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terminator
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« Reply #390 on: July 10, 2014, 04:51:29 PM »
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Thanks for your confirmation! That's a theory, but what values does detazwbs usually contain? Is it possible to log it? And please tell me is my calculation of AFR right? For example if KFDLBTS = -0.2813 lambts = 0.9219 + (-0.2813 * 0.8672) = 0.9219 + (-0.2439) = 0.6779 I'm confused because on high RPM and load, AFR should be 0.15-0.30 according to my calculation  and it can't be. |
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nyet
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« Reply #391 on: July 10, 2014, 05:49:46 PM »
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Thanks for your confirmation! That's a theory, but what values does detazwbs usually contain? Is it possible to log it? Did you bother to check your ME7L ecu config file yet? detazwbs , {} , 0x380BA8, 1, 0x0000, {%} , 0, 0, 0.5, 0, {Delta ZW-Wirkungsgrad f�r Bauteileschutz}
And please tell me is my calculation of AFR right? For example if KFDLBTS = -0.2813 lambts = 0.9219 + (-0.2813 * 0.8672) = 0.9219 + (-0.2439) = 0.6779 I'm confused because on high RPM and load, AFR should be 0.15-0.30 according to my calculation and it can't be. have you logged lambts yet? |
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phila_dot
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« Reply #392 on: July 10, 2014, 06:16:02 PM »
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It's the difference between desired ignition angle efficiency (from zwgru) and actual ignition angle efficiency (from zwist).
It will vary depending on coolant temp, KR, IAT...
I typically see < 3% in logs.
You are looking at worst case scenario numbers.
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terminator
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« Reply #393 on: July 11, 2014, 02:38:51 AM »
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Thank you guys! I was too tired to understand I just need to check detazwbs into ecu file. detazwbs was found by ME7L detazwbs , {} , 0x3848D8, 1, 0x0000, {%} , 0, 0, 0.5, 0, {Delta ZW-Wirkungsgrad fr Bauteileschutz} I havent logged lambts actually, because EGT sensors are dead and disabled. I'm going to resolder contacts and activate the sensors, after I assemble the engine  Thats why firstly I would like to understand how it works. But I think its clear for me now. |
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jibberjive
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« Reply #394 on: July 15, 2014, 04:06:45 AM »
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lambts has nothing to do with actual EGT's or the EGT sensors; it uses an 'estimated' EGT value at the O2 sensor.
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KmosK04
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« Reply #395 on: August 14, 2014, 03:07:20 AM »
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Hello guys. I study the fueling in ME7.5 and I have some questions. In the 180hp stock file the fuel is controlled with lamfa and when the tabgbts>400C with kflbts (am I right?). I've downloaded an OLS from a 225hp bam file and lamfa is the same with 180hp file but the kflbts is deactivated (all 1) and the tabgbts is 820C. How the 225hp controls the fuel?
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bk56190
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« Reply #396 on: August 14, 2014, 09:55:53 AM »
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Read ATM  |
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KmosK04
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« Reply #397 on: August 14, 2014, 09:57:06 AM »
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What's ATM?
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bk56190
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« Reply #398 on: August 14, 2014, 10:04:51 AM »
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ATM: "33.50 Abgastemperaturmodell"
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KmosK04
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« Reply #399 on: August 22, 2014, 07:37:27 AM »
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Thanks a lot for that mate I read the ATM and from my understanting for 225hp engines I tune lamfa and if I want additional enrichment I enable the bts. Am I right?
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carsey
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« Reply #400 on: August 22, 2014, 07:57:33 AM »
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BAM (225bhp) would use lamfa until the threshold TABGBTS is crossed. Then it would use BTS fuelling. 0.97/0.96 fuelling.
Sure its a combination of multiple maps too when on enrichment via BTS.
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bk56190
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« Reply #401 on: August 23, 2014, 09:44:50 AM »
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Thanks a lot for that mate I read the ATM and from my understanting for 225hp engines I tune lamfa and if I want additional enrichment I enable the bts. Am I right?
Yes you're right. When BTS enable, Lambdabts = KFLBTS + (KFDLBTS * KFFDLBTS). |
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KmosK04
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« Reply #402 on: August 23, 2014, 11:13:04 AM »
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Yes you're right. When BTS enable, Lambdabts = KFLBTS + (KFDLBTS * KFFDLBTS).
Thank you. Now I need to understand the torque model :-) |
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Bi-turbo
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« Reply #403 on: September 10, 2014, 02:19:29 AM »
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The purpose of LAMFA is extra torque when requested by the driver. It allows the enrichment of the mixture depending on pedal position/req load.
From the factory it is disabled by setting it to lambda 1 everywhere, and having an unuseable requested torque axis of 0-1%. Reqested will always be above 1% so only this load column gets used. The idea is the factory wanted to run lambda 1 everywhere for emissions and economy, and only enriched when egts' rise. What this means is that if you try and use LAMFA to tune fuel factory axis you will always be rich. Change the axis to 0-100% and now you can set the fuelling according to load, which is how it should be done. For example at 80% req load and above i usually request lambda 0.82, then enrich a little more with KFLBTS.
Rick
Isnt it simpler to just fuel with BTS as its a much larger table so you can have a more defined control over fueling, i use BTS and it works great, i cant see the point in reworking the lamfa axis when you can just leave it as is and use bts...each to there own though |
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ddillenger
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« Reply #404 on: September 10, 2014, 02:29:39 AM »
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Isnt it simpler to just fuel with BTS as its a much larger table so you can have a more defined control over fueling, i use BTS and it works great, i cant see the point in reworking the lamfa axis when you can just leave it as is and use bts...each to there own though
And I assume you've taken KFFDLBTS into consideration? |
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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 experience!
Email/Google chat:
DDillenger84(at)gmail(dot)com
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