Category Archives for Siemens-Common Rail System

Siemens-Common Rail System – Operating principle of the fuel injectors

Fuel injector closed 1 High pressure feed line 2 Control piston 3 Fuel return 4 Piezo actuator 5 Valve mushroom 6 Control chamber 7 Nozzle prechamber 8 Injector needle The fuel is fed at high pressure from the fuel rail … Continue reading

03. September 2018 by sam
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Siemens-Common Rail System – Fuel injectors

A Fuel injector (1.4L Duratorq-TDCi (DV) diesel engine and 1.8L Duratorq-TDCi (Kent) diesel engine) B Fuel injector (2.0L Duratorq-TDCi (DW) diesel engine) C Fuel injector head D Hydraulic servo system E Fuel injector nozzle 1 Connector for PCM 2 Piezo … Continue reading

03. September 2018 by sam
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Siemens-Common Rail System – Fuel rail (common rail) and high pressure fuel lines

The illustration shows the system in the 2.0L Duratorq-TDCi (DW) diesel engine 1 High pressure fuel lines (to the fuel injectors) 2 High pressure pump line (to high pressure pump) 3 Fuel rail 4 Fuel pressure sensor The fuel rail … Continue reading

03. September 2018 by sam
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Siemens-Common Rail System – Principle of high pressure generation (delivery stroke)

When the pump plunger passes BDC, the inlet valve closes due to the increasing pressure in the high pressure chamber. The fuel in the high-pressure chamber can no longer escape. As soon as the pressure in the high pressure chamber … Continue reading

03. September 2018 by sam
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Siemens-Common Rail System – Principle of high pressure generation (intake stroke)

A Fuel intake B Fuel delivery C Fuel feed from fuel metering valve D Fuel delivery to high pressure ring line 1 Inlet valve 2 Outlet valve 3 Piston 4 Drive shaft 5 Eccentric The three pump plungers are actuated … Continue reading

03. September 2018 by sam
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Siemens-Common Rail System – High pressure generation and fuel routing in the high pressure pump

A Fuel feed B Fuel feed (fuel quantity fed to the high pressure pump) C High pressure connection to the fuel rail D Fuel return 1 Admission-pressure control valve 2 Screen filter 3 Intake side of transfer pump 4 Transfer … Continue reading

03. September 2018 by sam
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Siemens-Common Rail System – High pressure pump

The illustration shows the high pressure pump with drive shaft for timing belt drive (1.4L Duratorq-TDCi (DV) diesel engine) A Fuel return B High-pressure connection C Fuel feed 1 Fuel metering valve (partial view) 2 High pressure pump element (displacement … Continue reading

03. September 2018 by sam
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Siemens-Common Rail System – High-pressure system

The illustration shows the high pressure system of the 2.0L Duratorq-TDCi (DW) diesel engine 1 Fuel injector 2 Fuel metering valve 3 Fuel pressure control valve 4 High pressure pump 5 Fuel rail 6 Fuel pressure sensor

02. September 2018 by sam
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Siemens-Common Rail System – Manual pump

A Direction of travel 1 Fuel return to fuel tank 2 Manual pump 3 Hand pump bypass line 4 Fuel feed line to high pressure pump 5 Fuel return line from high pressure pump 6 Fuel feed line from fuel … Continue reading

02. September 2018 by sam
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Siemens-Common Rail System – Fuel filter

Fuel filter of the 1.4L Duratorq-TDCi (DV) diesel engine 1 Fuel feed port (from fuel tank) 2 Fuel feed port (to high pressure pump) 3 Fuel filter with water separator 4 Water drain screw 5 Electric fuel pre-heater Different fuel … Continue reading

02. September 2018 by sam
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