0,232er Düsen | Posts 16+

Hi,

from a spacer for guiding the [component] / and a new sleeve for the resting position of the second nozzle opening stage. Furthermore, the price includes the adjustment of the nozzle opening pressure and the installation of the nozzles into the nozzle holder.
Sure, I could just slap some nozzles on for a customer, like some other people do.
But does that always lead to a reasonable result?

You can find 0.216 nozzles here:
http://shop.dieselschrauber.de/product_info.php/cPath/35_36/products_id/77

Best regards, Rainer.

Neubaupe wrote:
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.


You are confusing the injection pressure with the opening pressure.
Since injection processes, due to the elasticity and pump characteristics, can never be purely digital, a time-extended pressure build-up occurs during the start of the injection process.
To prevent the nozzle from dribbling like an old man during pressure buildup, there's the opening pressure. Until then, the nozzle is closed. The injection pressure is then determined by the nozzle opening and the volumetric flow. Even in the good old AAZ engine, this was already over 600 bar... The opening pressure was probably around 180.

Neubaupe wrote:
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.


You are confusing the injection pressure with the opening pressure.
Since injection processes, due to the elasticity and pump characteristics, can never be purely digital, a time-extended pressure build-up occurs during the start of the injection process.
To prevent the nozzle from dribbling like an old man during pressure buildup, there's the opening pressure. Until then, the nozzle is closed. The injection pressure is then determined by the nozzle opening and the volumetric flow. Even in the good old AAZ engine, this was already over 600 bar... The opening pressure there would have been around 180.

Hi!

I understand that the pressure displayed on a graph will not show a rectangle.
and the injection pressure is equal to the opening pressure only at the moment of opening.

I was wondering what the effect of increasing the injection pressure of the pump would be.
It would have an impact on the atomization process and, consequently, on the combustion process.

Since I'm increasingly unsure, could someone please confirm that...
Finer fuel atomization has a positive effect on the engine's noise emissions.
impacts!
(Positive is to be understood as meaning 'quiet'.)

Best regards.
Peter.