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。

公开(公告)号：US07162862B2

公开(公告)日：2007-01-16

申请号：US10479948

申请日：2002-06-18

申请人： Toshinari Nagai ,  Akihiro Katayama ,  Naoto Kato ,  Yukio Kuroda ,  Yasuhiro Kuze ,  Hiroshi Sawada ,  Takahiro Uchida ,  Naoki Baba ,  Shinji Kojima

发明人： Toshinari Nagai ,  Akihiro Katayama ,  Naoto Kato ,  Yukio Kuroda ,  Yasuhiro Kuze ,  Hiroshi Sawada ,  Takahiro Uchida ,  Naoki Baba ,  Shinji Kojima

IPC分类号： F01N3/00

CPC分类号： F01N3/0828 ,  B01D53/9495 ,  F01N3/2828 ,  F01N9/005 ,  F01N2330/06 ,  F01N2430/06 ,  F01N2570/10 ,  F01N2570/12 ,  F01N2570/14 ,  F01N2570/16 ,  F02D41/003 ,  F02D41/025 ,  F02D41/1441 ,  F02D41/1455 ,  F02D41/1456 ,  F02D41/1465 ,  F02D2041/1433 ,  F02D2200/0802 ,  Y02T10/26 ,  Y02T10/47

摘要： An air-fuel ratio control apparatus estimates, on the basis of an exhaust air-fuel ratio of exhaust gas flowing into an exhaust purifying catalyst unit disposed in an exhaust passage of an engine, an emission of at least one specific component contained in exhaust gas flowing out of the exhaust purifying catalyst unit. The air-fuel ratio control apparatus performs the estimation by use of a model, and controls the air-fuel ratio in such a manner that the estimation value reaches a target state. The model is previously determined in consideration of the mass balance of the specific component.

摘要翻译： 空燃比控制装置基于流入发动机的排气通路内的排气净化催化剂单元的排气的排气空燃比，估计废气中含有的至少一个特定成分的排放 流出排气净化催化剂单元。 空燃比控制装置使用模型进行估计，并且以估计值达到目标状态的方式控制空燃比。 该模型先前是根据具体组件的质量平衡来确定的。

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.

公开(公告)号：US06546719B2

公开(公告)日：2003-04-15

申请号：US09956992

申请日：2001-09-21

申请人： Akira Kamoto ,  Toshinari Nagai ,  Akihiro Katayama ,  Naoto Kato

发明人： Akira Kamoto ,  Toshinari Nagai ,  Akihiro Katayama ,  Naoto Kato

IPC分类号： F01N300

CPC分类号： F02D41/0295 ,  F01N11/007 ,  F01N2550/02 ,  F01N2570/16 ,  Y02T10/47

摘要： An air-fuel ratio control apparatus of an internal combustion engine according to the present invention is provided with an oxygen storage amount estimator for estimating an oxygen storage amount of an exhaust purifying catalyst and air-fuel ratio control means for controlling an air-fuel ratio, based on the oxygen storage amount. An upper threshold and a lower threshold are set for the oxygen storage amount, and the air-fuel ratio controller performs such control that, when the oxygen storage amount is larger than the upper threshold, the controller controls the air-fuel ratio to a rich region and that, when the oxygen storage amount is smaller than the lower threshold, the controller controls the air-fuel ratio to a lean region. Since this control makes the oxygen storage amount vary between the upper threshold and the lower threshold (within a predetermined range), it is feasible to promote activation of the exhaust purifying catalyst, so as to keep purification performance of the exhaust purifying catalyst high, and to implement stable control of air-fuel ratio.

摘要翻译： 根据本发明的内燃机的空燃比控制装置设置有用于估计排气净化催化剂的氧气储存量的储氧量估计器和用于控制空燃比的空燃比控制装置 ，基于氧气储存量。 对于氧气存储量设定上阈值和下阈值，空燃比控制器进行这样的控制，即当氧气存储量大于上阈值时，控制器将空燃比控制为丰富 并且当氧气存储量小于下限阈值时，控制器将空燃比控制到稀薄区域。 由于该控制使得氧气存储量在上限阈值和下限阈值之间变化（在预定范围内），因此能够促进排气净化催化剂的活化，从而使排气净化催化剂的净化性能保持在较高水平， 实现空燃比稳定控制。

公开(公告)号：US06666199B2

公开(公告)日：2003-12-23

申请号：US09969642

申请日：2001-10-04

申请人： Naoto Kato ,  Toshinari Nagai ,  Akira Kamoto ,  Akihiro Katayama

发明人： Naoto Kato ,  Toshinari Nagai ,  Akira Kamoto ,  Akihiro Katayama

IPC分类号： F02D4100

CPC分类号： F02D41/1494 ,  F02D41/06 ,  F02D41/222 ,  Y02T10/40

摘要： In a control device, in a control device of an internal combustion engine provided with an internal combustion engine main body mounted to a vehicle and a heater operating on the basis of an output from a specific sensor given as a trigger at least before the internal combustion engine main body starts, whether or not the heater is operated before the start is stored, and it is judged that the sensor has failed when operation of the heater is not stored.

公开(公告)号：US06901744B2

公开(公告)日：2005-06-07

申请号：US10212105

申请日：2002-08-06

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： F02D45/00 ,  B01D53/86 ,  F01N3/20 ,  F01N3/24 ,  F02D41/02 ,  F02D41/04 ,  F02D41/14 ,  F01N3/00

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.

