A camshaft is a rotating cylindrical shaft used to regulate the injection of vaporized fuel in an internal combustion engine. These are occasionally confused with the crankshaft of the engine, where the reciprocating motion of the pistons is converted into rotational energy. Instead, camshafts are responsible for accurately-timed fuel injections required by internal combustion engines. Camshafts have multiple cams on them, which are used to open valves through either direct contact or pushrods. A camshaft is directly coupled to the crankshaft, so that the value openings are timed accordingly. An engine camshaft can be made from many different types of materials. The materials used in the camshaft depend upon the quality and type of engine being manufacture d. For most mass-produced automobiles, chilled cast iron is used. Not only it is cheap, but child cast iron is also extremely durable and reliable. This is because cold treating increases the strength and hardness of any metal that undergoes the process. In this project, a cam shaft will be designed for a 150cc engine and modeled through pro/engineer. Present used material for camshaft is cast iron. In this work, the camshaft material will be replaced with steel and aluminum alloy. Structural analysis and model analysis will be done on cam shaft using cast iron, steel and aluminum alloy. Comparison will be done for the three materials to verify the better material for camshaft. Modeling will be done using pro/Engineer software and analysis will be done using ANSYS.

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