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    Exhaust Gas Purification Apparatus For Internal Combustion Engine
    44.
    发明申请
    Exhaust Gas Purification Apparatus For Internal Combustion Engine 有权
    内燃机废气净化装置

    公开(公告)号：US20090000277A1

    公开(公告)日：2009-01-01

    申请号：US12087509

    申请日：2007-09-06

    申请人： Kohei Yoshida ,  Yasuaki Nakano ,  Tadashi Watanabe ,  Kotaro Hayashi ,  Takamitsu Asanuma

    发明人： Kohei Yoshida ,  Yasuaki Nakano ,  Tadashi Watanabe ,  Kotaro Hayashi ,  Takamitsu Asanuma

    IPC分类号： F01N3/20

    CPC分类号： B01D53/9422 ,  B01D53/9477 ,  B01D2255/1021 ,  B01D2255/1023 ,  F01N3/0807 ,  F01N3/0814 ,  F01N3/0821 ,  F01N13/009 ,  F01N13/0093 ,  Y02C20/10

    摘要： A fuel addition valve that adds fuel into the exhaust gas passage of the engine in the form of fine fuel droplets, an upstream NOx adsorption-reduction catalyst, and a downstream NOx adsorption-reduction catalyst are arranged in this order. Platinum Pt and palladium Pd, as noble metal, are supported on the downstream NOx adsorption-reduction NOx catalyst such that the ratio of the mole number of the platinum Pt to the sum of the mole numbers of the platinum Pt and the palladium Pd is approx. 50% to approx. 80%. Only platinum Pt is supported on the upstream NOx adsorption-reduction catalyst. According to this structure, even when liquid fuel is supplied into exhaust gas, NOx can be effectively released from the NOx adsorption-reduction catalyst, and further the amount of NOx that the NOx adsorption-reduction catalyst can adsorb at a low temperature increases.

    摘要翻译： 按照该顺序排列燃料添加阀，其将燃料添加到发动机的废气通道中，其形式为精细的燃料液滴，上游的NOx吸附还原催化剂和下游的NOx吸附还原催化剂。 作为贵金属的铂Pt和钯Pd负载在下游NOx吸附还原NOx催化剂上，使得铂Pt的摩尔数与铂Pt和钯Pd的摩尔数的和的比率约为 。 50％〜约 80％。 在上游NOx吸附还原催化剂上仅负载铂Pt。 根据该结构，即使向排气供给液体燃料，也可以从NOx吸附还原催化剂中有效地释放NOx，并且进一步降低NOx吸附还原催化剂在低温下吸附的NOx量。

    Exhaust purification device and exhaust purification method of internal combustion engine
    46.
    发明申请
    Exhaust purification device and exhaust purification method of internal combustion engine 有权
    内燃机排气净化装置及排气净化方法

    公开(公告)号：US20060037312A1

    公开(公告)日：2006-02-23

    申请号：US10537748

    申请日：2004-10-04

    申请人： Kohei Yoshida ,  Shinya Hirota ,  Takamitsu Asanuma ,  Yasuaki Nakano ,  Shunsuke Toshioka

    发明人： Kohei Yoshida ,  Shinya Hirota ,  Takamitsu Asanuma ,  Yasuaki Nakano ,  Shunsuke Toshioka

    IPC分类号： F01N3/00 ,  F01N3/10

    CPC分类号： F02D41/0275 ,  B01D53/9481 ,  B01D53/9495 ,  F01N3/0842 ,  F01N3/0871 ,  F01N2610/03 ,  F02B37/00 ,  F02D41/024 ,  F02D2200/0802 ,  F02D2200/0806 ,  Y02A50/2345 ,  Y02T10/26

    摘要： A NOx storing catalyst (11) comprising a precious metal catalyst (46) and NOx absorbent (47) is arranged in an exhaust passage. When the air-fuel ratio of the exhaust gas is lean, the storing catalyst cold stores the NO2 contained in the exhaust in the absorbent when the catalyst is inactive and hot stores the cold stored NO2 in the absorbent when the catalyst is made active. The NO2 contained in the exhaust is cold stored in the absorbent when the catalyst is not activated, and when a predetermined NOx storing catalyst restoring condition (107) is met, a NOx storing catalyst restoring control (109, 115) including raising the NOx storing catalyst temperature to a predetermined temperature to active it (109) is executed so as to restore the cold storing capability of the NOx absorbent.

