Experimental Investigations in a Locally Developed Insulated DI Diesel Engine with Newly Developed Lubricants with Paratone Additive

With the rapid depleting of fossil fuels and its pollution intensive research is going on for the alternative fuels which produce low emissions and are should be renewable. Due to the production of sugar cane in our country is more (alcohol is a byproduct in the production of sugar), alcohol is considered as a preferable replacement for the diesel. However due to alcohol high latent heat of vaporization the alcohols do not vaporize in the existing diesel engines. But can be ignited at higher temperatures combustion chamber. So in the present work a thermally insulated engine (IE) is developed in which the heat in the combustion chamber is more. This further reduces the ignition delay and aids combustion; further improves the thermal efficiency and reduces the emissions. Tests are conducted on a single cylinder 4-stroke, watercooled 3.68 KW Kirloskar diesel engine (after converting that into an Insulated engine). At the available fuel injection pressures, the alcohol will be injected more due to the low viscosity of alcohol. So the fuel injection pressure is reduced to 165 bar for the experimentation. With the high temperatures in the combustion chamber the available lubricants losses their viscosity and increases the frictional losses. So, in order to withstand for the higher temperatures new lubricants are developed with the base oils supplied by refineries. These newly developed lubricants are blended with different percentages of paratone additive and analyzed the frictional losses to find the best performed oil. Keywords-alcohol, ceramics, Insulated engine, lubricating oils, paratone.