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    Air-fuel ratio control apparatus of internal combustion engine
    1.
    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。

    Exhaust gas purification system for internal combustion engine
    3.
    发明授权
    Exhaust gas purification system for internal combustion engine 有权
    内燃机排气净化系统

    公开(公告)号：US06860101B2

    公开(公告)日：2005-03-01

    申请号：US10266582

    申请日：2002-10-09

    申请人： Junichi Kako ,  Toshinari Nagai ,  Naoto Katoh ,  Akihiro Katayama ,  Kentaro Matsumoto ,  Shinji Kojima ,  Naoki Baba

    发明人： Junichi Kako ,  Toshinari Nagai ,  Naoto Katoh ,  Akihiro Katayama ,  Kentaro Matsumoto ,  Shinji Kojima ,  Naoki Baba

    IPC分类号： F01N3/08 ,  F02D41/02 ,  F01N3/00

    CPC分类号： F01N3/0842 ,  F01M2250/66 ,  F02D41/0275 ,  F02D2200/0806 ,  F02D2200/0811

    摘要： An exhaust gas purification system comprises a NOx catalyst for absorbing the NOx in the exhaust gas when the air-fuel ratio of the influent exhaust gas is lean and purifying by reducing the absorbed NOx with a reducing agent in the exhaust gas when the air-fuel ratio of the exhaust gas turns rich, a first unit for calculating the amount of NOx absorbed per unit time in each area of the NOx catalyst when the air-fuel ratio of the exhaust gas flowing into the NOx catalyst is lean, and a second unit for calculating the total amount of NOx absorbed into the NOx catalyst by totaling the amounts of NOx calculated by the first calculation unit for the areas of the NOx catalyst.

    摘要翻译： 废气净化系统包括：NOx吸收剂，其用于吸收废气中的NOx，当排出的废气的空燃比为稀的时，通过在空气燃料中排气中的还原剂还原吸收的NOx， 排气的比例变浓，当流入NOx催化剂的废气的空燃比变稀时，用于计算NOx催化剂的每个区域中每单位时间吸收的NOx的量的第一单元，以及第二单元 用于计算通过对由NOx催化剂的面积计算出的由第一计算单元计算的NOx的量来计算吸收到NOx催化剂中的NOx的总量。

    Air-fuel ratio control apparatus of internal combustion engine
    8.
    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：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。

    Vehicle and vehicle control method
    10.
    发明授权
    Vehicle and vehicle control method 有权
    车辆和车辆控制方法

    公开(公告)号：US08381708B2

    公开(公告)日：2013-02-26

    申请号：US12999006

    申请日：2009-06-18

    申请人： Akihiro Katayama ,  Naoto Kato ,  Shuntaro Okazaki ,  Kenji Kimura ,  Masashi Hakariya ,  Hiroaki Tsuji

    发明人： Akihiro Katayama ,  Naoto Kato ,  Shuntaro Okazaki ,  Kenji Kimura ,  Masashi Hakariya ,  Hiroaki Tsuji

    IPC分类号： F02D41/00

    CPC分类号： F02D41/1498 ,  F02D35/021 ,  F02D35/023 ,  F02D41/1401 ,  F02D41/1441 ,  F02D41/2454 ,  F02D2041/1418 ,  F02D2200/1015 ,  G01M15/11

    摘要： An engine ECU calculates a rotational variation based on a required rotation time when a complete misfire occurs in a cylinder, a required rotation time when complete combustion occurs in the cylinder, and a required rotation time during the current combustion stroke, and integrates the calculated rotational variation. If it is determined that the number of times the rotational variation has been integrated has reached a predetermined number, the engine ECU calculates an amount of learning value deviation from the integrated rotational variation. If the amount of learning value deviation is equal to or greater than a certain amount, the engine ECU corrects a learning value of a sub-feedback control with respect to the air-fuel ratio.

    摘要翻译： 发动机ECU基于在气缸中发生完全失火所需的旋转时间，在气缸中发生完全燃烧时所需的旋转时间以及当前燃烧行程期间所需的旋转时间，计算旋转变化，并且将计算出的旋转 变异。 如果确定旋转变化已经被积分的次数达到预定数量，则发动机ECU计算学习值偏离积分旋转变化量的量。 如果学习值偏差量等于或大于一定量，则发动机ECU相对于空燃比校正副反馈控制的学习值。