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41. 发明授权

US08560208B2 Inter-cylinder air-fuel ratio imbalance determination 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：US08560208B2
公开(公告)日：2013-10-15
申请号：US13505849
申请日：2009-11-05
申请人： Hiroshi Miyamoto , Yasushi Iwazaki , Hiroshi Sawada
发明人： Hiroshi Miyamoto , Yasushi Iwazaki , Hiroshi Sawada
IPC分类号： B60T7/12
CPC分类号： F02D41/0085 , F02D41/0065 , F02D41/1454 , Y02T10/47
摘要： An inter-cylinder air-fuel ratio imbalance determination apparatus (determination apparatus) according to the present invention obtains, as an “EGR supplying state imbalance determination parameter”, a value corresponding to a differential value d(abyfs)dt of a detected air-fuel ratio abyfs represented by an output value of an air-fuel ratio sensor when an EGR gas is being supplied, and obtains, as an “EGR stop state imbalance determination parameter”, a value corresponding to a differential value d(abyfs)dt when an EGR gas supply is being stopped. The determination apparatus obtains an “EGR-causing imbalance determination parameter Pegr” by subtracting the EGR stop state imbalance determination parameter Poff from the EGR supplying state imbalance determination parameter Pon, and determines that an inter-cylinder air-fuel ratio imbalance state has occurred due to the supply of the EGR gas when the parameter Pegr is larger than a threshold Pegrth.
摘要翻译：根据本发明的气缸内空燃比不平衡判定装置（判定装置），作为“EGR供给状态不平衡判定参数”，获得与检测到的空气 - 燃料比不平衡判定装置的差分值d（abyfs）dt对应的值，在EGR气体供给时由空燃比传感器的输出值表示的燃料比abyfs，作为“EGR停止状态不平衡判定参数”，获得与差分值d（abyfs）dt对应的值正在停止EGR气体供应。确定装置通过从EGR供应状态不平衡确定参数Pon中减去EGR停止状态不平衡确定参数Poff而获得“EGR导致不平衡确定参数Pegr”，并且确定缸间空燃比不平衡状态已经发生当参数Pegr大于阈值Pegrth时，供应EGR气体。

42. 发明授权

US08260576B2 Exhaust gas sensor abnormality diagnostic device 有权
公开(公告)号：US08260576B2
公开(公告)日：2012-09-04
申请号：US13287460
申请日：2011-11-02
申请人： Yasushi Iwazaki , Hiroshi Sawada , Takahiro Joko , Masaya Kawaji
发明人： Yasushi Iwazaki , Hiroshi Sawada , Takahiro Joko , Masaya Kawaji
IPC分类号： G06F11/30
CPC分类号： G01N27/4175 , F02D41/1454 , F02D41/222
摘要： An exhaust gas sensor abnormality diagnostic device includes an exhaust gas sensor, and a judgment means that judges whether execution conditions are established for making an abnormality diagnosis of element breakage in the exhaust gas sensor. The device also includes an abnormality diagnosis means that makes the abnormality diagnosis in accordance with an output signal generated by the exhaust gas sensor. Further, when the integrated value of intake air amounts of an internal combustion engine is not smaller than a predetermined value, the judgment means judges that the execution conditions are established. The abnormality diagnosis means cancels the establishment of the execution conditions when an intake air amount of the internal combustion engine remains less than a predetermined value for a predetermined period of time.

