DPF Back Pressure Normal Values

Hello,

To assess whether the DPF requires cleaning due to insufficient fill level or excessive back pressure, I request that users with VCDS provide the following logs/values:
- Engine code or VAG part number of the engine control unit.
- Has the engine been modified or not.
- Distance covered
- Specify ambient pressure and ambient temperature (measurement block 7 and 10 or corresponding extended measurement values).
- Full-throttle log from 1500-4000rpm from measurement block 11, 67 and 68 (or corresponding extended measurements for load, ash and differential pressure) as an unprocessed CSV file.

Example:
[code] - BRE
- Series
- 74,000 km
- 950mBar Ambient Pressure, 5°C In-take Air Temperature

Log file as attachment

Warning:
It has been shown that with increasing temperature in the filter, the differential pressure increases. To find the maximum differential pressure, several acceleration cycles in succession may be necessary. Also, when comparing the difference values, the specific temperature of the DPF is also important.

Thank you + Regards, Rainer

Would it also be of interest to see the total mileage?

The data from my items that have been washed twice are likely not very relevant, or?

Although, it would be a nice comparison; I'll get to logging now.

I hereby declare my intention to join our family's vehicle fleet:
MJ08 BLS Series
MJ10 BMM -Series
MJ07 BMP Series
MJ07 BMR -Series (but with the fourth update already installed)
Provide data.

m;

Benni wrote:

Wouldn't the total mileage also be of interest? The data from my items that have been washed twice are likely not very relevant, or? Although, that would be a nice comparison; I'll get to logging now.

Okay, correct, I forgot. But the DPFs that have been washed 2 times would also be interesting!

I have data blocks 67 and 68, which show a successful regeneration from 45% to 2.2% DPF fill level.

However, there's no mention of the RPM anywhere... and I couldn't really accelerate excessively either.

m;

Hello,

Motor BSS, current mileage 148 tkm.
5000 km ago, the DPF was cleaned using a Kärcher and a new differential pressure sensor was installed.

Environmental conditions: -5 deg C., approximately 990 mbar absolute, DPF freshly regenerated.

Here is a log of the corresponding MWBs, full throttle from t = 20 sec to t = 42 sec in the 4th. Okay.
For those who don't want to go through the log: The max. Differential pressure is 160 mbar at 4400 rpm.

LG Georg

Audi A3 8PA 2.0 CR TDI 103kW
Engine code CBAB
Series
14.000km
Ambient Pressure 950mbar
Intake Air Temperature 21°C

See the difference log as presented by KDataScope.

Hello,

here is the log:

- Federal Republic of Germany
- with a chip
- 88,000 km
- 980mBar to 920mBar ambient pressure, temperature 28 - 25°C
- without cleaning the DPF

Here are the values at max. Differential Pressure
Loading 11%
Ash mass 32 %
Differential pressure: 391 mBar @ 3690 U/min

Attached is the Log, which was originally created for the Lambda evaluation.
With highway and uphill at the end, resulting in different environmental conditions.

SG

Morning!

- BRT (from Sharan 7M, 2010 model)
- Series
- 61,600 km
- 948.6 mbar Ambient pressure, 9.5°C Ambient temperature, 27.0°C Inlet air temperature
- Maximum pressure difference of 260mbar at the DPF

Best regards from Munich!

Hello,

hasn't been written here for a long time - but the thread makes sense...

My DPF is now reporting 61g of ash, and I'm concerned that the part won't survive the June holiday. After all, there are still 1600kg of a second dwelling attached to the Passat. "A full shutdown is absolutely out of the question!"

Here are the facts:
Engine Code BMP
not tuned
DPF mileage: approximately 155,000 km, Engine mileage: approximately 50,000 km (estimated)
Ambient pressure 969 mBar, Temperature 9.9°C, maximum pressure difference of 260mbar
The log was a bit difficult because my wife kicked me three times (despite the manual transmission and DSG).

Thank you very much!

The DPF was just regenerated during the previous trip.
This new ride was only about 10km since the regeneration.
He has been using the 22g load for a while, and I think he'll likely move up to 23 soon.

I'm curious to know if I got the 1500-4000rpm thing right, otherwise I'm happy to repeat it.


- BMM (Golf V, 2007, 2.0 TDI, 140PS)
- Series
- 73300km
- 999.6 mbar Ambient pressure
- 20.7 degrees Celsius ambient temperature.
- 23.4 degrees of suction pipe temperature
- Maximum pressure difference of 245 mbar at the DPF

HI

My BLS is at the stand, engine off, 2.55 mbar differential pressure

Code:

22:39:52 Block 067: Particulate filter (Emissions values I) 18.0°C Temperature before the exhaust gas turbine 30.0°C Temperature in the Particle Filter 2.55 Pressure Difference Particle Filter -5.10 Offset Difference Pressure

I believe that soon there will be two new differential pressure sensors...

m;

dieselmartin wrote:

My BLS is in standby, engine off, 2.55 mbar differential pressure I think there will soon be two new differential pressure sensors...

I would only do this if this error significantly distorts the interesting (!) values during operation.
For example, if only a 20 mbar difference in pressure occurs in a Pmax system, then an error of 2.5 mbar is already 12.5% = a significant amount.

At a Pmax pressure of 200 mbar above the cork, the error would only be 1.25% -> that's perfectly fine for me

Here is a log of 13, 67, and 23 from the first cold start until the engine reached operating temperature.

And another log entry, with values of 67, 69, and 71, recorded during a recovery run.

Hello Hubertus, thank you for the logs.