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11. 发明授权

US4739614A Double air-fuel ratio sensor system in internal combustion engine 失效
标题翻译：内燃机双重空燃比传感器系统
公开(公告)号：US4739614A
公开(公告)日：1988-04-26
申请号：US831566
申请日：1986-02-21
申请人： Toshiyasu Katsuno , Nobuaki Kayanuma , Yasushi Sato , Toshio Tanahashi , Yoshiki Chujo , Toshinari Nagai , Kohichi Hasegawa , Hironori Bessho , Takatoshi Masui
发明人： Toshiyasu Katsuno , Nobuaki Kayanuma , Yasushi Sato , Toshio Tanahashi , Yoshiki Chujo , Toshinari Nagai , Kohichi Hasegawa , Hironori Bessho , Takatoshi Masui
IPC分类号： F01N11/00 , F02D41/14
CPC分类号： F02D41/1488 , F01N11/007 , F02D41/1441 , F01N2550/02 , F01N2900/0422 , F02D41/1456 , Y02T10/47
摘要： In a double air-fuel ratio sensor system including two air-fuel ratio sensors upstream and downstream of a catalyst converter provided in an exhaust passage, the actual air-fuel ratio is adjusted in accordance with an air-fuel ratio correction amount calculated by using the output of the upstream-side air-fuel ratio sensor and an air-fuel ratio feedback control parameter such as delay time periods, skip amounts, or integration amounts calculated by using the output of the downstream-side air-fuel ratio sensor, and the calculation of the air-fuel ratio feedback control parameter is prohibited when the downstream-side air-fuel ratio sensor is in an abnormal state.
摘要翻译：在设置在排气通路中的催化剂转化器的上游和下游的两个空燃比传感器系统的双重空燃比传感器系统中，根据通过使用计算出的空燃比校正量来调整实际空燃比上游侧空燃比传感器的输出和利用下游侧空燃比传感器的输出计算的延迟时间段，跳过量或积分量等空燃比反馈控制参数，以及当下游侧空燃比传感器处于异常状态时，禁止计算空燃比反馈控制参数。

12. 发明授权

US4712373A Double air-fuel ratio sensor system having improved response characteristics 失效
标题翻译：双重空燃比传感器系统具有改进的响应特性
公开(公告)号：US4712373A
公开(公告)日：1987-12-15
申请号：US849839
申请日：1986-04-09
申请人： Toshinari Nagai , Takatoshi Masui , Yasushi Satou , Toshiyasu Katsuno
发明人： Toshinari Nagai , Takatoshi Masui , Yasushi Satou , Toshiyasu Katsuno
IPC分类号： F02D33/00 , F02D41/00 , F02D41/14
CPC分类号： F02D41/1441
摘要： In a double air-fuel sensor system including two air-fuel ratio sensors upstream and downstream of a catalyst converter provided in an exhaust gas passage, the actual air-fuel ratio is adjusted in accordance with the output of the upstream-side and downstream-side air-fuel ratio sensors. For a predetermined time period after the engine enters an air-fuel ratio feedback control for the downstream-side air-fuel ratio sensor, the control speed by the downstream-side air-fuel ratio sensor is increased.
摘要翻译：在设置在废气通道中的催化剂转化器的上游和下游的两个空燃比传感器系统中，实际空燃比根据上游侧和下游侧的输出进行调节，侧空燃比传感器。在发动机进入下游侧空燃比传感器的空燃比反馈控制之后的预定时间段内，下游侧空燃比传感器的控制速度增加。

