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Global warming due to exhaust emissions, rapid depletion of crude oil, and strict carbon control legislation has forced researchers to search biofuels as substitute for petroleum diesel fuels. Biodiesel is a renewable and oxygenated fuel. It is free from sulfur, non-toxic and a biodegradable. The different non-edible vegetable oils such as Algae, Karanja and Jatropha could be used to produce biodiesel. Biodiesel is a green fuel with an exception that it emits 15-20% more NOx as compared to diesel fuel. The emissions of nanoparticles are more hazardous to human health. The nanoparticles emission of biodiesel must be measured according to the new strict regulations. The engine performance and the lower emission characteristics, except for NOx emission, for Algae, Karanja and Jatropha oil biodiesels are similar to those of diesel fuel.

Global emission, rapid exhaustion of oil reserves and stern emissions protocols force us to seek alternative fuels for heavy duty diesel engines. Assessing the influence of Gasoline and JP-8 fuels on the engine performance and gaseous emissions of heavy-duty diesel engines is essential. Multi-fuel strategy program is required for the both, combat vehicles and highways commercial vehicles to optimised the fuel availability. With the Gasoline and JP-8 fueled diesel engine, penalties of fuel economy are well known. Experimental evaluation has confirmed that Gasoline and JP-8 fuels have great potential in reducing NOx emissions. Present study focuses on the effect of engine performance and emission by using Gasoline and JP-8 fuels in heavy duty military engine. NOx and nanoparticles emissions reduction were assessed. EGR is a better technique to reduce NOx.