andre1997
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« on: August 29, 2021, 07:41:31 AM »
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Hello guys, currently I am trying to fit a pair of new injectors. The injectors I want to fit are Bosch EV14 550ccm with a 4bar FPR. I already changed KRKTE and TVUB as follows: KRKTE: 0.051504
TVUB: 3.30 1.62 1.16 0.75 0.54
I think the fuel trims are fine. No big differences in LTFT. However in WOT my BTS is always kicking in. According to the Funktionsrahmen I logged B_tabgbts to see if it gets activated. I got this information from the diagramm LAMBTSENABLE.png in the attachments.  And as expected it gets activated around 2800 rpm as you can see in attachment FlagActivated.png. However if I check the condition for the flag to activate according to the S4 Wiki (Chapter LAMBTS) I can not see why it is getting activated? * KFLBTS_0_A - requested lambda for component protection when calculated EGT (tabgbts_w) is above TABGBTS, modified by FBSTABGM, DLBTS, and KFFDLBTS.
* FBSTABGM (0x150C2) - KFLBTS multiplier. Make sure you change the axis properly to represent your lowered TABGBTS. Again, not necessary if you have a properly scaled MAF. Also, all ones in most files.
* [KF]DLBTS and KFFDLBTS - lambts = KFLBTS + [KF]DLBTS*KFFDLBTS. Therefore, setting KFLBTS to 1 where you don't need it won't disable bts, you also have to set KFFDLBTS = 0 as well.[23] Note that Mbox has DLBTS (2D), not KFDLBTS (3D).[24]
* TABGBTS - Threshold for KFLBTS. Unless calculated EGTs are above this threshold, KFLBTS is ignored. You may have to lower TABGBTS if you have a scaled MAF, since calculated EGTs will be artificially low. My threshhold is still original with 840°C. While it is activating my calculated EGT is 660°C. Also curious is that BTS just shows around 400 rpm later in desired Lambda as you can see in Lambda.png. I am sorry that I do not know how to add images in here ... I also added my log. The tune is bad in my opinion, but I am currently trying to get fueling right. Does someone of you maybe now why BTS kicks in already at EGT of 660°C? Thanks in advance, Andre |
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« Last Edit: August 29, 2021, 07:46:56 AM by andre1997 »
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tao13
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« Reply #1 on: August 30, 2021, 09:54:29 AM »
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How looks FBSTABGM?
When it kicks at 660 the TargetAFRdrivereReq follows KFLBTS or LAMFA?
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Blazius
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« Reply #2 on: August 30, 2021, 12:07:17 PM »
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^ You got it wrong mate, TargetAFRDriverReq=lamfa.
First what is your CWLAMBTS set at? Is tabgm_w or TABGKRM_W is the switching point?
If you dont have cwlambts defined, just log both of these values and you will see which is used as tabgbts_w and you will find your issue likely. If not you will have to look elsewhere.
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tao13
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« Reply #3 on: September 01, 2021, 07:14:04 AM »
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Hi Blazius.
I have the same problem in a audi TT BAM file fuel desire follow LAMFA not KFLBTS.
I use modifications for 5120hack file. Car works greate but i can not change the fuel to KFLBTS. I tried to work with KFLAMKRL and it works but i had a DSG and when the gear changes retards appear and use KFLAMKRL. I deactivated it. So my problem remaining fuel desire follow LAMFA not KFLBTS.
My CondEGTForPartProtection (B_tabgbts) is active when EGTModelBeforeCat(tabgm_w ) is touched like i defined in my file in TABGBTS -630, BUT the problem is the AirFuelRatioDesired ( lamsbg_w ) follow LAMFA not KFLBTS.
LAMSA is leaner than KFLBTS very musch.
TVLBTS is 0
TDLAMBTS = 0
TKATSA = 1229
TABGSS = 1229
KFFDLBTS - all 0
KFDLBTS all 0
I don;t have KAT and rear O2.
EGT sensor is disabled because i use a gt2871, so, egt is calculated.
Can be CWLAMBTS? it is 0 in my BAM file. I saw in AUM (032SG) / AUQ (032HS,032HN) CWLAMBTS is 4 (bit 2 active for tabgkrm). I don't have this TABGKRM_W in ecu definition for ME&logger.
