AU am alten TDI... immer wieder Probleme | Posts 16+

First: Some modern two-stroke engines demonstrably produce less ash than pure diesel fuel.

Secondly, this concerned vehicles that did not have a DPF (Diesel Particulate Filter).

Just Google 'MZ406'.

PS: Diesel additives and system cleaners can contain up to 67% of 2-stroke oil .

George.

Hello.

Here's the translation:

It refers to the "k-value" – that should be the unit. I use vegetable oil, but not in the winter.
I'd like to try the other suggestions (maybe in a year), and of course, I won't forget the feedback.

Sure, here is the translation of the text from German to English:

"Hello."

Hi there,
I'm wondering why you need to achieve a U-value of 0.44 in area A. I find that values are more like those found in country D.
hg
Herbert.

Hello.

Attached you will find the data from the car's registration documents. "Corrected Absorption Coefficient" is the value used as the turbidity factor. There are no units listed, and everything is a bit cryptic.

Here's the translation:

"Also, why should the value be so low – especially for the AEL? For example, in the t4wiki, there's a list that specifies 1.5 for that engine..."

What value are you looking for?

Best regards,

The absorption coefficient, denoted as k (kappa), is defined as follows:
k = (1/L) * l * n * (1 - N/100), where...
k = coefficient in 1/m.
L = Length of the absorption path in meters.
l = Engine displacement in liters.
n = Motor speed in revolutions per minute (rpm).
and N = linear scale value from 1 to 100.

Your vehicle registration documents will state the "allowable value." However, what matters to the TÜV (German technical inspection agency) is the "specified value." As long as you are within the legal limit, everything is fine...

Hi.

Okay, I don't understand that, but did the inspector make a mistake? He entered the value 0.44 into his computer. With one vehicle, I achieved a result of 0.90 (which, in my opinion, isn't bad), and with the other vehicle, it was around 1.5 (normal).

However, I find the approval process for the second vehicle much more interesting. If you look at the same line, it states something DIFFERENT (see attachment).

Does that mean the inspector simply didn't look closely enough?

What would the turbidity value be if we calculated it using the formula (sorry, math isn't my strong suit)?

THANK YOU

Sure, here is the translation of the text from German to English:

"Hello."

The core of the "Pudels Kern" initiative involves changes to Austrian regulations that allow for national standards exceeding EU limits. Austria likely implemented this earlier (edit: in 2004?), and Germany did so on July 1, 2012. (You can search for "AU Richtlinie 2012" for more information).
In short:
- AU limit value = sticker value, indicated on the nameplate (in a rectangular box).
- if not available: manufacturer's specified value;
- if applicable (though not currently in use): 2.5 m⁻¹ for installations before October 1, 2006, otherwise 1.5 m⁻¹.
Earlier, I mentioned a limit of 2.0 for my 1Z engine, which might be the manufacturer's target value since there isn't an official sticker value available.
At Roorback, the 0.44 is likely the value on the plaque.
Are there any suggestions on where to find manufacturer's specifications? These might be of general interest.
Sure, here's the translation:

"Best regards," or "Sincerely," (depending on the context).
Herbert.

"No, Herbert – that 0.44 isn't the turbidity value; we already clarified that above. There's NO indication on the car, so the 1.5 can be used. I always had a 1.5, and currently with my older vehicle, even a 0.8 (which is an EXCELLENT value considering the new measurement range)."

Sure, here is the translation of the text from German to English:

"Hello."

Take a look at this:
http://www.automotive.co.at/ireds-5385.html
hg
Herbert.

INFO from Volvo Austria:

Generally speaking, the specified value of 0.44 is a factory specification and is correct.
However, this is the approved measurement value and not the limit for an exhaust test, which we are aware of.


"If I provide my vehicle identification numbers (VINs), I will receive a written confirmation for my cars."

The fact that the value of 0.44 cannot be correct is evident because engines with a DPF usually have a specified consumption of 0.5 - 0.6.

So, the value of 0.44 refers to the "Bacherach" measurement method, which is no longer used.