What part of an automobile engine uses lobes to open and close intake and exhaust valves, and allows an air/fuel mixture into the engine?

The part of an automobile engine that uses lobes to open and close intake and exhaust valves, and allows an air-fuel mixture into the engine, is known as the camshaft. The lobes on the camshaft are strategically designed to lift and lower the valves at specific intervals, coordinating with the engine's combustion cycle. As the camshaft rotates, it controls the intake and exhaust valve timing, thereby ensuring the proper flow of air-fuel mixture into the engine and efficient expulsion of exhaust gases. Overall, the camshaft plays a crucial role in determining the engine's performance and efficiency by regulating the valve operation.