The need for gasoline particulate filter (GPF) technology is expected to grow with increasingly tight particle emissions standards being implemented in US, EU, China and elsewhere. Derived from the successful experience with diesel particulate filters (DPF), GPFs adopted the characteristic alternately plugged honeycomb structure that provides a large area of porous cordierite wall for filtering particles with minimal additional backpressure. However, unlike DPFs, continuous soot regeneration in GPFs makes it difficult to grow and sustain the soot cake on the filter wall that gives DPFs their high filtration efficiency. Therefore, filtration performance of low mileage GPFs relies heavily on the porous structure of filter media, which depends on both the substrate and the applied washcoat. In this work, a blank, two fresh washcoated filters and two washcoated filters with 3000 km mileage accumulation were characterized to compare their filtration performance. Particle number and mass filtration efficiency and pressure losses of filters with and without soot loading were measured on an aerosol test bench, and the results are compared with findings from engine dynamometer tests. Compared with blank filters, washcoated filters in this study generally had lower filtration efficiency and higher backpressure when clean, but efficiency increased when loaded with small amounts of soot (~20 mg/L or less). Ash collected during mileage accumulation improved the efficiency significantly, with only a mild backpressure increase. The mechanisms leading to the observed trends in filtration efficiency and backpressure are discussed.


    Zugriff

    Zugriff prüfen

    Verfügbarkeit in meiner Bibliothek prüfen

    Bestellung bei Subito €


    Exportieren, teilen und zitieren



    Titel :

    Gasoline Particulate Filter Efficiency and Backpressure at Very Low Mileage


    Weitere Titelangaben:

    Sae Technical Papers


    Beteiligte:
    Lambert, Christine (Autor:in) / Maricq, Matti (Autor:in) / Chanko, Timothy (Autor:in) / Liu, Xin (Autor:in)

    Kongress:

    WCX World Congress Experience ; 2018



    Erscheinungsdatum :

    03.04.2018




    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Print


    Sprache :

    Englisch




    Gasoline Particulate Filter Efficiency and Backpressure at Very Low Mileage

    Liu, Xin / Chanko, Timothy / Lambert, Christine et al. | British Library Conference Proceedings | 2018


    Diesel particulate filter (DPF) backpressure sensor as altitude sensor

    GOODSELL JAMES / KELLY ADAM B | Europäisches Patentamt | 2023

    Freier Zugriff

    GASOLINE MILEAGE - GOOD, BAD or INDIFFERENT

    Haynes, A. L. / White, H. S. / Enoch, O. | SAE Technical Papers | 1953


    Good gasoline mileage is team project

    Blomquist, O.J. | Engineering Index Backfile | 1965


    Weeding out poor performers raises gasoline mileage

    Bretell, C. | Engineering Index Backfile | 1928