Final answer:
The compression rings in an engine provide a seal, distribute oil, and scrape excess oil.
Step-by-step explanation:
The function of the compression rings in an internal combustion engine is to provide a good seal between the piston and the cylinder wall. They ensure that the combustion gases generated during the engine's power stroke are confined to the combustion chamber and do not leak into the crankcase.
The compression rings also help distribute the oil on the cylinder wall, ensuring proper lubrication between the piston and cylinder. This reduces friction and wear, contributing to the engine's overall efficiency and longevity.
Additionally, the compression rings scrape excess oil from the cylinder wall, preventing it from entering the combustion chamber and causing issues such as oil burning and increased emissions.
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