油点法による高速直射式ディーゼルエンジンの燃焼室内の空気流動の可視化

Abstract

D.I. diesel engine combustion is strongly influenced by air flow in the combustion chamber. Therefore, in order to improve diesel combustion, it is very important to realize the air flow in the chamber.In this study, Oil Dot Method was used to visualize the air flow in the piston cavity of the combustion chamber.It is cleared that there is an air velocity deviation in the cavity, cauesd by an air flow pattern generated during intake process, a cavity size and its position.From the above result, combustion tuning tests were carried out by a single cylinder engine and preferably good combustion was obtained finaly.