What component connects the piston to the crankshaft?

The connecting rod is the component that plays a crucial role in linking the piston to the crankshaft in an internal combustion engine. When the piston moves up and down within the cylinder due to the combustion process, it exerts force on the connecting rod. This motion is then transferred to the crankshaft, which converts the linear motion of the piston into rotational motion. This conversion is essential for the engine’s operation, allowing the engine to generate the necessary power to drive the vehicle.

The other components listed do not serve this function. The timing belt is responsible for synchronizing the rotation of the crankshaft and the camshaft to ensure proper timing of the engine's valves, while the camshaft is involved in opening and closing the engine's intake and exhaust valves. The spark plug is essential for igniting the air-fuel mixture within the cylinder but does not have a role in connecting the piston to the crankshaft. Understanding the specific function of each engine component helps clarify the overall operation of an internal combustion engine.