How does valves work on a small engine?

Valves on a small engine control the flow of air and fuel into the combustion chamber and the expulsion of exhaust gases. Typically, there are two types of valves: intake valves, which open to allow the air-fuel mixture in, and exhaust valves, which open to let out combustion gases. These valves are operated by a camshaft that pushes them open at specific times during the engine's four-stroke cycle (intake, compression, power, and exhaust). Proper valve timing and function are crucial for efficient engine performance and power generation.