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As we know from year to year the emission standards are become stringent due to Global Warming Effect. It is difficult for the developing countries like India to meet such stringent emission standards as it involves expensive technologies. In this crisis, there is a need to search for the costeffective methods to reduce emissions from IC engines. Previous research shows that Biodiesel fueled diesel engines emit less CO2, HC and Smoke emissions than Diesel fueled Engines. In this study, a dual biodiesel blend, mixture of two different kinds of biodiesel namely palm and jatropha with diesel was considered for evaluation in a single cylinder DI diesel engine after going through physical properties analysis. The objective of present work is to investigate experimentally the effects of Dual Bio-diesel blends on performance and emissions of VCR DI constant speed Diesel Engine under various loads and Compression Ratios. Performance and Emission Tests were conducted on VCR Diesel Engine running at a constant speed of 1500 r.p.m. under various loads and compression ratios. Results showed that Brake power (BP) is increased by 1.5% for the test fuel D90PB5JB5 compared to Diesel. BSFC of D90JB5PB5 Test Fuel is almost same as that of conventional Diesel fuel whereas D80JB10PB10 test fuel showed a slight increase in BSFC at all loads when compared to fossil Diesel fuel. Brake Thermal Efficiency is maximum for D90JB5PB5 Bio-diesel blend and it is minimum for D80JB10PB10 when compared to diesel. It was observed that CO and HC emissions were decreased when Engine is running with dualbiodiesel blends when compared to conventional diesel fuel. KeywordsGlobal Warming, Duel Biodiesel blends, palm and Jatropha.

EXPERIMENTAL INVESTIGATION ON VCR DI DIESEL ENGINE FUELLED WITH DUAL BIODIESEL BLENDS OF PALM AND JATROPHA