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公开(公告)号：US08613219B2
公开(公告)日：2013-12-24
申请号：US13642820
申请日：2010-04-23
申请人： Koichi Kitaura , Takahiko Fujiwara , Yuuji Miyoshi , Ryota Onoe
发明人： Koichi Kitaura , Takahiko Fujiwara , Yuuji Miyoshi , Ryota Onoe
IPC分类号： G01M15/10
CPC分类号： F02D41/1441 , F01N3/101 , F01N11/007 , F01N2560/025 , F01N2560/14 , F01N2900/0416 , F01N2900/1402 , F01N2900/1624 , F02D41/1475 , Y02T10/22 , Y02T10/47
摘要： Active air-fuel ratio control is performed to alternately control an air-fuel ratio in an area located upstream of a catalyst between a lean side and a rich side. Switching is carried out between lean control and rich control at the same time when an output from a post-catalyst sensor reaches a threshold. Whether the catalyst is normal or abnormal is determined based on the rate of a change in the output from the post-catalyst sensor between a first point of time when a pre-catalyst air-fuel ratio reaches stoichiometry after the output from the post-catalyst sensor reaches the threshold and a second point of time when the output from the post-catalyst sensor reaches the threshold next time.
摘要翻译： 执行主动空燃比控制以交替地控制位于贫侧和富侧之间的催化剂上游的区域中的空燃比。 在后催化剂传感器的输出达到阈值的同时，在稀薄控制和浓控制之间进行切换。 基于催化剂后传感器的输出的变化率，在催化剂后催化剂的输出后催化剂前空燃比达到化学计量的第一时间点之后，确定催化剂是正常还是异常 传感器达到阈值，而后催化剂传感器的输出下一次达到阈值的第二时间点。
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公开(公告)号：US20130036808A1
公开(公告)日：2013-02-14
申请号：US13642820
申请日：2010-04-23
申请人： Koichi Kitaura , Takahiko Fujiwara , Yuuji Miyoshi , Ryota Onoe
发明人： Koichi Kitaura , Takahiko Fujiwara , Yuuji Miyoshi , Ryota Onoe
IPC分类号： G01M15/10
CPC分类号： F02D41/1441 , F01N3/101 , F01N11/007 , F01N2560/025 , F01N2560/14 , F01N2900/0416 , F01N2900/1402 , F01N2900/1624 , F02D41/1475 , Y02T10/22 , Y02T10/47
摘要： Active air-fuel ratio control is performed to alternately control an air-fuel ratio in an area located upstream of a catalyst between a lean side and a rich side. Switching is carried out between lean control and rich control at the same time when an output from a post-catalyst sensor reaches a threshold. Whether the catalyst is normal or abnormal is determined based on the rate of a change in the output from the post-catalyst sensor between a first point of time when a pre-catalyst air-fuel ratio reaches stoichiometry after the output from the post-catalyst sensor reaches the threshold and a second point of time when the output from the post-catalyst sensor reaches the threshold next time.
摘要翻译： 执行主动空燃比控制以交替地控制位于贫侧和富侧之间的催化剂上游的区域中的空燃比。 在后催化剂传感器的输出达到阈值的同时，在稀薄控制和浓控制之间进行切换。 基于催化剂后传感器的输出的变化率，在催化剂后催化剂的输出后催化剂前空燃比达到化学计量的第一时间点之后，确定催化剂是正常还是异常 传感器达到阈值，而后催化剂传感器的输出下一次达到阈值的第二时间点。
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公开(公告)号：US09062622B2
公开(公告)日：2015-06-23
申请号：US13821795
申请日：2010-09-09
CPC分类号： F02D41/0235 , F02D41/1441 , F02D41/1454 , F02D41/1475 , F02D41/2441 , F02D41/2454
摘要： An air-fuel ratio control apparatus of the present invention comprises an inverse direction spike introducing section and an inverse direction spike interval setting section. The inverse direction spike introducing section introduces, while an air-fuel ratio correction required by an output of a downstream air-fuel ratio sensor is being carried out, an inverse direction spike which is an air-fuel ratio spike to temporarily change an air-fuel ratio of an exhaust gas toward a direction opposite to a direction of the air-fuel ratio correction with respect to a target control air-fuel ratio. The inverse direction spike interval setting section sets, based on an operating state of an internal combustion engine system, an inverse direction spike interval which is an interval between two of the inverse direction spikes next to each other in time.
