Motivated by the possibility of future emission regulations based on particle number as well as mass, after-treatment of ultrafine particles by a cordierite wallflow filter has been investigated. In a laboratory simulation, synthetic carbon particles of known size and concentration in air were captured with number-based efficiency exceeding 70% in the 20–100 nm size range. Effects of temperature, up to 400°C, filter loading time and ambient-temperature sample dilution have been quantified. Steady-speed and European drive cycle results for the same filter fitted to a passenger car with gasoline direct-injection engine have shown promising reductions in emissions, except at the highest speed of the cycle.


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    Title :

    Experimental Evaluation of a Wall-Flow Filter for Gasoline Engine Particulate Emission Control


    Additional title:

    Sae Technical Papers


    Contributors:

    Conference:

    2001 Internal Combustion Engines ; 2001



    Publication date :

    2001-09-23




    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English




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