Valve Train System in IC Engine:

Valve train system plays a significant role in the functioning of an IC engine. It is responsible for opening and closing the engine valves, which allows the air-fuel mixture to enter the combustion chamber and exhaust gases to exit during the engine's combustion cycle. The following parts constitute the valve train system:

1. Camshaft:

The camshaft is the primary part of the valve train system, responsible for controlling the opening and closing of the engine valves. It is a cylindrical shaft mounted on the engine block, which rotates in synchronization with the crankshaft, and contains the cam lobes that actuate the engine valves.

2. Cams:

Cams are the raised surfaces on the camshaft that push against the rocker arms or lifters to open and close the engine valves. They are designed to provide the proper timing and lift for the valves to ensure the engine operates efficiently.

3. Rocker arms:

Rocker arms are the pivoting levers that transmit the motion of the camshaft to the engine valves. They are mounted on the cylinder head and push the valves open when the camshaft lobes contact them.

4. Followers:

Followers are the components that transfer the motion of the camshaft to the rocker arms. They are typically either hydraulic or solid and are designed to reduce wear and tear on the camshaft and rocker arms.

5. Crankshaft:

While not directly part of the valve train system, the crankshaft is an essential component that works in conjunction with the camshaft to ensure proper engine operation. It converts the linear motion of the pistons into rotational motion, which is transmitted through the camshaft to open and close the engine valves.

Conclusion:

In summary, the valve train system in an IC engine is a crucial component responsible for opening and closing the engine valves. It includes the camshaft, cams, rocker arms, followers, and crankshaft. Proper design and maintenance of this system are critical to ensure the efficient operation of the engine.