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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：US20130179051A1
公开(公告)日：2013-07-11
申请号：US13825705
申请日：2010-09-24
IPC分类号： F02D41/02
CPC分类号： F02D41/0235 , F01N13/008 , F01N13/0093 , F01N2560/025 , F02D17/02 , F02D41/0085 , F02D41/1441 , F02D41/1454 , F02D41/1458 , F02D41/1463 , F02D41/2454 , Y02T10/22
摘要： An embodiment (control apparatus) of an air-fuel ratio control apparatus according to the present invention determines, based on an output value Voxs of a downstream air-fuel ratio sensor 56 disposed at a position downstream of a three-way catalyst 43, which air-fuel request is occurring, a rich request or a lean request. The control apparatus sets an air-fuel ratio of each cylinder (cylinder-by-cylinder air-fuel ratio) to a rich air-fuel ratio when the rich request is occurring, and sets the cylinder-by-cylinder air-fuel ratio to a lean air-fuel ratio when the lean request is occurring. The control apparatus has a cylinder-by-cylinder air-fuel ratio of a specific cylinder different from a cylinder-by-cylinder air-fuel ratio of the other cylinder so as to obtain a fluctuation period correlated value indicative of a fluctuation of the output value Voxs of the downstream air-fuel ratio sensor 56, and determines an influence/impact degree on the output value of the downstream air-fuel ratio sensor of an exhaust gas discharged from each of a plurality of cylinders, based on the fluctuation period correlated value. Further, the control apparatus controls the air-fuel ratio of each cylinder in accordance with the influence degree.
摘要翻译： 根据本发明的空燃比控制装置的一个实施例（控制装置）基于设置在三元催化剂43下游的下游空燃比传感器56的输出值Voxs， 空气燃料请求正在发生，丰富的请求或精益请求。 控制装置在发生丰满请求时将各气缸的空燃比（气缸/空气比）逐个设定为浓空燃比，并且将逐缸空燃比设定为 在发生精益请求时的贫空燃比。 所述控制装置具有与所述另一个气缸的与所述气缸的空燃比不同的特定气缸的逐缸空燃比，以获得表示所述输出的波动的波动周期相关值 下游空燃比传感器56的Vox值，并且基于波动周期相关地确定对从多个气缸中的每一个排出的排气的下游空燃比传感器的输出值的影响/冲击程度 值。 此外，控制装置根据影响程度来控制各气缸的空燃比。
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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：US09188072B2
公开(公告)日：2015-11-17
申请号：US13825705
申请日：2010-09-24
CPC分类号： F02D41/0235 , F01N13/008 , F01N13/0093 , F01N2560/025 , F02D17/02 , F02D41/0085 , F02D41/1441 , F02D41/1454 , F02D41/1458 , F02D41/1463 , F02D41/2454 , Y02T10/22
摘要： An embodiment (control apparatus) of an air-fuel ratio control apparatus according to the present invention determines, based on an output value Voxs of a downstream air-fuel ratio sensor 56 disposed at a position downstream of a three-way catalyst 43, which air-fuel request is occurring, a rich request or a lean request. The control apparatus sets an air-fuel ratio of each cylinder (cylinder-by-cylinder air-fuel ratio) to a rich air-fuel ratio when the rich request is occurring, and sets the cylinder-by-cylinder air-fuel ratio to a lean air-fuel ratio when the lean request is occurring. The control apparatus has a cylinder-by-cylinder air-fuel ratio of a specific cylinder different from a cylinder-by-cylinder air-fuel ratio of the other cylinder so as to obtain a fluctuation period correlated value indicative of a fluctuation of the output value Voxs of the downstream air-fuel ratio sensor 56, and determines an influence/impact degree on the output value of the downstream air-fuel ratio sensor of an exhaust gas discharged from each of a plurality of cylinders, based on the fluctuation period correlated value. Further, the control apparatus controls the air-fuel ratio of each cylinder in accordance with the influence degree.
