The purpose of this study was compared the spray characteristics, combustion characteristics and emissions(NOx, CO, HC, smoke) of a typical fuel(100% Diesel,DME) and Diesel-DME blended fuel in a Constant Volume Chamber(CVC) and a single-cylinder DI di...
The purpose of this study was compared the spray characteristics, combustion characteristics and emissions(NOx, CO, HC, smoke) of a typical fuel(100% Diesel,DME) and Diesel-DME blended fuel in a Constant Volume Chamber(CVC) and a single-cylinder DI diesel engine. Spray characteristics were investigated about varied ambient pressure and fuel injection pressure using the common rail fuel injection system when the fuel mixture ratio is varied. the spray characteristic research parameters were spray shape, penetration length, and spray angle at seven hole injector. common types of injectors were used(Bosch). Two types of blended fuel by the mass fraction was used. The typical fuel(100% Diesel,DME) and The blended fuel by mixture ratio 95:5, 90:10 (Diesel:DME) were used. The Injection pressure was fixed by 70MPa when the ambient Pressure was varied 0,2.5 and 5MPa. The combustion experiments was conducted in single cylinder engine equipped with common rail. injection pressure is 700 bar at 1200 rpm. The amount of injected fuels is adjusted to obtain the fixed input calorie value as 972.2 J/cycle in order to compare with the fuel conditions.