Trigger, Fuel, Cranking 1.8t AGU

The logiing freqency of this channel is much too low.
So you can see some oddities on outputs that change freqently.
Based on Nyquist theorem and inejcrors resoltuion meqsured in us, the log frequecy should be 1Mhz+ too show properly injection events.

This logging channel is rather for troubleshooting for our tech support. They will be able to see for example if thebfuel pump output was really on, etc.

If you want to see the inejcrion timing just use v3 built in scope.

Ah ok. That makes sense. Thank you. :+1:

Sorry for probably dumb questions:

  • Where dows EMU take the DBW Target from?
  • How do i change to DBW characteristic #1?
  • It took me forever to find the coolant fan DC correction. But even with that active engine dies. what’s the second thing i have to do to get engine a bit higher RPM for coolant fan? (I have set a activation Delay of 1000ms for coolant fan.)

and one more: afterstart puts my TPS on 0% for a short time which almost kills the engine. any idea why?

Firstly charge DBW blending need to be higher than max target form characteristic will be applied when you off the idle also look what in on Y axis on air flow - it is “target RPM” you cant have lower percentage for higher target or the same value as lower value also percentage on this table there is NOT throttle precent but percent of range between target min and max so your 2% is very very little considering min throttle you have min set to 1.2 percent

Ah. ok. that explains a lot. I will try on Thirsday. Thank you :slight_smile:

Ok. I can’t get it to start. Maybe someone can look through my stuff.

(could’t upload .mp4 so please remove “.txt”) It stalls right after the initial ignition. As if it didn’t have enough air or fuel. I don’t get how to get that higher without changing my base settings though. I tried to raise the cranking threshhold up to 800RPM as seen in emub3 file. Normally it’s on 400-500RPM.

VE-Table for IDLE was set with autotune last week when it started (and probably was a bit warmer)
Airflow-Active state airflow is not really set as well.
Didn’t do anything in ignition and boost so far.

Version: 3.024
Engine: 1.8t AGU 1996 with DBW and TFSI coils.

signal-2024-05-09-235452.mp4.txt (6.1 MB)
20240509_2226_Stall after Start.emublog3 (39.6 KB)
2024-05-09_24_Stall after start.emub3 (53.1 KB)

And question: My injectors have 258ccm @3bar. I have 4bar pressure though so i calculated on the internet that they now have 297ccm. further down i put the base pressure of 400kPa g. Does V3 need the original size and calculates by itslef the Injector size to the base pressure? Or is what I did correct to precalculate the new Injector size?

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The size of injectors should be rated at the base pressure.
If you have fuel pressure sensor then you can use any pressure as the ECU will compensate it.
If you do not have fuel pressure sensor, you neet co calculate the injectors size for the exact fuel pressure you have.