Gasoline Distribution Measurements with PLIF in a SI Engine

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Abstract

<div class="htmlview paragraph">A laser induced fluorescence (LIF) technique to visualize the gasoline distribution in port injection spark ignition engines is presented. A dopant is selected according to a list of criteria required to make it a good tracer of the gasoline. This dopant, biacetyl, is shown to provide quantitative measurement in relative value. The LIF technique is applied for two-dimensional laser sheet imaging in a model engine with optical access. Extensive data processing is developped and used for a quantitative characterization of the mixing level. The effect of compression, injection timing, engine speed, and type of flow field on the mixture homogeneity is investigated.</div>

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