The presence of liquid fuel inside the engine cylinder is believed to be a strong contributor to the high levels of hydrocarbon emissions from spark ignition (SI) engines during the warm-up period. Quantifying and determining the fate of the liquid fuel that enters the cylinder is the first step in understanding the process of emissions formation. This work uses planar laser induced fluorescence (PLIF) to visualize the liquid fuel present in the cylinder. The fluorescing compounds in indolene, and mixtures of iso-octane with dopants of different boiling points (acetone and 3-pentanone) were used to trace the behavior of different volatility components.Images were taken of three different planes through the engine intersecting the intake valve region. A closed valve fuel injection strategy was used, as this is the strategy most commonly used in practice. Background subtraction and masking were both performed to reduce the effect of any spurious fluorescence. The images were analyzed on both a time and crank angle (CA) basis, showing the time of maximum liquid fuel present in the cylinder and the effect of engine events on the inflow of liquid fuel.The results show details of the liquid fuel distribution as it enters the engine as a function of crankangle degree, volatility and location in the cylinder. A. semi-quantitative analysis based on the integration of the image intensities provides additional information on the temporal distribution of the liquid fuel flow.


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    Titel :

    Liquid Fuel Visualization Using Laser-Induced Fluoresence During Cold Start


    Weitere Titelangaben:

    Sae Technical Papers


    Beteiligte:
    Dawson, Mark (Autor:in) / Hochgreb, Simone (Autor:in)

    Kongress:

    International Fall Fuels and Lubricants Meeting and Exposition ; 1998



    Erscheinungsdatum :

    19.10.1998




    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Print


    Sprache :

    Englisch




    Liquid Fuel Visualization Using Laser-Induced Fluorescence During Cold Start

    Dawson, M. / Hochgreb, S. / SAE | British Library Conference Proceedings | 1998


    Liquid fuel visualization using laser-induced fluorescence during cold start

    Dawson,M. / Hochgreb,S. / Massachusetts Inst.of Technology,Cambridge,US | Kraftfahrwesen | 1998


    LIF visualization of liquid fuel in the intake manifold during cold start

    Felton,P.G. / Kyritsis,D.C. / Fulcher,S.K. et al. | Kraftfahrwesen | 1995


    LIF Visualization of Liquid Fuel in the Intake Manifold During Cold Start

    Kyritsis, D. C. / Felton, P. G. / Fulcher, S. K. | SAE Technical Papers | 1995