43. 发明申请

US20060277971A1 Method and apparatus for detecting exhaust gas sensor defect 失效
标题翻译：检测废气传感器缺陷的方法和装置
公开(公告)号：US20060277971A1
公开(公告)日：2006-12-14
申请号：US11448794
申请日：2006-06-08
申请人： Kenji Tashiro , Yasushi Iwazaki , Masanobu Kanamaru , Hiroshi Sawada , Masaya Kawaji , Takashi Matsui
发明人： Kenji Tashiro , Yasushi Iwazaki , Masanobu Kanamaru , Hiroshi Sawada , Masaya Kawaji , Takashi Matsui
IPC分类号： G01N33/00
CPC分类号： G01N27/4065
摘要： An air-fuel ratio sensor that outputs a sensor signal used for the feedback control of an air-fuel ratio is provided. It is determined whether an element crack is present by applying a reverse voltage to the air-fuel ratio sensor. The value of the sensor signal output from the air-fuel ratio sensor is corrected during a time period “A”. The time period “A” consists of a reverse-voltage application time period in which the reverse voltage is applied, and a return time period “T” after application of the reverse voltage ends. The return time period “T” is set based on sensor impedance correlated with the internal resistance of the air-fuel ratio sensor. The return time period “T” decreases as the sensor impedance decreases.
摘要翻译：提供输出用于空燃比的反馈控制的传感器信号的空燃比传感器。通过向空燃比传感器施加反向电压来确定是否存在元件裂纹。在空燃比传感器输出的传感器信号的值在时间段“A”期间被校正。时间段“A”包括施加反向电压的反向电压施加时间段，反向电压施加后的返回时间段“T”结束。基于与空燃比传感器的内阻相关的传感器阻抗来设定返回时间段“T”。返回时间段“T”随着传感器阻抗的减小而减小。

44. 发明授权

US09194315B2 Air-fuel ratio imbalance among cylinders determining apparatus for an internal combustion engine 有权
标题翻译：用于内燃机的气缸确定装置之间的空燃比不平衡
公开(公告)号：US09194315B2
公开(公告)日：2015-11-24
申请号：US13144194
申请日：2009-11-26
申请人： Yasushi Iwazaki , Hiroshi Miyamoto , Hiroshi Sawada , Keiichiro Aoki
发明人： Yasushi Iwazaki , Hiroshi Miyamoto , Hiroshi Sawada , Keiichiro Aoki
IPC分类号： F01N3/10 , G01N7/00 , F02D41/00 , G01N27/419 , F02D41/14
CPC分类号： F02D41/0085 , F02D41/1441 , F02D41/1454 , F02D41/1475 , G01N27/419
摘要： An air-fuel ratio imbalance among cylinders determining apparatus (a determining apparatus) according to an aspect of the present invention, obtains a parameter X for imbalance determination which becomes larger as a variation of an air-fuel ratio of an exhaust gas passing through a position at which the air-fuel ratio sensor is disposed becomes larger, based on an output value Vabyfs of an air-fuel ratio sensor 67. At the same time, the determining apparatus changes a target air-fuel ratio which is a target value of an air-fuel ratio of a mixture supplied to an engine to “an air-fuel ratio (a target rich air-fuel ratio AFrich or a target lean air-fuel ratio AFlean) other than a stoichiometric air-fuel ratio” from the stoichiometric air-fuel ratio. Accordingly, the determining apparatus can obtain the parameter X for imbalance determination in a state in which a responsivity of the air-fuel ratio sensor 67 is not low. As a result, it can make a determination on the air-fuel ratio imbalance among cylinders with high accuracy.
摘要翻译：根据本发明的一个方面的气缸确定装置（确定装置）之间的空燃比不平衡获得作为不平衡确定的参数X随着通过的排气的空燃比的变化而变大基于空燃比传感器67的输出值Vabyfs，设置空燃比传感器的位置变大。同时，确定装置将作为目标值的目标空燃比向发动机供给的混合物的空燃比为“理论空燃比以外的理论空燃比以外的空燃比（目标浓空燃比AFrich或目标稀空燃比AFlean）” 空燃比。因此，在空燃比传感器67的响应度不低的状态下，确定装置可以获得用于不平衡确定的参数X. 因此，可以高精度地确定气缸之间的空燃比不平衡。

