A car's engine is a complex machine that converts fuel into motion. It works by igniting a mixture of air and fuel in a series of small chambers called cylinders. This process creates explosions that push pistons, which then turn the crankshaft, ultimately powering the car's wheels. Engines can be powered by different types of fuel, such as gasoline or diesel. Some modern cars use electric engines, which rely on batteries instead of traditional fuel. Regardless of the type, the engine is essential for a car's operation, providing the energy needed for movement and performance.