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Author Topic: KFVAKL/KFBAKL, Idle and Throttle  (Read 5263 times)
ricekikr
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« on: November 17, 2015, 05:40:24 AM »

KFBAKL and KFVAKL

Are they constants or multipliers

KFVAKL - Larger numbers = more fuel not less right?

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IDLE:
Is there a map that dictates when the throttle starts controlling idle coming from higher rpms? My idle undershoots it's target when coming from higher Rpm (fx400 flywheel). I want the rpm to drop quickly from high rpm then drop slower around 1100rpm and settles at idle.

What does target speed to prevent boiling (NSKS / NFSTMUB / NFSKS) do?


Where is KFMRES/K categorized (ignition/idle/throttle etc)? I'm having difficulty finding a similar map for an ME5

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Throttle:
Is there a throttle size multiplier or do all the airflow maps need to be replaced?

Feedforward control = PID?

 
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aef
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« Reply #1 on: November 17, 2015, 06:08:08 AM »

Read this:

http://nefariousmotorsports.com/forum/index.php?topic=2438.0
http://nefariousmotorsports.com/forum/index.php?topic=5238.0
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nyet
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« Reply #2 on: November 17, 2015, 12:55:28 PM »

Feedforward control = PID?

Feedforward (open loop) is the opposite of feedback (PID)
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ricekikr
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« Reply #3 on: November 17, 2015, 11:29:25 PM »

Forgot to mention I'm M592

Is KFMRES/K categorized as feedforward? I probably don't have a KFMRESK since I don't have a clutch switch.

I found a throttle map that could be similar

Category: LLRV : A284 . 0 idle control : air feedforward (LLRV: A284.  0  Leerlaufregelung: Luftvorsteuerung)
Map ID: DQSAN Air feedforward thrust Reserve dep. of speed (Luftvorsteuerung Schubreserve abh. von Drehzahl)
Map size: 8 (rpm) x 1 (kg/h)

Map values are all zero though

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dream
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« Reply #4 on: December 15, 2015, 07:38:51 AM »

I got the same issue and I am working on it to get it fixed but couldn't fix it with KFMRES so far also tried to adjust fueling at that point which turned out to be a little better.

My setup is way different from stock and the only issue that remains is that if it reaches 90 degrees I decelerate and declutch between 1250-2000rpm the engine stall most of the time. Sometimes it does lacks at +/- 600rpm and raises up to normal again.
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ricekikr
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« Reply #5 on: December 16, 2015, 06:35:57 PM »

Forgot to update this. Fixed mine by upping accel enrich and timing a bit at <1000rpm. Couldn't find a similiar KFMRES/K map for the M592.
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