1 Electrical turbocharger guide vane adjustment actuator 2 Variable geometry turbocharger In this system, a simplified electrical turbocharger guide vane adjustment actuator is used. The integral electronics in the actuator unit are no longer required. This means • that the DC motor is actuated directly by the PCM. • that the position of the guide… Read More »
For safety reasons, the APP sensor is designed as a breakerless double sensor. 1 PCM 2 Gateway (GEM) 3 APP sensor In this system, the signal from APP sensor 1 is transmitted directly as a Pulse Width Modulation signal to the PCM. The APP sensor 2 signal is transmitted as an analog signal to the… Read More »
The MAF sensor works according to the hot film principle. The sensor’s output signal is a digital square-wave signal with a variable frequency. The following generally applies: the frequency drops with increasing engine speed. The MAF sensor is used to control the exhaust gas recirculation (closed-loop control). Effects of faults In the event of a… Read More »
1 CHT sensor 2 MAPT sensor 3 MAF sensor 4 APP sensor 5 Oil level/temperature sensor (certain versions only) 6 Stoplamp switch 7 CKP sensor 8 CMP sensor 9 Fuel pressure sensor 10 VSS (vehicles with no ABS) 11 Oil pressure switch 12 Water-in-fuel sensor (certain markets only) 13 GEM 14 Electric EGR valve with… Read More »
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 via the high pressure feed line into the control chamber and the nozzle prechamber. The… Read More »
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 actuator 3 High pressure fuel line connection 4 Copper sealing ring 5 Emission standard coding… Read More »
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 is made of forged steel. The fuel rail performs the following functions: • stores fuel… Read More »
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 exceeds the pressure in the high pressure channel, the outlet valve opens and the fuel… Read More »
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 by the rotary movement of the high pressure pump drive shaft and the eccentric on… Read More »
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 pump 5 Fuel metering valve 6 Fuel pressure control valve 7 Fluid filter 8 High… Read More »