Date of Publication :7th February 2017

Abstract: One of the greatest challenges of the 21st century is to solve the problem of depletion of fossil economy. In this era our environment is badly affected by the pollution of fossil fuel which led to introduce an alternative fuel for compression ignition engines. Biodiesel is receiving more attention as an alternate fuel to the diesel engine with no or fewer modification. Previous studies reported that the use of biodiesel in compression ignition engines leads to the reduction in Hydrocarbon (HC), Carbon Monoxide (CO) & PM emissions accompanying with increase in fuel consumption & Nitrogen Oxide (NOX). Exhaust Gas Recirculation (EGR) is one of the methods to reduce the NOX emitted by C.I. engines. NOX is formed in condition of higher flame temperature and high oxygen availability which is greatly reduced by the process of EGR.Experiments were conducted on a single cylinder, four strokes, Variable Compression Ratio (VCR), water cooled diesel engine at full load with provision for EGR. In this paper, the comparison of performance and emission characteristics on the C.I. engine when it is fueled with biodiesel and diesel with 0%, 5% and 10%EGR are shown. Experimentally has been proved that, 10% EGR with biodiesel blend have minimized NOX and improved performance

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