45. 发明授权

US08452521B2 Inter-cylinder air-fuel ratio imbalance determination apparatus for an 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：US08452521B2
公开(公告)日：2013-05-28
申请号：US13509372
申请日：2009-11-12
申请人： Yasushi Iwazaki , Hiroshi Miyamoto , Hiroshi Sawada , Keiichiro Aoki
发明人： Yasushi Iwazaki , Hiroshi Miyamoto , Hiroshi Sawada , Keiichiro Aoki
IPC分类号： B60T7/12
CPC分类号： F02D41/0085 , F02D41/1441 , F02D41/1455
摘要： An inter-cylinder air-fuel imbalance determination apparatus according to the present invention obtains, based on the output value of the air-fuel ratio sensor, an air-fuel ratio fluctuation indicating amount whose absolute value becomes larger as a fluctuation of the air-fuel ratio of the exhaust gas passing through the air-fuel ratio sensor becomes larger, and further obtains an imbalance determination parameter which becomes larger as an absolute value of the air-fuel ratio fluctuation indicating amount becomes larger. In addition, the determination apparatus obtains an average value of the air-fuel ratio of the exhaust gas when the imbalance determination parameter is being obtained, and obtains an imbalance determination threshold which becomes smaller as the average value of the air-fuel ratio is closer to the stoichiometric air-fuel ratio. The determination apparatus determines that an inter-cylinder air-fuel ratio imbalance state has been occurring when the imbalance determination parameter is larger than the imbalance determination threshold.
摘要翻译：根据本发明的气缸内空气燃料不平衡确定装置，基于空燃比传感器的输出值，获得空气 - 燃料比传感器的绝对值变大的空燃比变动指示量，通过空燃比传感器的废气的燃料比变大，进一步得到随着空燃比变动指示量的绝对值变大而变大的不平衡判定参数。此外，确定装置获得当获得不平衡确定参数时排气的空燃比的平均值，并且获得当空燃比的平均值接近时变小的不平衡确定阈值达到化学计量空燃比。当不平衡确定参数大于不平衡确定阈值时，确定装置确定已经发生了缸间空燃比不平衡状态。

46. 发明申请

US20120215427A1 INTER-CYLINDER AIR-FUEL RATIO IMBALANCE DETERMINATION 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测定装置
公开(公告)号：US20120215427A1
公开(公告)日：2012-08-23
申请号：US13505849
申请日：2009-11-05
申请人： Hiroshi Miyamoto , Yasushi Iwazaki , Hiroshi Sawada
发明人： Hiroshi Miyamoto , Yasushi Iwazaki , Hiroshi Sawada
IPC分类号： F02D41/26 , F02M25/07
CPC分类号： F02D41/0085 , F02D41/0065 , F02D41/1454 , Y02T10/47
摘要： An inter-cylinder air-fuel ratio imbalance determination apparatus (determination apparatus) according to the present invention obtains, as an “EGR supplying state imbalance determination parameter”, a value corresponding to a differential value d(abyfs)dt of a detected air-fuel ratio abyfs represented by an output value of an air-fuel ratio sensor when an EGR gas is being supplied, and obtains, as an “EGR stop state imbalance determination parameter”, a value corresponding to a differential value d(abyfs)dt when an EGR gas supply is being stopped. The determination apparatus obtains an “EGR-causing imbalance determination parameter Pegr” by subtracting the EGR stop state imbalance determination parameter Poff from the EGR supplying state imbalance determination parameter Pon, and determines that an inter-cylinder air-fuel ratio imbalance state has occurred due to the supply of the EGR gas when the parameter Pegr is larger than a threshold Pegrth.
摘要翻译：根据本发明的气缸内空燃比不平衡判定装置（判定装置），作为“EGR供给状态不平衡判定参数”，获得与检测到的空气 - 燃料比不平衡判定装置的差分值d（abyfs）dt对应的值，在EGR气体供给时由空燃比传感器的输出值表示的燃料比abyfs，作为“EGR停止状态不平衡判定参数”，获得与差分值d（abyfs）dt对应的值正在停止EGR气体供应。确定装置通过从EGR供应状态不平衡确定参数Pon中减去EGR停止状态不平衡确定参数Poff而获得“EGR导致不平衡确定参数Pegr”，并且确定缸间空燃比不平衡状态已经发生当参数Pegr大于阈值Pegrth时，供应EGR气体。

