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elRey
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« Reply #15 on: August 12, 2010, 01:45:44 PM »
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KFFDLBTS all 0 would mean you disabled the Lambda changes on ignition eta. Yes, it was disabled. Now it's enabled and the engine runs better. Timing is also affected. I understood it as timing (delta-timing) was an input only and not directly affected. |
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« Last Edit: August 12, 2010, 04:31:46 PM by elRey »
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Goszu
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« Reply #16 on: August 13, 2010, 04:27:59 AM »
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Maybe you are right. Don't know if it's related.
Sience I didn't figure out how the timing model works yet I can't discuss it.
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hammersword
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Revlimit ECU tuning
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« Reply #17 on: August 15, 2010, 05:40:23 AM »
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for example in 1.8T in extreme setups, I tune like that
1) deactivate KFFDLBTS
2) deactivate KFLBTS
tune only with LAMFA
for more safe maping, I leave BTS and make it little bit richer than LAMFA but increase the activation EGT threshold.
for example if lamfa is 0.828 at 6500, I make lamfa to 0.805 at 6500
Tuning these maps is not something standard, but is how a tuner want to tune an engine!
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Tony@NefMoto
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2001.5 Audi S4 Stage 3
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« Reply #18 on: August 26, 2010, 10:52:52 AM »
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I've tuned my AFR using KFLAMKR and KFLAMKRL. KFLAMKRL is the lambda target based on knock correction, and KFLAMKR is the scaling factor. I've tuned the two maps to give me an enriched lambda under heavy load, and to enrich further based on knock.
I chose not to use KFLF because that affects the AFR under all conditions; it is the basis of all calculations for fuel injection based on load.
I never bothered with LAMFA because the driver requested power axis was wrong in my base tune. Driver requested power is from 0 to 100%, but the axis in the map is from 0 to 1.
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« Last Edit: August 26, 2010, 02:35:49 PM by Tony@NefMoto »
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overspeed
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« Reply #19 on: August 26, 2010, 02:04:44 PM »
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That´s what I Guess the line of thinking of Bosch engineers to make ME7:
How do I make the best torque ?... with lambda about 0,90~0,95 ! just the way LAMFA work...
Only when the temperature raises -something that the temperature model see as a maximum power demand (note I´m not speaking WOT) the ECU enrich (via KFLBTS) to ensure maximum power, and if there is some extra temperatura issue it will protect with (KFDLBTS ans KFFDLBTS).
If you modify the way Bosch managed to Work you´ll lose some kind of protection ou function...
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hammersword
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Revlimit ECU tuning
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« Reply #20 on: August 29, 2010, 07:33:43 AM »
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if you want to tune via load the mixture, different mixture at 140% or at 160% or at 185% you can see at "steady map GAS temp" and make the EGT over TABGBTS value,
if that map read a value over TABGBTS then BTS enable and you tune only with KFLBTS, a proper tune on KFLDLBTS must be done!
Each tuner tunes different the ME7, but fistly you have to understand how ME7 work. For me took me a lot of time!
Each project needs totally different ECU calibration and for big turbo application you have to go off from "how bosch do it"
So....
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overspeed
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« Reply #21 on: August 29, 2010, 10:05:54 AM »
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Well, I´ll desagree
Bosch know how to make ECU... you can work as it was created without lose any protection.
There is one way to make ME7 right, there is some other ways to ME7 work nicely...and a plenty ways to make ME7 work... but just work... implies in lose something that Bosch project for security or economy or emission...
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Rick
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« Reply #22 on: October 01, 2010, 12:54:16 PM »
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I've tuned my AFR using KFLAMKR and KFLAMKRL. KFLAMKRL is the lambda target based on knock correction, and KFLAMKR is the scaling factor. I've tuned the two maps to give me an enriched lambda under heavy load, and to enrich further based on knock.
I chose not to use KFLF because that affects the AFR under all conditions; it is the basis of all calculations for fuel injection based on load.
