<human>:  How does an internal combustion engine work?
<bot>: An internal combustion engine works by using the pressure created by the combustion of a fuel (such as gasoline) and air mixture to move a piston within a cylinder. As the piston moves up and down within the cylinder, it turns the crankshaft connected to the piston, which then turns the fuel pumps, valves, and other components of the engine, creating power which can be used to drive a vehicle.