EFFECT OF TEFLON BASED ADDITIVE ON NEW LUBRICANTS IN A TURBOCHARGED FOUR STROKE INSULATED DI DIESEL ENGINE WITH ALCOHOL AS A FUEL
S. Sunil Kumar Reddy1 , Dr.V. Pandurangadu2
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With the depletion and pollution of diesel fuels, researchers are concentrating much for the development of renewable alternative fuels for the existing diesel engines. Among all alcohols are found to be best because they are produced from sugarcane and are renewable in nature. But due to the properties of alcohol fuel, it is difficult to blaze them in the existing diesel engines. So, an insulated engine is developed with the insulation of the important engine components, which reduces the ignition delays and improves the thermal efficiency. In the present work experiments are conducted with brass piston insert with maximum number of grooves on the piston which generates higher temperatures in the combustion chamber. This plunge the volumetric efficiency and more increases the frictional horse power owing to thinning of lubricants. Therefore this drop is compensated by turbocharging. Further in order to withstand for higher temperatures in the engine, new lubricants are developed. These lubricants are blended with different percentages of Teflon based additives (TBA) and analyzed the frictional losses to find the best performed oil. Tests are conducted on a single cylinder 4-stroke, water-cooled 3.68 KW Kirloskar diesel engine with 165 bar fuel injection pressure with alcohol as a fuel.