Experimental investigation on performance of a turbocharged DI diesel engine using isopropanol-diesel fuel blends

摘要

Experimental study was conducted to investigate the effects of using isopropanol-diesel fuel blends on the engine performance and exhaust emissions in an electronic control high-pressure common rail turbocharged direct injection diesel engine. Experiments have been performed for different isopropanol-diesel blends, kept at different blending proportions, P5 (P5 contains 5% isopropanol and 95% diesel fuel by v/v), P10, P15 and P20, at engine speed of 2000r/min and different loads. The performance, combustion and emission characteristics observed while using blended fuels were analysed and compared with that of pure diesel as fuel without adding isopropanol. The results show that the isopropanol addition can significantly improve smoke emissions. The THC and NO_x emissions increased except CO emissions. Isopropanol-diesel fuel blends provide little effect on the in-cylinder pressure and heat release rate at selected operating conditions. Brake specific fuel consumption of isopropanol-diesel fuel blends becomes higher than diesel fuel.