Page 329 - Mechanic Diesel - TT

MECHANIC DIESEL - CITS

For manual operation engine have an inline pump and system work there for individual diesel supply in engine
cylinder. For new updated engine use EDC system, it means electronic fuel supply system use in modern engine.
These type engines install some wiring harness for different types of working. These system is known as EFI
(Electrical Fuel Injection) system.

EFI system requirements have system rely on various sensors to keep thing smoothly. From crank and cam
sensors to coolant and intake air temperature sensors, these components work together to ensure your engine
receives the right amount of fuel at any given movement.

EFI includes sensors, actuators, wiring harness and an engine control engine (ECU) to precisely regulate fuel
flow based on various engine parameters such as temperature, airflow and throttle position. It is a vital part of
improving engine performance, fuel efficiency and emission control compared to older carburetor system.
The wiring connection in engine always directly connected with ECU to battery. Due to these reason, you should
always connect the main power and ground for the ECU directly to the vehicles battery. By the connecting the
unit’s main power and ground this way, the battery acts as a capacitor, which filters the power going into the ECU.
Electrical control units (ECU)

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CITS : Automotive - Mechanic Diesel - Lesson 98 - 103