피스톤 온도저감 방안과 그 효과에 관한 연구

The effect of spray jet and gallery cooling were studied in 3 types of engines, gasoline engine, direct injection diesel engine and indirect injection diesel engine, by measuring piston temperatures with and without cooling devices, spray jet and cooling gallery. As a result of the measurement, it is shown that the cooling effect of spray jet of gasoline engine is larger than that of diesel engine and the effect of cooling gallery of indirect injection diesel engine is larger than that of direct injection diesel engine. The different characteristics of piston design according to the engine types makes the cooling effect different from each other. Therefore, the characteristics of piston design should be considered when determining the most appropriate piston cooling method.