Performance and Emission Characteristics of Diesel Engine Using Rice Bran Oil with Titanium Oxide Piston Coating at Different Pressure

In recent years, the usage of vehicles has been increased and this leads to the demand for fossil fuels. It has become an urgent nee d to carry out the research work on alternate source of energy to reduce the demand of fossil fuels and also to reduce the emission. Biofuel is one of the alternative sources of energy. Bio -fuel is a clean burning fuel made from natural renewable energy re source; it operates on IC engine similar to the petroleum diesel. The rising cost of diesel and the danger caused to the environment has led to an intensive and desperate search for alternative fuels. The aim of the paper is to blend the camphor oil with diesel fuel at various pr oportions by volume. The Rice bran oil is directly blended with diesel fuel without any trans -esterification process, because of its low viscous property. A 4 -stroke, single cylinder, constant speed, direct injection diesel engine was operated on rice bran oil -biodiesel of different blends. Four different blends of 20, 40, 60 and 80 % by volume were used for this study. Various engine performance, combustion and emission parameters such as Brake Thermal Efficiency, Brake Specific Fu el Consumption, Exhaust Gas Temperature, etc. were recorded from the acquired data. To minimize these losses the combustion chamber Piston crown is coated with ceramic materials without changing the original dimensions. Tests were conducted and compar ison is done between coated and uncoated engines. Many authors/researchers have made one step ahead by using bio -diesel or by altering the injection timing. Their results have showed improved engine performance and emission characteristics. Titanium and Al umina is considered to be the most suitable material for ceramic coating. Plasma spray coating is widely accepted technique.