Regeneration nach km

Octavia 3 RS DSG, manufactured in May 2016, engine code CUNA, EU6 emissions standard.

Can someone tell me at what mileage the regeneration process starts on my engine?
(Unless it is triggered by calculated or measured soot mass.)

I'm asking because I had a new engine installed, including a DPF, but the registered ash mass corresponds to the mileage on the car's odometer.

The regeneration process is controlled by the amount of soot. Depending on which limit is reached first, approximately 24 grams (this varies depending on the engine), either the measured or the calculated soot mass triggers the regeneration process.
What is the recorded ash content, and how many kilometers are on the odometer?
hg
Herbert.

Wenn aber die Rußmasse nicht innerhalb von x Kilometern nicht erreicht wird, wird doch auch irgendwann trotzdem generiert. When is that?

Or is my information really wrong?

I would like to determine whether it makes sense to adjust the specified ash content value.

TTaurus wrote:

I would like to determine whether it makes sense to correct the set ash content value.

Hello,

If the engine and DPF are new, they should also be reset because the control unit also uses an ash accumulation value.
This value inevitably increases with each regeneration cycle. Consequently, the engine control unit reduces the regeneration interval based on the ash content; therefore, this cycle occurs at increasingly shorter intervals.
Ultimately, resetting the system will significantly improve the regeneration/lifespan of the DPF. The potential increase in ash content will be considerably reduced.

Regards, Mpire.

I would have thought it was exactly the opposite.

Since I almost exclusively drive on the highway, I may only experience regeneration at the mileage interval. The measured soot value is always in a negative range, which means that regeneration occurs slightly more frequently than would be expected based on the actual amount of ash.
That would only be beneficial for the DPF, right?

I don't have problems with oil dilution, but rather a slightly high oil consumption.

There is no mileage limit, but the discussion seems pointless here.
Without the entered ash values, it's impossible to make any kind of assessment.
hg
Herbert.

Octavia 3 RS DSG, manufactured in May 2016, engine code CUNA, EU6 standard (with SCR system).
142,000 km, 0.13 liters.

IDE00432 Particle filter: Time since last regeneration 4785 seconds.
IDE00433 Particle filter: Oil ash volume 0.13 l.
IDE00434 Particle filter: Calculated soot mass = 8.33 g.
IDE00435 Particle filter: Soot mass measured -0.13 g.
IDE00436 Particle filter: Kilometers since last regeneration: 100494 km.
IDE00556 Outside temperature: 4°C.

New engine installed at 89,000 miles/kilometers.

@Herbert: Why pointless? Do you mean only after a change in the engine control unit (ECU)?

I don't actually want to manipulate anything; if anyone should do it, shouldn't it be Skoda?

Aaaah!
With approximately 45,000 km on the odometer (so it's not brand new anymore), under normal conditions, the oil ash volume should be around 0.04 liters.
The oil ash volume of 0.13 liters corresponds quite well to the 143,000 km driven.
The 4-cylinder diesel particulate filter (DPF) is at its limit with a volume of 0.175 liters.
It is obviously impossible to say now whether the reset was forgotten during the exchange, or whether there is an abnormally high amount of oil ash present.
hg
Herbert.

However, if the soot mass is not reached within x kilometers, will it still be generated eventually? When does that happen?

Before software version 23R6, the distance was approximately 1,000 km; now it's about 750 km. When the border is reached, the soot load is virtually set to 100%, which then triggers the regeneration process.

This value inevitably increases with each regeneration, so the engine control unit adjusts accordingly based on how high the ash content is.
Is that correct? Wouldn't the ash content rather increase due to the sole operation of the engine, since the ash primarily originates from the engine oil or its combustion?

Quote:

Before version 23R6, the distance was approximately 1,000 km; now it is approximately 750 km. Upon reaching the border, the soot load is virtually set to 100%, which then triggers regeneration.

Please provide evidence.
hg
Herbert.

Quote:

Is that correct? Doesn't the ash content tend to increase more due to the sole operation of the engine, since the ash primarily originates from the engine oil or its combustion?

My understanding:
The combustion process produces soot that accumulates in the DPF (Diesel Particulate Filter). During regeneration, this soot is converted into ash, which then remains inside the DPF.

Mine started regenerating today after approximately 610 km and 20.24 g of usage, dropping down to 4.3 g within 19 minutes.

@TTaurus
The carbon essentially burns without leaving any ash; it is, after all, an oxidizable substance.
Specifically, the additives in engine oil are not susceptible to oxidation.

@Herbert
What kind of proof would you like to see?
I have, for example, 3 screenshots.
At 979 km, the soot mass was still at 12.4 g (a long highway section of approximately 140 km with significantly less active regeneration due to an exhaust gas temperature of around 450 °C).
2: At 995 km, the vehicle is in the regeneration phase after the soot mass previously increased to 24 grams.
3: At 1012 km, it's almost finished.

With the 23R6 model, this whole process happens at approximately 750 kilometers. It's not particularly complicated to understand.

These are your personal observations, and they are incomplete (it's unclear which soot mass values were calculated and which were measured). The correlation with the mileage comes from the driving profile, and the relationship to the software update is speculative.
Und

Quote:

Der Kohlenstoff verbrennt quasi ohne Asche. Er ist ja oxidierbar.

sh. Charcoal grill.

hg
Herbert.

@Herbert
This is not speculation! These are facts! Dismissing this as speculative reveals a lack of knowledge.

I would like to point out that my statements refer to the calculated soot mass. I have also never observed a case where regeneration was triggered by the measured soot mass.
Of course, the distances between two regeneration cycles are heavily dependent on the driving profile. However, regardless of the driving profile, there are upper limits, as I explained, which have changed with the 23R6 update (along with many other changes in the area of DPF regeneration).
This is at least the current status for the EA 189 models in sizes 1.6 and 2.0.


Regarding your comment about the charcoal grill:
Charcoal still contains all sorts of other substances that are not easily oxidized.
In internal combustion engines, engine oil is the primary source of ash formation, which is why low-ash oils are essential for applications with diesel particulate filters (DPFs).

To avoid things getting out of hand, I suggest the following:

Please provide a Screenshot of your engine's DPF status, similar to the image attached. This is from my EA189 2.0 TDI.

As a second step, please record these data points using your software initially and then after the regeneration process. You can do this through options like "Session Log," etc. VCDS will combine the data into a text file.
Then you can see.
hg
Herbert.

The measurement channels shown in the appendix are familiar to me.

I have actually taken the 'snapshot of the DPF status' that you mentioned - please refer to descriptions 1, 2, and 3 from my post on January 18th at 22:15 (this information is not something I made up or speculated about).

10.3g of ash at 37285 km