Exhaust emission purification apparatus of compression ignition type internal combustion engine
    75.
    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。