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公开(公告)号：US09903297B2
公开(公告)日：2018-02-27
申请号：US15110597
申请日：2015-01-08
发明人： Shuntaro Okazaki , Norihisa Nakagawa , Yuji Yamaguchi , Kenji Suzuki , Hiroshi Miyamoto , Yasushi Iwazaki
IPC分类号： F02D41/00 , F02D41/24 , F02D41/14 , F01N3/08 , F01N11/00 , F01N3/20 , F01N9/00 , F02D41/02 , F02D41/26 , F01N13/00
CPC分类号： F02D41/2454 , F01N3/0864 , F01N3/20 , F01N9/00 , F01N11/007 , F01N13/008 , F01N2570/16 , F01N2900/1624 , F02D41/0295 , F02D41/1441 , F02D41/1454 , F02D41/1474 , F02D41/2441 , F02D41/2477 , F02D41/26 , F02D2200/0814 , Y02T10/20 , Y02T10/47
摘要： The internal combustion engine comprises an exhaust purification catalyst able to store oxygen, and a downstream side air-fuel ratio sensor arranged at a downstream side of the exhaust purification catalyst in a direction of exhaust flow. The control system performs feedback control of an amount of fuel fed to a combustion chamber of the internal combustion engine so that an air-fuel ratio of exhaust gas flowing into the exhaust purification catalyst becomes a target air-fuel ratio and performs learning control to correct a parameter relating to the feedback control based on an air-fuel ratio of exhaust gas detected by the downstream side air-fuel ratio sensor. The target air-fuel ratio is alternately switched between a rich set air-fuel ratio and a lean set air-fuel ratio leaner. When a condition for learning acceleration, which is satisfied when it is necessary to accelerate correction of the parameter by the learning control, is satisfied, a rich degree of the rich set air-fuel ratio is increased. Therefore, there is provided an internal combustion engine able to suitably change the speed of updating the learning value.
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2.发明申请公开(公告)号：US20150192083A1
公开(公告)日：2015-07-09
申请号：US14556808
申请日：2014-12-01
发明人： Kenji Suzuki , Yasushi Iwazaki , Hiroshi Miyamoto
CPC分类号： F02D41/1454 , F02D41/0085 , F02D41/1441 , F02D41/1456 , F02D41/1495 , G01M15/104
摘要： An apparatus according to the present invention includes a control apparatus to detect an inter-cylinder air-fuel ratio variation abnormality based on an output fluctuation parameter correlated with a degree of variation in output from an air-fuel ratio sensor. The control apparatus is configured to calculate a positive slope value and a negative slope value when the output from the air-fuel ratio sensor changes to lean side and to a rich side; calculate a determination index value by dividing a difference or a ratio between the positive slope value and the negative slope value by an amplitude index value correlated with a magnitude of a maximum amplitude of the output waveform from the air-fuel ratio sensor; and determine whether a deviation of the air-fuel ratio in one cylinder is a lean-side deviation or a rich-side deviation, based on the determination index value.
摘要翻译： 根据本发明的装置包括：控制装置，用于根据与空燃比传感器的输出的变化程度相关的输出波动参数来检测气缸间空燃比变化异常。 所述控制装置被配置为当所述空燃比传感器的输出变为倾斜侧和富侧时，计算正斜率值和负斜率值; 通过将正斜率值和负斜率值之间的差或比率除以与来自空燃比传感器的输出波形的最大幅度的大小相关的振幅指数值来计算确定指标值; 并且基于所述确定指标值来确定一个气缸中的空燃比的偏差是稀薄侧偏差还是富侧偏差。
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公开(公告)号：US20150089927A1
公开(公告)日：2015-04-02
申请号：US14504516
申请日：2014-10-02
CPC分类号： F02D41/1441 , F01N3/0864 , F01N3/101 , F01N11/007 , F01N2550/03 , F01N2560/025 , F01N2560/14 , F01N2900/1624 , F02D41/1454 , F02D41/1475 , F02D41/1495 , F02D41/22 , Y02T10/22 , Y02T10/47
摘要： An internal combustion engine comprises an exhaust purification catalyst which can store oxygen, controller for controlling the air-fuel ratio of exhaust gas to become a target air-fuel ratio, and a downstream side air-fuel ratio sensor. An abnormality diagnosis system performs an active air-fuel ratio control which alternately controls the target air-fuel ratio to rich and lean air-fuel ratios, and diagnoses abnormality of said exhaust purification catalyst based on the output air-fuel ratio of the air-fuel ratio sensor. The abnormality diagnosis system judges that the exhaust purification catalyst is abnormal when the output air-fuel ratio of the air-fuel ratio sensor reaches a rich judgment air-fuel ratio and a lean judgment air-fuel ratio during the active air-fuel ratio control, and judges that said air-fuel ratio control is abnormal when the output air-fuel ratio reaches only one of the rich and lean judgment air-fuel ratios.