13. 发明授权

US08234853B2 Catalyst degradation determining method 失效
标题翻译：催化剂降解测定方法
公开(公告)号：US08234853B2
公开(公告)日：2012-08-07
申请号：US11133205
申请日：2005-05-20
申请人： Akira Kamoto , Toshinari Nagai , Yasuhiro Oi , Noriyasu Adachi , Koji Ide , Daisuke Kobayashi , Shuntaro Okazaki , Naoto Kato , Takahiro Uchida
发明人： Akira Kamoto , Toshinari Nagai , Yasuhiro Oi , Noriyasu Adachi , Koji Ide , Daisuke Kobayashi , Shuntaro Okazaki , Naoto Kato , Takahiro Uchida
IPC分类号： F01N3/00
CPC分类号： F01N3/101 , F01N11/00 , F01N11/007 , F01N13/009 , F01N13/0093 , F01N2550/02 , F02D2200/0816 , Y02T10/22 , Y02T10/47
摘要： A catalyst degradation determining method includes the steps of: controlling an upstream-of-catalyst air-fuel ratio occurring upstream of a first catalyst to an air-fuel ratio that is rich of a stoichiometric air-fuel ratio so that first and second catalysts store oxygen up to a maximum storage amount of oxygen. The method then includes the steps of controlling the upstream-of-catalyst air-fuel ratio to a first lean air-fuel ratio until an output of a downstream-of-first-catalyst sensor indicates a lean air-fuel ratio, and then to a second lean air-fuel ratio and that has a value that is determined in accordance with an oxidizing-reducing capability index value, until a time point when an output of a downstream-of-second-catalyst air-fuel ratio sensor indicates an air-fuel ratio that is lean.
摘要翻译：一种催化剂降解测定方法，包括以下步骤：将发生在第一催化剂上游的催化剂上游空燃比控制为具有理论空燃比的空燃比，使第一催化剂和第二催化剂储存氧气达到最大储存量的氧气。该方法包括以下步骤：将催化剂上游空燃比控制到第一稀空燃比，直到第一催化剂下游传感器的输出表示稀空燃比，然后至第二稀空燃比，其具有根据氧化还原能力指标值确定的值，直到下游二催化剂空燃比传感器的输出表示空气 - 精益比。

14. 发明授权

US07198952B2 Catalyst deterioration detecting apparatus and method 失效
标题翻译：催化剂劣化检测装置及方法
公开(公告)号：US07198952B2
公开(公告)日：2007-04-03
申请号：US10193900
申请日：2002-07-15
申请人： Takahiro Uchida , Hiroshi Sawada , Toshinari Nagai , Akihiro Katayama , Yasuhiro Kuze , Naoto Kato
发明人： Takahiro Uchida , Hiroshi Sawada , Toshinari Nagai , Akihiro Katayama , Yasuhiro Kuze , Naoto Kato
IPC分类号： G01N31/10 , G01N33/22 , F01N3/18 , F01N3/20 , F01N3/22
CPC分类号： F01N11/007 , B01D53/9495 , F01N2550/02 , F02D41/0295 , F02D41/1408 , F02D41/22 , F02D2200/0814 , F02D2200/0816 , Y02T10/40 , Y02T10/47 , Y10T436/20 , Y10T436/208339 , Y10T436/25875
摘要： An upstream side catalyst and a downstream side catalyst are disposed in an exhaust passage. A first oxygen sensor is disposed between these two catalysts and a second oxygen sensor is disposed downstream of the downstream side catalyst. The air-fuel ratio is forcibly oscillated and the oxygen storage capacity of the upstream side catalyst is detected. Deterioration of the upstream side catalyst is then detected based on whether this oxygen storage capacity is larger than a predetermined value. The forced oscillation of the air-fuel ratio is performed only when the oxygen storage state of the downstream side catalyst is appropriate.
摘要翻译：上游侧催化剂和下游侧催化剂设置在排气通道中。第一氧传感器设置在这两个催化剂之间，第二氧传感器设置在下游侧催化剂的下游。空燃比被强制振荡，并检测上游侧催化剂的储氧能力。然后基于该储氧容量是否大于预定值来检测上游侧催化剂的劣化。仅当下游侧催化剂的储氧状态适当时才进行空燃比的强制振荡。

