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1. 发明申请

US20130073184A1 INTER-CYLINDER AIR-FUEL RATIO IMBALANCE DETERMINING APPARATUS FOR INTERNAL COMBUSTION ENGINE 有权
标题翻译：内燃机空燃比不确定度测定装置
公开(公告)号：US20130073184A1
公开(公告)日：2013-03-21
申请号：US13612310
申请日：2012-09-12
申请人： Hiroshi Miyamoto , Yasushi Iwazaki , Shuntaro Okazaki , Kenji Suzuki
发明人： Hiroshi Miyamoto , Yasushi Iwazaki , Shuntaro Okazaki , Kenji Suzuki
IPC分类号： F02D41/26 , F02D41/30
CPC分类号： F02D41/0085 , F02D41/1443 , F02D41/1454 , F02D41/1456 , F02D41/1495
摘要： An inter-cylinder air-fuel ratio imbalance determining apparatus for an internal combustion engine includes an air-fuel ratio sensor; fuel injection valves; an instructed fuel injection amount control unit; and an imbalance determination unit configured: to acquire a time-differential-value corresponding value that is an amount of change per predetermined time in an output value of the sensor or a detected air-fuel ratio represented by the output value; to acquire a positive gradient corresponding value based on a positive value of the time-differential-value corresponding value; to acquire a negative gradient corresponding value based on a negative value of the time-differential-value corresponding value; to determine an imbalance determination threshold based on a magnitude of a ratio of the negative gradient corresponding value to the positive gradient corresponding value; and to determine whether inter-cylinder air-fuel ratio imbalance has occurred by comparing a magnitude of the negative gradient corresponding value with the imbalance determination threshold.
摘要翻译：用于内燃机的气缸间空燃比不平衡确定装置包括空燃比传感器; 燃油喷射阀; 指示燃料喷射量控制单元; 以及不平衡确定单元，被配置为获取作为所述传感器的输出值中的每预定时间的变化量的时间微分值对应值或由所述输出值表示的检测到的空燃比; 基于时间微分值对应值的正值来获取正梯度对应值; 基于时间 - 微分值对应值的负值来获取负梯度对应值; 基于负梯度对应值与正梯度对应值的比值的大小来确定不平衡确定阈值; 并且通过将负梯度对应值的大小与不平衡确定阈值进行比较来确定是否发生了缸间空燃比不平衡。

2. 发明授权

US09194316B2 Inter-cylinder air-fuel ratio imbalance determining apparatus for internal combustion engine 有权
标题翻译：用于内燃机的缸内空燃比不平衡确定装置
公开(公告)号：US09194316B2
公开(公告)日：2015-11-24
申请号：US13612310
申请日：2012-09-12
申请人： Hiroshi Miyamoto , Yasushi Iwazaki , Shuntaro Okazaki , Kenji Suzuki
发明人： Hiroshi Miyamoto , Yasushi Iwazaki , Shuntaro Okazaki , Kenji Suzuki
IPC分类号： G06F7/00 , G06F17/00 , F02D41/00 , F02D41/14
CPC分类号： F02D41/0085 , F02D41/1443 , F02D41/1454 , F02D41/1456 , F02D41/1495
摘要： An inter-cylinder air-fuel ratio imbalance determining apparatus for an internal combustion engine includes an air-fuel ratio sensor; fuel injection valves; an instructed fuel injection amount control unit; and an imbalance determination unit configured: to acquire a time-differential-value corresponding value that is an amount of change per predetermined time in an output value of the sensor or a detected air-fuel ratio represented by the output value; to acquire a positive gradient corresponding value based on a positive value of the time-differential-value corresponding value; to acquire a negative gradient corresponding value based on a negative value of the time-differential-value corresponding value; to determine an imbalance determination threshold based on a magnitude of a ratio of the negative gradient corresponding value to the positive gradient corresponding value; and to determine whether inter-cylinder air-fuel ratio imbalance has occurred by comparing a magnitude of the negative gradient corresponding value with the imbalance determination threshold.
摘要翻译：用于内燃机的气缸间空燃比不平衡确定装置包括空燃比传感器; 燃油喷射阀; 指示燃料喷射量控制单元; 以及不平衡确定单元，被配置为获取作为所述传感器的输出值中的每预定时间的变化量的时间微分值对应值或由所述输出值表示的检测到的空燃比; 基于时间微分值对应值的正值来获取正梯度对应值; 基于时间 - 微分值对应值的负值来获取负梯度对应值; 基于负梯度对应值与正梯度对应值的比值的大小来确定不平衡确定阈值; 并且通过将负梯度对应值的大小与不平衡确定阈值进行比较来确定是否发生了缸间空燃比不平衡。

