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EEC Sub-System
The EEC sub-system consists of the ECA and various sensors and actuators. The ECA reads inputs from the sensors to compute the required fuel flow rate necessary to achieve the desired air/fuel ratio. This is performed by the ECA controlling outputs to the fuel injectors. The period of time that the injectors are energized (injector ON--Time or pulse width) determines the amount of fuel delivered to each cylinder. The ECA calculates the injector pulse width (ON--Time), commands the injectors to fire, delivering the appropriate quantity of fuel required.