What is the function of the oil control ring?

The oil control ring plays a crucial role in the lubrication system of an engine. Its primary function is to manage the oil on the cylinder walls. Specifically, it wipes excess oil from the walls of the cylinder, ensuring that an appropriate amount of oil remains for lubrication of the piston and cylinder surfaces while preventing excessive oil from entering the combustion chamber. This action helps in maintaining the optimal oil level for lubrication and also minimizes oil consumption and smoke emissions from the exhaust.

By facilitating this process, the oil control ring ensures that the engine operates efficiently and effectively, allowing for smooth movement of the piston while protecting the engine components from wear due to friction. This is essential for maintaining engine performance and longevity.