Abstract
In recent 10 years biodiesel fuel was studied extensively as an alternative fuel. Most of researchers reported performance and emission of biodiesel and their blends with constant compression ratio. Also all the research was conducted with use of single biodiesel and its blend. Few reports are observed with the use of variable compression ratio. Main aim of the present study is performance and emission analysis of two biodiesel for various compression ratios and explores the use of more than one blend of biodiesel with diesel. In the present study Jatropha and Karanja biodiesel was tested on single cylinder VCR DI diesel engine for three compression ratio 14, 16 and 18. Longer delay period for Jatropha fuel was observed compare with Karanja fuel, this is main reason for low NOx emission with Karanja Fuel.
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