Design and analysis of exhaust manifold of the spark ignition engine for emission reduction

The design geometry of exhaust manifold plays a vital role in smooth combustion and emission reduction of the spark ignition engine. In this work, by analysing and comparing the exhaust gas back pressures and its velocities of different types of manifold models chosen at different operating load conditions of the engine, the best exhaust manifold of model 5 has been found and recommended to use in the multi-cylinder engine to control the engine emission and protect the environment. The analysis is done with a virtual model of manifold. Modelling and analysis of exhaust manifold are carried out by CATIA v5 and ANSYS software.