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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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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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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