Mikey13b wrote:
Hi mate, Im trying to understand the purpose of measuring the air pressure inside the air filter box. Wont the inlet air pressure potentially change dramatically by the time it actually reaches the engine due to other pressure drops in the intake such as the intercooler, and also by the turbo creating a wide variety of boost pressure changes by the time the engine sees it?
Cheers
G'day to you mate!
Not 100% sure of the purpose of the IAP sensor in the air filter box. Marco (Yeti) could probably provide a more detailed answer as to its purpose?
It is used on some other diesel engines with the Bosch injection system.
The ECM may need to know the air density coming into the turbo inlet in order to calculate the correct amount of fuel to be injected for the correct air fuel ratio?
Yes, the pressure changes, but the air density's affects would be the same through the whole intake system I would think.
Just my old power plant operators guess!
Having operated large boilers/turbines for over 40 years, I know first hand how air density (pressure) can greatly affect boiler operation, so I would think it would be very similar in a turbo charged engine?
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