0.232 nozzles

Hello,

I ordered the 0.232mm nozzles.
You're here now, and I've noticed that two of the five injector ports are not at the same height as the others.

Is that normal?
Unfortunately, I no longer have the originals and can't check them anymore...
Can someone tell me if this is normal?

Regards,
DJ

PS: Apparently, the nozzles are supposed to produce the same spray pattern as the original AFN injectors.

Hi,

Why don't you ask where you placed the order?
The nozzle holes are not all at the same height because the nozzles are installed at an angle in the combustion chamber.
Did you check the opening pressure after installation?

Best regards, Rainer.

Hi,

I didn't want to ask where I ordered it from, because then the person might just say 'everything is fine' even if they sold me a piece of junk.

But it seems to be okay. Thank you for the quick response!
I haven't installed them yet.
But I have never experienced nozzle installation pressure issues before, how could I?


Regards,
DJ

PS: The 0.232 nozzles go into the bodies (or whatever they're called from the T4 nozzles, there the opening pressure is slightly higher than standard.

Hello dj1!

You are quite risk-taking .

It's not about the nozzles reaching a certain injection pressure. A consistently low or high opening pressure of the nozzles is relatively harmless. However, significant differences in the opening pressures of the various nozzles can be dangerous.

The injection start control loop has only one evaluable feedback signal from the NBF. If the opening pressure of only one other nozzle deviates significantly from that of the NBF, then the actual injection start of that nozzle will be quite inaccurate. That can be quite dangerous for the engine .

To illustrate:
If the opening pressure of an injector is higher than the opening pressure of the common rail, the injection in that cylinder will occur too late. If the opening pressure is lower than that of the nozzle, the injection will occur prematurely.

Depending on the size of the deviation, this can lead to significant shifts in the timing of the injection start for the cylinders.

Regards,
Alex.

Hello dj1!

You are quite risk-taking .

It's not about the nozzles reaching a certain injection pressure. A consistently low or high opening pressure of the nozzles is relatively harmless. However, significant differences in the opening pressures of the various nozzles can be dangerous.

The injection start control loop has only one evaluable feedback signal from the NBF. If the opening pressure of only one other nozzle deviates significantly from that of the NBF, then the actual injection start of that nozzle will be quite inaccurate. That can be quite dangerous for the engine .

To illustrate:
If the opening pressure of an injector is higher than the opening pressure of the common rail, the injection in that cylinder will occur too late. If the opening pressure is lower than that of the nozzle, the injection will occur prematurely.

Depending on the size of the deviation, this can lead to significant shifts in the timing of the injection start for the cylinders.

Regards,
Alex

Hi Alex,

Sure, sounds good - I got it.
But why shouldn't all these brand-new nozzles have the same opening pressure?


Regards,
DJ

Hi,

If the T4 injector holders are new and your new injectors consist of a complete repair kit, including the injector tip and needle, then nothing much should go wrong.

Best regards, Rainer.

Hi,

The T4 injector holders are only six months old, so they are fine.
I don't have a repair kit, just what you mentioned: the nozzle tip and the needle.
I know many people who simply replaced the nozzle tip and needle.


Regards,
DJ


PS: What does a repair kit typically consist of?

Hi.

Quote:

P.S. What does a repair kit consist of?

from the parts that you obviously didn't understand. This is also a way to maximize the profit .
http://shop.dieselschrauber.de/product_info.php/cPath/36/products_id/78

Best regards, Rainer.

Just out of curiosity, I'm using a programmable chip. About 80% of the time, I'm running it without increased boost pressure and without extended injection times. When I need more power (using 0.205 injectors), I activate the chip.
"Larger injectors, specifically 0.216 or 0.232, are coming soon. I believe the 0.216 injectors are acceptable in terms of wear and tear without an additional chip. I don't think there will be excessive wear. But what about the 0.232 injectors? Do you think they are also acceptable without additional tuning (they would provide 0.2 bar more for soot reduction when the "chip" is disabled, while keeping the injection times the same - I have a GT1749VB, so no problem)? Or do you think the 0.232 injectors are too harsh?" I think a 0.216 size should be enough, but I'm not really sure...

PS: Chip "series" and chip "tuning" are/will always be calibrated to the injectors.

How would it be affected if the hole diameter remained the same?
but the opening pressure is being increased.

Basically, I'm thinking about a finer atomization.

However:
How does the increased opening pressure affect the injection duration?
Can the maximum injection pressure of the pump be increased?

Best regards.

Peter.

@neubaupe:

Increasing the injection pressure only results in slightly improved atomization of the pre-injection fuel quantity. With the 2-spring nozzle holders (VP-TDI), the pre-injection duration is also slightly reduced (the period between the start of pre-injection and the start of the main injection).

A higher opening pressure does not affect the injection duration.
The injection pressure of the "pump" depends on the calibration of the system, including the pump, the lines, and the injector.
Larger nozzles generally lead to a decrease in injection pressure (unless a larger pump piston is used).
The maximum pressure is determined by the pump's flow rate and the nozzle opening size.

Regards,
Alex.

Hello Marzocchi,
I would recommend the 232 model. The turbocharger has enough potential to ensure a soot-free combustion, but it's questionable whether an additional 0.2 bar of boost pressure would be sufficient. Especially at low speeds, due to a lack of air and the standard injection timing, you may notice some smoke.
With appropriately adjusted software, even engines with the 232 model could operate without producing soot.
The combination of a VB loader, a 232 ESD, a 10mm pump, and the corresponding software has proven its effectiveness on many occasions.

@donalexo:

Why does increasing the injection pressure on the pump side improve atomization?
'Can't refine it further?'

The most modern diesel engines inject fuel at pressures of up to 1200 bar, while the older AFN engine...
It operates with approximately 200 bar.

Since the degree of atomization is crucial for noise generation.
(aside from engine insulation), the way of thinking seemed to me...
It makes perfect sense that a quieter noise level can be achieved by increasing the injection pressure.


With a constant nozzle opening pressure and simultaneously higher injection pressure.
On the pump side, the pre-injection duration is reduced.
How does the associated earlier main combustion affect the volume?

It is highly likely that the volume reduction is caused by...
the finer atomization is restored by the more intense main combustion, or
the engine would become even louder.


Best regards.

Peter.

Hello Peter,
The most modern diesel engines inject fuel at pressures of up to 1200 bar, while the older AFN engine...
that operates with approximately 200 bar.
'Even the 'old AFN' engine had a main injection pressure of 1200 bar. The opening pressure of the first stage is 190 bar (in the slightly newer 81kW engines, such as the ASV, it's 220 bar).'
Modern diesel engines operate in the 2000 bar range for the main fuel injection.


Best regards,
Rudi

Hi

P.S. What does a repair kit consist of?
from the parts that you obviously didn't understand. This is also a way to maximize the profit .

Greetings, Rainer


Hmm, I keep noticing that there are a lot of scammers and fraudsters online, which is a real shame.
Well, I guess I'll just have to install them like this...

Thank you for your explanations.

Regards,
DJ

Generally speaking, what is the o.g. (the aforementioned) made of? Repair kit, or what was DJ1 denied?
Thank you.
Jan.