VN 9.027 1. High pressure pipe supplying fuel to the high pressure fuel pump; 2. TKVD; 3. High pressure fuel pipes delivering fuel from the high pressure fuel pump to the injectors; 4. Fuel pressure sensor in the high pressure fuel pump; 5. Fuel injection pump; 6. Pressure control valve in the high pressure fuel system; 7. Fuel injector 1st cylinder; 8. Fuel injector 1st cylinder; 9. Fuel injector 1st cylinder; 10. Fuel injector 1st cylinder; 11. Valve for regulating the amount of fuel supplied
Tightening torque of the pressure sensor in the threaded hole of the HPTC: 20-22 Nm
Purpose
Measuring the current pressure value in the high pressure fuel pump and transmitting a signal to the engine control unit.
Design
The fuel pressure sensor in the high-pressure fuel pump contains a diaphragm made of high-strength spring steel and connected to a semiconductor (polycrystalline silicon) strain gauge sensor.
Original source of information: MercedesMan.ru
Functioning
The fuel pressure sensor in the HPFK measures the current pressure value in the HPFK and transmits a signal in the form of a voltage proportional to the pressure to the engine control unit N3/9.
Based on the sensor signal, the engine control unit generates a control signal transmitted to the pressure regulation valve in the high-pressure fuel pump.