Inderscience Publishers

Effect of injection timings on the performance, emission and combustion characteristics of DI diesel engine running on Calophyllum inophyllum linn oil (honne oil)

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The present work examines the use of a non–edible vegetable oil namely honne oil, a new possible alternative fuel for diesel engine. A direct injection (DI) diesel engine typically used in agricultural sector was operated on neat diesel (ND) and neat honne oil (H100). Static injection timing (start of static injection timing) was changed to study the performance, emission and combustion characteristics. It was observed that advancing the injection timing with H100 from the rated static injection timing (23° bTDC) increased the brake thermal efficiency and reduced CO, HC emissions and smoke opacity; however, NO

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emission was increased. The ignition delay with H100 was higher than that with ND for all static injection timing under consideration. Improved premixed heat release rate was observed with H100 when the static injection timing is advanced however, for 28° bTDC premixed heat release rates decreased. The best static injection timing was found to be 27° bTDC for H100 based on brake thermal efficiency.

Keywords: neat honne oil, H100, diesel engines, biodiesel, static injection timings, engine performance, emissions, combustion, Calophyllum inophyllum linn oil, vegetable oil, alternative fuels, agricultural engines, brake thermal efficiency, heat release rate

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