3. 发明申请

US20140129116A1 INTER-CYLINDER AIR-FUEL RATIO VARIATION ABNORMALITY DETECTION APPARATUS FOR MULTICYLINDER INTERNAL COMBUSTION ENGINE 审中-公开
标题翻译：多缸内燃机的气缸内空燃比变化异常检测装置
公开(公告)号：US20140129116A1
公开(公告)日：2014-05-08
申请号：US14072374
申请日：2013-11-05
申请人： Kenji Suzuki , Yasushi Iwazaki , Koichi Kitaura , Hiroshi Miyamoto
发明人： Kenji Suzuki , Yasushi Iwazaki , Koichi Kitaura , Hiroshi Miyamoto
IPC分类号： F02D41/02
CPC分类号： F02D41/1495 , F02D41/1441 , F02D41/1498 , F02D2250/24
摘要： An inter-cylinder air-fuel ratio variation abnormality detection apparatus for a multicylinder internal combustion engine according to the present invention detects variation abnormality based on a rotational fluctuation of the internal combustion engine. Number-of-rotations feedback control is preformed to make the number of rotations of the internal combustion engine equal to a predetermined target number of rotations. The amount of power generated by a power generation device driven by the internal combustion engine is controlled so as to bring the load on the internal combustion engine into a target range when the abnormality detection is carried out.
摘要翻译：根据本发明的用于多缸内燃机的缸内空燃比变化异常检测装置基于内燃机的旋转波动检测变化异常。进行转数反馈控制以使内燃机的转数等于预定的目标转数。控制由内燃机驱动的发电装置产生的动力量，以便在执行异常检测时使内燃机的负荷达到目标范围。

4. 发明申请

US20130253802A1 INTER-CYLINDER AIR-FUEL RATIO IMBALANCE DETECTION APPARATUS FOR INTERNAL COMBUSTION ENGINE 审中-公开
标题翻译：内燃机用气缸比重不平衡检测装置
公开(公告)号：US20130253802A1
公开(公告)日：2013-09-26
申请号：US13827660
申请日：2013-03-14
申请人： Hiroshi Miyamoto , Kenji Suzuki , Yasushi Iwazaki , Takanori Sasaki
发明人： Hiroshi Miyamoto , Kenji Suzuki , Yasushi Iwazaki , Takanori Sasaki
IPC分类号： F02D43/04
CPC分类号： F02D43/04 , F02D41/008 , F02D41/1456 , F02D41/1495 , F02D2041/001 , F02D2250/34
摘要： An air-fuel ratio imbalance detection apparatus includes an air-fuel ratio sensor that is arranged in an exhaust passage of an internal combustion engine and that includes an electrode and a diffusion layer provided on the electrode; an estimating unit configured to estimate or detect an output variation amount that is an amount of variation in an output of the air-fuel ratio sensor due to an influence of a pressure pulsation of exhaust gas from the internal combustion engine; and a determination unit configured to determine whether there is an air-fuel ratio imbalance among cylinders of the internal combustion engine, on the basis of the output variation amount and a determination value based on the output of the air-fuel ratio sensor.
摘要翻译：空燃比不平衡检测装置包括：空燃比传感器，其设置在内燃机的排气通路中，并且包括设置在电极上的电极和扩散层; 估计单元，其被配置为估计或检测作为所述空燃比传感器的输出的变化量的输出变化量，所述输出变化量是由于来自所述内燃机的废气的压力脉动的影响; 以及确定单元，被配置为基于所述输出变化量和基于所述空燃比传感器的输出的确定值来确定所述内燃机的气缸中是否存在空燃比不平衡。

