NefMoto

Technical => Tuning => Topic started by: technic on March 31, 2014, 06:31:49 AM



Title: what is affecting wdks?
Post by: technic on March 31, 2014, 06:31:49 AM
Hi,

I have an strange situation with my Audi TT 225. At 3000 rpm I completely loose boost and then at 5000 rpm it suddenly comes back. I can see that wdks (and also rlsol_w and wdkba) lowers drastically at this point. No DTC's, no ignition retard and no misfires.

Totally repeatable scenario, It happens every time i floor it on fourth gear.

Any ideas?

I have changed KFMIRL to 200 at max %torque request for test and LDRXN is also well above this value. Torque monitoring is switched off.

Attaced is a me7logger log, both csv and an xls variant. Look at the time 6.25s that is where everything turn off, almost like soft limp  ???.




Title: Re: what is affecting wdks?
Post by: bk56190 on March 31, 2014, 07:05:24 AM
Hello,

I think KFMDBGRG is the problem.


Title: Re: what is affecting wdks?
Post by: technic on March 31, 2014, 07:20:14 AM
I think you might be right. I completely forgot about the gearbased limiters :) Thanks, will try


Title: Re: what is affecting wdks?
Post by: littco on April 01, 2014, 02:40:07 PM
I think you might be right. I completely forgot about the gearbased limiters :) Thanks, will try
throttle cut due to over boost..

Actual is more than desired..


Title: Re: what is affecting wdks?
Post by: technic on April 01, 2014, 02:45:58 PM
I temporarily allowed for quite high boost deviation during testing, so in this case the problem was indeed KFMDBGRG.


Title: Re: what is affecting wdks?
Post by: bk56190 on April 01, 2014, 11:53:45 PM
 Good :)