47. 发明授权

US08214176B2 Exhaust gas sensor abnormality diagnostic device 有权
标题翻译：废气传感器异常诊断装置
公开(公告)号：US08214176B2
公开(公告)日：2012-07-03
申请号：US12226774
申请日：2007-06-26
申请人： Yasushi Iwazaki , Hiroshi Sawada , Takahiro Joko , Masaya Kawaji
发明人： Yasushi Iwazaki , Hiroshi Sawada , Takahiro Joko , Masaya Kawaji
IPC分类号： G06F19/00
CPC分类号： G01N27/4175 , F02D41/1454 , F02D41/222
摘要： An exhaust gas sensor abnormality diagnostic device includes an exhaust gas sensor, and a judgment means that judges whether execution conditions are established for making an abnormality diagnosis of element breakage in the exhaust gas sensor. The device also includes an abnormality diagnosis means that makes the abnormality diagnosis in accordance with an output signal generated by the exhaust gas sensor. Further, when the integrated value of intake air amounts of an internal combustion engine is not smaller than a predetermined value, the judgment means judges that the execution conditions are established. The abnormality diagnosis means cancels the establishment of the execution conditions when an intake air amount of the internal combustion engine remains less than a predetermined value for a predetermined period of time.
摘要翻译：废气传感器异常诊断装置包括排气传感器，以及判断装置，其判断在废气传感器中进行元件破损的异常诊断的执行条件。该装置还包括根据由排气传感器产生的输出信号进行异常诊断的异常诊断装置。此外，当内燃机的进气量的积分值不小于预定值时，判断装置判定执行条件成立。当内燃机的进气量保持小于预定值一段预定时间时，异常诊断装置取消执行条件的建立。

48. 发明申请

US20120232773A1 INTER-CYLINDER AIR-FUEL RATIO IMBALANCE DETERMINATION APPARATUS FOR AN INTERNAL COMBUSTION ENGINE 有权
标题翻译：内燃机的气缸内空气燃料比重测定装置
公开(公告)号：US20120232773A1
公开(公告)日：2012-09-13
申请号：US13509372
申请日：2009-11-12
申请人： Yasushi Iwazaki , Hiroshi Miyamoto , Hiroshi Sawada , Keiichiro Aoki
发明人： Yasushi Iwazaki , Hiroshi Miyamoto , Hiroshi Sawada , Keiichiro Aoki
IPC分类号： F02D41/26
CPC分类号： F02D41/0085 , F02D41/1441 , F02D41/1455
摘要： An inter-cylinder air-fuel ratio imbalance determination apparatus (determination apparatus) according to the present invention obtains, based on the output value of the air-fuel ratio sensor 67, an air-fuel ratio fluctuation indicating amount whose absolute value becomes larger as a fluctuation of the air-fuel ratio of the exhaust gas passing through a position at which the air-fuel ratio sensor is disposed becomes larger, and further obtains an imbalance determination parameter which becomes larger as an absolute value of the air-fuel ratio fluctuation indicating amount becomes larger. In addition, the determination apparatus obtains an average value of the air-fuel ratio of the exhaust gas during a period in which the imbalance determination parameter is being obtained, and obtains an imbalance determination threshold which becomes smaller as the average value of the air-fuel ratio is closer to the stoichiometric air-fuel ratio. The determination apparatus determines that an inter-cylinder air-fuel ratio imbalance state has been occurring when the imbalance determination parameter is larger than the imbalance determination threshold.
摘要翻译：根据本发明的气缸内空燃比不平衡判定装置（判定装置），基于空燃比传感器67的输出值，求出绝对值变大的空燃比变动指示量通过设置空燃比传感器的位置的废气的空燃比的波动变大，进而获得作为空燃比变动的绝对值变大的不平衡判定参数指示量变大。此外，确定装置获得在获得不平衡确定参数的时段期间的排气的空燃比的平均值，并且获得作为空气 - 燃料的平均值变小的不平衡确定阈值，燃料比接近化学计量空燃比。当不平衡确定参数大于不平衡确定阈值时，确定装置确定已经发生了缸间空燃比不平衡状态。

