AEXPERIMENTAL STUDY FOR OPTIMUM FUEL INJECTION PRESSURE ON DIESEL ENGINE PERFORMANCE WITH WHEAT GERM OIL
Keywords:
wheat germ oil, Diesel engines performance, fuel injection pressure, UHC- Unburned hydro carbons, CO- Carbon monoxide, NOx emissions.Abstract
Efforts are being made throughout the world to reduce consumption of liquid petroleum fuels wherever it is possible. Bio-diesel is recently gaining much prominence in a substitute for petroleum based diesel mainly due to environmental considerations and depletion of vital resources like petroleum and coal. The vegetable oils are the promising alternative among the different diesel fuel alternatives. For complete combustion of the fuel in the cylinder the fuel injection parameters play a major role. The major parameters are mainly fuel nozzle holes, fuel droplet size and fuel injection pressure. These parameters can influence the engine performance and emission characteristics of an I.C. engine. In this work, experimental study was carried out tests used a blend of wheat germ oil and diesel in a single cylinder, 4- stroke water cooled light duty injection diesel engine at different injection pressures 175, 185 and 195 Bar. The tests were carried out for pure diesel and blend of 20 % wheat germ oil by volume in diesel at constant speed with varied loads. The performance results at 185 to 195 Bar of blend very nearer to pure diesel results. The emissions UHC, CO and CO2 are very less at 185 Bar compared to pure diesel. The NOx emissions are lesser for blend at 195 Bar than pure diesel. The overall performance is good at 185 and 195 Bar. But the emissions are decreased when increasing injections pressure.
