NefMoto > Technical > Tuning > Why did VW calibrate PID differently between transverse and longitudinal 1.8T ?
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Author Topic: Why did VW calibrate PID differently between transverse and longitudinal 1.8T ?  (Read 6201 times)
elRey
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Why did VW calibrate PID differently between transverse and longitudinal 1.8T ?

Can someone explain the reasoning?

KFLDRQ0 (P)
KFLDRQ1 (I)
KFLDRQ2 (D)


Transverse on the left, longitudinal on the right:
« Last Edit: October 04, 2015, 12:35:44 PM by elRey » Logged
zillarob
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Longitudinal vs lateral G's acting upon the mass of the wg?

Just kidding  Grin
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elRey
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Ha.

I'd like to see 2.7t versions.
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zillarob
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Sounds like there are different methods to tune pid's.
I wonder if a computer tuned all three at the same time for the one on the left, and maybe a human tuned the one on the right in 3 individual steps?

Been trying to get my head around this stuff lately, and the one on the right made me think of this
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!nfern0
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Audi TT 1.8T BAM
Quote from: elRey on October 04, 2015, 12:34:04 PM
Why did VW calibrate PID differently between transverse and longitudinal 1.8T ?


I think it's a simple answer: They were calibrated by two different engineers.
The better one is the left because of this simple rule: a map should always be as flat as possible. steep gradients are not good for interpolating. and an ecu is always interpolating on maps.
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userpike
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Could it be that since ME7 is load based that the PIDs for the different versions are the way they are because of vehicle weight? i wonder if they are the same for the FWD 2wd versions compared to quattro in the Audis and 4motion in VW. I want to add that I just realized the comparison above is between a sports car and a passenger car. Maybe the the oem tune is slightly more aggressive in the TT
« Last Edit: October 09, 2015, 07:04:43 AM by userpike » Logged
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