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1. 发明授权

US09732691B2 Control system of internal combustion engine 有权
公开(公告)号：US09732691B2
公开(公告)日：2017-08-15
申请号：US14762501
申请日：2013-01-29
申请人： Shuntaro Okazaki , Norihisa Nakagawa , Yuji Yamaguchi
发明人： Shuntaro Okazaki , Norihisa Nakagawa , Yuji Yamaguchi
IPC分类号： F01N3/00 , F01N3/10 , F02D41/14 , F01N3/20 , F02D41/02 , F01N13/00
CPC分类号： F02D41/1454 , F01N3/20 , F01N13/009 , F01N13/0093 , F01N2430/06 , F01N2560/025 , F01N2560/14 , F01N2900/1624 , F02D41/0295 , F02D41/1439
摘要： A control device for an internal combustion engine includes: an upstream catalyst; a downstream catalyst that is provided further downstream than the upstream catalyst in the exhaust flow direction; a downstream air-fuel ratio detection device that is provided between these catalysts; a storage amount estimation device that estimates the oxygen storage amount of the downstream catalyst; and an inflow air-fuel ratio control device that controls the air-fuel ratio of the exhaust gas flowing into the upstream catalyst such that the air-fuel ratio of the exhaust gas reaches a target air-fuel ratio.

2. 发明授权

US09593635B2 Control system of internal combustion engine 有权
标题翻译：内燃机控制系统
公开(公告)号：US09593635B2
公开(公告)日：2017-03-14
申请号：US14763653
申请日：2013-01-29
申请人： Norihisa Nakagawa , Shuntaro Okazaki , Yuji Yamaguchi
发明人： Norihisa Nakagawa , Shuntaro Okazaki , Yuji Yamaguchi
IPC分类号： F01N3/00 , F02D41/14 , F02D41/02
CPC分类号： F02D41/1475 , F02D41/0295 , F02D41/1439 , F02D41/1477
摘要： A control device for an internal combustion engine, equipped with: an exhaust purification catalyst capable of storing oxygen; a downstream-side air-fuel ratio sensor arranged downstream in the direction of flow of exhaust from the exhaust purification catalyst; and an air-fuel ratio control device that controls the air-fuel ratio such that air-fuel ratio of the exhaust flowing into the exhaust purification catalyst reaches a target air-fuel ratio. The control device changes the target air-fuel ratio to a lean air-fuel ratio setting when the exhaust air-fuel ratio detected by the downstream-side air-fuel ratio sensor reaches a rich air-fuel ratio, and then changes the target air-fuel ratio to a slightly lean air-fuel ratio setting before the exhaust air-fuel ratio detected by the downstream-side air-fuel ratio sensor reaches a lean air-fuel ratio, and then changes the target air-fuel ratio to a rich air-fuel ratio setting when the exhaust air-fuel ratio detected by the downstream-side air-fuel ratio sensor reaches a lean air-fuel ratio, and then changes the target air-fuel ratio to a slightly rich air-fuel ratio setting before the exhaust air-fuel ratio detected by the downstream-side air-fuel ratio sensor reaches a rich air-fuel ratio.
摘要翻译：一种用于内燃机的控制装置，配备有能够存储氧气的排气净化催化剂; 下游侧空燃比传感器，其布置在排气净化催化剂的排气流动方向的下游; 以及空燃比控制装置，其使流入所述排气净化催化剂的排气的空燃比达到目标空燃比来控制所述空燃比。当由下游侧空燃比传感器检测到的排气空燃比达到浓空燃比时，控制装置将目标空燃比变更为稀空燃比设定，然后将目标空气 - 燃料比与由下游侧空燃比传感器检测到的排气空燃比之前的略微偏空燃比设定达到稀空燃比，然后将目标空燃比变为浓由下游侧空燃比传感器检测到的排气空燃比达到稀空燃比时的空燃比设定，然后将目标空燃比设定为稍高的空燃比设定由下游侧空燃比传感器检测到的排气空燃比达到浓空燃比。