摘要翻译： 本发明的空燃比控制装置包括反方向尖峰引入部和逆方向尖峰间隔设定部。 逆向尖峰引入部引入在进行下游空燃比传感器的输出所要求的空燃比校正的同时进行作为空燃比尖峰的反方向尖峰， 相对于目标控制空燃比，排气朝与空燃比校正方向相反的方向的燃料比。 逆方向尖峰间隔设定部基于内燃机系统的运转状态，设定作为时间上相邻的两个逆方向前后的间隔的反方向时间间隔。
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公开(公告)号：US08899019B2
公开(公告)日：2014-12-02
申请号：US13823398
申请日：2010-09-15
申请人： Ryota Onoe , Junichi Suzuki , Takahiko Fujiwara , Makoto Tomimatsu , Koichi Kimura , Shuntaro Okazaki
发明人： Ryota Onoe , Junichi Suzuki , Takahiko Fujiwara , Makoto Tomimatsu , Koichi Kimura , Shuntaro Okazaki
CPC分类号： F02D41/0235 , F02D41/045 , F02D41/1401 , F02D41/1441 , F02D41/1454 , F02D41/1456
摘要： An air-fuel ratio control apparatus of the present invention includes a determination section and a reverse direction correction introducing section. The determination section determines whether or not an output of the downstream air-fuel ratio sensor falls within a predetermined range whose center corresponds to a target value corresponding to the stoichiometric air-fuel ratio. When the output of the downstream air-fuel ratio sensor falls within the predetermined range, the reverse direction correction introducing section temporarily introduces, to an air-fuel ratio correction in a direction requested by the output, an air-fuel ratio correction in a direction opposite to the requested direction.
摘要翻译： 本发明的空燃比控制装置具有确定部和逆方向校正导入部。 确定部分确定下游空燃比传感器的输出是否落在其中心对应于与化学计量空燃比对应的目标值的预定范围内。 当下游空燃比传感器的输出落在预定范围内时，反方向校正引入部临时引入在输出要求的方向上的空燃比校正方向上的空燃比校正 与要求方向相反。
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公开(公告)号：US09261032B2
公开(公告)日：2016-02-16
申请号：US13980467
申请日：2011-01-18
CPC分类号： F02D41/00 , F01N3/101 , F01N3/105 , F02D41/0295 , F02D41/126 , F02D41/1439 , F02D41/1441 , F02D41/1454 , F02D41/1456 , F02D2200/0814 , Y02T10/22
摘要： An air-fuel ratio control apparatus for an internal combustion engine of the present invention determines whether or not a lean request has occurred, based on a comparison between a value correlating with an output value of the downstream air-fuel ratio sensor disposed downstream of the catalyst (downstream air-fuel ratio sensor output correlating value) and a predetermined lean request determining value, and determines whether or not a rich request has occurred, based on a comparison between the downstream air-fuel ratio sensor output correlating value and a predetermined rich request determining value. Further, the air-fuel ratio control apparatus calculates a total amount of oxygen (released oxygen amount) released from the catalyst in the rich request occurring period, and calculates an integrated value (present stored oxygen amount) of oxygen stored in the catalyst after a start of the lean request occurring period which follows the rich request occurring period. The apparatus changes the rich request determining value in such a manner that a point in time at which it is determined that the rich request has occurred comes much earlier as the present stored oxygen amount comes closer to the released oxygen amount.
