What does the compression ring primarily do?

The compression ring plays a crucial role in the functioning of an internal combustion engine by creating a seal between the piston and the cylinder wall. Its primary purpose is to maintain compression within the combustion chamber. When the piston moves upward during the compression stroke, the compression ring expands against the cylinder wall due to the forces acting on it, thereby preventing leakage of gases. This effective sealing is essential for maximizing the engine’s efficiency and power output, as it helps improve combustion by retaining the fuel-air mixture and combustion gases during operation.

This sealing capability ensures that the engine operates smoothly and consistently, contributing to overall performance and fuel efficiency. Without a properly functioning compression ring, the engine could experience a loss of power and potential overheating due to improper combustion.