摘要翻译： 内燃机包括可以存储氧的排气净化催化剂，用于控制排气的空燃比的控制器成为目标空燃比，以及下游侧空燃比传感器。 异常诊断系统执行主动空燃比控制，其将目标空燃比交替地控制为富空燃比，并且基于空气 - 燃料比的输出空燃比来诊断所述排气净化催化剂的异常， 燃油比传感器 当空燃比传感器的输出空燃比在主动空燃比控制期间达到丰富的判断空燃比和稀薄判断空燃比时，异常诊断系统判断为排气净化催化剂异常 并且当输出空燃比仅达到浓和稀的判断空燃比中的一个时，判断所述空燃比控制异常。
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公开(公告)号：US10920704B2
公开(公告)日：2021-02-16
申请号：US15537194
申请日：2015-11-09
发明人： Hiroshi Miyamoto , Toru Kidokoro , Yasushi Iwazaki , Kenji Suzuki
摘要： An abnormality diagnosis system of an air-fuel ratio sensor acquires a blowby gas flow ratio showing a ratio of the flow of blowby gas to the flow of gas to a combustion chamber and an output current of an air-fuel ratio sensor during fuel cut control in which an internal combustion engine stops the feed of fuel to the combustion chamber and at a plurality of points of time of different flows of blowby gas passing through a blowby gas passage and flowing to the downstream side of a throttle valve in the intake passage, calculate an output current of the air-fuel ratio sensor corresponding to a blowby gas flow ratio smaller than the blowby gas flow ratios acquired at the plurality of points of time, based on the acquired blowby gas flow ratio and output current, and judge the air-fuel ratio sensor for abnormality based on the calculated output current.
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公开(公告)号：US09732658B2
公开(公告)日：2017-08-15
申请号：US14496187
申请日：2014-09-25
发明人： Koichi Kitaura , Hiroshi Miyamoto , Masahiro Kubo
IPC分类号： F01N11/00 , F01N13/00 , F01N3/28 , F02B3/00 , F01N3/00 , G01M15/10 , F02D41/14 , F02D41/02 , F02D41/00 , F02D41/30 , F02M63/00 , F02D41/22
CPC分类号： F01N11/007 , F01N2550/02 , F01N2560/025 , F01N2560/14 , F01N2900/0416 , F01N2900/1624 , F02D41/1439 , F02D41/1454 , F02D41/1475 , F02D41/22 , F02D41/222 , F02D2200/0814 , F02D2200/0816 , Y02T10/40 , Y02T10/47
摘要： An abnormality diagnosis system of an internal combustion engine which is provided with an exhaust purification catalyst 20 which can store oxygen is provided with a downstream side air-fuel ratio sensor 41 downstream of the catalyst and a catalyst abnormality diagnosis system which uses an output air-fuel ratio of the downstream side air-fuel ratio sensor when performing active air-fuel ratio control as the basis for diagnosing an exhaust purification catalyst for abnormality. The catalyst abnormality diagnosis system uses the amount of oxygen which is stored in or released from the exhaust purification catalyst in an air-fuel ratio reversal time period in active air-fuel ratio control as the basis to calculate the maximum storable oxygen amount of the exhaust purification catalyst and uses this as the basis to diagnose the exhaust purification catalyst for abnormality.
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公开(公告)号：US09677490B2
公开(公告)日：2017-06-13
申请号：US14504516
申请日：2014-10-02
CPC分类号： F02D41/1441 , F01N3/0864 , F01N3/101 , F01N11/007 , F01N2550/03 , F01N2560/025 , F01N2560/14 , F01N2900/1624 , F02D41/1454 , F02D41/1475 , F02D41/1495 , F02D41/22 , Y02T10/22 , Y02T10/47
摘要： An internal combustion engine comprises an exhaust purification catalyst which can store oxygen, controller for controlling the air-fuel ratio of exhaust gas to become a target air-fuel ratio, and a downstream side air-fuel ratio sensor. An abnormality diagnosis system performs an active air-fuel ratio control which alternately controls the target air-fuel ratio to rich and lean air-fuel ratios, and diagnoses abnormality of said exhaust purification catalyst based on the output air-fuel ratio of the air-fuel ratio sensor. The abnormality diagnosis system judges that the exhaust purification catalyst is abnormal when the output air-fuel ratio of the air-fuel ratio sensor reaches a rich judgment air-fuel ratio and a lean judgment air-fuel ratio during the active air-fuel ratio control, and judges that said air-fuel ratio control is abnormal when the output air-fuel ratio reaches only one of the rich and lean judgment air-fuel ratios.
