中速ディーゼル機関の燃焼に関する研究

概要

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It is quite important to have a clear understanding of the air motion within the combustion chamber and resultant fuel spray pattern which have a large influence on the combustion in a direct injection diesel engine.<BR>In view of this, the authors conducted component tests, that is, steady-flow rig tests to investigate the characteristics of intake port which develops air motion in the combustion chamber and tests to observe the growth of fuel spray in a high-pressure vessel. The effects of intake port characteristics, combustion chamber shapes and fuel nozzle specifications on the specific fuel consumption and smoke were confirmed in engine tests, and were evaluated in relation to the results of component tests.<BR>Moreover, the trends of specific fuel consumption and smoke were predicted by using a combustion model.<BR>As a result, the authors could determine the effects of intake port characteristics, combustion chamber shapes and fuel nozzle specifications on the specific fuel consumption and smoke quantitatively to some degree. It was also corroborated that the results of qualitative prediction of specific fuel consumption and smoke show a good agreement with measured results.
社団法人日本マリンエンジニアリング学会の論文