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1. 发明申请

WO2008125952A1 AIR-FUEL RATIO CONTROL DEVICE AND AIR-FUEL RATIO CONTROL METHOD FOR INTERNAL COMBUSTION ENGINE 审中-公开
标题翻译：用于内燃机的空燃比比控制装置和空燃比控制方法
公开(公告)号：WO2008125952A1
公开(公告)日：2008-10-23
申请号：PCT/IB2008/000881
申请日：2008-04-11
申请人： TOYOTA JIDOSHA KABUSHIKI KAISHA , NAKAGAWA, Norihisa , FUJIWARA, Takahiko , HAGIMOTO, Taiga , KAKO, Junichi , KATO, Naoto , OKAZAKI, Shuntaro
发明人： NAKAGAWA, Norihisa , FUJIWARA, Takahiko , HAGIMOTO, Taiga , KAKO, Junichi , KATO, Naoto , OKAZAKI, Shuntaro
IPC分类号： F02D41/14
CPC分类号： F02D41/1455 , F02D41/1441 , F02D41/1456 , F02D41/2461
摘要： An air-fuel ratio control device includes an air-fuel ratio sensor (23) provided upstream from a three-way catalyst (20), and an oxygen sensor (24) provided downstream from the three-way catalyst. The air-fuel ratio control device controls the fuel supply amount based on the output from the air-fuel ratio sensor, and compensates for errors in the air-fuel ratio sensor by correcting the fuel supply amount based on the output from the oxygen sensor. The fuel supply correction amount is calculated based on an integral term that integrates the deviation between the output from the downstream air-fuel ratio sensor and the target air-fuel ratio. When a fuel supply adjustment control is executed, the value of the integral term in the sub-feedback control is not updated for a predetermined period after the fuel supply adjustment control ends. The actual air-fuel ratio is thus brought to the target air-fuel ratio in an appropriate manner.
摘要翻译：空燃比控制装置包括设置在三元催化剂（20）上游的空燃比传感器（23）和设置在三元催化剂下游的氧传感器（24）。空燃比控制装置基于空燃比传感器的输出来控制燃料供给量，并且通过基于氧传感器的输出校正燃料供给量来补偿空燃比传感器的误差。基于将来自下游空燃比传感器的输出与目标空燃比的偏差进行积分的积分项来计算燃料供给修正量。当执行燃料供给调节控制时，在燃料供给调节控制结束之后的预定时间段内，子反馈控制中的积分项的值不被更新。因此，实际的空燃比以适当的方式达到目标空燃比。

2. 发明申请

WO2008029256A3 AIR-FUEL RATIO CONTROL APPARATUS AND AIR-FUEL RATIO CONTROL METHOD FOR INTERNAL COMBUSTION ENGINE 审中-公开
公开(公告)号：WO2008029256A3
公开(公告)日：2008-03-13
申请号：PCT/IB2007/002558
申请日：2007-09-05
申请人： TOYOTA JIDOSHA KABUSHIKI KAISHA , FUJIWARA, Takahiko , NAKAGAWA, Norihisa , KATO, Naoto , OKAZAKI, Shuntaro , IDE, Koji
发明人： FUJIWARA, Takahiko , NAKAGAWA, Norihisa , KATO, Naoto , OKAZAKI, Shuntaro , IDE, Koji
IPC分类号： F02D41/02
摘要： A fuel injection amount is controlled so that the air-fiiel ratio of exhaust gas flowing into a catalyst (6) oscillates around a stoichiometric air-fuel ratio. When it is estimated that the level of oxygen storage capacity of the catalyst (6) is lower than a predetermined reference capacity, the amplitude of the air-fuel ratio of the exhaust gas which oscillates around the stoichiometric air-fuel ratio is reduced by controlling the fuel injection amount. The level of the oxygen storage capacity of the catalyst (6) is estimated based on the amplitude of the output signal from an oxygen sensor (14) disposed downstream of the catalyst (6).

