Exhaust emission purification apparatus of compression ignition type internal combustion engine
    51.
    发明申请

    公开(公告)号:US20060053778A1

    公开(公告)日:2006-03-16

    申请号:US10542595

    申请日:2004-11-29

    IPC分类号: F01N3/00 F01N3/10

    摘要: A fuel adding valve (14), an HC adsorbing and oxidation catalyst (11), and a NOx storing catalyst (12) are successively arranged in an exhaust passage of an internal combustion engine toward the downstream side. When the NOx storing catalyst (12) should release NOx, particulate fuel is added from the fuel adding valve (14). This fuel is adsorbed once at the HC adsorbing and oxidation catalyst (11), then gradually evaporates to make the air-fuel ratio of the exhaust gas flowing into the NOx storing catalyst (12) rich. Due to this, NOx is released from the NOx storing catalyst (12).

    摘要翻译: 燃料添加阀(14),HC吸附和氧化催化剂(11)以及NO x存储催化剂(12)依次排列在内燃机的排气通道中,朝向下游侧 。 当NO x X存储催化剂(12)释放NO x时,从燃料添加阀(14)中加入微粒燃料。 该燃料在HC吸附和氧化催化剂(11)上被吸附一次,然后逐渐蒸发,使得流入NO 2 x储存催化剂(12)的废气的空燃比变浓。 由此,NO NO x x从NO x存储催化剂(12)释放。

    Exhaust Gas Purification Apparatus For Internal Combustion Engine
    52.
    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

    IPC分类号: F01N3/20

    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 of compression ignition type internal combustion engine
    57.
    发明授权
    Exhaust purification device of compression ignition type internal combustion engine 有权
    压燃式内燃机排气净化装置

    公开(公告)号:US07703275B2

    公开(公告)日:2010-04-27

    申请号:US10542595

    申请日:2004-11-29

    IPC分类号: F01N3/00

    摘要: A fuel adding valve (14), an HC adsorbing and oxidation catalyst (11), and a NOx storing catalyst (12) are successively arranged in an exhaust passage of an internal combustion engine toward the downstream side. When the NOx storing catalyst (12) should release NOx, particulate fuel is added from the fuel adding valve (14). This fuel is adsorbed once at the HC adsorbing and oxidation catalyst (11), then gradually evaporates to make the air-fuel ratio of the exhaust gas flowing into the NOx storing catalyst (12) rich. Due to this, NOx is released from the NOx storing catalyst (12).

    摘要翻译: 燃料添加阀(14),HC吸附和氧化催化剂(11)和NOx储存催化剂(12)在内燃机的排气通道中朝向下游侧依次排列。 当NOx吸留催化剂(12)释放NOx时,从燃料添加阀(14)中加入微粒燃料。 该燃料在HC吸附和氧化催化剂(11)处吸附一次,然后逐渐蒸发,使得流入NOx吸留催化剂(12)的废气的空燃比变浓。 由此,从NOx吸留催化剂(12)释放NOx。