What are the rings on a piston? Simply put, piston rings form a seal between the piston and cylinder wall, which prevents pressurized combustion gases from entering the oil sump. They also regulate oil consumption by preventing excessive oil from entering the combustion chamber and burning.
Why do we use piston rings? The main functions of piston rings in engines are: Sealing the combustion chamber so that there is minimal loss of gases to the crank case. Improving heat transfer from the piston to the cylinder wall. ... Regulating engine oil consumption by scraping oil from the cylinder walls back to the sump.
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