Modification and Evaluation of Fuel Injection System for IDI Diesel Engine Fueled with Jatropha Straight Vegetable Oil

Abstract

The emphasis was made to study newlinethe technical feasibility of JSVO for existing diesel engine after engine hardware newlinemodification such as fuel injection timing, fuel injection pressure and fuel newlinepreheating etc. newlineThe objectives of investigation were elevating the temperature of fuel before the newlinefuel is injected into combustion chamber, advancing the fuel injection point and newlineincreasing the fuel injection pressure. newlineInitially the physico-chemical properties such as viscosity, density, calorific newlinevalue, surface tension of diesel and JSVO were found out by the prescribed newlinemethods with the help of well calibrated precision equipments. The comparison of newlinephysico-chemical properties of JSVO with diesel was carried out. The viscosity newlinewhich is an important property, was measured by Alpha series rotational newlineviscometer manufactured by Fungi Lab. This instrument is capable of finding out newlineabsolute as well as relative viscosity. The rotational viscometer has accuracy and#61617; newline0.01 cSt. The densities of diesel and JSVO were measured by hydrometer. The newlinehydrometer has an accuracy of and#61617; 0.001. The surface tension of diesel and JSVO newlinewere also measured by multi frequency ultrasonic interferometer. The principle newlineinvolved in measurement of surface tension is based upon the accurate newlinedetermination of wave length in the medium. The surface tension was calculated newlinefrom wavelength by using empirical formula. The cetane index of diesel and newlineJSVO were also found out in the laboratory with the help of aniline apparatus. newlineThe major objective of this work for assessing the effects of these properties on newlinethe engine efficiency. The effect of these properties on the performance and newlineemission were analyzed. newline