Abstract
In this article, an endeavor has been made to assess the operating characteristics of a diesel engine fuelled with methyl esters of pungamia, ethyl esters of pungamia, and ethyl esters of neem, added to diesel by percentage volume ranging from B20 to B80. The test runs on diesel fuel in the first phase of work were carried out under standard injection timing of 23° before top dead center (BTDC), so as to establish baseline for other parameters. The similar test procedures were repeated with an advanced injection timings of 26° BTDC and 28° BTDC fuelled with diesel and biodiesel–diesel blends varying from B20 to B100. Experimental results proved that the 3° advancement of injection timing from the standard injection timing proved promising outcomes for biodiesel operated engine, whereas 5° BTDC crank angle degree produced a higher exhaust gas temperature and higher levels of NOx formation.
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