On this model board, the most important elements of the common rail injection unit can be set up and connected to fuel lines. The fuel is fed by the feed pipe (gear wheel pump, cutaway) to the high-pressure pump. By turning the clamp screw grip, you see the generation of the high pressure. From here, the fuel is pushed into the cutaway manifold and then enters the injectors (one injector cutaway). Further, the return passage of the fuel can be seen. On the left and right of the cut- away manifold, you can see the rail pressure sensor and the rail pressure transmitter.