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What are the functions of compression rings and oil rings?

1 Answers

VonBethany

07/29/25 10:16pm

Compression rings serve to seal the gap between the piston and cylinder, preventing gas leakage and oil blow-by, while transferring heat from the piston to the cylinder. Oil rings function to scrape excess lubricating oil off the cylinder walls and distribute oil evenly. Below are additional details about compression rings and oil rings: 1. Compression rings: Typically, each piston in an engine is equipped with 2 to 3 compression rings. Poor sealing by compression rings can lead to difficulties in engine starting, reduced power output, increased fuel and oil consumption, among other issues. 2. Oil rings: Oil rings are divided into conventional oil rings and composite oil rings. They are a type of piston ring, usually made of alloy cast iron. The outer surface features a central groove with numerous small oil drainage holes or slots at its base.

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