SAFARI

138 ENGINE2.2LDICOR ECU The Electronic control Uni t is a 32 bi t microprocessorwhich controls the inject ion parameters as well as some of the vehicle related outputs such as Fan, AC drivability in gears, variable nozzle turbine turbocharger, EGRetc. TheECU receives input from various sensors located on the engine and the vehicle, and decides the injection quantity, injection timing, number of injections best suited for the engine to work with maximum efficiency and safety. Input to the ECU is received fromCrank sensor, Cam sensor,Vehicle speed sensor, Pedal sensor, Rail Pressure Sensor, Fuel Temperature sensor, Coolant temperature sensor, Air mass flow sensor, Boost Pressure and atmospheric pressure sensor, Knock sensor and water-in-fuel sensor, pump mounted sensor such as fuel temperature sensor. Based on all these inputs, the ECU controls all the injectors directly. It also controls the Inlet metering valve on the High pressure pump, Engine cooling Fans, Air conditioning and Exhaust Gas Recirculation (EGR) valve, variable nozzle turbine Turbocharger etc. The injection parameters are corrected for various atmospheric conditions like cold and hot climates and different Altitudes. Corrections are also applied considering engine safety in case of faults and any abnormal overheating.Fault detection is made simple. Faults are recorded in the ECUwhich makes it easy to be read with the help of a diagnostic tool and to find a solution. ECU (DCM3.2) InputsToECU Engine Speed-Crank Angle Input Air Quantity&Temperature Input Cam Angle Input Boost Pressure Input Coolant Temperature Input Knock Sensor Input Vehicle Speed Input Pedal Position Fuel Temperature Input Rail Pressure Input Clutch Switch Signal Brake Switch Signal A/COn/Off Signal Outputs fromECU Injection Quantity and Timing Control Signal to HPPump (IMV) Signal toEVRV(EGR) Signal toEVRV(VNT) Radiator Fans ACControl Glow Plug Service Lamp ECU&EMSSensors