UENR0623-02 31 Engine Operation The fuel manifold (2) stores high-pressure fuel from the fuel injection pump. The high-pressure fuel will flow to the injectors. The fuel pressure sensor (3) measures the fuel pressure in the fuel manifold (2). The pressure relief valve (1) will prevent the fuel pressure from getting too high. i06718976 Electronic Control System Introduction The engine is designed for electronic control. The engine has an Electronic Control Module (ECM), a fuel injection pump, and electronic unit injectors. All these items are electronically controlled. There are also various engine sensors.
The engine is equipped with an electronically controlled wastegate for the turbocharger. The ECM controls the engine operating parameters through the software within the ECM and the inputs from the various sensors. The software contains parameters that control the engine operation. The parameters include all the operating maps and customer-selected parameters.
Illustration 26 g02889596 Typical example (1) Valve for the NOx Reduction System (NRS) (2) Air cleaner (3) Air inlet temperature sensor (4) Oxygen sensor (5) Diesel Oxidation Catalyst (DOC) inlet temperature sensor (6) Diesel Particulate Filter (DPF) inlet temperature sensor (7) Diesel Oxidation Catalyst (DOC) (8) Diesel Particulate Filter (DPF) (9) Exhaust Cooler for the NOx Reduction System (NRS) (10) Turbocharger (11) DPF differential pressure sensor (wall flow DPF only) (12) Engine intake throttle valve (13) Air-to-air aftercooler (14) Wastegate regulator (15) Engine exhaust gas pressure sensor