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Author Topic: I want to expand upon KR based fueling in the wiki....  (Read 15197 times)
ddillenger
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« on: October 02, 2013, 08:12:33 PM »

But don't want it to be solely my voice. Please, post some of your work, methods, what you've tried, what you've found works, and what doesn't.

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Snow Trooper
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« Reply #1 on: October 03, 2013, 11:39:47 AM »

I try for zero CF, don't remember what setup this was from but they always end up pretty similar.  KR leads the way when things are ideal, but can enrich very fast if needed.  Lamfa pops a little in early for bad fuel and bts is still active for long pulls by being set high, but reasonable enough to still activate when needed.
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ddillenger
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« Reply #2 on: October 03, 2013, 02:55:21 PM »

Thanks for the input Jared, that's pretty much how mine is setup right now.
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savages4
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« Reply #3 on: October 03, 2013, 03:36:46 PM »

Can you explain what the changes you made to KFLAMKR do?
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stuklr
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« Reply #4 on: October 03, 2013, 05:41:01 PM »

If EGt's are deleted, KFLBTS can't do its job right?

For instance, I have set CDATR/ATS to the max to eliminate egt's. That means theres no further enrichment there and I need to compensate with a more aggressive LAMFA. I have been able to get better cruising mileage and still safe WOT afr's this way.

The results log fine. Seemed the simplest way. 
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savages4
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« Reply #5 on: October 03, 2013, 06:37:47 PM »

No it uses the modeled EGT.  So once it hits whatever TABGBTS is set to it switches over to the BTS map for fueling.
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stuklr
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« Reply #6 on: October 03, 2013, 08:11:34 PM »

Ah, thanks for the clarification. I will try some more changes then. After improvements in econ while commuting, while not hurting WOT.
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julex
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« Reply #7 on: October 04, 2013, 06:56:25 AM »

I run exclusively on KR fueling:

1) Set CWLAMFAW bit 0 to 0
2) change ZKLAMFAW to "100" FFFF. This is very important. Without this, the lambda requests are filtered through time filter and new requested lambda takes time to take effect, as much as 1-2s. If you leave it in stock form, the KR fueling has no chance to work properly as the requested AFRs are severely delayed and you'll be spiraling into more and more knock unless you put low AFRs into table... but that's going to biet you when in different gears/longer pulls. With it being FFFF, it is an instant change. No longer nice and flat AFR curve though, the ECU really starts to work on proper fueling with this in.
3) Adjust KFLAMKRL knock axis so that lowest value is "0.00" - no knock. This will drive your lambda in no-knock situation if you want to pre-emptively enrich the mixture in high loads... it effectively takes over BTS functionality.
4) Perhaps change load axis if you want... you can make this table looking like mini-BTS if you want.
5) come up with some sane KFLAMKRL values... This is where tuning comes into place and what your AFR targets are:

AFR version:
Code:
	40.50	60.00	80.25	140.25	168.00	191.25

0.00 14.70 14.70 14.70 14.70 14.70 12.17
-2.25 14.70 14.59 14.47 14.36 12.75 11.71
-4.50 14.70 14.36 14.13 13.90 12.29 11.48
-5.25 14.70 14.36 14.13 13.67 12.06 11.25
-6.75 14.70 14.36 14.13 13.21 11.60 10.91
-8.25 14.70 14.36 14.13 12.63 11.25 10.68


Lambda version:
Code:
	40.50	60.00	80.25	140.25	168.00	191.25

0.00 1.0000 1.0000 1.0000 1.0000 1.0000 0.8281
-2.25 1.0000 0.9922 0.9844 0.9766 0.8672 0.7969
-4.50 1.0000 0.9766 0.9609 0.9453 0.8359 0.7813
-5.25 1.0000 0.9766 0.9609 0.9297 0.8203 0.7656
-6.75 1.0000 0.9766 0.9609 0.8984 0.7891 0.7422
-8.25 1.0000 0.9766 0.9609 0.8594 0.7656 0.7266
« Last Edit: October 04, 2013, 07:04:27 AM by julex » Logged
julex
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« Reply #8 on: October 04, 2013, 06:57:18 AM »

double post
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savages4
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« Reply #9 on: October 04, 2013, 11:13:17 AM »

Julex, but what about the changes snow trooper is making to KFLAMKR, are these necessary and what do they do?
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ddillenger
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« Reply #10 on: October 04, 2013, 11:31:29 AM »

Julex, but what about the changes snow trooper is making to KFLAMKR, are these necessary and what do they do?


KR is the factor by which KRL is multiplied.
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julex
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« Reply #11 on: October 04, 2013, 11:43:59 AM »

KR is the factor by which KRL is multiplied.

I have it a default "1". I don't see why would you need to change these at all. The matter of fact is that no timing correction kicks in before really high load anyway so his corrections to low load  are pointless...

Look at his maps. Load 80, corrections 0.0. KRL has 12.9 AFR while KR map has 0.0... this effectively nullifies KRL setting and leaves AFR at 14.7. A little silly.

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savages4
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« Reply #12 on: October 04, 2013, 11:46:42 AM »

Can you post a pic of your KR table?  The stock one seems to be 0'd out in many areas which as you say would disabled KR completely for those load/rpm points
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ddillenger
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« Reply #13 on: October 04, 2013, 12:09:27 PM »

Mine is setup similar to Jareds. I don't see the need for KR fueling at low load/rpm's.

You could just set it to 1 I suppose, but why bother with an area that will never see knock based enrichment anyway?
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julex
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« Reply #14 on: October 04, 2013, 12:46:15 PM »

Can you post a pic of your KR table?  The stock one seems to be 0'd out in many areas which as you say would disabled KR completely for those load/rpm points

Apologies, you're right, you need to put 1 in every cell of KFLAMKR table to make sure it doesn't moderate output of KFLAMKRL table. I thought it was the case with stock set up, but it is not.

There is no reason to use KFLAMKR table unless you're doing so strange rpm/load adjustments for how strong the KR fuel enrichment should kick at certain RPMs/load... My taker on it is - always 100% of value defined in KFLAMKRL  table.
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