1 Exhaust gas from engine 2 Oxidation catalytic converter 3 Filtered exhaust gas 4 Diesel particulate filter 5 Catalytically cleaned exhaust gas The diesel particulate filter is designed as a separate component and is downstream of the oxidation catalytic converter. The particulate filter is a honeycomb structure, the walls of which are made of porous… Read More »
1 Catalytic converter exhaust gas temperature sensor 2 Exhaust gas temperature sensor – diesel particulate filter 3 Diesel particulate filter 4 Pipes to diesel particulate filter differential pressure sensor 5 Instrument cluster 6 Fuel-additive control unit 7 Tank flap switch 8 Tank flap solenoid 9 Fuel additive tank 10 Fuel additive pump unit 11 Fuel… Read More »
1 PCM 2 High pressure pump 3 High pressure chambers for high pressure generation 4 Fuel feed 5 Fuel metering valve 6 Fuel pressure control valve 7 Fuel pressure sensor 8 Fuel rail 9 Solenoid valve 10 Injector needle The engine management system on the common rail injection system is capable of providing the optimum… Read More »
The illustration shows boost pressure control on the 2.0L Duratorq-TDCi (DW) diesel engine 1 Boost pressure solenoid valve 2 MAP sensor 3 Intercooler 4 Vacuum unit for variable turbine geometry (with turbocharger position sensor) 5 Turbocharger(s) 6 PCM 7 Vacuum pump On a variable turbocharger, the boost pressure is regulated by adjusting the guide vanes.… Read More »
1 Coolant pump 2 EGR cooler 3 Heater core 4 Thermostat housing 5 Bypass solenoid valve 6 Thermostat 7 Shutoff solenoid valve 8 Radiator 9 Oil/coolant heat exchanger 10 Coolant reservoir Some versions with Siemens common rail system are equipped with an engine warm-up regulator. This regulator permits faster warming up of the engine and… Read More »
A Installation position on 1.4L Duratorq-TDCi (DV) diesel engine (Emission Standard IV) B Installation position on 2.0L Duratorq-TDCi (DW) diesel engine Depending on the engine version, an electrically controlled EGR valve is used in the Siemens Common Rail system. This EGR valve comprises the following components: • Servo motor, • Position sensor, • the EGR… Read More »
Function The EGR valve solenoid valve is actuated via PWM signals from the PCM, in accordance with the required exhaust gas quantity to be recirculated. The duty cycle with which the EGR valve solenoid valve is actuated by the PCM therefore determines the appropriate vacuum level for actuation of the EGR valve and consequently of… Read More »
Some engine versions with emission standard IV (without diesel particulate filter) are equipped with an intake manifold flap servo motor. In these versions the intake manifold flap only serves to restrict the intake air for more efficient exhaust gas recirculation (more efficient exhaust gas recirculation at lower engine speed/load ranges). If the system does not… Read More »
1 Air flow in intake manifold 2 Intake manifold flap 3 PCM 4 Intake manifold flap solenoid valve 5 Vacuum unit In some versions, a vacuum-operated intake manifold flap is used, which is actuated via an intake manifold flap solenoid valve. The intake manifold flap has the following functions: • Preventing “serious engine judder” when… Read More »
1 Electrical turbocharger guide vane adjustment actuator 2 Actuator lever At the time of going to press, installed in the 1.8L Duratorq-TDCi (Kent) diesel engine only. The purpose and internal functioning are similar to the installed actuator in the Delphi common rail system. However, the type of control differs. Two types are used in the… Read More »