3. 发明申请

US20150120170A1 CONTROL APPARATUS FOR INTERNAL COMBUSTION ENGINE 有权
标题翻译：内燃机控制装置
公开(公告)号：US20150120170A1
公开(公告)日：2015-04-30
申请号：US14390234
申请日：2012-04-10
申请人： Yuji Yamaguchi , Norihisa Nakagawa , Shuntaro Okazaki
发明人： Yuji Yamaguchi , Norihisa Nakagawa , Shuntaro Okazaki
IPC分类号： F02D41/30 , F02D41/14
CPC分类号： F02D41/30 , F02D41/1401 , F02D41/1441 , F02D41/1477 , F02D2041/1422
摘要： Invention suppresses deterioration of emission if there is air-fuel ratio imbalance among cylinders. Apparatus (100) controlling an engine including first and second air-fuel ratio sensors respectively disposed on upstream and downstream of catalyst, has: first determining device determining first F/B controlled variable according to deviation between output value and target value of first air-fuel ratio sensor; second determining device determining second F/B controlled variable according to deviation between output value and target value of second air-fuel ratio sensor; controlling device controlling fuel injection amount based on first and second F/B controlled variables; detecting device detecting air-fuel ratio imbalance among cylinders; and correcting device correcting second F/B controlled variable in direction in which there is hardly change of fuel injection amount to lean air-fuel ratio side, according to output deviation between first and second air-fuel ratio sensors, if air-fuel ratio imbalance is detected.
摘要翻译：如果气缸之间存在空燃比不均衡，则抑制发射劣化。控制发动机的装置（100）包括分别设置在催化剂的上游和下游的第一和第二空燃比传感器，具有：第一确定装置根据第一空气 - 燃料比传感器的输出值和目标值之间的偏差确定第一F / B控制变量，燃油比传感器; 第二确定装置根据第二空燃比传感器的输出值和目标值之间的偏差确定第二F / B控制变量; 基于第一和第二F / B控制变量控制燃料喷射量的控制装置; 检测装置检测气缸之间的空燃比不平衡; 以及根据第一和第二空燃比传感器之间的输出偏差校正第二F / B控制变量，其中燃料喷射量几乎不变化到稀空燃比侧的方向上，如果空燃比不平衡被检测到。

4. 发明授权

US09885307B2 Control apparatus for internal combustion engine 有权
公开(公告)号：US09885307B2
公开(公告)日：2018-02-06
申请号：US14390234
申请日：2012-04-10
申请人： Yuji Yamaguchi , Norihisa Nakagawa , Shuntaro Okazaki
发明人： Yuji Yamaguchi , Norihisa Nakagawa , Shuntaro Okazaki
IPC分类号： F02D41/30 , F02D41/14
CPC分类号： F02D41/30 , F02D41/1401 , F02D41/1441 , F02D41/1477 , F02D2041/1422
摘要： Invention suppresses deterioration of emission if there is air-fuel ratio imbalance among cylinders. Apparatus (100) controlling an engine including first and second air-fuel ratio sensors respectively disposed on upstream and downstream of catalyst, has: first determining device determining first F/B controlled variable according to deviation between output value and target value of first air-fuel ratio sensor; second determining device determining second F/B controlled variable according to deviation between output value and target value of second air-fuel ratio sensor; controlling device controlling fuel injection amount based on first and second F/B controlled variables; detecting device detecting air-fuel ratio imbalance among cylinders; and correcting device correcting second F/B controlled variable in direction in which there is hardly change of fuel injection amount to lean air-fuel ratio side, according to output deviation between first and second air-fuel ratio sensors, if air-fuel ratio imbalance is detected.

5. 发明授权

US09765672B2 Control system of internal combustion engine 有权
公开(公告)号：US09765672B2
公开(公告)日：2017-09-19
申请号：US14763370
申请日：2013-01-29
申请人： Shuntaro Okazaki , Norihisa Nakagawa , Yuji Yamaguchi
发明人： Shuntaro Okazaki , Norihisa Nakagawa , Yuji Yamaguchi
IPC分类号： F01N3/20 , F01N9/00 , G01N27/41 , F02D41/02 , F02D41/14 , F01N11/00 , F01N13/00
CPC分类号： F01N9/00 , F01N11/007 , F01N13/009 , F01N13/0093 , F01N2430/06 , F01N2560/025 , F01N2560/14 , F01N2900/1624 , F02D41/0295 , F02D41/1454 , F02D41/1475 , G01N27/41
摘要： This control device for an internal combustion engine equipped with an exhaust purification catalyst, which is disposed in an exhaust passage of the internal combustion engine and capable of storing oxygen, includes: a downstream air-fuel ratio detection means that is disposed downstream of the exhaust purification catalyst in the exhaust flow direction; and an inflow air-fuel ratio control means that controls the air-fuel ratio of exhaust gas flowing into the exhaust purification catalyst. If the outflow air-fuel ratio detected by the downstream air-fuel ratio detection means is equal to or less than a rich-determination air-fuel ratio, which is richer than the stoichiometric air-fuel ratio, the inflow air-fuel ratio control means sets the target air-fuel ratio of exhaust gas flowing into the exhaust purification catalyst continuously or intermittently leaner than the stoichiometric air-fuel ratio until the oxygen storage amount of the exhaust purification catalyst reaches a prescribed storage amount. If the oxygen storage amount of the exhaust purification catalyst is equal to or greater than the prescribed storage amount, the inflow air-fuel ratio control means sets the target air-fuel ratio continuously or intermittently richer than the stoichiometric air-fuel ratio until the oxygen storage amount decreases toward zero without reaching the maximum oxygen storage amount.

