msdk_w how does the ECU get this value?

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Milka

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	msdk_w how does the ECU get this value? « on: September 28, 2012, 05:40:53 AM »

So have been playing with which variables to log and just wanted to know if anyone knows how the ECU figures out msdk_w? cfg entry below:

msdk_w ; {MassAirFlowAtThrottlePlate} ; {Massenstrom über Drosselklappe (word)}

I am pretty sure that mshfm_w is just an addition of the 2 MAFAirFlow meters again as per the entry below:
mshfm_w ; {MassAirFlow} ; {Massenstrom HFM 16-Bit Größe}

Does it just estimate msdk_w based on boost pressure and throttle plate angle or something?


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thom337

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	Re: msdk_w how does the ECU get this value? « Reply #1 on: September 28, 2012, 06:51:57 AM »

It uses the throttle discharge curve, a flow characterstic map, and a pressure and temperature compensation. In the case of most setups, its using the MAP pressure pre-TB.


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phila_dot

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	Re: msdk_w how does the ECU get this value? « Reply #2 on: September 28, 2012, 07:21:29 AM »

Look at BGMSZS in the FR.


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