Gasoline Engine Emissions Treatment Systems Having Particulate Filters
    4.
    发明申请
    Gasoline Engine Emissions Treatment Systems Having Particulate Filters 有权
    具有颗粒过滤器的汽油发动机排放处理系统

    公开(公告)号:US20110252773A1

    公开(公告)日:2011-10-20

    申请号:US13087497

    申请日:2011-04-15

    IPC分类号: F01N3/035 B01D53/94

    摘要: Provided are exhaust systems and components suitable for use in conjunction with gasoline engines to capture particulates in addition to reducing gaseous emission such as hydrocarbons, nitrogen oxides, and carbon monoxides. Exhaust treatment systems comprising a three-way conversion (TWC) catalyst located on a particulate filters are provided. Coated particle filters having washcoat loadings in the range of 1 to 4 g/ft3 result in minimal impact on back pressure while simultaneously providing TWC catalytic activity and particle trapping functionality to meet increasingly stringent regulations such as Euro 6. Sufficient to high levels of oxygen storage components (OSC) are also delivered on and/or within the filter. The filters can have a coated porosity that is substantially the same as its uncoated porosity. The TWC catalytic material can comprise a particle size distribution such that a first set of particles has a first d90 particle size of 7.5 μm or less and a second set of particles has a second d90 particle size of more than 7.5 μm. Methods of making and using the same are also provided.

    摘要翻译: 提供了适于与汽油发动机结合使用的排气系统和部件,以除了还原气体排放物之外还捕获微粒,例如烃,氮氧化物和一氧化碳。 提供了包括位于微粒过滤器上的三元转化(TWC)催化剂的排气处理系统。 具有1至4g / ft 3范围内的洗涂层负载的涂覆颗粒过滤器对背压产生的影响最小,同时提供TWC催化活性和颗粒捕集功能,以满足越来越严格的规定,如欧6。足够高的氧气储存量 组件(OSC)也在过滤器上和/或内部传送。 过滤器可以具有与其未涂覆的孔隙度基本相同的涂层孔隙率。 TWC催化材料可以包括粒度分布,使得第一组颗粒具有7.5μm或更小的第一d90粒度,并且第二组颗粒具有大于7.5μm的第二d90粒度。 还提供了制备和使用它们的方法。