NUMERICAL COMBUSTION ANALYSIS AND IGNITION TIMING OPTIMIZATION OF 4 STROKE SI ENGINE

The design and manufacture of IC Engines is under significant pressure for improvement. Engine designing is a herculean task, as each stroke needs to be carefully studied before manufacturing. Computational Fluid Dynamics (CFD) is a powerful tool used for predicting the behaviour of difficult problems in a cost effective way and the solutions converging are approximately close to the original. Optimal ignition timing is necessary for producing maximum gas pressure and low brake specific fuel consumption (BSFC) for a particular speed and it is obtained by finding maximum brake torque (MBT). In this work, the numerical combustion analysis of a single cylinder 4 stroke SI engine at different ignition timings for a particular speed (4000 rpm) is conducted and the optimum spark timing is identified using genetic algorithm (GA).