Where Oil scraper ring is used?

The oil scraper ring is used in internal combustion engines, specifically in the piston assembly. Its primary function is to control the amount of engine oil that lubricates the cylinder walls while preventing excess oil from entering the combustion chamber. By scraping off excess oil from the cylinder walls and returning it to the oil sump, the oil scraper ring helps maintain optimal lubrication, reduces oil consumption, and minimizes exhaust emissions.