Engine is the heart of automobiles and valve mechanism is the heart of engine. There are two types of the valves are used in internal combustion engines which are intake valve and exhaust valve. Intake and exhaust valves are used to control the flow of intake fresh charge and Exhaust flue gases alternatively in Engine. They are used to seal the working space inside cylinder against the manifold and they open and close by means of what is known as the Valve gear mechanism. Exhaust valve work

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... in engines because the pressure inside the combustion chamber pushes valve against the seat, sealing the chamber and preventing leaks during this cycle exhaust valves are exposed to high temperature and pressure which will affect the life and performance of the engine. The aim of the project is to design an exhaust valve with a suitable material along with the three different fillet radii for a four-stroke diesel engine by using Finite Element Analysis. In exhaust valve we have considered Aluminium 7068 alloy, Silicon carbide reinforced Zirconium di-boride and Carbon fiber composite material. In this we observe the results of existing exhaust valve's stress, strain and total deformation values are compared to the modified exhaust valve design are shows tremendous change in stress, strain and total deformation of the composite material.