Exhaust purification device of compression ignition type internal combustion engine
    1.
    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。

    Exhaust emission purification apparatus of compression ignition type internal combustion engine
    3.
    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 purification device and exhaust purification method of internal combustion engine
    6.
    发明授权
    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:US07685812B2

    公开(公告)日:2010-03-30

    申请号:US10537748

    申请日:2004-10-04

    IPC分类号: F01N3/00

    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NOx吸收剂(47)的NOx储存催化剂(11)布置在排气通道中。 当排气的空燃比为稀时,当催化剂不活动时,储存催化剂冷存储在吸收剂中的排气中的NO 2,并且当催化剂活化时,将热的储存的NO 2储存在吸收剂中。 当催化剂未被活化时,排气中含有的NO2被冷藏在吸收剂中,并且当满足预定的NOx储存催化剂恢复条件(107)时,存储催化剂复原控制(109,115)包括提高NOx储存 催化剂温度达到预定温度以使其活化(109),以恢复NOx吸收剂的冷藏能力。