piston ring

Piston rings are critical components installed on the engine's piston. Their primary functions include providing a seal between the piston and the cylinder wall, facilitating the distribution of lubricating oil, and ensuring optimal engine performance. Piston rings are commonly utilized in both gasoline and diesel engines and can be categorized into three main types: compression rings, oil control rings, and dust exclusion rings. 1. Compression Rings: Positioned at the top of the piston, these rings prevent combustion gases from leaking into the crankcase. Additionally, they facilitate heat transfer from the piston to the cylinder wall, aiding in efficient cooling through the engine's cooling system. 2. Oil Control Rings: Located at the bottom of the piston, these rings regulate the thickness of the lubricating oil film on the cylinder wall. This prevents excessive oil from entering the combustion chamber, thereby minimizing carbon deposits and reducing pollutant emissions. 3. Dust Exclusion Rings: Positioned above the oil control rings, these rings prevent dust and other contaminants from entering the gap between the piston and the cylinder wall, maintaining the cleanliness of the lubrication system.