Use of vegetable oil ester in CI engine: Some studies under overload condition

Abstract

A CI engine under certain operating condition is subjected to overloading. An experimental investigation has been carried out to compare the NOX and particulate emission of a CI engine when fueled with diesel and vegetable oil ester separately, for overload condition. The resulting increase(or decrease) in parameters like BSEC, exhaust temperature and CO,NOX,CO2 & O2 emission are compared for ester at full load and overload conditions. Proportion of overload considered is 10% more than the full load. The combustion characteristics like peak pressure, crank angle at peak pressure etc., have been obtained from data acquisition system. The vegetable oil chosen for study is sunflower oil ester. To find the appropriate injection timing under overload condition, the engine has been run at three different injection timings Viz., 24.5 bTDC(normal), 23 bTDC and 21.5 bTDC. The results indicated that slight retardation in injection timing is beneficial for vegetable oil ester under overload condition. � 2007 Combustion Institute. All Rights Reserved.