The secondary ring (oil control ring) is a critical sealing component positioned below the compression ring in the piston groove. It precisely controls oil film thickness and regulates lubrication supply between the piston and cylinder wall.

Piston rings serve as essential sealing elements in internal combustion engines, forming a precise sealing gap between piston and cylinder wall. The system includes compression rings, oil control rings, and explosion rings, each engineered for specific operational functions.

Compression rings feature exceptional wear resistance and thermal stability, engineered to withstand high temperatures, extreme pressures, and continuous reciprocating motion. Common designs include L-shaped and T-shaped cross-sections for optimal sealing performance.

• Sealing Principle: Prevents leakage of lubricating oil and combustion gases
• Lubrication Principle: Forms controlled oil film to minimize friction and wear
• Guiding Principle: Ensures stable piston movement along cylinder wall
• Heat Dissipation: Efficiently transfers heat from piston to cylinder
• Contamination Prevention: Blocks impurities from entering critical engine areas

Advanced design and manufacturing optimization enhance engine efficiency, reliability, and operational lifespan while reducing energy consumption and environmental impact.