Piston Rings And Material

When you think of piston rings, have you ever considered that they are the smallest component of the internal combustion engine, yet have the largest responsibility? When you assemble an engine, you never really grasp what the piston ring is going to do during its lifespan, making the performance of this diminutive component even larger in reality. The piston rings have three major tasks to ensure the engine makes consistent power efficiently. Piston rings commonly used on small engines include the compression ring, wiper ring, and oil ring. Compression Ring A compression ring is the piston ring located in the ring groove closest to the piston head. The compression ring seals the combustion chamber from any leakage during the combustion process. When the air-fuel mixture is ignited, pressure from combustion gases is applied to the piston head, forcing the piston toward the crankshaft. The pressurized gases travel through the gap between the cylinder wall and the piston and into the piston ring groove. Combustion gas pressure forces the piston ring against the cylinder wall to form a seal. Pressure applied to the piston ring is approximately proportional to the combustion gas pressure. Wiper Ring A wiper ring is the piston … Continue reading Piston Rings And Material