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公开(公告)号：US20170058749A1
公开(公告)日：2017-03-02
申请号：US15248680
申请日：2016-08-26
CPC分类号： F01N11/007 , F01N3/0864 , F01N3/101 , F01N3/20 , F01N11/005 , F01N13/08 , F01N2390/02 , F01N2550/02 , F01N2900/1402 , F01N2900/1602 , F01N2900/1624 , Y02T10/22 , Y02T10/47
摘要： The internal combustion engine comprises an exhaust purification catalyst 20, a downstream side sensor 41, an air-fuel ratio control unit, and an oxygen storage amount calculating unit for calculating the oxygen excess/deficiency of the inflowing exhaust gas in an air-fuel ratio maintenance time period and cumulatively adding the calculated oxygen excess/deficiency to calculate a maximum oxygen storage amount of the exhaust purification catalyst. The oxygen storage amount calculating unit uses a point of time that an absolute value of an output slope of the downstream side sensor finally becomes less than a threshold value in the air-fuel ratio maintenance time period as an end point of cumulative addition of the oxygen excess/deficiency. The threshold value is made larger when a maximum value of the absolute value of the output slope in the air-fuel ratio maintenance time period is relatively large compared to when the maximum value is relatively small.
摘要翻译： 内燃机包括排气净化催化剂20，下游侧传感器41，空燃比控制单元和氧气存储量计算单元，用于计算空燃比中的流入废气的氧过量/不足 维持时间段，并累计加入计算出的氧过剩/缺乏量，计算排气净化催化剂的最大氧气储存量。 氧气存储量计算单元使用下游侧传感器的输出斜率的绝对值最终变得小于空燃比维持时间段中的阈值的时间点作为氧的累积添加的终点 多余/不足 当空燃比维持时间段的输出斜率的绝对值的最大值相对于最大值相对较小时，阈值变大。
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公开(公告)号：US09512795B2
公开(公告)日：2016-12-06
申请号：US14510703
申请日：2014-10-09
发明人： Kenji Suzuki , Yasushi Iwazaki , Hiroshi Miyamoto
CPC分类号： F02D41/009 , F02D41/0085 , F02D41/1456 , G01M15/104
摘要： An apparatus includes an air-fuel ratio sensor installed in an exhaust passage common to a plurality of cylinders in a multicylinder internal combustion engine, and a control apparatus configured to detect an inter-cylinder air-fuel ratio variation abnormality based on a parameter correlated with a degree of variation in output from the air-fuel ratio sensor. The control apparatus is configured to calculate a division crank angle that bisects an area of a region present in at least one of a rich and a lean sides with respect to a mean value of an output waveform from the air-fuel ratio sensor during one cycle of the internal combustion engine or such a predetermined constant value as corresponds to a center of fluctuation in the output waveform and to identify an abnormal cylinder with a deviation of the air-fuel ratio based on the division crank angle.
摘要翻译： 一种装置，包括安装在多缸内燃机中与多个气缸共用的排气通道中的空燃比传感器，以及控制装置，其被配置为基于与气缸内空燃比变化异常相关的参数来检测气缸间空燃比变化异常 来自空燃比传感器的输出的变化程度。 控制装置被配置为计算分割曲柄角，该分割曲柄角相对于来自空燃比传感器的输出波形的平均值，在一个周期内将存在于丰富侧和偏侧中的至少一个中的区域的区域相等 或与输出波形的波动中心对应的预定常数值，并且基于分割曲柄角度来识别具有空燃比偏差的异常气缸。
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公开(公告)号：US20150086428A1
公开(公告)日：2015-03-26
申请号：US14496187
申请日：2014-09-25
发明人： Koichi Kitaura , Hiroshi Miyamoto , Masahiro Kubo
CPC分类号： F01N11/007 , F01N2550/02 , F01N2560/025 , F01N2560/14 , F01N2900/0416 , F01N2900/1624 , F02D41/1439 , F02D41/1454 , F02D41/1475 , F02D41/22 , F02D41/222 , F02D2200/0814 , F02D2200/0816 , Y02T10/40 , Y02T10/47
摘要： An abnormality diagnosis system of an internal combustion engine which is provided with an exhaust purification catalyst 20 which can store oxygen is provided with a downstream side air-fuel ratio sensor 41 downstream of the catalyst and a catalyst abnormality diagnosis system which uses an output air-fuel ratio of the downstream side air-fuel ratio sensor when performing active air-fuel ratio control as the basis for diagnosing an exhaust purification catalyst for abnormality. The catalyst abnormality diagnosis system uses the amount of oxygen which is stored in or released from the exhaust purification catalyst in an air-fuel ratio reversal time period in active air-fuel ratio control as the basis to calculate the maximum storable oxygen amount of the exhaust purification catalyst and uses this as the basis to diagnose the exhaust purification catalyst for abnormality.
摘要翻译： 具有能够存储氧的排气净化催化剂20的内燃机的异常诊断系统在催化剂下游设置有下游侧空燃比传感器41以及使用输出空气 - 燃料比的催化剂异常诊断系统， 作为用于诊断用于异常的排气净化催化剂的基础的主动空燃比控制时的下游侧空燃比传感器的燃料比。 催化剂异常诊断系统使用在主动空燃比控制中的空燃比反转时间段内存储或排出的排气净化催化剂的氧气的量作为计算排气的最大可储存氧量的基础 净化催化剂，并将其用作诊断异常排气净化催化剂的基础。
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10.发明授权公开(公告)号：US08725387B2
公开(公告)日：2014-05-13
申请号：US13871249
申请日：2013-04-26
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。
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