5. 发明授权

US09506416B2 Inter-cylinder air-fuel ratio variation abnormality detection apparatus for multicylinder internal combustion engine 有权
标题翻译：用于多缸内燃机的缸内空燃比变化异常检测装置
公开(公告)号：US09506416B2
公开(公告)日：2016-11-29
申请号：US14095567
申请日：2013-12-03
申请人： Kenji Suzuki , Hiroshi Miyamoto , Yasushi Iwazaki
发明人： Kenji Suzuki , Hiroshi Miyamoto , Yasushi Iwazaki
IPC分类号： F02D41/00 , F02D41/14
CPC分类号： F02D41/1495 , F02D41/0085 , F02D41/1456
摘要： A first parameter correlated with a degree of a variation in the output from the air-fuel ratio sensor is calculated. A possible range of a second parameter representing a degree of a variation in air-fuel ratio among the cylinders is determined based on the first parameter. The first parameter is calculated with an air-fuel ratio of a predetermined cylinder forcibly changed. A difference between the unchanged first parameter and the forcibly changed first parameter is determined. A first characteristic representing a relation between the second parameter and the difference is determined based on the possible range of the second parameter and the difference. One of the determination value and the first parameter calculated before the forced change is corrected based on inclination of the determined first characteristic.
摘要翻译：计算与空燃比传感器的输出的变化程度相关的第一参数。基于第一参数来确定表示气缸中的空燃比的变化程度的第二参数的可能范围。第一参数是以预定的气缸的空燃比强制变化的方式计算的。确定未改变的第一参数和强制改变的第一参数之间的差异。基于第二参数的可能范围和差异来确定代表第二参数和差异之间的关系的第一特征。基于确定的第一特性的倾斜度来校正在强制改变之前计算的确定值和第一参数中的一个。

6. 发明授权

US09328685B2 Inter-cylinder air-fuel ratio variation abnormality detection apparatus for multicylinder internal combustion engine 有权
标题翻译：用于多缸内燃机的缸内空燃比变化异常检测装置
公开(公告)号：US09328685B2
公开(公告)日：2016-05-03
申请号：US14212400
申请日：2014-03-14
申请人： Kenji Suzuki , Hiroshi Miyamoto , Yasushi Iwazaki , Senji Kato
发明人： Kenji Suzuki , Hiroshi Miyamoto , Yasushi Iwazaki , Senji Kato
IPC分类号： F02D41/00 , F02D41/14 , F02D41/24
CPC分类号： F02D41/1495 , F02D41/0085 , F02D41/1441 , F02D41/1456 , F02D41/2438
摘要： A first parameter correlated with a degree of fluctuation of output from an air-fuel ratio sensor is calculated, and whether or not the calculated first parameter has a value between a predetermined primary determination upper-limit value α1H and a primary determination lower-limit value is determined. Such forced active control as reduces an air-fuel ratio shift in one of the cylinders which is subjected to a most significant air-fuel ratio shift is performed when the calculated first parameter is determined to have a value between the predetermined primary determination upper-limit value and the primary determination lower-limit value. A first parameter is calculated while the forced active control is in execution. The calculated first parameter is compared with a predetermined secondary determination value to determine whether or not variation abnormality is present.
摘要翻译：计算与空燃比传感器的输出的波动程度相关的第一参数，并且计算出的第一参数是否具有预定的一次判定上限值α1H和一次判定下限值之间的值决心，决意，决定。当所计算出的第一参数被确定为具有预定的主要确定上限之间的值时，执行这种强制主动控制，以减少经受最大空燃比移动的一个气缸中的空燃比偏移值和主要判定下限值。在强制主动控制正在执行时计算第一个参数。将计算出的第一参数与预定的次级判定值进行比较，以确定是否存在变化异常。