15. 发明授权

US07165389B2 Catalyst degradation determining method 有权
标题翻译：催化剂降解测定方法
公开(公告)号：US07165389B2
公开(公告)日：2007-01-23
申请号：US11133208
申请日：2005-05-20
申请人： Akira Kamoto , Toshinari Nagai , Yosuhiro Oi , Noriyasu Adachi , Koji Ide , Daisuke Kobayashi , Shuntaro Okazaki , Naoto Kato , Takahiro Uchida
发明人： Akira Kamoto , Toshinari Nagai , Yosuhiro Oi , Noriyasu Adachi , Koji Ide , Daisuke Kobayashi , Shuntaro Okazaki , Naoto Kato , Takahiro Uchida
IPC分类号： F01N3/00
CPC分类号： F01N3/101 , F01N11/00 , F01N11/007 , F01N13/009 , F01N13/0093 , F01N2550/02 , F02D2200/0816 , Y02T10/22 , Y02T10/47
摘要： A catalyst degradation determining method includes the steps of: controlling an upstream-of-catalyst air-fuel ratio occurring upstream of a first catalyst to an air-fuel ratio that is rich of a stoichiometric air-fuel ratio so that first and second catalysts store oxygen up to a maximum storage amount of oxygen. The method then includes the steps of controlling the upstream-of-catalyst air-fuel ratio to a first lean air-fuel ratio until an output of a downstream-of-first-catalyst sensor indicates a lean air-fuel ratio, and then to a second lean air-fuel ratio and that has a value that is determined in accordance with an oxidizing-reducing capability index value, until a time point when an output of a downstream-of-second-catalyst air-fuel ratio sensor indicates an air-fuel ratio that is lean.
摘要翻译：一种催化剂降解测定方法，包括以下步骤：将发生在第一催化剂上游的催化剂上游空燃比控制为具有理论空燃比的空燃比，使第一催化剂和第二催化剂储存氧气达到最大储存量的氧气。该方法包括以下步骤：将催化剂上游空燃比控制到第一稀空燃比，直到第一催化剂下游传感器的输出表示稀空燃比，然后至第二稀空燃比，其具有根据氧化还原能力指标值确定的值，直到下游二催化剂空燃比传感器的输出表示空气 - 精益比。

16. 发明申请

US20050217242A1 Catalyst degradation determining method 失效
公开(公告)号：US20050217242A1
公开(公告)日：2005-10-06
申请号：US11133205
申请日：2005-05-20
申请人： Akira Kamoto , Toshinari Nagai , Yasuhiro Oi , Noriyasu Adachi , Koji Ide , Daisuke Kobayashi , Shuntaro Okazaki , Naoto Kato , Takahiro Uchida
发明人： Akira Kamoto , Toshinari Nagai , Yasuhiro Oi , Noriyasu Adachi , Koji Ide , Daisuke Kobayashi , Shuntaro Okazaki , Naoto Kato , Takahiro Uchida
IPC分类号： F02D45/00 , F01N3/00 , F01N3/20 , F01N3/24 , F01N7/00 , F01N11/00 , F02D41/14
CPC分类号： F01N3/101 , F01N11/00 , F01N11/007 , F01N13/009 , F01N13/0093 , F01N2550/02 , F02D2200/0816 , Y02T10/22 , Y02T10/47
摘要： A catalyst degradation determining method includes the steps of: controlling an upstream-of-catalyst air-fuel ratio occurring upstream of a first catalyst to an air-fuel ratio that is rich of a stoichiometric air-fuel ratio so that first and second catalysts store oxygen up to a maximum storage amount of oxygen. The method then includes the steps of controlling the upstream-of-catalyst air-fuel ratio to a first lean air-fuel ratio until an output of a downstream-of-first-catalyst sensor indicates a lean air-fuel ratio, and then to a second lean air-fuel ratio and that has a value that is determined in accordance with an oxidizing-reducing capability index value, until a time point when an output of a downstream-of-second-catalyst air-fuel ratio sensor indicates an air-fuel ratio that is lean.

