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BlackT
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« on: October 08, 2019, 11:35:57 AM »
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My BEX(8E0909518AH) have a really strange PID control. It works really well on stock tune (it boost only 0.6 bar tru all RPM range) But as soon i lift a boost it is hard to control turbo. Stock file,only I lifted LDRXN  when I look at stock maps, I don't know where to start  Sooo, schould I try to fix this maps, or to copy values from older ECU. And do i need to define more maps for PID control |
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nyet
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« Reply #1 on: October 08, 2019, 11:41:39 AM »
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Post the rest of your logs. Pull IMX so there isn't so much overshoot.
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fknbrkn
Hero Member
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mk4 1.8T AUM
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« Reply #2 on: October 08, 2019, 11:46:26 AM »
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Stock dimx capped to 64% @mid range with last 1000mbar axe
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BlackT
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« Reply #3 on: October 08, 2019, 12:10:49 PM »
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Logs from first post are with original turbo, but Yes i tried to pull down imx, didn't make any differnce. Problem is, that this ECU use KFLDRL as some sort of gain map( look at low values input is 20% Dc output is 50% DC and so on) This is with other turbo, standard k03-029   |
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nyet
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« Reply #4 on: October 08, 2019, 01:55:07 PM »
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How can you possibly know what is going on w/o logging the PID variables?
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BlackT
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« Reply #5 on: October 08, 2019, 11:00:21 PM »
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How can you possibly know what is going on w/o logging the PID variables?
I don't have RAM location of these  ;ldimn_w ;{BoostPID-I-Min} ; {Aktueller Wert zur Minimalwertbegrenzung I-Anteil LDR}
;ldimx_w ;{BoostPID-I-Max} ; {Aktueller Wert zur Maximalwertbegrenzung I-Anteil LDR}
;ldimxa_0 ;{BoostCorrectFactorPID-IRange1} ; {Adaptive Korrektur der LDR I-Regler Maximalwertbegrenzung}
;ldimxa_1 ;{BoostCorrectFactorPID-IRange2} ; {Adaptive Korrektur der LDR I-Regler Maximalwertbegrenzung}
;ldimxa_2 ;{BoostCorrectFactorPID-IRange3} ; {Adaptive Korrektur der LDR I-Regler Maximalwertbegrenzung}
;ldimxa_3 ;{BoostCorrectFactorPID-IRange4} ; {Adaptive Korrektur der LDR I-Regler Maximalwertbegrenzung}
;ldimxa_4 ;{BoostCorrectFactorPID-IRange5} ; {Adaptive Korrektur der LDR I-Regler Maximalwertbegrenzung}
;ldimxak_w ;{ChargeLimitPID-I} ; {Aktueller korrigierter Begrenzungswert I-Anteil LDR}only this if could help Some of my play with IMX and KFLDRL to see how will behavier |
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« Last Edit: October 08, 2019, 11:30:25 PM by BlackT »
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soul87
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« Reply #6 on: October 10, 2019, 12:52:51 AM »
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start of boost looks ok now, no overboost. Raise IMX for higher RPM, because it back to dynamic mode when Ide > UMDYLDR BEX PIDs are crazy  they are designed for K03s (k03-073) only and for lower boost. BFB pids works better. |
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« Last Edit: October 10, 2019, 12:55:05 AM by soul87 »
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BlackT
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« Reply #7 on: October 10, 2019, 02:16:44 AM »
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Yes it is okay for now till 5-6 gear,as soon it get close to req boost it tapers down WGDC really strong... but I am going to copy PID values from some other ECU BFB or AWT. Becuse fixing this will take too much time. And maybe there is some hardware issue, it looks like turbo is too sensitive on DC change  And it make a same boost at high rpm-s when i discconect WG hose. As it makes when everthing is conncect and WG is operating at 70%  forensic anthropology salary ukAnd this is boost when WGDC is 0%, soo i consider that WG perload is good  |
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soul87
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« Reply #8 on: October 10, 2019, 03:42:06 AM »
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Copy PIDs IMX and LDR map from BFB, not AWT and tune IMX . I have ram PID variables for BEX ecu If You want to fine TUNE IMX but I can share it at today evening
BEX LDR map is hard to tune cause it raise 80-85% I limit to 95%.
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« Last Edit: October 10, 2019, 03:49:42 AM by soul87 »
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BlackT
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« Reply #9 on: October 10, 2019, 05:50:19 AM »
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If you have RAM locations that would be great. As well as PID maps locations, beacuse I am not sure are my good
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« Last Edit: October 10, 2019, 01:27:35 PM by BlackT »
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nyet
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« Reply #10 on: October 10, 2019, 12:57:33 PM »
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still oscillating even though IMX is low, issue now is tuning Q0, Q0S and Q2  Its not easy... even if you numb DRL response (slope) you may still have ringing, or even make it worse. |
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soul87
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« Reply #11 on: October 11, 2019, 12:58:27 AM »
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imho its osciliting because IMX is too low... boost drops below requested and after few sec IMX adaptation try to raise boost?
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BlackT
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« Reply #12 on: October 11, 2019, 01:59:50 AM »
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BTW i loose I little bit a WG acuator it looks like it was too stif. Going to take some logs
edit:
YES actuator was to stiff, now the boost looks more realistic acording to DC
But I am not clear why does not PID raise DC when actual boost is below desired?
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« Last Edit: October 11, 2019, 06:48:11 AM by BlackT »
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BlackT
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« Reply #13 on: October 11, 2019, 01:49:06 PM »
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Ok i think I did it. It is really close to perfect. Car puls realy linear and so great. I am really satisfact
Need a little more play with numbers for fine tuning, but for now is great
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prj
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« Reply #14 on: October 11, 2019, 11:32:21 PM »
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Sorry but this looks horrible.
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