Experimental Investigation of Effect of Fumigation on Diesel Engine Performance and Emissions-Review

Biodiesel is an alternative fuel for internal combustion engines. It can reduce carbon monoxide (CO), hydrocarbon (HC) and particulate matter (PM) emissions, compared with diesel fuel, but there is also an increase in nitrogen oxides (NOx) emission. This work is aimed to compare the effect of applying a biodiesel with either 10% blended ethanol or 20% fumigation ethanol. The biodiesel used in this study is converted from jatropha plant oil. Experiments performed on diesel engine. The effects of ethanol fumigation (i.e. the addition of ethanol to the intake air manifold) and ethanol± diesel fuel blends on the performance and emissions of a single cylinder diesel engine investigated experimentally and compared. An attempt made to determine the optimum percentage of ethanol that gives lower emissions and better performance at the same time. This was done by using a simple fumigation technique. The modification and testing of a compression ignition engine using diesel and ethanol as fuel has been carried out. Tests on the engine fuelled with diesel only were made, and the performance evaluated to form a basis for comparison for those of ethanol ± diesel dual fuelling. Modifications were made in the introduction of the ethanol and air. A carburetor was used to vaporize ethanol into the engine. The effect of preheating the intake ethanol ± air mixture was also investigated. Performance was evaluated in terms of engine horsepower, brake specific fuel consumption, brake thermal efficiency, the exhaust gas temperature, lubricating oil temperature and exhaust emissions.