ТОПЛИВНАЯ СИСТЕМА


  1. CONSTRUCTION


    1. The function of the common-rail assembly is to store the fuel that has been pressurized by the supply pump. The common-rail assembly is provided with a fuel pressure sensor that detects the fuel pressure in the common-rail, and a pressure discharge valve, which regulates the fuel pressure.

    2. Internally, the common-rail assembly contains a main hole and 5 branch holes that intersect the main hole. Each branch hole functions as an orifice that dampens the fluctuation of the fuel pressure.

    3. In the pressure discharge valve, the plunger opens and closes in accordance with the actuation signals from the injector driver. Thus, it regulates pressure by releasing excess pressure from the common-rail assembly. In addition, it has a pressure reduction function in case of emergency.

      A00XRO1C01
      *1 Fuel Pressure Sensor *2 Branch Hole
      *3 Main Hole *4 Pressure Discharge Valve
      *a From Supply Pump *b To Injector
      *c To Fuel Tank (Excess Pressure) *d From Common-rail Assembly (High Pressure)

      Tech Tips

      Because the fuel pressure sensor uses a plastic-deformed sealing portion to ensure sealing performance, it cannot be reused after disassembling. The fuel pressure sensor and pressure discharge valve are supplied as a set with the common-rail assembly. Do not disassemble the fuel pressure sensor and pressure discharge valve. Also, if parts that affect the alignment have been changed, make sure to replace the pipe with a new one as well.The parts that require the replacement of the injection pipe or fuel inlet pipe are listed below:


      • Injection pipe: injector, common-rail assembly, cylinder head and intake manifold

      • Fuel inlet pipe: supply pump, common-rail assembly, cylinder head and intake manifold