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    Exhaust gas control apparatus and exhaust gas purification method for internal combustion engine
    86.
    发明授权
    Exhaust gas control apparatus and exhaust gas purification method for internal combustion engine 失效
    内燃机排气控制装置及排气净化方法

    公开(公告)号：US06988359B2

    公开(公告)日：2006-01-24

    申请号：US10464572

    申请日：2003-06-19

    申请人： Koji Ide ,  Toshinari Nagai ,  Yasuhiro Oi ,  Naoto Kato

    发明人： Koji Ide ,  Toshinari Nagai ,  Yasuhiro Oi ,  Naoto Kato

    IPC分类号： F01N3/00

    CPC分类号： F02D41/1479 ,  F01N3/101 ,  F01N13/009 ,  F01N13/0093 ,  F01N2570/16 ,  F02D41/0295 ,  F02D41/2454 ,  F02D2200/0814 ,  F02D2200/0816 ,  Y02T10/22

    摘要： An exhaust gas control apparatus and an exhaust gas purification method are for an internal combustion engine provided with a first catalyst portion disposed in an exhaust passage of the internal combustion engine, and a second catalyst portion disposed in the exhaust passage downstream of the first catalyst portion. A value that changes according to at least an amount of oxygen stored in the first catalyst portion is obtained as an obtained value. An air-fuel ratio of the internal combustion engine is controlled such that the obtained value matches a target value. A value that changes according to at least an amount of oxygen stored in the second catalyst portion is calculated as a calculated value, based on at least a state of exhaust gas flowing into the second catalyst portion. The target value is changed according to the calculated value. Accordingly, harmful components, such as unburned components and oxides of nitrogen, are able to be effectively purified even if the air-fuel ratio of the internal combustion engine changes abruptly.

    摘要翻译： 排气控制装置和废气净化方法用于内燃机，该内燃机设置有设置在内燃机的排气通道中的第一催化剂部分和设置在第一催化剂部分下游的排气通道中的第二催化剂部分 。 获得根据至少存储在第一催化剂部分中的氧气量而变化的值。 控制内燃机的空燃比，使得获得的值与目标值一致。 基于至少流入第二催化剂部分的废气的状态，计算根据至少存储在第二催化剂部分中的氧的量而变化的值作为计算值。 目标值根据计算值进行更改。 因此，即使内燃机的空燃比突然变化，也能够有效地净化有害成分，例如未燃烧成分和氮氧化物。

    Air-fuel ratio control apparatus of internal combustion engine
    87.
    发明授权
    Air-fuel ratio control apparatus of internal combustion engine 失效
    内燃机空燃比控制装置

    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。

    AIR-FUEL RATIO CONTROLLER FOR INTERNAL-COMBUSTION ENGINE
    88.
    发明申请
    AIR-FUEL RATIO CONTROLLER FOR INTERNAL-COMBUSTION ENGINE 有权
    用于内燃机的空燃比控制器

    公开(公告)号：US20050072139A1

    公开(公告)日：2005-04-07

    申请号：US10953184

    申请日：2004-09-30

    申请人： Naoto Kato

    发明人： Naoto Kato

    IPC分类号： F02D45/00 ,  F02D41/12 ,  F02D41/14 ,  F01N3/00

    CPC分类号： F02D41/1441 ,  F02D41/123 ,  F02D41/1402 ,  F02D41/1454 ,  F02D41/1456 ,  F02D41/2448 ,  F02D41/2454 ,  F02D41/2474 ,  F02D41/2477 ,  F02D2041/1409 ,  F02D2041/1432

    摘要： An output signal from a downstream-side exhaust gas sensor is fed back into a fuel injection rate so that the air-fuel ratio of the exhaust gases flowing out from a catalyst may match a reference value. In this sub-feedback control process, the integral value of the deviation between the output signal of the downstream-side exhaust gas sensor and a reference value is calculated, and the resulting integral-data signal is smoothed. A learning value for compensating for the permanent error included in an air-fuel ratio signal from an A/F sensor is learnt from the integral-data signal generated by the above smoothing operation.

    摘要翻译： 来自下游侧排气传感器的输出信号被反馈到燃料喷射速率，使得从催化剂流出的废气的空燃比可以匹配参考值。 在该副反馈控制处理中，计算下游侧排气传感器的输出信号与参考值之间的偏差的积分值，并且使得到的积分数据信号平滑。 从通过上述平滑化处理生成的积分数据信号中，获知用于补偿来自A / F传感器的空燃比信号中包含的永久误差的学习值。