Technische Daten ARL Motor 150 PS | Posts 16+

I also have a circuit diagram for the ARL that shows where the sensor is located.

How can I make this visible here (word DOc)[/list]?

Fliegerstefan wrote:

a diode, not a resistor? How does that increase the boost pressure? Can it be influenced? Other diodes, etc.?

By reducing the sensor voltage by approximately 0.5 volts (which corresponds to the voltage drop when the device is conducting), without the need to use a more complex voltage divider.

Schottky diodes have a lower voltage drop (~0.3 V) -> resulting in a smaller increase in charging pressure. Connecting multiple diodes in series increases its size -> resulting in a greater pressure increase.

@Ulf:

Quote:

without having to use a more complex voltage divider.

They are commercially produced and are called "Poti" ...

Roger wrote:

Quote: without having to use a more complex voltage divider. They are commercially produced and are called "Poti" ...

Sure, but:

-> 3 connections instead of 2.
-> Tap into 2 cables instead of one.
-> It's also something that needs to be configured, and it's not always clear where to start.

A diode, in my opinion, is a bit more user-friendly - and also easier to explain .

Hello Ulf (and everyone else, of course).

I've now taken a closer look at the connector on the turbocharger pressure sensor.

is a 4. POL cable.

1 brown/blue
2 gray/green.
3 Purple/red.
4 yellow/black.

Connect the wires according to the wiring diagram to the following terminals! (all at the control unit)

1 class, 52.
2 cl 73
3 cl 31
4th grade, page 71.

What is the print signal?

Perhaps someone has a wiring diagram for a different motor and can take a look at it. The terminal markings and, possibly, the colors must be identical!

Thank you.

/search.php

Magic words: Pin assignment, boost pressure sensor.

Thank you for the brilliant idea.

The sensor signal is located at pin 4 of the connector (color yellow/black).

To that extent, Ulf's statement was not entirely accurate.

After I installed the diode, I now have a charging pressure (overpressure) of 1.62 bar.

The standard pressure was 1.5 bar (gauge). VAG COM 2500 mbar)

However, the overly enthusiastic people in the narrow corridors are giving me a bit of a headache.

In this process, the boost pressure temporarily increases to up to 2.35 bar. Even in the standard version, it easily exceeds 2 bar (VAGCOM 3000 mbar).

Also in the 6th grade. Do these pressures still reach up to 2 bar during sudden acceleration?

VAG Com Log.

Speed, Target Pressure, Actual Pressure, Duty Cycle.
2835 2315 2925.0 87.3

Here, the pressure indicated by the diode is about 150 mbar too low.

What do the experts say about it?

The VTG rod was not adjusted. Engine (ARL) has 16,000 km.

Should we perhaps adjust the support rod here to reduce the amount of overextension?


Thank you for your opinion.

Does anyone have experience with such high boost pressures?

Does anyone know anything about ARL engines?

Where are the specialists?

I would adjust the rod slightly towards a slower pressure build-up/less overshoot. While it might start slightly slower, I personally wouldn't want to subject my charger to those peak pressures of 2.35 relative / 3.35 absolute too often.

Regards,
Guste.

Hello Guste,

Thank you for your opinion. I also think that makes sense.

Do you have any idea how to best access the can?

From above, it's not even visible on my Bora 4 Motion.

Does it come from below?

Regards,

Stefan.

Oops.

I completely missed the thread. I have no idea how you're managing to do that. Sorry. But I think you'll figure it out somehow.

Regards,
Guste.

guste100 wrote:

Oops, I completely missed the thread. I have no idea how you're managing to do that. Sorry. But I think you'll figure it out somehow. Regards, Guste