7. 发明申请

US20140283801A1 INTER-CYLINDER AIR-FUEL RATIO VARIATION ABNORMALITY DETECTION APPARATUS FOR MULTICYLINDER INTERNAL COMBUSTION ENGINE 有权
标题翻译：多缸内燃机的气缸内空燃比变化异常检测装置
公开(公告)号：US20140283801A1
公开(公告)日：2014-09-25
申请号：US14212400
申请日：2014-03-14
申请人： Kenji Suzuki , Hiroshi Miyamoto , Yasushi Iwazaki , Senji Kato
发明人： Kenji Suzuki , Hiroshi Miyamoto , Yasushi Iwazaki , Senji Kato
IPC分类号： F02D41/14
CPC分类号： F02D41/1495 , F02D41/0085 , F02D41/1441 , F02D41/1456 , F02D41/2438
摘要： A first parameter correlated with a degree of fluctuation of output from an air-fuel ratio sensor is calculated, and whether or not the calculated first parameter has a value between a predetermined primary determination upper-limit value α1H and a primary determination lower-limit value is determined. Such forced active control as reduces an air-fuel ratio shift in one of the cylinders which is subjected to a most significant air-fuel ratio shift is performed when the calculated first parameter is determined to have a value between the predetermined primary determination upper-limit value and the primary determination lower-limit value. A first parameter is calculated while the forced active control is in execution. The calculated first parameter is compared with a predetermined secondary determination value to determine whether or not variation abnormality is present.
摘要翻译：计算与空燃比传感器的输出的波动程度相关的第一参数，并且计算出的第一参数是否具有预定的一次判定上限值α1H和一次判定下限值之间的值决心，决意，决定。当所计算出的第一参数被确定为具有预定的主要确定上限之间的值时，执行这种强制主动控制，以减少经受最大空燃比移动的一个气缸中的空燃比偏移值和主要判定下限值。在强制主动控制正在执行时计算第一个参数。将计算出的第一参数与预定的次级判定值进行比较，以确定是否存在变化异常。

8. 发明申请

US20140156205A1 INTER-CYLINDER AIR-FUEL RATIO VARIATION ABNORMALITY DETECTION APPARATUS FOR MULTICYLINDER INTERNAL COMBUSTION ENGINE 有权
标题翻译：多缸内燃机的气缸内空燃比变化异常检测装置
公开(公告)号：US20140156205A1
公开(公告)日：2014-06-05
申请号：US14095567
申请日：2013-12-03
申请人： Kenji Suzuki , Hiroshi Miyamoto , Yasushi Iwazaki
发明人： Kenji Suzuki , Hiroshi Miyamoto , Yasushi Iwazaki
IPC分类号： F02D41/14
CPC分类号： F02D41/1495 , F02D41/0085 , F02D41/1456
摘要： A first parameter correlated with a degree of a variation in the output from the air-fuel ratio sensor is calculated. A possible range of a second parameter representing a degree of a variation in air-fuel ratio among the cylinders is determined based on the first parameter. The first parameter is calculated with an air-fuel ratio of a predetermined cylinder forcibly changed. A difference between the unchanged first parameter and the forcibly changed first parameter is determined. A first characteristic representing a relation between the second parameter and the difference is determined based on the possible range of the second parameter and the difference. One of the determination value and the first parameter calculated before the forced change is corrected based on inclination of the determined first characteristic.
摘要翻译：计算与空燃比传感器的输出的变化程度相关的第一参数。基于第一参数来确定表示气缸中的空燃比的变化程度的第二参数的可能范围。第一参数是以预定的气缸的空燃比强制变化的方式计算的。确定未改变的第一参数和强制改变的第一参数之间的差异。基于第二参数的可能范围和差异来确定代表第二参数和差异之间的关系的第一特征。基于确定的第一特性的倾斜度来校正在强制改变之前计算的确定值和第一参数中的一个。

