Engine systems are essential components of vehicles and machinery that convert fuel into mechanical energy. They consist of various parts, including the cylinder, piston, and crankshaft, which work together to create power. When fuel is ignited in the cylinder, it pushes the piston down, turning the crankshaft and ultimately driving the vehicle's wheels. In addition to the main components, engine systems also include supporting elements like the fuel system, which delivers fuel, and the cooling system, which prevents overheating. Together, these systems ensure that the engine runs efficiently and reliably, providing the necessary power for movement and operation.