EFFECT OF INJECTION TIMING AND NOZZLE HOLE GEOMETRY ON COMPRESSION IGNITION ENGINE FUELLED WITH THEVETIA PERUVIANA BIODIESEL.

In the present study an experimental work had been carried out to analyze the performance and emission characteristics of various blends of thevetiaperuviana biodiesel by varying injection timings and nozzle hole geometry. The engine tests are conducted on Kirloskar, 4-stroke, single cylinder, 1500 rpm, water cooled, direct injection, diesel engine with Eddy Current Dynamometer with standard injection pressure 230 bar and injection timing 23?BTDC was maintained constant throughout the experiment. Three different injection timings such as 20?BTDC, 23?BTDC and 26?BTDC and three different nozzles such as 3 hole, 4 hole and 5 hole are varied to analyze the performance and emission characteristics. From the test results, it could be observed that among three different injection timings 26?BTDC and among three different nozzles 5 hole nozzle gives higher efficiency and lower emissions as compared to other two injection timings and other two nozzles.