摘要翻译： 本发明的用于内燃机的空燃比控制装置基于与下游空燃比传感器的输出值相关联的值的比较来确定是否发生了精益请求， 催化剂（下游空燃比传感器输出相关值）和预定的稀薄要求确定值，并且基于下游空燃比传感器输出相关值和预定浓度之间的比较来确定是否发生了丰富请求 请求确定值。 此外，空燃比控制装置计算在富请求发生期间从催化剂释放的氧的总量（释放氧量），并计算在催化剂中存储的氧的积分值（存储的氧量） 紧随需求发生期的精益发送期的开始。 该装置以这样一种方式改变富请求确定值，使得确定富请求已经发生的时间点早于当前存储的氧量接近释放的氧量。
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公开(公告)号：US20130338904A1
公开(公告)日：2013-12-19
申请号：US13980467
申请日：2011-01-18
IPC分类号： F02D41/00
CPC分类号： F02D41/00 , F01N3/101 , F01N3/105 , F02D41/0295 , F02D41/126 , F02D41/1439 , F02D41/1441 , F02D41/1454 , F02D41/1456 , F02D2200/0814 , Y02T10/22
摘要： An air-fuel ratio control apparatus for an internal combustion engine of the present invention determines whether or not a lean request has occurred, based on a comparison between a value correlating with an output value of the downstream air-fuel ratio sensor disposed downstream of the catalyst (downstream air-fuel ratio sensor output correlating value) and a predetermined lean request determining value, and determines whether or not a rich request has occurred, based on a comparison between the downstream air-fuel ratio sensor output correlating value and a predetermined rich request determining value. Further, the air-fuel ratio control apparatus calculates a total amount of oxygen (released oxygen amount) released from the catalyst in the rich request occurring period, and calculates an integrated value (present stored oxygen amount) of oxygen stored in the catalyst after a start of the lean request occurring period which follows the rich request occurring period. The apparatus changes the rich request determining value in such a manner that a point in time at which it is determined that the rich request has occurred comes much earlier as the present stored oxygen amount comes closer to the released oxygen amount.
摘要翻译： 本发明的用于内燃机的空燃比控制装置基于与下游空燃比传感器的输出值相关联的值的比较来确定是否发生了精益请求， 催化剂（下游空燃比传感器输出相关值）和预定的稀薄要求确定值，并且基于下游空燃比传感器输出相关值和预定浓度之间的比较来确定是否发生了丰富请求 请求确定值。 此外，空燃比控制装置计算在富请求发生期间从催化剂释放的氧的总量（释放氧量），并计算在催化剂中存储的氧的积分值（存储的氧量） 紧随需求发生期的精益发送期的开始。 该装置以这样一种方式改变富请求确定值，使得确定富请求已经发生的时间点早于当前存储的氧量接近释放的氧量。
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公开(公告)号：US20120023913A1
公开(公告)日：2012-02-02
申请号：US13060359
申请日：2009-04-16
申请人： Mamoru Yoshioka , Takahiko Fujiwara , Ryota Onoe
发明人： Mamoru Yoshioka , Takahiko Fujiwara , Ryota Onoe
IPC分类号： F02D43/00
CPC分类号： F01N11/007 , F01N11/002 , F01N2550/02 , F01N2560/025 , Y02T10/47
摘要： The air-fuel ratio of exhaust gas supplied to a catalyst is alternately and actively switched between a rich state value and a lean state value. In conjunction with the performance of this active air-fuel ratio control, the oxygen storage capacity of the catalyst is measured. Whether the catalyst is normal or abnormal is determined by comparing the measured value of the oxygen storage capacity with a predetermined determination value. The temperature of the catalyst is acquired, and the determination value is set based on the acquired catalyst temperature. The determination value is set so as to decreases with increasing catalyst temperature when the catalyst temperature is equal to or higher than a predetermined temperature.
