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首页> 外国专利> filter for filtering particulate matter from exhaust gas emitted from a positive ignition engine, exhaust system for positive ignition engine, positive ignition engine, and method of capturing particulate matter from exhaust gas emitted from a positive ignition engine a positive ignition engine.

filter for filtering particulate matter from exhaust gas emitted from a positive ignition engine, exhaust system for positive ignition engine, positive ignition engine, and method of capturing particulate matter from exhaust gas emitted from a positive ignition engine a positive ignition engine.

机译：用于从正点火发动机排放的废气中过滤颗粒物的过滤器，用于正点火发动机的排气系统，正点火发动机以及从正点火发动机和正点火发动机排放的废气中捕获颗粒物的方法。

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摘要

A filter for filtering particulate matter (PM) from exhaust gas emitted from a positive ignition engine comprises a porous substrate having inlet surfaces and outlet surfaces, wherein the inlet surfaces are separated from the outlet surfaces by a porous structure containing pores of a first mean pore size, wherein the porous substrate is coated with a catalytic surface washcoat layer comprising a plurality of solid particles, wherein the catalytic surface washcoat layer substantially covers surface pores of the porous structure, wherein the porous structure of the washcoated porous substrate contains pores of a second mean pore size provided by the catalytic surface washcoat layer, wherein the pores of the washcoated porous substrate are defined in part by spaces between the particles (interparticle pores) in the washcoat, wherein the second mean pore size is less than the first mean pore size and wherein the catalytic washcoat is a three-way catalyst comprising: platinum and rhodium; palladium and rhodium; or platinum, palladium and rhodium as active components supported on a high surface area oxide; and an oxygen storage component.
机译：用于从正点火发动机排放的废气中过滤颗粒物（PM）的过滤器包括具有入口表面和出口表面的多孔基底，其中入口表面通过包含第一平均孔的孔的多孔结构与出口表面分开。尺寸，其中所述多孔基材涂覆有包含多个固体颗粒的催化表面修补基面涂层，其中所述催化表面修补基面涂层基本覆盖所述多孔结构的表面孔，其中所述修补基面涂覆的多孔基材的多孔结构包含第二孔由催化表面修补基面涂层提供的平均孔径，其中修补基面涂层的多孔基材的孔部分地由修补基面涂层中的颗粒之间的间隔（颗粒间孔）限定，其中第二平均孔径小于第一平均孔径其中催化载体涂层是三元催化剂，其包含：铂和铑;和钯和铑或以铂，钯和铑为活性成分负载在高表面积氧化物上;或和储氧成分。

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