Parameters for Ulf test directly from the control unit?

Hello everyone!

Has anyone ever considered finding the exact time for Ulf's power test using the diagnostic interface? Wouldn't it be 'simple' to just capture the engine speed data and have a small program measure the time? VAG-COM itself is supposed to be able to log data from the control unit, but I've never really looked into it. What do you think? I'm curious to see!

Regards,
Max.

That's exactly what I intend to do. Possibly even a custom program to query the speed via the diagnostic interface.
Essentially, it's like the Ulf's penetration test, but as a Windows program.
Today, my laptop finally arrived!


Best regards, Rainer.

...congratulations!!!
That's great news. Please keep me updated if your project has been successful.
Wishing you a good performance!
Regards,
Max.

Can VAG-COM be used to log the necessary data for a flow test?
Sure, here's the translation:

"For example, torque curve, RPM, etc.?"

Now that my VAGCOM device has arrived, thank you Rainer, I'd like to experiment with it and test the program. I thought the test would be a good fit for that purpose.

Hi,

I performed all my DRZ tests exactly like that. VAG-COM outputs approximately 2.5 measurements per second, from which the time required to accelerate from 2000 to 4000 RPM can be calculated with enormous accuracy using interpolation.

It's not really a big problem, although a program like the one Rainer envisions would certainly be helpful.

Okay, I understand. Please provide the German text you want me to translate into English. I will only provide the translation.

That was the relevant thread two years ago, and I still have the logs online, so people can practice interpolation using them - the simple formula is further down in the thread.

Best regards,

Jan.

Hi Jan,

Okay, but that's a silly question. How exactly do I log the relevant data?


You didn't log the torque curve, or is that not possible?
Writing a program that performs the necessary calculations from a LoFile and, if necessary, also calculates the ULF penetration test is not that difficult. It's usually more difficult to obtain real-time data directly from the engine control unit.

Regards,
Henrik.

Hi,

Just select the relevant measurement group and click "Start"... or are you asking something else? The feature that allows you to achieve this is called "Measure Blocks" or something similar - I don't have Windows at hand right now to try it out.

The "Marker" function is very useful - you move the mouse (TrackPoint or touchpad on a laptop) to "Marker" and then simply click blindly before the start of each trial. It then becomes easy to find the experiments within the vast amount of data.

However, it's important to make sure the computer is stable on the seat, as the acceleration will push it backward.

Best regards,

Jan.

x world one wrote:

Hi Jan, Okay, but that's a silly question. How exactly do I log the relevant data? You didn't log the torque curve, or is that not possible? Writing a program that performs the necessary calculations from a LoFile and, if necessary, also calculates the ULF penetration test is not that difficult. It's usually more difficult to obtain real-time data directly from the engine control unit. Regards, Henrik

Hi,

You have Mail: This is the current German manual for VAG-COM, which is also included in printed form with every adapter purchased from our shop.
Suggestions, requests, and improvements are welcome!

Best regards, Rainer.

Jan6K wrote:

Hi, Just select the relevant measurement group and click "Start"... or are you asking something else? The feature that allows you to achieve this is called "Measure Blocks" or something similar - I don't have Windows at hand right now to try it out.

The problem was more about which blocks I needed to log.
Rainer already gave me a kind of overview as a link, thank you.

Hi,

Oh yeah, the torque curve...

PD controllers likely have a measurement module that outputs the torque value they *believe* they are generating. They calculate it based on the operational parameters.

"The ASV cannot do that; it's a VE motor."

Best regards,

Jan.