Tony, From the above are you saying that you enrich when Knock is detected, ie when the engine is knocking, then it must be under high load. In that case, this will need retuning every time you alter the ignition map, as there will be different levels of knock correction depending on how much advance you have dialed in? Correct me if i'm wrong. It's an interesting concept, but being able to enrich due to EGT is nicer I think. What happens when you exceed the EGT threshold, do you disable it? Rick |
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Rick
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« Reply #23 on: October 01, 2010, 01:23:28 PM »
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I think the idea behind LAMFA is the WOT fuel-enrichment and not a base fueling map (like on many other ECUs).
This is why LAMFA depends on torque demand (by pedal) and not (actual) load. Demand is always ahead of actual load (timely)
I thought LAMFA IS the part throttle/main AFR map. If not, what is? Rick |
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Tony@NefMoto
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« Reply #24 on: October 01, 2010, 05:28:10 PM »
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Tony,
From the above are you saying that you enrich when Knock is detected, ie when the engine is knocking, then it must be under high load. In that case, this will need retuning every time you alter the ignition map, as there will be different levels of knock correction depending on how much advance you have dialed in? Correct me if i'm wrong.
It's an interesting concept, but being able to enrich due to EGT is nicer I think. What happens when you exceed the EGT threshold, do you disable it?
Rick
My enrichment map based on Load and Knock allows me to force the ECU to add more fuel when knock is detected at high loads. I have tuned the ignition map when knocking to reduce timing compared to the non-knocking ignition map. Ultimately I think you need to have a good baseline target AFR, and then allow the different enrichment maps to add fuel anytime something bad happens. I think enriching based on knock, EGT, IAT, etc, are all probably useful. |
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DigiFather
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« Reply #25 on: October 14, 2010, 09:22:56 AM »
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tested some 551K,Q box and LAMFA not working good in this ecu.
in 1.8T working great , but on this not
set 0.8 at high load but it working on low loads too, tested all rows because think my rows as mixed but not.
EGT model was turned off.
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elRey
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« Reply #26 on: October 15, 2010, 07:31:34 AM »
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tested some 551K,Q box and LAMFA not working good in this ecu.
in 1.8T working great , but on this not
set 0.8 at high load but it working on low loads too, tested all rows because think my rows as mixed but not.
EGT model was turned off.
LAMFA is requested load, not actual load. So, depending on pedal input and KFPED, you could be 'requesting' high load while actual load is still low. And thus LAMFA is requesting 0.8 at low actual load. Reason I don't like LAMFA. |
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turboskipper
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« Reply #27 on: October 15, 2010, 07:47:04 AM »
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LAMFA is requested load, not actual load. So, depending on pedal input and KFPED, you could be 'requesting' high load while actual load is still low. And thus LAMFA is requesting 0.8 at low actual load. Reason I don't like LAMFA.
I agree. I tried using LAMFA with limited success. I was looking into using LAMBTS (component protection) but I actually really like Tony's idea using the knock activity based fueling. Seems you could change the axis so that at 0 knock activity you can define a single axis of fueling relative to RL. Then keep additional fueling for high knock activity. This does not really reduce the ME7 feature set and allows us to tune a desired lambda indexed by RL. |
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cam
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« Reply #28 on: September 20, 2011, 03:44:45 PM »
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In my 1.8T ecu (8N0906018AE) LAMFA doesn't work - idle and with part throttle i have about 0.945 (via LAMBTS) but in WOT i have about 1.020 and trying to set lower but ecu don't listen my wishes  Can be solved via KFLBTS? I am not sure i have KFLAMKR - i can't find that maps |
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nyet
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« Reply #29 on: September 20, 2011, 03:47:57 PM »
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Can be solved via KFLBTS?
Definitely. I do all my WOT fueling via KFLBTS. It may not be the best way (I'm positive there are other ways), but it works for me. |
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