3. 发明申请

WO2007122492A3 AIR-FUEL RATIO CONTROL SYSTEM FOR INTERNAL COMBUSTION ENGINE AND CONTROL METHOD OF THE SAME 审中-公开
公开(公告)号：WO2007122492A3
公开(公告)日：2007-11-01
申请号：PCT/IB2007/001048
申请日：2007-04-23
申请人： TOYOTA JIDOSHA KABUSHIKI KAISHA , ISHII, Ryo , NAKAGAWA, Norihisa
发明人： ISHII, Ryo , NAKAGAWA, Norihisa
IPC分类号： F02D41/06 , F02D41/14
摘要： An air-fuel ratio control system includes an air-fuel ratio sensor (23, 24) disposed upstream or downstream of an exhaust purification catalyst, and performs feedback control of the fuel supply amount such that an output value of the air-fuel ratio sensor is controlled to the target air-fuel ratio. The feedback control is performed by calculating a correction amount by summing up the value of a proportional and the value of an integral calculated based on the deviation between the output value of the air-fuel ratio sensor and the target air-fuel ratio, and correcting the fuel supply amount based on the obtained correction amount. At cold startup of the internal combustion engine, the value of the integral is set to be a smaller value from the startup of the internal combustion engine until a predetermined period elapses.

4. 发明申请

WO2009106940A1 INTERNAL COMBUSTION ENGINE AIR-FUEL RATIO CONTROL APPARATUS AND METHOD 审中-公开
标题翻译：内燃机空燃比控制装置及方法
公开(公告)号：WO2009106940A1
公开(公告)日：2009-09-03
申请号：PCT/IB2009/000128
申请日：2009-01-27
申请人： TOYOTA JIDOSHA KABUSHIKI KAISHA , MIZOGUCHI, Hiroaki , NAKAGAWA, Norihisa
发明人： MIZOGUCHI, Hiroaki , NAKAGAWA, Norihisa
IPC分类号： F02D41/02 , F02D41/10 , F02D41/14 , F02D41/24
CPC分类号： F02D41/0295 , F01N11/007 , F02D41/10 , F02D41/1441 , F02D41/1454 , F02D41/1456 , F02D41/2454 , F02D2041/1409 , F02D2200/0814 , F02D2200/0816 , Y02T10/47
摘要： Internal combustion engine air-fuel ratio control apparatus and method are provided in which the target air-fuel ratio of exhaust gas flowing into an exhaust-gas purification catalyst unit (3) is controlled through at least proportional-integral control such that the correction amount per unit time of the oxygen amount in said catalyst unit (3) is maintained constant. When the intake air amount is smaller than a predetermined amount and the air-fuel ratio detected by an oxygen sensor (5) provided downstream of the catalyst unit (3) is rich, said target air-fuel ratio is controlled to suppress an increase in the air-fuel ratio in the exhaust-gas purification catalyst unit (3). Accordingly, even if rapid acceleration operation is performed in a state where the intake air amount is extremely small and the air-fuel ratio detected by the oxygen sensor (5) is rich, NOx in exhaust gas can be sufficiently removed through reduction reactions at the exhaust-gas purification catalyst unit (3).
摘要翻译：提供内燃机空燃比控制装置和方法，其中通过至少比例积分控制来控制流入排气净化催化剂单元（3）的废气的目标空燃比，使得校正量在所述催化剂单元（3）中每单位时间的氧气量保持恒定。当进气量小于预定量并且由设置在催化单元（3）下游的氧传感器（5）检测到的空燃比变浓时，控制目标空燃比以抑制废气净化催化剂单元（3）中的空燃比。因此，即使在进气量极小并且由氧传感器（5）检测到的空燃比变多的状态下进行快速加速操作，也可以通过在氧传感器5的还原反应充分地除去废气中的NOx 排气净化催化剂单元（3）。

