Mixture Strength Measurements in the Combustion Chamber of SI Engine via Rayleigh Scattering : Ensemble-Averaged Mean Concentration and Cyclic Variation of Temporal Mean Concentration near the Spark Plug
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概要
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Laser Rayleigh scattering was applied for remote, nonintrusive point probing of the vapor concentration and its fluctuation near the spark plug of a motored spark ignition engine, which was caused by the intermittent injection of Freon-12 vapor into an intake port. The theoretical analysis showed that the instantaneous fuel vapor concentration can be split into three components : the ensemble-averaged mean concentration, the cyclic variation of temporal mean concentration and the temporal concentration fluctuation in a specific cycle. This paper concentrates on the measurements of the ensemble-averaged mean concentration and the cyclic variation of temporal mean concentration. The results show that both the ensemble-averaged mean concentration and the cyclic variation of temporal mean concentration increase and reach a peak, after which they decrease during the intake and compression strokes. Moreover, they are strongly affected by air-fuel ratio, engine speed, injection duration and injection timing.
- 一般社団法人日本機械学会の論文
- 1994-02-15
著者
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Kadota T
Department Of Mechanical Engineering Osaka Prefecture University
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Kadota Toshikazu
Department Of Mechanical Engineering Hioshima University
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Zhao F‐q
Department Of Mechanical Engineering Hiroshima University
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Zhao Fu-quan
Department Of Mechanical Engineering Hiroshima University
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Takemoto Tooru
Department of Mechanical Engineering, Hiroshima University
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Takemoto Tooru
Department Of Mechanical Engineering Hiroshima University
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