Exhaust purification system of internal combustion engine
    1.
    发明授权
    Exhaust purification system of internal combustion engine 有权
    内燃机排气净化系统

    公开(公告)号:US08955313B2

    公开(公告)日:2015-02-17

    申请号:US13379467

    申请日:2011-02-18

    摘要: An exhaust purification system of an internal combustion engine, which includes: a silver-alumina-based catalyst, which is arranged in an engine exhaust system and, when an air-fuel ratio of exhaust gas is leaner than a stoichiometric air-fuel ratio, releases adsorbed NO2 at a first set temperature and adsorbed NO at a second set temperature, a secondary air feed passage configured to suppress a temperature rise of the silver-alumina-based catalyst; and an electronic control unit, that: controls the air flow through the secondary air feed passage to: when the silver-alumina-based catalyst has reached a third set temperature, suppress a temperature rise of the silver-alumina-based catalyst to maintain the silver-alumina-based catalyst near the third set temperature, and then lift the suppression of the temperature rise of the silver-alumina-based catalyst so that at least part of the NO adsorbed at the silver-alumina-based catalyst, is oxidized to NO2 to be adsorbed at the silver-alumina-based catalyst.

    摘要翻译: 一种内燃机的排气净化系统,其特征在于,包括:发动机排气系统中的银 - 氧化铝系催化剂,当排气的空燃比比化学计量空燃比稀的时, 在第一设定温度下释放吸附的NO 2并在第二设定温度下吸附NO;二次空气供给通道,其构造成抑制银 - 氧化铝基催化剂的升温; 以及电子控制单元,其控制通过二次空气供给通道的空气流:当所述银 - 氧化铝基催化剂达到第三设定温度时,抑制所述银 - 氧化铝基催化剂的温度上升以维持 银 - 氧化铝基催化剂接近第三设定温度,然后提升抑制银 - 氧化铝基催化剂的升温,使得在银 - 氧化铝基催化剂上吸附的至少一部分NO被氧化成 NO 2被吸附在银 - 氧化铝基催化剂上。

    EXHAUST PURIFICATION SYSTEM OF INTERNAL COMBUSTION ENGINE
    10.
    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:US20130323130A1

    公开(公告)日:2013-12-05

    申请号:US13379467

    申请日:2011-02-18

    IPC分类号: F01N3/08

    摘要: An exhaust purification system in which when an air-fuel ratio of exhaust gas is leaner than a stoichiometric air-fuel ratio, a silver-alumina-based catalyst device releases adsorbed NO2 at a first set temperature and releases adsorbed NO at a second set temperature which is lower than the first set temperature. When the air-fuel ratio of the exhaust gas is leaner than the stoichiometric air-fuel ratio and the silver-alumina-based catalyst device is a third set temperature which is lower than the second set temperature, a temperature rise of the silver-alumina-based catalyst device is suppressed to maintain the silver-alumina-based catalyst device near the third set temperature, and at least part of the NO which is adsorbed at the silver-alumina-based catalyst device is oxidized to NO2 to be adsorbed at the silver-alumina-based catalyst device, then the suppression of the temperature rise of the silver-alumina-based catalyst device is lifted.

    摘要翻译: 一种排气净化系统,其中当排气的空燃比比化学计量空燃比更稀的时,银 - 氧化铝基催化剂装置在第一设定温度下释放吸附的NO 2,并在第二设定温度下释放吸附的NO 低于第一设定温度。 当排气的空燃比比化学计量空燃比稀的时,银 - 氧化铝系催化剂装置为比第二设定温度低的第三设定温度时,银 - 氧化铝的升温 的催化剂装置被抑制以将银 - 氧化铝基催化剂装置保持在第三设定温度附近,并且吸附在银 - 氧化铝基催化剂装置上的至少一部分NO被氧化成NO 2以被吸附在 银 - 氧化铝基催化剂装置,则提升了银 - 氧化铝基催化剂装置的温度升高抑制。