17. 发明授权

US06481201B2 Air-fuel ratio control apparatus of internal combustion engine 失效
公开(公告)号：US06481201B2
公开(公告)日：2002-11-19
申请号：US09880029
申请日：2001-06-14
申请人： Junichi Kako , Toshinari Nagai , Naohide Fuwa , Kazunori Kojima , Akihiro Katayama , Naoto Kato
发明人： Junichi Kako , Toshinari Nagai , Naohide Fuwa , Kazunori Kojima , Akihiro Katayama , Naoto Kato
IPC分类号： F01N300
CPC分类号： F01N11/007 , F02D41/0295 , F02D41/047 , F02D41/1441 , F02D41/1456 , F02D2041/1422 , F02D2200/0814 , F02D2200/0816 , Y02T10/47
摘要： An air-fuel ratio control apparatus of an internal combustion engine according to the present invention is provided with oxygen storage amount estimating means, downstream exhaust air-fuel ratio detecting means, maximum oxygen storage amount estimating means, and air-fuel ratio target setting means. The oxygen storage amount estimating means estimates an oxygen storage amount of an exhaust purifying catalyst, based on a history of an oxygen adsorption/desorption amount of the exhaust purifying catalyst located on an exhaust path. The downstream exhaust air-fuel ratio detecting means is located downstream of the exhaust purifying catalyst and detects an exhaust air-fuel ratio downstream of the exhaust purifying catalyst. The maximum oxygen storage amount estimating means estimates a maximum oxygen storage amount, based on an oxygen storage amount estimate when the exhaust air-fuel ratio detected is a predetermined air-fuel ratio. This permits effective utilization of oxygen occlusion capability of the exhaust purifying catalyst and improvement in exhaust purification performance.

18. 发明授权

US5814283A Exhaust purifier of internal combustion engine 失效
标题翻译：内燃机排气净化器
公开(公告)号：US5814283A
公开(公告)日：1998-09-29
申请号：US744229
申请日：1996-11-05
申请人： Hiroki Matuoka , Masaaki Tanaka , Shigemitu Iisaka , Michio Furuhashi , Toshinari Nagai , Tadayuki Nagai , Takashi Kawai , Kenji Harima , Yuuichi Gotou
发明人： Hiroki Matuoka , Masaaki Tanaka , Shigemitu Iisaka , Michio Furuhashi , Toshinari Nagai , Tadayuki Nagai , Takashi Kawai , Kenji Harima , Yuuichi Gotou
IPC分类号： F01N3/20 , F01N3/22 , F01N3/30 , F01N9/00 , F01N13/02 , B01D53/34 , G05D7/00
CPC分类号： F01N3/222 , F01N13/009 , F01N3/2013 , F01N3/2053 , F01N3/22 , F01N9/00 , Y02T10/26 , Y02T10/47
摘要： An exhaust purifier of an internal combustion engine supplies secondary air into an exhaust pipe without cooling nor inactivating an electrically heated catalyst (EHC) that is active. The exhaust purifier includes the EHC 3 disposed in the exhaust pipe 2, a main catalyst 4 disposed in the exhaust pipe 2 downstream from the EHC 3, and a unit for supplying secondary air into the exhaust pipe 2. The secondary air supply unit has a main path 10 for supplying secondary air into a space defined in the exhaust pipe 2 between the EHC 3 and the main catalyst 4 when it is determined that the main catalyst 4 is active. The secondary air supply unit may additionally have a second path 9 for supplying secondary air into the exhaust pipe 2 on the upstream side of the EHC 3 when it is determined that the EHC 3 is active, so that the secondary air may pass through the EHC 3 and reach the main catalyst 4.
摘要翻译：内燃机的排气净化器将二次空气供给到排气管中，而不会冷却也不致使活化的电加热催化剂（EHC）失活。排气净化器包括设置在排气管2中的EHC 3，设置在EHC 3下游的排气管2中的主催化剂4和用于向排气管2供给二次空气的单元。二次空气供给单元具有当确定主催化剂4是活性的时，主路径10用于在EHC 3和主催化剂4之间的排气管2中限定的空间中供应二次空气。二次空气供给单元还可以具有第二路径9，用于在确定EHC 3有效时，在EHC 3的上游侧向排气管2供给二次空气，从而二次空气可以通过EHC 3到达主催化剂4。