摘要翻译： 根据本发明的空燃比控制装置的一个实施例（控制装置）基于设置在三元催化剂43下游的下游空燃比传感器56的输出值Voxs， 空气燃料请求正在发生，丰富的请求或精益请求。 控制装置在发生丰满请求时将各气缸的空燃比（气缸/空气比）逐个设定为浓空燃比，并且将逐缸空燃比设定为 在发生精益请求时的贫空燃比。 所述控制装置具有与所述另一个气缸的与所述气缸的空燃比不同的特定气缸的逐缸空燃比，以获得表示所述输出的波动的波动周期相关值 下游空燃比传感器56的Vox值，并且基于波动周期相关地确定对从多个气缸中的每一个排出的排气的下游空燃比传感器的输出值的影响/冲击程度 值。 此外，控制装置根据影响程度来控制各气缸的空燃比。
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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：US09212583B2
公开(公告)日：2015-12-15
申请号：US14117440
申请日：2011-05-16
CPC分类号： F01N3/10 , F01N3/101 , F02D41/0295 , F02D41/10 , F02D41/1441 , F02D41/1454 , F02D41/1456 , F02D41/18 , F02D41/187 , F02D2041/1412 , F02D2200/501 , Y02A50/2324 , Y02T10/22
摘要： An air-fuel ratio control apparatus for an internal combustion engine according to an embodiment of the invention (the present control apparatus) sets a target air-fuel ratio to a target rich air-fuel ratio when it is determined on the basis of the output value Voxs of a downstream air-fuel ratio sensor 67 that the oxygen adsorption amount of a catalyst 43 tends to be excessive, and sets the target air-fuel ratio to a target lean air-fuel ratio when it is determined on the basis of the output value Voxs that the oxygen adsorption amount of the catalyst 43 tends to be insufficient. Further, the present control apparatus determines whether or not an operation state in which a large amount of nitrogen oxide flows into the catalyst 43 is reached on the basis of “whether a predetermined condition is fulfilled”, and makes the target rich air-fuel ratio obtained when the predetermined condition is fulfilled less than the target rich air-fuel ratio obtained when the predetermined condition is not fulfilled. As a result, the concentration of a reducing agent inside the catalyst 43 can be increased before a large amount of NOx flows into the catalyst 43. Therefore, when a large amount of NOx flows into the catalyst 43, most of the NOx can be eliminated.
摘要翻译： 根据本发明的实施例的内燃机的空燃比控制装置（本控制装置）在基于输出确定目标空燃比时，将目标空燃比设定为目标浓空燃比 下游空燃比传感器67的值Voxs，催化剂43的氧吸附量倾向于过大，并且当基于该催化剂43确定目标空燃比时，将目标空燃比设定为目标稀燃比 输出值Vox，催化剂43的氧吸附量趋于不足。 此外，本控制装置基于“是否满足预定条件”来确定是否达到大量氮氧化物流入催化剂43的操作状态，并且使目标浓空燃比 当预定条件满足小于当不满足预定条件时获得的目标浓空燃比时获得的。 结果，在大量的NOx流入催化剂43之前，可以增加催化剂43内的还原剂的浓度。因此，当大量的NO x流入催化剂43时，可以消除大部分的NOx 。
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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：US20140283504A1
公开(公告)日：2014-09-25
申请号：US14117440
申请日：2011-05-16
IPC分类号： F01N3/10
CPC分类号： F01N3/10 , F01N3/101 , F02D41/0295 , F02D41/10 , F02D41/1441 , F02D41/1454 , F02D41/1456 , F02D41/18 , F02D41/187 , F02D2041/1412 , F02D2200/501 , Y02A50/2324 , Y02T10/22
摘要： An air-fuel ratio control apparatus for an internal combustion engine according to an embodiment of the invention (the present control apparatus) sets a target air-fuel ratio to a target rich air-fuel ratio when it is determined on the basis of the output value Voxs of a downstream air-fuel ratio sensor 67 that the oxygen adsorption amount of a catalyst 43 tends to be excessive, and sets the target air-fuel ratio to a target lean air-fuel ratio when it is determined on the basis of the output value Voxs that the oxygen adsorption amount of the catalyst 43 tends to be insufficient. Further, the present control apparatus determines whether or not an operation state in which a large amount of nitrogen oxide flows into the catalyst 43 is reached on the basis of “whether a predetermined condition is fulfilled”, and makes the target rich air-fuel ratio obtained when the predetermined condition is fulfilled less than the target rich air-fuel ratio obtained when the predetermined condition is not fulfilled. As a result, the concentration of a reducing agent inside the catalyst 43 can be increased before a large amount of NOx flows into the catalyst 43. Therefore, when a large amount of NOx flows into the catalyst 43, most of the NOx can be eliminated.
摘要翻译： 根据本发明的实施例的内燃机的空燃比控制装置（本控制装置）在基于输出确定目标空燃比时，将目标空燃比设定为目标浓空燃比 下游空燃比传感器67的值Voxs，催化剂43的氧吸附量倾向于过大，并且当基于该催化剂43确定目标空燃比时，将目标空燃比设定为目标稀燃比 输出值Vox，催化剂43的氧吸附量趋于不足。 此外，本控制装置基于“是否满足预定条件”来确定是否达到大量氮氧化物流入催化剂43的操作状态，并且使目标浓空燃比 当预定条件满足小于当不满足预定条件时获得的目标浓空燃比时获得的。 结果，在大量的NOx流入催化剂43之前，可以增加催化剂43内的还原剂的浓度。因此，当大量的NO x流入催化剂43时，可以消除大部分的NOx 。
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