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Discussion Starter #1
how do they regulate the Air/Fule Mix entering the engine? Do diesel trucks have 02 sensors or something else that lets the ECU know if its runing lean or rich? I know that gas cars use the O2 sensors to tell the ECU if its rich or lean.
 

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Diesel Trucks do not have an O2 sensor. But I am not sure how our fuel is metered.
 

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Discussion Starter #3
:bump: :bump:
 

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There is no air fuel mix entering the engine, only air. The fuel is injected directly into the cylinder, hence Direct Injection. The delivery of fuel, amount, and timing is based on several inputs from sensors example: cam sensor (for timing of injection) map sensor (for boost pressure, more air, more fuel can be burned) and of course the pedal position.

Totally different process than gasoline.
 
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