ガソリンエンジン用点火プラグにおける流動により延伸した火花放電の直径に関する考察

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  • ガソリンエンジンヨウ テンカ プラグ ニ オケル リュウドウ ニ ヨリ エンシン シタ ヒバナ ホウデン ノ チョッケイ ニ カンスル コウサツ

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From the global CO2 reduction trend, improvement in thermal efficiency is required for the powertrain of automobiles. A promising direction for gasoline engine is lean burn. In the lean burn, since the laminar burning velocity decreases, the turbulent flow is intensified to shorten the burning time. Stable ignition in the high velocity and turbulent flow is required in combination with the advance ignition timing. At this time, since the discharge path at the spark plug gap is elongated by the flow and it is assumed that the elongation of the discharge path affects the behavior of the ignition to flame propagation, it is important to understand the phenomena and to model the effect of such discharge path elongation on the ignition behavior. From this background, the discharge characteristics at spark plug gap in the flow were investigated using a small wind tunnel. The deformation of the discharge path in the flow was observed using a high-speed camera, and the current and voltage at the spark plug were measured. The relationship between them was investigated and compared with previous works. Especially in this report, the relations between the electric current and diameter of discharge path were discussed analytically.

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  • 静電気学会誌

    静電気学会誌 43 (1), 26-31, 2020

    一般社団法人静電気学会

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