19. 发明授权

US5735120A Device for judging the deterioration of a catalyst of an engine 失效
标题翻译：用于判断发动机的催化剂劣化的装置
公开(公告)号：US5735120A
公开(公告)日：1998-04-07
申请号：US739967
申请日：1996-10-30
申请人： Toshinari Nagai
发明人： Toshinari Nagai
IPC分类号： G01M15/04 , F01N3/20 , F01N3/24 , F01N11/00 , F02D41/14 , F02D45/00
CPC分类号： F02D41/1441 , F01N11/007 , F02D41/2441 , F02D41/2454 , F01N2550/02 , F02D41/2445 , Y02T10/47
摘要： A device for judging the deterioration of a three-way catalyst comprising an upstream O.sub.2 sensor and a downstream O.sub.2 sensor which are arranged in the exhaust passage upstream and downstream of the three-way catalyst, respectively. The deterioration of the three-way catalyst is judged in a predetermined narrow operating region based on the output of these O.sub.2 sensors. A learning value is set for control of the air-fuel ratio for the predetermined narrow operating region separate from the other operating regions.
摘要翻译：一种用于判断包含上游O 2传感器和下游O 2传感器的三元催化剂的劣化的装置，其分别布置在三元催化剂的上游和下游的排气通道中。基于这些O 2传感器的输出，在预定的窄操作区域中判断三元催化剂的劣化。设定学习值用于控制与其他操作区域分开的预定窄操作区域的空燃比。

20. 发明授权

US5392600A System for controlling air-fuel ratio in internal combustion engine and method of the same 失效
标题翻译：用于控制内燃机空燃比的系统及其方法
公开(公告)号：US5392600A
公开(公告)日：1995-02-28
申请号：US187554
申请日：1994-01-28
申请人： Toshinari Nagai
发明人： Toshinari Nagai
IPC分类号： F01N3/24 , F02D41/14 , F02D41/34 , F01N3/20
CPC分类号： F02D41/1483 , F02D41/1441 , F02D41/148
摘要： The present invention provides an improved air-fuel ratio control system which eliminates a time lag of outputs of an outlet or second oxygen sensor at a high accuracy and adequately controls the air-fuel ratio, thus efficiently reducing an exhaust of harmful gases including HC, CO, and NOx and improving the fuel consumption. When an output voltage SOX of the second oxygen sensor is within a predetermined range between a first voltage E1 and a second voltage E2 including a reference voltage E0 corresponding to a stoichiometric air-fuel ratio, an update quantity DRSR of a rich skip amount RSR is equal to zero. When the output voltage SOX is in a range between a minimum output GSOXmin and the first voltage E1, the update quantity DRSR exponentially increases with the decrease in the voltage. When the output voltage SOX is in a range between the second voltage E2 and a maximum output GSOXmax, the update quantity DRSR exponentially decreases with the increase in the voltage. The rich skip amount RSR used in a main air-fuel ratio feed-back control is compensated with the update quantity DRSR thus determined. In the system of the invention, the air-fuel ratio is maintained in a desirable range to ensure a reduced exhaust of harmful gases when the output voltage SOX of the second oxygen sensor being within the predetermined range between E1 and E2, and rapidly approaches to a desirable target ratio for reduced emission of the exhaust gas when SOX is out of the predetermined range.
摘要翻译：本发明提供了一种改进的空燃比控制系统，其以高精度消除出口或第二氧传感器的输出的时滞，并充分地控制空燃比，从而有效地减少包括HC的有害气体的排放， CO和NOx，并提高燃料消耗。当第二氧传感器的输出电压SOX在第一电压E1和包括对应于化学计量空燃比的参考电压E0的第二电压E2之间的预定范围内时，富跳跃量RSR的更新量DRSR为等于零。当输出电压SOX在最小输出GSOXmin与第一电压E1之间的范围内时，更新量DRSR随着电压的降低而指数地增加。当输出电压SOX在第二电压E2和最大输出GSOXmax之间的范围内时，随着电压的增加，更新量DRSR呈指数下降。在主空燃比反馈控制中使用的丰量跳跃量RSR由如此确定的更新量DRSR补偿。在本发明的系统中，当第二氧传感器的输出电压SOX在E1和E2之间的预定范围内时，空燃比保持在期望的范围以确保有害气体的排放减少，并且迅速接近当SOX超出预定范围时减少废气排放的期望目标比例。

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