摘要翻译： 根据本发明的内燃机的空燃比控制装置设置有储氧量估计装置，下游排气空燃比检测装置，最大氧气存储量估计装置和空燃比目标设定装置 。 氧气存储量估计装置基于位于排气路径上的排气净化催化剂的氧吸附/脱附量的历史来估计排气净化催化剂的氧气存储量。 下游排气空燃比检测装置位于排气净化催化剂的下游，并且检测排气净化催化剂下游的排气空燃比。 最大氧气存储量估计装置基于当检测到的排气空燃比为预定空燃比时的氧气存储量估计值来估计最大氧气存储量。 这样可以有效地利用排气净化催化剂的吸氧能力，提高排气净化性能。

公开(公告)号：US06792750B2

公开(公告)日：2004-09-21

申请号：US10224384

申请日：2002-08-21

申请人： Toshinari Nagai ,  Naoto Kato ,  Akihiro Katayama ,  Kentaro Matsumoto ,  Shinji Kojima ,  Naoki Baba

发明人： Toshinari Nagai ,  Naoto Kato ,  Akihiro Katayama ,  Kentaro Matsumoto ,  Shinji Kojima ,  Naoki Baba

IPC分类号： F01N300

CPC分类号： B60W10/06 ,  B01D53/9495 ,  B60K6/445 ,  B60L11/126 ,  B60L11/14 ,  B60L15/2045 ,  B60L2220/14 ,  B60L2240/423 ,  B60L2240/443 ,  B60L2240/445 ,  B60L2270/12 ,  B60W2510/0676 ,  B60W2510/068 ,  B60W2710/0622 ,  F01N3/0807 ,  F01N3/20 ,  F01N2570/10 ,  F01N2570/12 ,  F01N2570/16 ,  F02D17/04 ,  F02D41/0235 ,  F02D41/0295 ,  F02D41/042 ,  F02D2200/0814 ,  F02D2200/0816 ,  Y02A50/2322 ,  Y02T10/6217 ,  Y02T10/6239 ,  Y02T10/645 ,  Y02T10/7077 ,  Y02T10/72 ,  Y02T10/7283

摘要： A catalytic emission control apparatus of an internal combustion engine that has an engine stop mode of stopping the internal combustion engine during a run of a vehicle utilizes an oxygen absorption-storage action of an emission control catalyst disposed in an exhaust passage of the internal combustion engine. The emission control apparatus has a storage computing device that computes a storage of oxygen in the emission control catalyst, and air-fuel ratio controller performs an air-fuel ratio control of the internal combustion engine based on the storage of oxygen computed by the storage computing device. The storage computing device computes the storage of oxygen during the engine stop mode of the internal combustion engine. The air-fuel ratio controller performs the air-fuel ratio control when the internal combustion engine is restarted after the engine stop mode is discontinued, based on the storage of oxygen computed by the storage computing device during the engine stop mode.

摘要翻译： 具有在车辆行驶期间停止内燃机的发动机停止模式的内燃机的催化排放控制装置利用设置在内燃机的排气通道中的排放控制催化剂的氧吸收储存动作 。 排放控制装置具有计算排放控制催化剂中的氧气的存储的存储计算装置，空燃比控制装置根据由存储运算计算出的氧气的储存来进行内燃机的空燃比控制 设备。 存储计算装置在内燃机的发动机停止模式期间计算氧气的储存。 基于在发动机停止模式期间由存储计算装置计算的氧气的储存，空燃比控制器在停止发动机停止模式之后重新启动内燃机时执行空燃比控制。

公开(公告)号：US06502389B2

公开(公告)日：2003-01-07

申请号：US10025452

申请日：2001-12-26

申请人： Akihiro Katayama ,  Toshinari Nagai ,  Akira Kamoto ,  Naoto Kato ,  Shinji Kojima ,  Naoki Baba

发明人： Akihiro Katayama ,  Toshinari Nagai ,  Akira Kamoto ,  Naoto Kato ,  Shinji Kojima ,  Naoki Baba

IPC分类号： F01N300

CPC分类号： F02D41/1474 ,  F01N13/009 ,  F01N13/011 ,  F02D41/0295 ,  F02D41/1441 ,  F02D41/1456 ,  F02D2200/0802 ,  F02D2200/0814

摘要： An air-fuel ratio control system for an internal combustion engine estimates an oxygen storage amount of a catalyst based on a record of an oxygen storage amount, and controls an air-fuel ratio based on the estimated oxygen storage amount. The catalyst is divided into multiple sections in a flow direction of an exhaust gas, the oxygen storage amount in a specified section is estimated according to a behavior of an exhaust gas on upstream and downstream sides of the respective specified sections, and the air-fuel ratio is controlled based on the estimated oxygen storage amount in the specified section.

摘要翻译： 用于内燃机的空燃比控制系统基于氧气存储量的记录来估计催化剂的储氧量，并且基于估计的氧气存储量来控制空燃比。 催化剂在废气的流动方向上分为多个部分，根据在各个特定部分的上游和下游侧的废气的行为来估计特定部分中的储氧量，并且空气燃料 基于规定部分中的估计氧气存储量来控制比率。

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。

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。