9. 发明授权

US09850840B2 Diagnosis system of internal combustion engine 有权
公开(公告)号：US09850840B2
公开(公告)日：2017-12-26
申请号：US14900792
申请日：2013-06-26
申请人： Hiroshi Miyamoto , Yuji Miyoshi , Yasushi Iwazaki , Toru Kidokoro , Keiichiro Aoki
发明人： Hiroshi Miyamoto , Yuji Miyoshi , Yasushi Iwazaki , Toru Kidokoro , Keiichiro Aoki
IPC分类号： F02D41/12 , F02D41/14 , F01N3/08 , F01N13/00
CPC分类号： F02D41/126 , F01N3/08 , F01N13/009 , F01N2560/025 , F01N2560/14 , F01N2900/0416 , F02D41/1439 , F02D41/1441 , F02D41/1456 , F02D41/1495
摘要： An electronic control unit (ECU) of an internal combustion engine, which includes an air-fuel ratio sensor arranged at a downstream side of an exhaust purification catalyst, is configured to judge if a state of the air-fuel ratio sensor is normal or abnormal based on the first characteristic of change of air-fuel ratio and, if a judgment cannot be made based on the first characteristic, the ECU is configured to judge if the state of the air-fuel ratio sensor is normal or abnormal based on a second characteristic of change of air-fuel ratio. As a result, it is possible to suppress the effects of the change of state of the exhaust purification catalyst while accurately diagnosing the abnormality of deterioration of response of a downstream side air-fuel ratio sensor.

10. 发明授权

US09719449B2 Diagnosis system of internal combustion engine 有权
公开(公告)号：US09719449B2
公开(公告)日：2017-08-01
申请号：US14900645
申请日：2013-06-26
申请人： Hiroshi Miyamoto , Keiichiro Aoki , Yasushi Iwazaki
发明人： Hiroshi Miyamoto , Keiichiro Aoki , Yasushi Iwazaki
IPC分类号： F01N3/00 , F02D41/14 , F02D41/12 , F01N11/00 , F01N3/10 , F02D41/02 , F02D41/22 , F01N13/00
CPC分类号： F02D41/1495 , F01N3/10 , F01N11/007 , F01N13/009 , F01N2550/02 , F01N2900/0416 , F01N2900/1624 , F02D41/0295 , F02D41/123 , F02D41/1441 , F02D41/1454 , F02D2041/228 , F02D2200/0814 , F02D2200/0816 , Y02T10/47
摘要： An internal combustion engine comprises an exhaust purification catalyst arranged in an exhaust passage of the internal combustion engine and being able to store oxygen in inflowing exhaust gas and an air-fuel ratio sensor arranged at a downstream side of the exhaust purification catalyst in a direction of exhaust flow and detecting an air-fuel ratio of exhaust gas flowing out from the exhaust purification catalyst and stops or decreases a feed of fuel to a combustion chamber as fuel cut control. The abnormality diagnosis system calculates a characteristic of change of an air-fuel ratio based on an output air-fuel ratio output from the air-fuel ratio sensor at the time when the output air-fuel ratio first passes a part of an air-fuel ratio region of a stoichiometric air-fuel ratio or more after an end of the fuel cut control, and diagnoses abnormality of the air-fuel ratio sensor based on the characteristic of change of the air-fuel ratio. As a result, the diagnosis system can diagnose the abnormality of deterioration of response of the downstream side air-fuel ratio sensor when necessary without fail when performing fuel cut control.

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