Comparative Study of Blending N-Haxane and Di-Ethyl Ether (DEE) on Ignition Delay of Diesel Engine

Compression ignition engines have high thermodynamic efficiency therefore they have always been the first choice for heavy duty vehicles. However, future emission regulation poses a challenge for upcoming diesel engine combustion systems. Future emission regulations are becoming more restrictive, forcing engine designers towards lower exhaust emissions and better performance. The analysis is focused on direct injection Diesel engines, where the fuel-air mixing process plays a dominant role on engine performance. Only with a good understanding of these phenomena it will be possible to reduce the emission levels without impairing the engine performance and efficiency. all the four blends of hexane have higher value of ignition delay than the pure diesel for the entire range of temperature and also various pressures (10, 15, 20 and 25 bar). the variation of ignition delay for the Hexane blended diesel fuel with air temperature being varied from 583-663 K. The effect of percentage of n-hexane blends shows as increasing the percentage of n-hexane blends the ignition delay is also increased for pressure 10 to 25 bar. the variation of ignition delay of 20% and 30% DEE blends is much higher than the 10% and 20% DEE blends or 30% and 40% of DEE blends. In this case the percentages of blends of DEE is increases the ignition delay is decreased while the result is opposite in the n-hexane blends.