What are piston rings used for?

Piston rings play a crucial role in the operation of an internal combustion engine. They are located around the piston and serve primarily to maintain compression within the combustion chamber. This is essential because maintaining proper compression allows for an efficient combustion process, which directly affects the engine's power output and efficiency.

Additionally, piston rings help to prevent oil from leaking into the combustion chamber. If oil were to seep through, it could lead to issues like increased emissions, lower performance, and potential engine damage. Thus, the ability of piston rings to effectively seal the combustion chamber and restrict oil consumption is fundamental to engine performance and longevity.

In contrast, the functions related to air intake, vehicle propulsion, and temperature regulation are achieved through other components of the engine and system, which underscores the specific and critical purpose of piston rings in maintaining proper engine function.