High-speed diagnostics capable of accurately resolving emission transients are required to provide the most detailed understanding and optimization of active exhaust-emissions-treatment processes, such as NOX adsorbers. A portable, mass-spectrometry-based instrument with high temporal resolution, linear response and broad dynamic range is described. This instrument provides transient-concentration measurement capability for many relevant exhaust species including total NOX. In applications for evaluation of NOX-adsorber systems using heavy-duty diesel engines, the instrument revealed relevant emission transients not previously resolved with conventional analyzers. Specifically, the instrument resolved transient emissions associated with the competition between desorption and reduction rates. The temporal resolution of the instruments is sufficient to resolve kinetic rates of the NOX-adsorber system.


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    Titel :

    Time-Resolved Measurements of Emission Transients By Mass Spectrometry


    Weitere Titelangaben:

    Sae Technical Papers



    Kongress:

    International Fuels & Lubricants Meeting & Exposition ; 2000



    Erscheinungsdatum :

    2000-10-16




    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Print


    Sprache :

    Englisch


    Schlagwörter :


    Time-resolved measurements of emission transients by mass spectrometry

    Partridge,W.P. / Storey,J.M. / Lewis,S.A.,,Smithwick,R.W. et al. | Kraftfahrwesen | 2000


    2000-01-2952 Time-Resolved Measurements of Emission Transients by Mass Spectrometry

    Partridge, W. P. / Storey, J. M. E. / Lewis, S. A. et al. | British Library Conference Proceedings | 2000


    A method for determining species mass fractions from spectrally resolved emission measurements

    Fletcher, Douglas / Raiche, George / Prabhu, Dinesh | AIAA | 2000