Effect of injection timing on alcohol-biodiesel-diesel ternary blends in a CI engine

Abstract

The major concerns of using Jojoba oil in CI engines is its high viscosity, low volatility, and high NOx formation. In this work, an analysis of the emission parameters and efficiency of a jojoba biodiesel-fuelled engine is carried out. This research study investigates the impacts of the addition of higher order alcohols with diesel fuel on the performance and emission parameters of CI engine working with diesel-jojoba oil methyl ester blend. 5% and 10% by volume of n-butanol is combined with B20 blend of jojoba oil methyl ester. The experiment is divided in two steps, firstly, the optimum combination of alcohol with biodiesel is evaluated based on the BTE and emission parameters. Secondly, the effect of varying the injection timing from 21°, 23° and 25° BTDC for the alcohol blends of diesel-biodiesel blends are studied. BTE increases by 4.5% for B20+10% butanol and NO emission decreases by 23%. Other emissions are facing a significant drop except HC emissions. Delayed injection timing of 21° BTDC reduces NO emission further by 18.4%. The findings prove that adding n-butanol, oxygenated fuel could enhance the viscosity issue of jojoba oil methyl ester and the mixtures as well resulting in an enhancement in their performance parameters.