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  1. #1
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    Default Help needed with a few maps

    Hi, I need a bit of help interpreting a few maps from an Alfa GT 1.9 JTDm EDC16C39. The 1st one is IQ limited by coolant temp. Is it the case that if the coolant temp is above -15C and below 118C that this map will be "ignored" and below -15cC or above 118C the limits are used? Or are the limits still used between -15C and 118C?

    IQ_by_Clt_Temp.jpg

    The next one is IQ limited by fuel temp. I think this map is as it appears....IQ is limited based on fuel temp and engine speed. So at a fuel temp of 40C this map would limit fuel to 110mm?

    IQ_by_Fuel_Temp.jpg

    And now for the one I'm really scratching my head over, IQ by temp. I'm not sure how this map is used by the ecu. Common sense tells me that the Y axis "index" value of 1 would be "normal" engine temperature and would allow for 77mm at 1500rpm, 77mm at 1750rpm ... etc. But to be honest I'm really not sure how to handle this map. I did see another map that looked to have a kind of correction index based on temp that I'm guessing tells the ecu where to look in the map above for it's limiting values based on the correction factor index?????

    IQ_by_Temp.jpg

    Hopefully somebody can explain the correct way to handle or interpret these maps....then I'll only have the inner torque and outer torque maps to figure out

    P.S. Sorry if the photos are small...not sure why as they're way bigger on my laptop?
    Last edited by Classictinker; 28th January, 2022 at 10:05 AM.

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    Default

    Hello

    You are right about the 2 first maps.

    In the 3rd map, this axis is something like a security factor, to protect the engine.

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    Classictinker (28th January, 2022)

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    Default

    Quote Originally Posted by biela View Post
    Hello

    You are right about the 2 first maps.

    In the 3rd map, this axis is something like a security factor, to protect the engine.
    Thanks biela. I'm having a look through the edc16 documentation but it's a huge amount of info to wade through .

 

 

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