Ladedrucküberschwinger 1905mbar / 1911 rpm bei ASZ (19-04-2008, 18:34) | Posts 32+

ASZ-Fahrer wrote:

I logged the MWB actuator diagnosis (log file in the upload). ...significantly faster than 0.5 seconds in both directions! ...from one measurement to the next, and by that I mean from the lowest to the highest LD value and vice versa, for example, with "LD on," I recorded values of 0.421 seconds and 0.374 seconds. In the other direction, with "LD off," I recorded values of 0.225 seconds and 0.247 seconds. That means it will likely take a bit longer to reach a final agreement. Please review my log . ...if that is the case, I hope I am a little closer to identifying the error!

I fear not: by "significantly longer," I meant "much longer in one direction than 0.5 seconds."

"Around 0.4 seconds is not uncommon, and therefore, in my opinion, doesn't explain your overshooting behavior. But how did you actually measure the switching times with a resolution of approximately 2/100ths of a second? The log doesn't provide values with 1/1000th of a second precision."

If I were you, I would now live with the oversteering behavior (with the standard trim settings, a maximum of 0.3 bar is generally still acceptable), or lengthen the VTG rod as described.

ulf wrote:

But how did you actually measure the switching times with a resolution of approximately 2/100 seconds? The log doesn't provide values with a precision of 1/1000 seconds. An Deiner Stelle würde ich nun mit den Überschwingern leben (im Serientrimm sind max. 0,3 bar allgemein noch tolerabel), oder die VTG-Stange wie beschrieben länger drehen.

...it probably has something to do with my label file for version 311.3; I received an improved version of it.

"...I'll probably have to live with the 0.3 bar overshoots. Everything seems to be okay otherwise. However, I was recently rejected for a chip tuning service because they said they "weren't interested" after I explained about the overshoots and ruled out a hardware problem... If this is considered a problem, then it's probably either not a good tuner or just someone who doesn't want to deal with problems... most likely the latter."

ASZ-Fahrer wrote:

ulf wrote: But how did you actually measure the switching times with a resolution of approximately 2/100 seconds? The log doesn't provide values with a precision of 1/1000 seconds. ...it probably has something to do with my label file for 311.3; I received this in an improved version.

Hardly: a label file only provides data headers, but no actual values (timestamps/time stamps).

It was just a minor topic of curiosity and didn't warrant further investigation.