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    Positive Ignition Engine and Exhaust System Comprising Catalysed Zone-Coated Filter Substrate
    1.
    发明申请
    Positive Ignition Engine and Exhaust System Comprising Catalysed Zone-Coated Filter Substrate 有权
    积极点火发动机和排气系统，包括催化区域涂层过滤器基材

    公开(公告)号：US20140322112A1

    公开(公告)日：2014-10-30

    申请号：US14259876

    申请日：2014-04-23

    申请人： Johnson Matthey Public Limited Company

    发明人： Philip Gerald BLAKEMAN ,  David Robert GREENWELL

    IPC分类号： F01N3/035 ,  B01D53/94

    CPC分类号： F01N3/035 ,  B01D46/24 ,  B01D53/34 ,  B01D53/9418 ,  B01D53/9431 ,  B01D53/944 ,  B01D53/9445 ,  B01D53/9472 ,  B01D2255/1021 ,  B01D2255/1023 ,  B01D2255/1025 ,  B01D2255/50 ,  B01D2255/9032 ,  B01D2255/908 ,  B01D2255/91 ,  B01D2255/9155 ,  B01D2258/012 ,  B01D2258/014 ,  B01J23/40 ,  B01J29/06 ,  B01J35/006 ,  B01J35/04 ,  F01N3/021 ,  F01N3/0222 ,  F01N3/0814 ,  F01N3/0821 ,  F01N3/0842 ,  F01N3/101 ,  F01N3/2066 ,  F01N13/009 ,  F01N13/0097 ,  F01N2330/06 ,  F01N2370/00 ,  F01N2510/0682 ,  Y02A50/2324 ,  Y02A50/2325 ,  Y02T10/22 ,  Y02T10/24

    摘要： A positive ignition engine comprising an exhaust system, which comprises a catalysed filter for filtering particulate matter from exhaust gas emitted from a positive ignition internal combustion engine, which filter comprising a porous substrate having a total substrate length and having inlet surfaces and outlet surfaces, wherein the inlet surfaces are separated from the outlet surfaces by a first porous structure containing pores of a first mean pore size, wherein the porous substrate is coated with a washcoat composition which is a NOx absorber catalyst washcoat composition comprising at least one precious metal; or a selective catalytic reduction (SCR) catalyst washcoat composition, wherein a second porous structure of the washcoated porous substrate contains pores of a second mean pore size, wherein the second mean pore size is less than the first mean pore size, which NOx absorber catalyst washcoat or SCR catalyst washcoat being axially arranged on the porous substrate as a first zone comprising the inlet surfaces of a first substrate length less than the total substrate length and a second zone comprising the outlet surfaces of a second substrate length less than the total substrate length, wherein the sum of the substrate length in the first zone and the substrate length in the second zone is ≧100%, wherein: (i) a washcoat loading in the first zone >second zone; or (ii) where the washcoat composition is a NOx absorber catalyst washcoat composition, both a washcoat loading and a total precious metal loading in the first zone >second zone, and wherein the first zone is disposed upstream of the second zone.

    摘要翻译： 一种积极点火发动机，包括排气系统，其包括催化过滤器，用于从正点火内燃机排出的废气中过滤颗粒物质，该过滤器包括具有总基板长度并具有入口表面和出口表面的多孔基材，其中 入口表面通过包含第一平均孔径的孔的第一多孔结构与出口表面分离，其中多孔基材涂覆有作为包含至少一种贵金属的NOx吸收剂催化剂修补基面涂料组合物的修补基面涂料组合物; 或选择性催化还原（SCR）催化剂修补基面涂料组合物，其中所述洗涂多孔基材的第二多孔结构含有第二平均孔径的孔，其中所述第二平均孔径小于所述第一平均孔径，所述NOx吸收剂催化剂 修饰基面涂层或SCR催化剂修补基面涂层作为第一区域轴向地布置在多孔基材上，第一区域包括第一基底长度小于总基底长度的入口表面，第二区域包括第二基底长度小于总底物长度的出口表面 其中第一区域中的基底长度和第二区域中的基底长度之和为≥100％，其中：（i）第一区域>第二区域中的修补基面涂层负载; 或（ii）所述修补基面涂料组合物是NOx吸收剂催化剂修补基面涂料组合物，在所述第一区域>第二区域中的修补基面涂层负载量和总贵金属负载量，并且其中所述第一区域设置在所述第二区域的上游。