    摘要翻译： 包含贵金属催化剂（46）和NO x吸收剂（47）的NO x x存储催化剂（11）布置在排气通道中。 当废气的空燃比为稀时，当催化剂不活动时，储存催化剂冷存储在吸收剂中排气中的NO 2，并且热存储冷存储的NO 当催化剂活化时，在吸收剂中。 当催化剂未被活化时，排气中含有的NO 2 2被冷藏在吸收剂中，并且当满足预定的存储催化剂还原条件（107）时， 执行包括使存储催化剂温度升高到预定温度以使其活化（109）的存储催化剂恢复控制（109,115）的NO X ，以便恢复 NO x吸收剂的冷藏能力。

    EXHAUST PURIFICATION SYSTEM OF INTERNAL COMBUSTION ENGINE
    50.
    发明申请
    EXHAUST PURIFICATION SYSTEM OF INTERNAL COMBUSTION ENGINE 有权
    内燃机排气净化系统

    公开(公告)号：US20110209462A1

    公开(公告)日：2011-09-01

    申请号：US12673888

    申请日：2009-06-15

    申请人： Takamitsu Asanuma ,  Kohei Yoshida ,  Hiromasa Nishioka ,  Daichi Imai ,  Kazuhiro Umemoto

    发明人： Takamitsu Asanuma ,  Kohei Yoshida ,  Hiromasa Nishioka ,  Daichi Imai ,  Kazuhiro Umemoto

    IPC分类号： F01N3/10 ,  F01N3/20

    CPC分类号： F01N3/0871 ,  B01D53/9409 ,  B01D2251/208 ,  B01D2255/91 ,  B01D2257/402 ,  B01D2257/404 ,  B01D2258/012 ,  F01N3/0828 ,  F01N3/36 ,  F01N2570/145 ,  F01N2610/03 ,  Y02A50/2344 ,  Y02C20/10 ,  Y02T10/20

    摘要： In an exhaust purification system of an internal combustion engine, comprising a NOX catalyst device, which can satisfactorily store NOX in the exhaust gas when the concentration of oxygen in the exhaust gas is high and can release the stored NOX and purify the released NOX to N2 by reducing materials in the exhaust gas when the concentration of oxygen is decreased as a regeneration treatment, the regeneration treatment is carried out to change a combustion air-fuel ratio from a lean air-fuel ratio to a set rich air-fuel ratio, and N2O reducing material is supplied to the NOX catalyst device during at least one of a first period set within a period in which an air-fuel ratio in the exhaust gas within said NOX catalyst device changes from the lean air-fuel ratio to the set rich air-fuel ratio when the regeneration treatment is started and a second period set within a period after an air-fuel ratio in the exhaust gas within the NOX catalyst device becomes the stoichiometric air-fuel ratio when the regeneration treatment is finished.

    摘要翻译： 在内燃机的排气净化系统中，包括NO x催化剂装置，当废气中的氧浓度高时能够令人满意地将NO x储存在排气中，能够释放储存的NO x并将释放的NO x净化为N2 当通过再生处理使氧气浓度降低时，通过减少废气中的材料，进行再生处理，以将燃烧空燃比从稀空燃比变为浓空燃比，并且 在所述NO x催化剂装置内的排​​气中的空燃比从所述稀空燃比变为所述浓空燃比的期间内设定的第一期间中的至少一个中，向所述NO x催化剂装置供给N 2 O还原材料 当再生处理开始时的空燃比和在NO x催化剂装置内的排​​气中的空燃比后的期间内设定的第二期间成为理论空燃比 o当再生处理完成时。