Basically the engine or engine on a car or motorcycle and which is related to fuel is the same, the same converts heat energy into motion energy in the sense that the sending machine is a set of compounds that convert heat power into a driving force that can be driven by an engine or combustion engine . The heat produced outside the engine is called an external combustion engine and the power produced in the engine is called an internal combustion engine. I hope this application is useful and applied for you, thank you