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Author Topic: Timing Oscillations  (Read 7672 times)
catbed
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« on: June 05, 2013, 09:37:08 AM »

hey all,

Im trying to track down a timing oscillation I'm having, and I'm having a ball since I don't know how to disassemble yet. I have tried going through a ME7L .ecu file and finding all the torque variables I could, but I could only find mifa, misol, and miszul. I (think) I located KFDMDARO and KFDMDADP in my file, and set the 50% row to 100, but the oscillation still persists.

IRL is stock except for last five columns, and IOPs axis has been rescaled and the table re-interpolated using MasterJs tool.

I have attached a log to the post, I welcome any opinions. Disregard the WGDC, that is from KFLDRAPP.



« Last Edit: June 05, 2013, 09:39:25 AM by catbed » Logged
ddillenger
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« Reply #1 on: June 05, 2013, 09:39:58 AM »

No log attached? Also, did you recalculate KFZWOP/2 and KFMDS? They share the axis with IOP.

Posting the actual tables is good. MasterJ's tool doesn't interpolate properly, I tried it but now tend to do it by hand.
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catbed
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« Reply #2 on: June 05, 2013, 09:42:04 AM »

No log attached? Also, did you recalculate KFZWOP/2 and KFMDS? They share the axis with IOP.

Posting the actual tables is good. MasterJ's tool doesn't interpolate properly, I tried it but now tend to do it by hand.

lol, you got me before I could add the log from my VM.

Yes, KFZWOP/2 is recalculated. KFMDS is NOT, however. I recall reading somewhere that is only lower RPM but I could be wrong. Ill take a look for that.

EDIT: tables attached to this post.
« Last Edit: June 05, 2013, 09:51:25 AM by catbed » Logged
nyet
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« Reply #3 on: June 05, 2013, 02:49:20 PM »

You're going to need to log a few more torque variables...

for IOP intervention, mifa/misolv and mibas/mizsolv, for ARMD mkar/nmod/B_ar/B_tvarss/ndar/dmar
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catbed
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« Reply #4 on: June 05, 2013, 03:33:29 PM »

You're going to need to log a few more torque variables...

for IOP intervention, mifa/misolv and mibas/mizsolv, for ARMD mkar/nmod/B_ar/B_tvarss/ndar/dmar

That's where I'm stuck. I don't know the addresses of those variables for my 018CH file.
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catbed
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« Reply #5 on: June 05, 2013, 05:25:17 PM »

Here is another log of the problem. This log really shows the problem.

I found KFMDS earlier, and am interpolating now.
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catbed
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« Reply #6 on: June 05, 2013, 07:33:21 PM »

Since dd mentioned KFMDS, I plugged the stock values into excel and extrapolated the values two different ways. Should I follow the curve or linearize on the load axis?

The curve matching is better IMO, as drag torque still increases with RPM but decreases with increasing load.
« Last Edit: June 05, 2013, 07:37:49 PM by catbed » Logged
catbed
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« Reply #7 on: June 21, 2013, 04:01:16 PM »

I believe I fixed it. My KFZWOP table had a lower value than my KFZW in the same area. Re-interpolated KFZWOP to suit the new axis again and all is well now.
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