How a Car Engine Works
It's worth noting that the engine illustrated is a gasoline direct injection engine, which are fairly common on new cars but historically not so.Until the early 2000s most fuel injected gasoline engines were multi-point injection - the fuel was injected in to the incoming air stream immediately before the cylinder, and before that indirect injection which injected where the carburettor was.Then there are carburettor engines.Most diesel engines have been direct injection for many decades now, due to the behaviour of the fuel.