A COMPREHENSIVE REVIEW ON COMBUSTION OF COMPRESSION IGNITION ENGINES USING BIODIESEL INTERNATIONAL JOURNAL OF MECHANICAL ENGINEERING AND TECHNOLOGY (IJMET) IJMET © I A E M E

Abstract

ABSTRACT The world today is confronted with a twin crisis of fossil fuel depletion and environmental degradation. Rapid depletion of petroleum derived fuels has forced the researchers to find out alternative fuels for IC engines. Biodiesel is an alternative fuel for conventional diesel engines and can be used without major modification of the engines. When compared to diesel, biodiesel has a higher cetane number which results in shorter ignition delay and longer combustion duration and hence results in low particulate emissions. The combustion of CI engine is a complex process due to its combustion mechanism. The combustion characteristics of an engine are defined by parameters such as cylinder pressure, maximum rate of pressure rise, heat release, cumulative heat release, ignition delay and combustion duration. Analysis of combustion characteristics is significant because it provides the important information which in turn helps in interpreting the engine performance and exhaust emissions. This paper reviews the combustion analysis of compression ignition engines using biodiesel. It is found that the ignition delay for biodiesel seems to be less when compared to diesel. Moreover, it reveals that the heat release rate is more during the diffusion combustion for biodiesel and its blends than diesel. Similarly a marked difference is seen in the cumulative heat release rate and combustion duration