49. 发明申请

US20120174900A1 APPARATUS AND METHOD FOR DETECTING VARIATION ABNORMALITY IN AIR-FUEL RATIO BETWEEN CYLINDERS 审中-公开
标题翻译：用于检测气瓶之间的空气燃料比变化异常的装置和方法
公开(公告)号：US20120174900A1
公开(公告)日：2012-07-12
申请号：US13375048
申请日：2010-12-24
申请人： Hiroshi Miyamoto , Yasushi Iwazaki , Hiroshi Sawada
发明人： Hiroshi Miyamoto , Yasushi Iwazaki , Hiroshi Sawada
IPC分类号： F02D41/14 , F01N11/00
CPC分类号： F02D41/1495 , F02D41/0085 , F02D41/1441 , F02D41/1456
摘要： According to a first aspect of the present invention, there is provided an apparatus for detecting variation abnormality in an air-fuel ratio between cylinders comprising a wide-range air-fuel ratio sensor and an O2 sensor provided in an exhaust passage upstream of an exhaust gas purifying apparatus arranged in the exhaust passage for an internal combustion engine having a plurality of cylinders, air-fuel ratio controlling unit for performing air-fuel ratio control for a predetermined period in such a manner as to make an exhaust air-fuel ratio be equal to a stoichiometric air-fuel ratio based upon output from the wide-range air-fuel ratio sensor, and abnormality detecting unit for detecting variation abnormality in an air-fuel ratio between cylinders based upon output from the O2 sensor for the predetermined period when the air-fuel ratio control is performed.
摘要翻译：根据本发明的第一方面，提供了一种用于检测气缸之间的空燃比的变化异常的装置，包括宽范围空燃比传感器和设置在排气通道上游的排气通道中的O2传感器气体净化装置，配置在具有多个气缸的内燃机用排气通路内，空燃比控制单元，以使排气空燃比为规定的期间进行空燃比控制等于基于大范围空燃比传感器的输出的化学计量空燃比;以及异常检测单元，用于基于来自所述O2传感器的输出在所述预定时段内检测气缸之间的空燃比的变化异常进行空燃比控制。

50. 发明申请

US20090089011A1 Exhaust Gas Sensor Abnormality Diagnostic Device 有权
标题翻译：废气传感器异常诊断装置
公开(公告)号：US20090089011A1
公开(公告)日：2009-04-02
申请号：US12226774
申请日：2007-06-26
申请人： Yasushi Iwazaki , Hiroshi Sawada , Takahiro Joko , Masaya Kawaji
发明人： Yasushi Iwazaki , Hiroshi Sawada , Takahiro Joko , Masaya Kawaji
IPC分类号： G06F15/00
CPC分类号： G01N27/4175 , F02D41/1454 , F02D41/222
摘要： An exhaust gas sensor abnormality diagnostic device includes an exhaust gas sensor, and a judgment means that judges whether execution conditions are established for making an abnormality diagnosis of element breakage in the exhaust gas sensor. The device also includes an abnormality diagnosis means that makes the abnormality diagnosis in accordance with an output signal generated by the exhaust gas sensor. Further, when the integrated value of intake air amounts of an internal combustion engine is not smaller than a predetermined value, the judgment means judges that the execution conditions are established. The abnormality diagnosis means cancels the establishment of the execution conditions when an intake air amount of the internal combustion engine remains less than a predetermined value for a predetermined period of time.
摘要翻译：废气传感器异常诊断装置包括排气传感器，以及判断装置，其判断在废气传感器中进行元件破损的异常诊断的执行条件。该装置还包括根据由排气传感器产生的输出信号进行异常诊断的异常诊断装置。此外，当内燃机的进气量的积分值不小于预定值时，判断装置判定执行条件成立。当内燃机的进气量保持小于预定值一段预定时间时，异常诊断装置取消执行条件的建立。

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