## Piston Ring Definition: Everything You Need to Know.
1. What is a piston ring?
2. What is the function of a piston ring?
3. What are the types of piston rings?
## Answers.
1. A piston ring is a metal ring that fits tightly around the outer diameter of a piston in an internal combustion engine.
2. The primary function of a piston ring is to seal the combustion chamber and prevent gas leakage from the combustion process. It also helps regulate the amount of oil that reaches the cylinder walls to lubricate them.
3. There are three main types of piston rings:
- Compression rings: These rings are responsible for sealing the combustion chamber and preventing gas leakage during the combustion process.
- Oil control rings: These rings help regulate the amount of oil that reaches the cylinder walls to provide lubrication and reduce friction.
- Wiper rings: These rings scrape excess oil off the cylinder walls to prevent oil from entering the combustion chamber and burning.
Overall, piston rings play a crucial role in ensuring the efficient operation and longevity of an internal combustion engine by sealing the combustion chamber and providing proper lubrication to the cylinder walls.
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