An Investigation On The Production Of Emulsified Fuel And Its Effect On Fuel Economy And Emissions Of Single Cylinder Diesel

Due to the shortage of oil resource and pollution of the environment, substitutive fuels become an effective method for solving those problems.The aim of this research is to decrease fuel consumption and lessen NOx and particulates by using emulsified fuel in diesel. The mechanism of fuel saving and emission reduction were discussed in this paper. Based on surface chemistry, proper emulsifiers were selected to produce stable emulsified diesel oil, which contains different amount of water. The characters of emulsified fuel such as viscosity, heat value and factors in connect with stability were analyzed.In order to know the results of fuel consumption and emission by using emulsified fuel in diesel, the experimental results of SI95 diesel engine by using pure diesel oil and different emulsified fuels were analyzed. The results showed that when using emulsified fuel, fuel economy was improved. When the water dose was 20% and engine speed was 2000r/min, the maximum fuel saving was 4.1%; the thermal efficiency of emulsified fuels was higher than that of using pure diesel oil. NOX and particulates emissions were reduced greatly by using emulsified fuels. When water dose was 20% and engine speed was 1500 r/min, the maximum NOX reduction was 43.4%; The average of particulates under all loads was reduced by the extent of 46%~64%. The more water dose, the better results. However, compared with using pure diesel oil, THC and CO emissions were increased when using emulsified fuel.From the results we can conclude that emulsified fuel can reduce emissions and save fuel, thus it will have good prospect.