5. 发明申请

WO2005054651A1 AIR-FUEL RATIO CONTROL APPARATUS OF INTERNAL COMBUSTION ENGINE 审中-公开
标题翻译：内燃机空燃比控制装置
公开(公告)号：WO2005054651A1
公开(公告)日：2005-06-16
申请号：PCT/JP2004/018081
申请日：2004-11-29
申请人： TOYOTA JIDOSHA KABUSHIKI KAISHA , NAKAGAWA, Norihisa , AKIYOSHI, Asuka
发明人： NAKAGAWA, Norihisa , AKIYOSHI, Asuka
IPC分类号： F02D41/02
CPC分类号： F01N3/101 , F01N3/20 , F01N13/009 , F01N13/0093 , F02D41/0295 , F02D41/1441 , F02D41/1443 , F02D41/1446 , F02D41/1475 , F02D41/2448 , F02D41/2454 , F02D2200/0804 , F02D2200/0814 , Y02T10/22
摘要： An air-fuel ratio control apparatus of an internal combustion engine includes first and second catalysts 10 and 12, first air-fuel ratio acquiring means 8 provided upstream of the first catalyst, for acquiring an air-fuel ratio of exhaust gas; second air-fuel ratio acquiring means 11 for acquiring an air-fuel ratio of the exhaust gas flowing into the second catalyst, and air-fuel ratio controlling means 13 for controlling an air-fuel ratio according to the air-fuel ratios acquired by the first and second air-fuel ratio acquiring means, and the air-fuel ratio controlling means is provided with lean control means 13 for controlling an air-fuel ratio until the second catalyst becomes lean after completion of a fuel quantity increasing operation of the engine, and intermediate lean control means 13 for performing control to change the air-fuel ratio to a lean air-fuel ratio within the range enough to make the first catalyst lean and not enough to make the second catalyst lean, between the fuel quantity increasing operation and the air-fuel ratio control by the lean control means.
摘要翻译：内燃机的空燃比控制装置具有第一和第二催化剂10,12，设置在第一催化剂上游的第一空燃比获取单元8，用于获取废气的空燃比; 用于获取流入第二催化剂的排气的空燃比的第二空燃比获取单元11，以及空燃比控制单元13，其根据由上述空气燃料比获取的空燃比控制空燃比第一和第二空燃比获取装置，并且空燃比控制装置设置有稀薄控制装置13，用于在完成发动机的燃料增加操作之后控制空燃比直到第二催化剂变稀，和中间稀薄控制装置13，用于进行控制，以使空燃比在足够的范围内使空燃比使第一催化剂变稀，并且不足以使第二催化剂在燃料增加操作和由稀薄控制装置控制空燃比。

6. 发明申请

WO2015194190A1 CONTROL SYSTEM OF INTERNAL COMBUSTION ENGINE 审中-公开
标题翻译：内燃机控制系统
公开(公告)号：WO2015194190A1
公开(公告)日：2015-12-23
申请号：PCT/JP2015/003090
申请日：2015-06-19
申请人： TOYOTA JIDOSHA KABUSHIKI KAISHA
发明人： OKAZAKI, Shuntaro , NAKAGAWA, Norihisa , YAMAGUCHI, Yuji
IPC分类号： F02D41/02 , F02D41/14 , F02D41/24
CPC分类号： F02D41/2454 , F02D41/0295 , F02D41/1441 , F02D41/1454 , F02D2200/0814
摘要： An internal combustion engine comprises an exhaust purification catalyst 20 and a downstream side air-fuel ratio sensor which is arranged at the downstream side of the exhaust purification catalyst. The control system performs feedback control so that the air-fuel ratio of the exhaust gas becomes the target air-fuel ratio, and performs learning control to correct the control center air-fuel ratio based on the output air-fuel ratio of the downstream side sensor. The target air-fuel ratio is switched to the lean air-fuel ratio when the output air-fuel ratio of the downstream side sensor becomes the rich judged air-fuel ratio and is switched to the rich air-fuel ratio when the output air-fuel ratio becomes the lean judged air-fuel ratio. When the learning promoting condition stands, the lean degree of the average target air-fuel ratio while the target air-fuel ratio is set to the lean air-fuel ratio and the rich degree of the average target air-fuel ratio while the target air-fuel ratio is set to the rich air-fuel ratio are increased.
摘要翻译：内燃机包括排气净化催化剂20和布置在排气净化催化剂的下游侧的下游侧空燃比传感器。控制系统进行反馈控制，使排气的空燃比成为目标空燃比，进行基于下游侧的输出空燃比校正控制中心空燃比的学习控制传感器。当下游侧传感器的输出空燃比成为判断空燃比时，将目标空燃比切换为稀空燃比，并且当输出空气 - 燃料比变为浓空燃比时，燃料比变为精确判断的空燃比。当学习促进条件成立时，将目标空燃比的目标空燃比的稀薄度设定为稀空燃比和平均目标空燃比的浓度，而目标空气 - 燃油比设定为浓空燃比增加。

