What is the function of Piston ring groove?

The piston ring groove serves as a seating area for piston rings within an engine's piston. Its primary function is to maintain a seal between the piston and the cylinder wall, preventing the escape of combustion gases and controlling oil consumption. Additionally, the groove allows for axial movement of the rings, accommodating thermal expansion and ensuring proper ring function during engine operation. Proper design and maintenance of the groove are essential for optimal engine performance and longevity.