Outback L.L.Bean Edition AWD F6-3.0L (2002)
Fuel Injector: Description and Operation
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The MFI system employs top feed type fuel injectors with an air assist feature.
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Each injector is installed in the fuel pipe in such a way that the injector is cooled by fuel.
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The features of this type of fuel injector are as follows:
1. High heat resistance
2. Low driving noise
3. Easy to service
4. Small size
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The injector injects fuel according to the valve open signal from the ECM. The needle valve is lifted by the solenoid which is energized on arrival
of the valve open signal.
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Since the injector's nozzle hole area, the lift of valve and the fuel pressure are kept constant, the amount of fuel injected is controlled only by
varying the duration of the valve open signal from the ECM.
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Fuel atomization is enhanced using assist air supplied from the idle air control solenoid valve passing through the passage formed in the intake
manifold at the area in which each injector is installed. This contributes not only to higher combustion efficiency and higher output but also to
cleaner exhaust emissions.
