A car engine is a machine that converts fuel into motion, allowing the vehicle to move. It works by igniting a mixture of air and fuel in a series of small explosions, which push pistons up and down. These pistons are connected to a crankshaft, which turns and ultimately powers the wheels of the car. There are different types of engines, such as internal combustion engines and electric engines. Internal combustion engines use gasoline or diesel, while electric engines run on batteries. Each type has its own advantages, but both are essential for making cars function and transport us from one place to another.