2.3.16. Fuel injection system z The fuel is stored under pressure in the common rail ready for injection. The injected fuel quantity is defined by the driver, and the start of injection and injection pressure are calculated by the ECU on the basis of the stored maps. The ECU then triggers the solenoid valves so that the injector (injection unit) at each engine cylinder injects accordingly . Injector Cylinder head Common rail Fuel filter ECU Fuel high pressure pump Priming pump ECU cooler Primary fuel filter Fuel tank Water separater 2.3.17.
Bleeding the fuel system z Loosen the fuel delivery pipe connected to the fuel high pressure pump from the secondary fuel filter, operate manually the priming pump until bubbles are not found, and bleed the system. DL06 Diesel Engine Technical Information 29