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公开(公告)号：US10323596B2
公开(公告)日：2019-06-18
申请号：US15536938
申请日：2015-11-10
发明人： Hiroshi Miyamoto , Toru Kidokoro , Yasushi Iwazaki , Kenji Suzuki
摘要： An oil dilution rate calculation system of an internal combustion engine acquires a blowby gas flow ratio showing the ratio of the flow of blowby gas to the flow of gas to the combustion chamber and an output current of the air-fuel ratio sensor during fuel cut control in which the 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 the blowby gas passage and flowing to the downstream side of the throttle valve in the intake passage, and calculate an oil dilution rate based on the acquired blowby gas flow ratio and output current.
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公开(公告)号：US20150107346A1
公开(公告)日：2015-04-23
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缸内空燃比变化异常 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：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：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：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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6.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：US10316779B2
公开(公告)日：2019-06-11
申请号：US15026015
申请日：2014-09-30
发明人： Hiroshi Miyamoto , Toru Kidokoro , Yasushi Iwazaki , Kenji Suzuki
摘要： An abnormality diagnosis system of an air-fuel ratio sensor is provided with an exhaust purification catalyst, an upstream side air-fuel ratio sensor which is provided at an upstream side of the exhaust purification catalyst, a downstream side air-fuel ratio sensor which is provided at a downstream side of the exhaust purification catalyst, and a diagnosis device which uses the outputs of these air-fuel ratio sensors as the basis to diagnose abnormality of the downstream side air-fuel ratio sensor.
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公开(公告)号：US09903292B2
公开(公告)日：2018-02-27
申请号：US14921198
申请日：2015-10-23
发明人： Hiroshi Miyamoto , Toru Kidokoro , Yasushi Iwazaki , Kenji Suzuki , Koji Ide
CPC分类号： F02D41/1495 , F02D41/1441 , F02D41/1454 , F02D41/1494 , F02D41/222 , Y02T10/40
摘要： An abnormality diagnosis system of limit current type air-fuel ratio sensors comprises a current detecting part and a sensor temperature control device. The abnormality diagnosis system uses the current detecting part to detect the output current of the air-fuel ratio sensor when the air-fuel ratio is made the rich air-fuel ratio in the state where temperature of the air-fuel ratio is made the first temperature and when the air-fuel ratio is made the rich air-fuel ratio in the state where the temperature of the air-fuel ratio is made a second temperature higher than the first temperature. It is judged that the air-fuel ratio sensor is abnormal if the output current when the temperature of the air-fuel ratio sensor is the first temperature is larger than the output current when it is the second temperature by a predetermined value or more.
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公开(公告)号：US09863354B2
公开(公告)日：2018-01-09
申请号：US15083378
申请日：2016-03-29
发明人： Shuntaro Okazaki , Kenji Suzuki , Hiroshi Miyamoto , Yuji Miyoshi
CPC分类号： F02D41/1495 , F01N3/101 , F01N11/007 , F01N13/0093 , F01N2550/00 , F01N2560/025 , F01N2610/03 , F01N2900/0408 , F01N2900/0416 , F01N2900/0418 , F01N2900/1402 , F01N2900/1624 , F02D41/0295 , F02D41/1408 , F02D41/1441 , F02D41/1454 , F02D41/1456 , F02D41/1475 , F02D41/222 , F02D2200/0814 , F02D2200/0816 , Y02T10/22 , Y02T10/47
摘要： An exhaust purification system comprises an exhaust purification catalyst, a downstream side air-fuel ratio sensor and a control device. The control device makes the air-fuel ratio of the exhaust gas change to an air-fuel ratio at a rich side from the prior air-fuel ratio as air-fuel ratio rich increasing control when the air-fuel ratio of the exhaust gas is made a rich air-fuel ratio and the output air-fuel ratio of the downstream side air-fuel ratio sensor is maintained at a lean judged air-fuel ratio or more, and judges that the downstream side air-fuel ratio sensor suffers from an abnormality, when, due to the air-fuel ratio rich increasing control, the air-fuel ratio of the exhaust gas is made to change to the rich side air-fuel ratio and the output air-fuel ratio of the downstream side air-fuel ratio sensor changes to the lean side.
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公开(公告)号：US09835104B2
公开(公告)日：2017-12-05
申请号：US15083449
申请日：2016-03-29
发明人： Shuntaro Okazaki , Kenji Suzuki , Hiroshi Miyamoto , Yuji Miyoshi
CPC分类号： F02D41/1495 , F01N3/101 , F01N11/007 , F01N13/008 , F01N2550/00 , F01N2560/025 , F01N2610/03 , F01N2900/0408 , F01N2900/0416 , F01N2900/0418 , F01N2900/1402 , F01N2900/1624 , F02D41/0235 , F02D41/1408 , F02D41/1439 , F02D41/1454 , F02D41/1456 , F02D41/1475 , F02D41/2454 , F02D2200/0814 , Y02T10/47
摘要： An exhaust purification system comprising an exhaust purification catalyst, a downstream side air-fuel ratio sensor, and a control device performing air-fuel ratio control for controlling an air-fuel ratio of exhaust gas and abnormality diagnosis control for diagnosing the downstream side air-fuel ratio sensor. In the air-fuel ratio control, the control device alternately and repeatedly switches the air-fuel ratio of the exhaust gas flowing into the exhaust purification catalyst between a rich air-fuel ratio and a lean air-fuel ratio. In the abnormality diagnosis control, the control device judges that the downstream side air-fuel ratio sensor has become abnormal when the air-fuel ratio of the exhaust gas is made the rich air-fuel ratio by the air-fuel control and the output air-fuel ratio of the downstream side air-fuel ratio sensor changes from an air-fuel ratio richer than a predetermined lean judged air-fuel ratio to an lean air-fuel ratio.
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