单位空燃比变化量是下限。 当校正单位空燃比变化量大于判定值时，判断为缸内空燃比不平衡状态发生。

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.

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。

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

公开(公告)号：US20100083637A1

公开(公告)日：2010-04-08

申请号：US12449987

申请日：2008-03-06

申请人： Hiroshi Sawada ,  Yasushi Iwazaki ,  Toru Kidokoro ,  Shinichiro Imamura

发明人： Hiroshi Sawada ,  Yasushi Iwazaki ,  Toru Kidokoro ,  Shinichiro Imamura

IPC分类号： F01N11/00 ,  F01N9/00 ,  F01N3/10

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。