I will try with CWLAMBTS = 4
Please some advice.
Thanks
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Blazius
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« Reply #4 on: September 01, 2021, 11:24:04 AM »
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Hi Blazius.
I have the same problem in a audi TT BAM file fuel desire follow LAMFA not KFLBTS.
I use modifications for 5120hack file. Car works greate but i can not change the fuel to KFLBTS. I tried to work with KFLAMKRL and it works but i had a DSG and when the gear changes retards appear and use KFLAMKRL. I deactivated it. So my problem remaining fuel desire follow LAMFA not KFLBTS.
My CondEGTForPartProtection (B_tabgbts) is active when EGTModelBeforeCat(tabgm_w ) is touched like i defined in my file in TABGBTS -630, BUT the problem is the AirFuelRatioDesired ( lamsbg_w ) follow LAMFA not KFLBTS.
LAMSA is leaner than KFLBTS very musch.
TVLBTS is 0
TDLAMBTS = 0
TKATSA = 1229
TABGSS = 1229
KFFDLBTS - all 0
KFDLBTS all 0
I don;t have KAT and rear O2.
EGT sensor is disabled because i use a gt2871, so, egt is calculated.
Can be CWLAMBTS? it is 0 in my BAM file. I saw in AUM (032SG) / AUQ (032HS,032HN) CWLAMBTS is 4 (bit 2 active for tabgkrm). I don't have this TABGKRM_W in ecu definition for ME&logger.
I will try with CWLAMBTS = 4
Please some advice.
Thanks
KFLBTS 0 ? KFFBTS 0? I think you answered your own question. CWLAMBTS = 4 -> tabgkrm_w is used as the critical temperature CWLAMBTS = 0 -> tabgm_w is used as the critical temperature 032HS 363354 tabgkrm_w - $3849D6 |
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tao13
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« Reply #5 on: September 01, 2021, 11:49:35 AM »
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Thanks Balzius.
not KFLBTS ....i wrote KFDLBTS 0 and KFFDLBTS 0 too.
KFLBTS is ritcher than LAMFA
I need tabgkrm_w for 018H.
Only difference between 018h and 032hs (witch works on KFLBTS after tabgbts was touch) is CWLAMBTS!
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Blazius
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« Reply #6 on: September 01, 2021, 11:57:50 AM »
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Thanks Balzius.
not KFLBTS ....i wrote KFDLBTS 0 and KFFDLBTS 0 too.
KFLBTS is ritcher than LAMFA
I need tabgkrm_w for 018H.
Only difference between 018h and 032hs (witch works on KFLBTS after tabgbts was touch) is CWLAMBTS!
018H 360313 tabgkrm_w = $3849CC |
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tao13
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« Reply #7 on: September 01, 2021, 12:18:24 PM »
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Thanks Blazius.
I made a new log with CWLAMBTS = 4 and made lower TABGBTS = 530 and FBSTABGM afferent to see the difference.
CondEGTForPartProtection (B_tabgbts) activated at 630 degree so used TABGKRM.
BUTTTTTT the fuel desire remaining on LAMFA not switch to KFLBTS!
ANY IDEEA???
Can be from incorect maf scaling?
WIKI said "FBSTABGM (0x150C2) - KFLBTS multiplier. Make sure you change the axis properly to represent your lowered TABGBTS. Again, not necessary if you have a properly scaled MAF."
or "TABGBTS - Threshold for KFLBTS. Unless calculated EGTs are above this threshold, KFLBTS is ignored. You may have to lower TABGBTS if you have a scaled MAF, since calculated EGTs will be artificially low."
I will decrease Tabgbts very much to see what happen!
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« Last Edit: September 01, 2021, 01:28:29 PM by tao13 »
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nyet
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« Reply #8 on: September 01, 2021, 05:47:31 PM »
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Thanks Blazius.
I made a new log with CWLAMBTS = 4 and made lower TABGBTS = 530 and FBSTABGM afferent to see the difference.
CondEGTForPartProtection (B_tabgbts) activated at 630 degree so used TABGKRM.
BUTTTTTT the fuel desire remaining on LAMFA not switch to KFLBTS!
ANY IDEEA???
Can be from incorect maf scaling?