摘要翻译： 供给到催化剂的废气的空燃比在富状态值和稀态值之间交替地主动地切换。 结合该主动空燃比控制的性能，测量催化剂的储氧能力。 通过将储氧容量的测量值与预定的确定值进行比较来确定催化剂是正常还是异常。 获得催化剂的温度，并且基于获得的催化剂温度来设定测定值。 当催化剂温度等于或高于预定温度时，确定值被设定为随着催化剂温度的升高而降低。
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公开(公告)号：US09790873B2
公开(公告)日：2017-10-17
申请号：US13700248
申请日：2010-05-28
申请人： Makoto Tomimatsu , Ryota Onoe , Takahiko Fujiwara
发明人： Makoto Tomimatsu , Ryota Onoe , Takahiko Fujiwara
CPC分类号： F02D41/00 , F02D41/1441 , F02D41/1456 , F02D41/1479 , F02D41/1482 , F02D41/1483 , F02D41/2454 , F02D41/30
摘要： An air-fuel ratio control controls an air-fuel ratio (air-fuel ratio of an engine) of a mixture supplied to the engine, based on an output value of the downstream-side air-fuel ratio sensor disposed downstream of a catalyst. That is, the air-fuel ratio control apparatus sets the air-fuel ratio of the engine at a rich air-fuel ratio when the output Voxs is smaller than a reference value VREF (when a rich request is occurring). The air-fuel ratio control apparatus sets the air-fuel ratio of the engine at a lean air-fuel ratio when the output Voxs is larger than a reference value VREF (when a lean request is occurring). The air-fuel ratio control apparatus makes the target value VREF gradually come closer to a reference value VF (stoichiometric air-fuel ratio corresponding value) from a certain value, when the output value Voxs deviates greatly from the reference value Vf (points P1-P3).
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公开(公告)号：US20130231845A1
公开(公告)日：2013-09-05
申请号：US13821795
申请日：2010-09-09
IPC分类号： F02D41/02
CPC分类号： F02D41/0235 , F02D41/1441 , F02D41/1454 , F02D41/1475 , F02D41/2441 , F02D41/2454
摘要： An air-fuel ratio control apparatus of the present invention comprises an inverse direction spike introducing section and an inverse direction spike interval setting section. The inverse direction spike introducing section introduces, while an air-fuel ratio correction required by an output of a downstream air-fuel ratio sensor is being carried out, an inverse direction spike which is an air-fuel ratio spike to temporarily change an air-fuel ratio of an exhaust gas toward a direction opposite to a direction of the air-fuel ratio correction with respect to a target control air-fuel ratio. The inverse direction spike interval setting section sets, based on an operating state of an internal combustion engine system, an inverse direction spike interval which is an interval between two of the inverse direction spikes next to each other in time.
摘要翻译： 本发明的空燃比控制装置包括反方向尖峰引入部和逆方向尖峰间隔设定部。 逆向尖峰引入部引入在进行下游空燃比传感器的输出所要求的空燃比校正的同时进行作为空燃比尖峰的反方向尖峰， 相对于目标控制空燃比，排气朝与空燃比校正方向相反的方向的燃料比。 逆方向尖峰间隔设定部基于内燃机系统的运转状态，设定作为时间上相邻的两个逆方向前后的间隔的反方向时间间隔。
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公开(公告)号：US20130269324A1
公开(公告)日：2013-10-17
申请号：US13823398
申请日：2010-09-15
申请人： Ryota Onoe , Junichi Suzuki , Takahiko Fujiwara , Makoto Tomimatsu , Koichi Kimura , Shuntaro Okazaki
发明人： Ryota Onoe , Junichi Suzuki , Takahiko Fujiwara , Makoto Tomimatsu , Koichi Kimura , Shuntaro Okazaki
IPC分类号： F02D41/02
CPC分类号： F02D41/0235 , F02D41/045 , F02D41/1401 , F02D41/1441 , F02D41/1454 , F02D41/1456
摘要： An air-fuel ratio control apparatus of the present invention includes a determination section and a reverse direction correction introducing section. The determination section determines whether or not an output of the downstream air-fuel ratio sensor falls within a predetermined range whose center corresponds to a target value corresponding to the stoichiometric air-fuel ratio. When the output of the downstream air-fuel ratio sensor falls within the predetermined range, the reverse direction correction introducing section temporarily introduces, to an air-fuel ratio correction in a direction requested by the output, an air-fuel ratio correction in a direction opposite to the requested direction.
摘要翻译： 本发明的空燃比控制装置具有确定部和逆方向校正导入部。 确定部分确定下游空燃比传感器的输出是否落在其中心对应于与化学计量空燃比对应的目标值的预定范围内。 当下游空燃比传感器的输出落在预定范围内时，反方向校正引入部临时引入在输出要求的方向上的空燃比校正方向上的空燃比校正 与要求方向相反。
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