The project report for Piston Ring is as follows.

Piston rings are a critical component used in internal combustion engines (ICE) and play a vital role in maintaining engine efficiency and performance. These rings are thin circular metal components that are fitted into grooves on the outer diameter of a piston. Their primary function is to seal the combustion chamber, maintain proper compression, and ensure efficient energy transfer during engine operation. Without piston rings, engines would suffer from loss of compression, excessive oil consumption, and reduced performance.

A piston ring is generally designed as a circular ring with a small gap that allows it to expand and contract during installation and operation. These rings are usually manufactured as single-piece components with thin walls and a slotted opening, enabling them to maintain constant contact with the cylinder wall. This design allows the ring to act as a self-tightening seal that adapts to the movement of the piston while maintaining the required pressure inside the combustion chamber.

In most engines, multiple piston rings are installed on each piston, and their number and functionality depend on the type and capacity of the engine. A typical four-stroke engine generally uses three piston rings: two compression rings and one oil control ring. Compression rings prevent combustion gases from escaping, while the oil control ring regulates the distribution of lubricating oil along the cylinder walls to reduce friction and wear.

Large engines such as marine diesel engines or heavy-duty truck engines may use three or more rings to handle higher combustion pressure and temperature. These rings also assist in transferring heat from the piston to the cylinder walls, preventing overheating and ensuring smooth engine operation. Because of their essential role in engine efficiency, piston rings are considered one of the most important components in the automotive and mechanical engineering industries.