Filter for filtering particulate matter from exhaust gas emitted from a positive ignition engine

Filter for filtering particulate matter from exhaust gas emitted from a positive ignition engine

  • CN 102,333,579 A
  • Filed: 02/26/2010
  • Published: 01/25/2012
  • Est. Priority Date: 02/26/2009
  • Status: Active Application
First Claim
Patent Images

1. be used for from the filter of the tail gas filtering particulate matter (PM) of positive ignition engine discharge;

  • This filter comprises the porous matrix with input surface and output surface;

    Separate with the involved a plurality of loose structures with hole of first average pore size of said output surface on wherein said input surface;

    Wherein said porous matrix is coated with the washcoated layer that comprises a plurality of solid particles;

    The wherein said loose structure that scribbles the porous matrix of washcoated layer comprises a plurality of holes with second average pore size, and said second average pore size is less than said first average pore size.

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