6. 发明申请

US20100218485A1 AIR-FUEL RATIO CONTROL APPARATUS 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：US20100218485A1
公开(公告)日：2010-09-02
申请号：US12439902
申请日：2007-09-05
申请人： Takahiko Fujiwara , Norihisa Nakagawa , Naoto Kato , Shuntaro Okazaki , Koji Ide
发明人： Takahiko Fujiwara , Norihisa Nakagawa , Naoto Kato , Shuntaro Okazaki , Koji Ide
IPC分类号： F01N11/00 , F01N3/10 , F01N9/00
CPC分类号： F02D41/027 , F01N2570/16 , F02D41/0295 , F02D41/1454 , F02D2200/0814
摘要： A fuel injection amount is controlled so that the air-fuel 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).
摘要翻译：控制燃料喷射量，使得流入催化剂（6）的废气的空燃比围绕化学计量空燃比振荡。当估计催化剂（6）的储氧能力水平低于预定的参考容量时，围绕理论空燃比振荡的废气的空燃比的幅度通过控制燃料喷射量。基于来自设置在催化剂（6）下游的氧传感器（14）的输出信号的振幅来估计催化剂（6）的储氧能力水平。

7. 发明授权

US07474956B2 Air-fuel ratio control system of internal combustion engine 有权
标题翻译：内燃机空燃比控制系统
公开(公告)号：US07474956B2
公开(公告)日：2009-01-06
申请号：US11885266
申请日：2006-09-13
申请人： Norihisa Nakagawa , Takahiko Fujiwara , Taiga Hagimoto , Junichi Kako , Naoto Kato , Shuntaro Okazaki
发明人： Norihisa Nakagawa , Takahiko Fujiwara , Taiga Hagimoto , Junichi Kako , Naoto Kato , Shuntaro Okazaki
IPC分类号： G06F19/00 , F02D41/14 , F01N3/10
CPC分类号： F02D41/1441 , F01N2560/025 , F01N2560/14 , F02D41/123 , F02D41/1454 , F02D41/1456 , F02D2041/1409 , F02D2041/1422 , F02D2200/0814
摘要： An air-fuel ratio control system maintaining constant an oxygen storage amount or oxygen release amount per unit time with respect to an exhaust purification catalyst having an oxygen storage capacity even if the intake air amount changes is provided.An air-fuel ratio control system of an internal combustion engine having an intake air amount detecting means, a linear air-fuel ratio sensor arranged at an upstream side of an exhaust purification catalyst, an O2 sensor arranged at a downstream side of said exhaust purification catalyst, a target air-fuel ratio controlling means for performing feedback control of a target air-fuel ratio of exhaust flowing into the exhaust purification catalyst based on output information from the intake air amount detecting means and the O2 sensor, and a fuel injection amount controlling means for performing feedback control of the fuel injection amount based on output information of the linear air-fuel ratio sensor so as to achieve the target air-fuel ratio, characterized in that the target air-fuel ratio controlling means performs feedback control of the target air-fuel ratio so that even when the intake air amount changes, a correction amount per unit time of an oxygen storage amount of the exhaust purification catalyst is made constant.
摘要翻译：即使提供进气量变化，也能够提供相对于具有储氧能力的排气净化催化剂，每单位时间保持恒定氧气储存量或氧释放量的空燃比控制系统。一种内燃机的空燃比控制系统，具有进气量检测装置，布置在排气净化催化剂的上游侧的线性空燃比传感器，配置在排气净化装置的下游侧的O2传感器催化剂，目标空燃比控制装置，用于根据来自进气量检测装置和O2传感器的输出信息，对流入排气净化催化剂的排气的目标空燃比进行反馈控制;燃料喷射量控制装置，用于基于线性空燃比传感器的输出信息进行燃料喷射量的反馈控制，以实现目标空燃比，其特征在于，所述目标空燃比控制装置执行所述目标空燃比控制装置的反馈控制，目标空燃比，使得即使当进气量变化时，排气的氧气存储量的每单位时间的校正量净化催化剂保持恒定。