7. 发明申请

WO2015177996A1 CONTROL SYSTEM OF INTERNAL COMBUSTION ENGINE 审中-公开
标题翻译：内燃机控制系统
公开(公告)号：WO2015177996A1
公开(公告)日：2015-11-26
申请号：PCT/JP2015/002467
申请日：2015-05-15
申请人： TOYOTA JIDOSHA KABUSHIKI KAISHA
发明人： NAKAGAWA, Norihisa , OKAZAKI, Shuntaro , YAMAGUCHI, Yuji
IPC分类号： F02D41/02 , F02D41/14
CPC分类号： F02D41/0295 , F02D35/0046 , F02D41/1441 , F02D41/1475 , F02D2200/0814
摘要： An internal combustion engine comprises an exhaust purification catalyst 20. A control system of the engine comprises a downstream side air-fuel ratio sensor 41 at a downstream side of the exhaust purification catalyst, and an air-fuel ratio control device which controls the air-fuel ratio of the exhaust gas. The target air-fuel ratio is set to a lean air-fuel ratio when an output air-fuel ratio of the sensor becomes a rich judged air-fuel ratio or less and is set to a rich air-fuel ratio when an output air-fuel ratio becomes a lean judged air-fuel ratio or more. When the engine operating state is a steady operation state and is a low load operation state, at least one of an average lean degree of the target air-fuel ratio while the target air-fuel ratio is set to a lean air-fuel ratio and an average rich degree of the target air-fuel ratio while the target air-fuel ratio is set to a rich air-fuel ratio is increased.
摘要翻译：内燃机包括排气净化催化剂20.发动机的控制系统包括在排气净化催化剂的下游侧的下游侧空燃比传感器41和控制空气 - 燃料比控制装置的空燃比控制装置，排气的燃料比。当传感器的输出空燃比变为判定空燃比的浓度以下时，将目标空燃比设定为稀空燃比，并且当输出空气 - 燃料比为空燃比时，燃料比变为精确判断的空燃比以上。当发动机运转状态为稳定运转状态且为低负荷运转状态时，将目标空燃比的目标空燃比的平均稀度设定为稀空燃比，将目标空燃比设定为浓空燃比的目标空燃比的平均浓度越高。

8. 发明申请

WO2015105013A1 Control System of Internal Combustion Engine 审中-公开
标题翻译：内燃机控制系统
公开(公告)号：WO2015105013A1
公开(公告)日：2015-07-16
申请号：PCT/JP2014/084444
申请日：2014-12-18
申请人： TOYOTA JIDOSHA KABUSHIKI KAISHA
发明人： YAMAGUCHI, Yuji , NAKAGAWA, Norihisa , OKAZAKI, Shuntaro , MIYOSHI, Yuji
IPC分类号： F02D41/02 , F02D41/14
CPC分类号： F01N3/20 , F01N2570/14 , F02D35/0015 , F02D41/025 , F02D41/0295 , F02D41/1475 , F02D2200/0802 , F02D2200/0816
摘要： An internal combustion engine comprises an exhaust purification catalyst 20. The control system comprises a temperature detecting means 46 for detecting or estimating a temperature of the exhaust purification catalyst, performs feedback control so that an air-fuel ratio of exhaust gas flowing into the exhaust purification catalyst becomes a target air-fuel ratio, and performs target air-fuel ratio setting control which alternately sets the target air-fuel ratio to a rich set air-fuel ratio and a lean set air-fuel ratio. In addition, the control system increases a variation difference, obtained by subtracting a rich degree of the rich set air-fuel ratio from a lean degree of a lean set air-fuel ratio, when a temperature of the exhaust purification catalyst detected or estimated by the temperature detecting means is a predetermined upper limit temperature or less compared with when it is higher than the upper limit temperature. As a result, a sulfur ingredient storage amount of an exhaust purification catalyst is maintained low.
摘要翻译：内燃机包括排气净化催化剂20.控制系统包括用于检测或估计排气净化催化剂的温度的温度检测装置46，执行反馈控制，使得流入排气净化的排气的空燃比催化剂成为目标空燃比，并且执行将目标空燃比交替地设定为浓设定空燃比和稀空燃比的目标空燃比设定控制。此外，控制系统通过从稀薄空燃比的贫乏度减去浓空燃比的浓度而获得的变化差异，当通过以下方式检测或估计的排气净化催化剂的温度温度检测装置与高于上限温度的情况相比是预定的上限温度以下。结果，排气净化催化剂的硫成分保存量保持较低。

