This paper dea ユ s with eXperimental analysis of gas fuel injection by schheren method . In case of fuel direct inlection is apPhed to a two ' stroke engine , the thlle from injection to ignition is extremely shorter than iII a 旧 ourstroke engine , and the time is about 1! 6 in comparison with fourstroke engi le , Therefore , grasping the diffusion and whereabouts of 血 jected gas fuel is important for the to form ve ry suitable mix も ure arQund ignition plug . In this study , the purpose is

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... ysis by schlieren 皿 ethod using methane gas as supposing the natural gas fuel direct injectio ロ . AS a result , we could observe effective diffusion to make homogeneous mix 匕 ure or str 且 tified combustion .