Describe the working of electronically controlled diesel injection pump.

Describe the working of electronically controlled diesel injection pump. 
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Answer: Electronically controlled diesel injection pump: This is similar to conventional pumps, but its injection is controlled by Electronic Control Unit (ECU) which control solenoid valve in the injection pump. The pump speed and timing sensor is mounted on the end of the pump camshaft. The ECU receives signals like accelerator pedal position, engine and road speeds, gear selected, start of injection, control rod position, induction manifold, and fuel temperatures etc. Generally ECU output is the current to the solenoid valve for actuating the pump control rod, and to the injection advance and retard mechanism. Based on these data, the ECU accordingly modifies the current to the solenoid valve, to supply fuel as per requirement.

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