火花点火機関燃焼室内における燃料液滴の挙動 : 第2報,モータリング時の液滴直径測定

概要

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An experimental study was made of droplet behavior in the combustion chamber of an automotive spark ignition engine with multipoint fuel injection. The laser Mie scattering technique was applied for time-resolved measurements of the size of the liquid droplets in the combustion chamber which were caused by the intermittent injection of unleaded regular gasoline into an intake port during the intake stroke of the motored engine. In order to make the optical diagnostics accessible, the original engine was modified to permit installation of an extended transparent combustion cylinder and a piston. The results showed that the temporal variation of the droplet size during intake and compression strokes was slight. It was also found that the droplet size decreased with an increase in the intake valve temperature. Both engine speed and fuel injection timing did not have an appreciable effect on the drolet size within the range of experimental conditions.
一般社団法人日本機械学会の論文
1989-05-25