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    Analytical study of pressure pulsation characteristics according to the geometries of the fuel rail of an MPI engine

    Analytical study of pressure pulsation characteristics according to the geometries of the fuel rail of an MPI engine


    Abstract In a conventional MPI engine, a pulsation damper is usually mounted on the fuel rail to diminish undesirable noise in the vehicle cabin room; however, pulsation dampers are quite expensive. Therefore, several studies have focused on reducing fuel pressure pulsation by increasing the self-damping characteristics of the fuel rail. This paper details the development of a fuel rail that reduces pulsation using a self-damping effect. Using an oil hammer simulation technique, pressure pulsation characteristics were investigated with respect to the aspect ratio of the cross-section, wall thickness, and fuel rail material. Increasing the aspect ratio and decreasing the wall thickness efficiently reduced the pressure pulsation. In addition, the pressure pulsation characteristics were investigated with respect to the resonant engine speed and injection period. These simulated data can be used to reduce the pressure pulsation peak and to avoid the resonant point in the design stage during the development of a fuel rail.

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    Title :

    Analytical study of pressure pulsation characteristics according to the geometries of the fuel rail of an MPI engine

    Contributors:
    Heo, H. S. (author) / Bae, S. J. (author) / Lee, H. K. (author) / Park, K. S. (author)
    Published in:

    International Journal of Automotive Technology ; 13 , 2 ; 167-173

    Publication date :

    2012-01-29

    Size :

    7 pages

    ISSN :

    1976-3832 , 1229-9138

    DOI :

    https://doi.org/10.1007/s12239-012-0014-7

    Type of media :

    Article (Journal)

    Type of material :

    Electronic Resource

    Language :

    English

    Keywords :

    Bulk modulus , Fuel rail , Injection period , Oil hammer , Pressure change period , Pressure pulsation , Pressure propagation speed Engineering , Automotive Engineering

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