Study of Theoretical Modelling of Combustion Characteristics of Biodiesel Fuelled Direct Injection CI Engine - A Review

Increasing of costly and depleting fossil fuels are prompting researchers to use edible as well as no edible vegetable oils as a promising alternative to petro-diesel fuels. Biodiesel are found near about similar properties like diesel. A comprehensive computer code using �Quick basic� language was developed for the diesel engine cycle to study the combustion characteristics of a single cylinder, four stroke, direct injection diesel engine. The engine operates on diesel fuel and 20% (mass basis) of biodiesel blended with diesel. Combustion characteristics such as cylinder pressure, heat release fraction, heat transfer were analyzed. On the basis of the first law of thermodynamics the properties at each degree crank angle was calculated. Wiebe function is used to calculate the instantaneous heat release rate. A simulated combustion results are found satisfactory with experimental results.