9. 发明申请

WO2015162925A1 CONTROL DEVICE OF INTERNAL COMBUSTION ENGINE 审中-公开
标题翻译：内燃机控制装置
公开(公告)号：WO2015162925A1
公开(公告)日：2015-10-29
申请号：PCT/JP2015/002197
申请日：2015-04-22
申请人： TOYOTA JIDOSHA KABUSHIKI KAISHA
发明人： NAKAGAWA, Norihisa , OKAZAKI, Shuntaro , YAMAGUCHI, Yuji
IPC分类号： F02D41/02 , F02D41/12
CPC分类号： F02D41/1454 , F01N3/0864 , F01N3/101 , F01N9/00 , F01N11/007 , F01N13/0093 , F01N2570/00 , F01N2570/16 , F01N2900/1402 , F01N2900/1624 , F02D41/0295 , F02D41/123 , F02D41/3005 , F02D2200/0814 , F02D2200/0816 , Y02T10/22 , Y02T10/47
摘要： An internal combustion engine comprises an upstream side exhaust purification catalyst (20) and a downstream side exhaust purification catalyst (24). The control device comprises a storage amount estimating means which estimates the oxygen storage amount (OSAulc) of the downstream side exhaust purification catalyst, and can execute fuel cut control which cuts the feed of fuel to the combustion chamber during operation of the internal combustion engine when the engine speed NE is the lowest reference speed NElow or more. The control device lowers the lowest reference speed when the storage amount estimated by the storage amount estimating means has become a given limit storage amount Clim or less, compared with when it is larger than the limit storage amount. As a result, a control device can effectively keep the oxygen storage amount of the downstream side exhaust purification catalyst from decreasing to zero.
摘要翻译：内燃机包括上游侧排气净化催化剂（20）和下游侧排气净化催化剂（24）。控制装置包括：储存量估计装置，其估计下游侧排气净化催化剂的氧气储存量（OSAulc），并且可以执行燃料切断控制，该控制在内燃机的运行期间切断向燃烧室的供给，发动机转速NE是最低参考速度NElow以上。当存储量估计装置估计的存储量已经变成一个给定的极限存储量Clim或更小时，与当它大于限制存储量时相比，控制装置降低最低参考速度。结果，控制装置可以有效地将下游侧排气净化催化剂的氧气储存量降低到零。

10. 发明申请

WO2015105012A1 Control System of Internal Combustion Engine 审中-公开
标题翻译：内燃机控制系统
公开(公告)号：WO2015105012A1
公开(公告)日：2015-07-16
申请号：PCT/JP2014/084443
申请日：2014-12-18
申请人： TOYOTA JIDOSHA KABUSHIKI KAISHA
发明人： NAKAGAWA, Norihisa , OKAZAKI, Shuntaro , YAMAGUCHI, Yuji
IPC分类号： F02D41/02 , F02D41/14
CPC分类号： F02D41/0295 , F01N3/0864 , F01N3/20 , F01N2900/1402 , F02D41/1441 , F02D41/1454 , F02D41/1475 , F02D41/3005 , F02D2200/0814
摘要： A control system of an internal combustion engine which can suppress a drop in the purification performance of an exhaust purification catalyst is provided. The control system of an internal combustion engine is provided with an exhaust purification catalyst 20 and downstream side air-fuel ratio sensor 41, performs feedback control so that an air-fuel ratio of the exhaust gas which flows into the exhaust purification catalyst becomes a target air-fuel ratio, and performs target air-fuel ratio setting control which alternately switches the target air-fuel ratio to a lean set air-fuel ratio which is leaner than a stoichiometric air-fuel ratio and a rich set air-fuel ratio which is richer than the stoichiometric air-fuel ratio. In the control system, when an engine operating state is a steady operating state, compared with when it is not a steady operating state, at least one of a rich degree of the rich set air-fuel ratio or a lean degree of the lean set air-fuel ratio is made to increase.
摘要翻译：提供了能够抑制排气净化催化剂的净化性能下降的内燃机的控制系统。内燃机的控制系统设有排气净化催化剂20和下游侧空燃比传感器41，进行反馈控制，使流入排气净化催化剂的排气的空燃比成为目标空燃比，并且执行目标空燃比设定控制，其将目标空燃比交替地切换到比理论空燃比和浓设定空燃比更浓的稀空燃比比化学计量空燃比更丰富。在控制系统中，当发动机运转状态为稳定运行状态时，与不稳定运转状态相比，富集设定空燃比的浓度或精密集中的稀薄度空燃比增加。

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