WIKI said "FBSTABGM (0x150C2) - KFLBTS multiplier. Make sure you change the axis properly to represent your lowered TABGBTS. Again, not necessary if you have a properly scaled MAF."
or "TABGBTS - Threshold for KFLBTS. Unless calculated EGTs are above this threshold, KFLBTS is ignored. You may have to lower TABGBTS if you have a scaled MAF, since calculated EGTs will be artificially low."
I will decrease Tabgbts very much to see what happen!
Not sure why you think MAF scaling changes things here... your logged EGT is all that matters anyway. |
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ME7.1 tuning guideECUx PlotME7Sum checksumTrim heatmap toolPlease do not ask me for tunes. I'm here to help people make their own. Do not PM me technical questions! Please, ask all questions on the forums! Doing so will ensure the next person with the same issue gets the opportunity to learn from your ex
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Blazius
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« Reply #9 on: September 01, 2021, 06:55:28 PM »
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Thanks Blazius.
I made a new log with CWLAMBTS = 4 and made lower TABGBTS = 530 and FBSTABGM afferent to see the difference.
CondEGTForPartProtection (B_tabgbts) activated at 630 degree so used TABGKRM.
BUTTTTTT the fuel desire remaining on LAMFA not switch to KFLBTS!
ANY IDEEA???
Can be from incorect maf scaling?
WIKI said "FBSTABGM (0x150C2) - KFLBTS multiplier. Make sure you change the axis properly to represent your lowered TABGBTS. Again, not necessary if you have a properly scaled MAF."
or "TABGBTS - Threshold for KFLBTS. Unless calculated EGTs are above this threshold, KFLBTS is ignored. You may have to lower TABGBTS if you have a scaled MAF, since calculated EGTs will be artificially low."
I will decrease Tabgbts very much to see what happen!
Mate.. You should look again because: 1.B_lambts is active but B_tabgbts is not until 630~. 2.AFR request from lambts is much much leaner than lamfa, therefore it uses lamfa as final desired afr, everything works as it should. Check your calibration again but I highly suggest reading through the s4wiki multiple times.... |
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nyet
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« Reply #10 on: September 01, 2021, 07:37:11 PM »
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AFR request from lambts is ... leaner than lamfa
It really is this simple. |
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ME7.1 tuning guideECUx PlotME7Sum checksumTrim heatmap toolPlease do not ask me for tunes. I'm here to help people make their own. Do not PM me technical questions! Please, ask all questions on the forums! Doing so will ensure the next person with the same issue gets the opportunity to learn from your ex
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tao13
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« Reply #11 on: September 01, 2021, 11:28:20 PM »
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Thanks Blazius.
Blazius in last file /log who i made it, my b_lambts is active and B_tabgbts is touched because TABGBTS was setted at 530 degree and FBSTABTS is defined properly 500 - 0 , 540 - 1.001 , 800 - 1.001 ,900-1.001.
NYET(is simple) and Blazius my AFR request from lambts is ... NOT leaner than lamfa, please see the picture.
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Blazius
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« Reply #12 on: September 02, 2021, 02:24:17 AM »
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Thanks Blazius.
Blazius in last file /log who i made it, my b_lambts is active and B_tabgbts is touched because TABGBTS was setted at 530 degree and FBSTABTS is defined properly 500 - 0 , 540 - 1.001 , 800 - 1.001 ,900-1.001.
NYET(is simple) and Blazius my AFR request from lambts is ... NOT leaner than lamfa, please see the picture.
Go through the FR and s4wiki again. |
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tao13
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« Reply #13 on: September 02, 2021, 03:11:59 AM »
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I saw this, desire follow lamfa table even if lamfa is much leaner than KFLBTS+(KFFDLBTS*KFDLBTS)!
TABGBTS is touched, B_Lambts is active...problem remaining...AirFuelDesire MUST NOT BE LAMFA!
The problem is in other place i think!
Blazius, oplease can you confirm my 2 scallae addreses are correct:
TABGBTS - 0x1CADC
TABG - 0x1CB44
Thanks
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tao13
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« Reply #14 on: September 02, 2021, 09:18:47 AM »
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Something happen only when back to stock with KFDLBTS and made all 1 for KFFDLBTS.
The fuel desire is ritcher than LAMFA but leaner than KFLBTS.
i atached the log and the modification of fuel desire can see at 100% pedal.
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