Engine and vehicle sensors transmit input signals to the ECM by either:โช Controlling a reference voltage to produce an analog or digital signal (i.e. ICP,…
The ECM controls the actuators by applying a (low level) signal to the base of the transistor output drivers. These drivers, when switched on, will…
The Electronic Control Module (ECM) monitors and controls engine performance to ensure maximum performance and adherence to emissions standards. The ECM is also able to…
Some Series 40E electronic engines are equipped with split-shot injectors. On these injectors the injection cycle is executed in two stages. Some fuel is pre-injected…
The injection operation is divided into three stages or cycles:โช Fill stage Injection stage End of injection During the fill stage, the solenoid is de-energized…
The injection control pressure regulator valve is a pulse width (Duty cycle %) modulated valve operating at 400 Hz. The pulse width is modulated between…
The ECM controls the injection control pressure by operating the injection control pressure regulator (IPR). See Figure “Injection Control System” . The result of this…
The Injection Control Pressure system provides the necessary energy to hydraulically actuate the HEUI injector. Engine oil is the hydraulic fluid used by this system…
The fuel supply pump produces the necessary vacuum to draw the fuel from the fuel tanks. See Figure “Fuel System Diagram” . Fuel from the…
The fuel system consists of three major subsystems:โช Fuel Supply System Injection Control Pressure System Fuel Injector These subsystems work together to inject pressurized fuel…