8. 发明申请

US20100108046A1 AIR-FUEL RATIO CONTROL DEVICE AND AIR-FUEL RATIO CONTROL METHOD FOR INTERNAL COMBUSTION ENGINE 有权
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：US20100108046A1
公开(公告)日：2010-05-06
申请号：US12595767
申请日：2008-04-11
申请人： Norihisa Nakagawa , Takahiko Fujiwara , Taiga Hagimoto , Junichi Kako , Naoto Kato , Shuntaro Okazaki
发明人： Norihisa Nakagawa , Takahiko Fujiwara , Taiga Hagimoto , Junichi Kako , Naoto Kato , Shuntaro Okazaki
IPC分类号： F02D41/00
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 provided upstream from a three-way catalyst, and an oxygen sensor 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上游的空燃比传感器和设置在三元催化剂下游的氧传感器。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。

9. 发明申请

US20100024790A1 AIR-FUEL RATIO CONTROL SYSTEM OF A MULTI-CYLINDER INTERNAL COMBUSTION ENGINE 有权
标题翻译：多缸内燃机的空燃比比控制系统
公开(公告)号：US20100024790A1
公开(公告)日：2010-02-04
申请号：US12443782
申请日：2007-08-13
申请人： Takahiko Fujiwara , Norihisa Nakagawa , Taiga Hagimoto , Junichi Kako , Naoto Kato , Shuntaro Okazaki , Koji Ide
发明人： Takahiko Fujiwara , Norihisa Nakagawa , Taiga Hagimoto , Junichi Kako , Naoto Kato , Shuntaro Okazaki , Koji Ide
IPC分类号： F02D41/00
CPC分类号： F02D41/2454 , F02D13/023 , F02D41/1454 , F02D41/2438 , F02D41/2474 , Y02T10/18
摘要： An air-fuel ratio control system of a multi-cylinder internal combustion engine provided with a throttle valve and opening characteristic control means, which system performs feedback control of an air-fuel ratio based on an output of a sensor detecting an air-fuel ratio of exhaust gas and is capable of performing more accurate air-fuel ratio control, is provided. In the feedback control, the relationship of the output of the sensor and a feedback value is corrected based on a feedback learning correction value learned and determined based on the output of the sensor during the feedback control, and, when newly learning the feedback learning correction value, the intake air amount is controlled by only the throttle valve.
摘要翻译：具有节气门和开启特性控制装置的多缸内燃机的空燃比控制系统，其基于检测空燃比的传感器的输出进行空燃比的反馈控制的排气，能够进行更精确的空燃比控制。在反馈控制中，基于在反馈控制期间基于传感器的输出而学习和确定的反馈学习校正值来校正传感器的输出与反馈值的关系，并且当新学习反馈学习校正时值，进气量仅由节流阀控制。

10. 发明授权

US09683470B2 Exhaust gas control apparatus for internal combustion engine 有权
公开(公告)号：US09683470B2
公开(公告)日：2017-06-20
申请号：US14368832
申请日：2011-12-27
申请人： Takahiko Fujiwara , Norihisa Nakagawa , Kouichi Kimura , Shuntaro Okazaki , Keisuke Nagasaka , Ichiro Kitamura , Satoshi Kamitani , Koji Morita
发明人： Takahiko Fujiwara , Norihisa Nakagawa , Kouichi Kimura , Shuntaro Okazaki , Keisuke Nagasaka , Ichiro Kitamura , Satoshi Kamitani , Koji Morita
IPC分类号： F01N3/20 , F01N3/22 , F01N9/00 , F01N11/00 , F02D41/02 , F01N3/10
CPC分类号： F01N3/2006 , F01N3/101 , F01N3/20 , F01N3/22 , F01N9/00 , F01N11/00 , F01N2240/02 , F01N2260/04 , F01N2430/08 , F01N2560/025 , F01N2560/14 , F01N2590/11 , F01N2900/10 , F02D41/0255 , Y02T10/22 , Y02T10/47
摘要： An exhaust gas control apparatus for an internal combustion engine, controls an exhaust operation of the internal combustion engine (200) provided with an exhaust gas purification catalyst (216) in an exhaust passage (215). The exhaust gas control apparatus for the internal combustion engine is provided with; a warming-up device configured to warm up the exhaust gas purification catalyst; and an oxygen supplying device (220, 221) configured to supply oxygen to the exhaust gas purification catalyst after the end of the warm-up. This makes it possible to preferably desorb sulfur adsorbed to the exhaust gas purification catalyst during warm-up. It is therefore possible to suppress a reduction in purification ability of the exhaust gas purification catalyst due to sulfur coating.

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