Run AXR without LLM

AXR (Automatic Air Conditioning) manufactured in 2006, installed in a Polo 9N3.
The log data, obtained while the mass airflow sensor (MAF) connector was disconnected, indicated that the soot limit was exceeded.
is not affected. In other words: the car drives based on data and also on the driver's feeling.
running at full power. Apparently, soot reduction is achieved through a combination of lean burn (LD) and engine speed.
determined.

After a 10-minute drive, there was only a single error message, which related to...
"Missing LMM signal, no further entries due to some reason."
emission-related stories.

Although in this scenario, the (replacement) actual value of the air mass is 539 mg/hub.
"When the exhaust gas recirculation (EGR) system is not working correctly, it can result in the actual exhaust gas recirculation rate being significantly higher than the target value, especially at low engine loads."
- The duty cycle is fixed at 4.8%.

Why is that the case?
Is it true that deactivating the LMM (Lambda Measuring Module) is a reliable solution for the AGR (Abgasrückführung - Exhaust Gas Recirculation) issue in AXR engines?
to disable?
Or does the check engine light eventually come on, or does some other problem arise after a longer period of driving?
Problem?

Best regards, Klaus.

Yes, it is possible to control the opacity through the boost pressure. I've seen something like that before on an EDC15U from a 96/130 7M.

Unfortunately, I don't know about the AXR or your software version.


AGR: The engine control unit (ECU) doesn't activate the AGR valve because it doesn't know the actual air mass value. It could just as easily be only 200 mg/stroke. If the AGR valve opens in that situation, the engine will stall at idle.

I've only seen this in EDC16 engine control units (ECUs), where there are both a map for quantity limitation via the mass airflow sensor (MAF) and a map for quantity limitation via boost pressure.

vwSchrauber wrote:

Yes, there is a possibility to control the smoke output via boost pressure.

I've seen something like that before on an EDC15U from a 96/130 7M.

Quote:

The EU4-96kW PD (BLT) also uses boost pressure for smoke control, as do the ASZ and BTB (110kW) in the Sharan, and (if I remember correctly) at least one 3-cylinder TDI in the Polo 9N platform.

I don't know what the AXR is, or what your software version is.} I don't know if all AXR units are affected by LD, but at least some of them are.

...
Is it true that deactivating the LMM (Lambda Measuring Module) is a reliable solution for the AGR (Abgasrückführung - Exhaust Gas Recirculation) issue in AXR engines?
to disable?


No.


Or does the check engine light eventually come on, or does some other problem arise after a longer period of driving?
Problem?

Yes!

You will eventually receive an implausible LMM (Lambda Multi-Point) signal. This will likely happen when the EGR (Exhaust Gas Recirculation) valve is supposed to be open for an extended period, but the air mass remains unchanged.

Klausel wrote:

Is it true that, with the AXR, deactivating the LMM is a reliable way to disable the EGR system?

Due to a similar topic in another forum, I am currently interested in how the AXR (and BLT?) would react if you disconnect the hose from the EGR valve and seal it.
A possible solution would be for the MSG (Motor Supervisory System) to close the DK (Diesel Combustion Chamber) to such an extent that the desired LuMa (Load Management) setpoint is reached. However, without the addition of exhaust gas, the compression would be insufficient, which could potentially lead to new jerking problems.
This should be reflected in the MWB3.
Has anyone ever logged the MWB3 (module for waste heat recovery) of an AXR/BLT engine with the AGR (selective catalytic reduction) system deactivated solely through hardware modifications?