A Tapered Element Oscillating Micro-balance (TEOM), consisting of a tapered tube fixed at the wide end with a filter element attached to the narrow end which is free to oscillate, can monitor diesel exhaust particulate by drawing a sample through the filter element. As particulate mass accumulates on the filter, a small change in the frequency of oscillation, directly related to mass, is detected in real-time. As described in this study TEOM sensitivity on the order of 5×10−8 g-sec−1 may be achieved over sample periods of 8-15 seconds. Two light duty diesel vehicles were tested using FTP-Bag III and NYCC driving schedules. For 29 vehicle tests, the mean ratio of total TEOM mass to simultaneously collected 47 mm filter samples was 0.96 (C.V. = 13%). Real-time TEOM data should prove valuable to particulate control technology efforts and environmental impact assessment.


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    Title :

    Real-Time Diesel Particulate Measurement Using A Tapered Element Oscillating Microbalance


    Additional title:

    Sae Technical Papers


    Contributors:
    Hill, B. (author) / Gibbs, R. (author) / Johnson, R. (author) / Jorgenson, R. (author) / Whitby, R. (author) / Shimpi, S. (author)

    Conference:

    SAE International Congress and Exposition ; 1982



    Publication date :

    1982-02-01




    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English




    Real-time Diesel particulate measurement using a tapered element oscillating microbalance

    Whitby,R. / Gibbs,R. / Johnson,R. et al. | Automotive engineering | 1982


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