DEUTZ Fuel Injector is the part of an engine's fuel delivery system that receives and sprays gasoline (or diesel) into the engine in the form of a high-pressure mist. There is one injector per cylinder that delivers fuel to the engine.On petrol engines, fuel injection replaced carburetors from the 1980s onward.[1] The primary difference between carburetion and fuel injection is that fuel injection atomizes the fuel through a small nozzle under high pressure, while a carburetor relies on suction created by intake air accelerated through a Venturi tube to draw the fuel into the airstream.