With the help of neat sketch, describe block diagram of Electronic Diesel Control Unit (EDC).
EDC: The ECU determines the correct quantity of the fuel to be injected based on the inputs and the data in the look up table. The fuel input depends on the rack position and thus ECU controls the rack position using a solenoid. The position of the rack is measured and used for feedback. The accelerator pedal position is the input from the driver and a potentiometer is used to sense it. The system can maintain the vehicle speed at any set value. The ECU can also regulate the fuel quantity depending on other conditions like braking. The ECU can also protect the engine against overheating by regulating the maximum quantity of fuel delivered.