Experimental studies on performance emission and combustion characteristics of biodiesel with additives in a vcr diesel engine

Abstract

Diesel engine was invented over a century ago and its usage all over the world has been increasing now in a remarkable manner because of its efficiency with respect to fuel consumption power output and harmless exhaust fumes The main challenges related to the growth of diesel engine usage include depletion of fossil fuels and increasing strict emission norms Alternative fuels addition of fuel additives alteration in fuel injection pressure and modification in compression ratio are some of the methods adopted to improve performance and reduce emission in diesel engines In India non edible oils such as Jatropha Karanja Mahua and Neem are easily available in the market Among different non-edible vegetable oils Karanja oil is a promising alternative fuel for diesel engine which is available in large quantity in Tamil Nadu and only few studies are available to them However there is a major disadvantage in the use of biodiesel blends as they have lower heating value and higher density viscosity fuel consumption and NOX emission which limit their application In these fuel additives become essential tools to minimize these drawbacks and to cater for the reduced fuel consumption and emissions Different types of additives are used in automotive biodiesel fuel to meet specification limits and to enhance the quality Therefore in order to find the appropriate fuel additives in the combustion applications more experiments are needed to explore different mechanisms Similarly the efficiency of blends is dependent mainly on compression ratio and injection pressure of diesel engines This paves the way for investigation of blends with varying compression ratio and injection pressure is needed newline