SAFARI

138

ENGINE2.2LDICOR

ECU

The Electronic control Unit is a 32 bit

microprocessorwhich controls the injection

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)

SignaltoEVRV(EGR)

Signal toEVRV(VNT)

Radiator Fans

ACControl

Glow Plug

Service Lamp

ECU&EMSSensors