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ELFH Impact Detection

 
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ulf
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Post21-07-2015, 19:31    Subject: ELFH Impact Detection Quote

Hello,

How do the newer, more advanced electronic control units (ECUs) in electric fireplace heating (EFH) systems actually detect and store the upper and lower limits of the mechanical components during the initial setup or calibration process for the high and low speed automatic functions?
Are there any hidden position sensors involved, or does it simply work by storing a current threshold when the frequency inverters for the main drive motors are shut down?

Reason (so that the bear has something to complain about again):
Since my Polo 6R can no longer be easily converted to manual window cranks (due to the mounting position of the power window motors next to the dashboard instead of in the front seat knee area), I want to at least make the electrical system more similar to a manual crank system: Disconnecting it from the comfort system, providing constant power to the switch, and implementing an end-stop mechanism to prevent material breakage.
Gruß Ulf
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Translated on 19-07-2026, 13:18.
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olli
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Post21-07-2015, 19:48    Subject: ELFH Impact Detection Quote

Hi there,
As far as I know, there's an overcurrent shut-off. When that didn't exist yet, the newly introduced comfort features were deliberately deactivated because the pinch protection wasn't guaranteed. I seem to remember a video somewhere that showed an electric food processor being used as a cucumber slicer.

Best regards from Berlin,
Okay, please provide the German text you would like me to translate into English. I will only provide the translation.
A6 CANA/JME /
'95 Cinquecento als Stadtgurke ~~ 124CS0 für den Sommer...
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Translated on 19-07-2026, 13:20.
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Bertil
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Post21-07-2015, 22:01    Subject: Subject: elFH Impact Detection Quote

ulf wrote:
...
Are there any hidden position sensors?


It's been a long time...

Quote:

...or does it only work by saving a current threshold when the fuel injection motors are shut off?


Yes.

At the same time, this implements the now mandatory pinch protection feature.
I hope you are also aware that, regarding the gray-colored components, you need to provide proof that your design is sufficiently effective. These safety circuits are now subject to examination.


"For example, this year I suddenly couldn't get the required vehicle inspection (TÜV) for my Jetta because the window mechanism can only be operated with the door open. When the door is closed, the roll cage obstructs it. The reason given was that the emergency exit was blocked."
Gruß Bertil

Skoda 5E5 CZDA + Mini R50 W10 + VW ID.3 + Fiat Ducato 250 + 161 DX

*** Technische Anfragen per PN werden von mir nicht beantwortet! ***


Translated on 19-07-2026, 13:21.
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ulf
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Post22-07-2015, 8:01    Subject: Subject: elFH Impact Detection Quote

Bertil wrote:
At the same time, this implements the now mandatory pinch protection system.
I hope you are also aware that you (with the gray enclosures) need to provide proof that your design is sufficiently effective. These safety circuits are now subject to testing...
Ah, thank you for the reminder.
What does the current mandatory program entail? Is there a specific clamping force that cannot be exceeded, or must the window automatically open again after the clamping is detected?
The latter, however, would be difficult to achieve without a positioning system icon_rolleyes.gif.



Quote:
For example, this year I suddenly didn't get the TÜV (German technical inspection) for my Jetta because the window lifter can only be operated with the door open. When the door is closed, the roll cage is in the way. Reason: -> Emergency exit blocked.
What? Your Jetta fossil has electric windows? icon_eek.gif
And what are you doing now? Are you replacing that piece of cage in front of the FH switch with a pipe bend?
Gruß Ulf
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Translated on 19-07-2026, 13:24.
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Post22-07-2015, 8:26    Subject: Subject: elFH Impact Detection Quote

ulf wrote:
What? Does your Jetta fossil have elFH? icon_eek.gif
And what are you doing now? Are you replacing that piece of cage in front of the FH switch with a pipe bend?
I would say that when he says "operate," he means turning the crank, because there's nothing mentioned about an electric motor or a switch. icon_wink.gif

What's the point of all this renovation? Is it because you believe you can detect faults earlier and switch things off before the automatic system would?
Then let me tell you that you are very mistaken.
Before your ears registered that something sounded wrong and the brief moment for the command to remove your finger from the switch had passed, the automatic system had already stopped. icon_wink.gif
MfG. Michael

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Translated on 19-07-2026, 13:26.
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ulf
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Post22-07-2015, 9:10    Subject: Subject: elFH Impact Detection Quote

TDI-GTI-4-Motion wrote:
I would say that when he mentions "operating" it, he means turning the crank, since there's nothing mentioned about electrical components or switches. icon_wink.gif
Ah yes, that's probably what it is. icon_redface.gif



Quote:
What's the point of all this renovation? Is it because you believe you can detect faults earlier and take them out of service before the automatic system would?
Then let me tell you that you are very mistaken.
Before your ears registered that something sounded wrong and the delay for the command to remove your finger from the switch had elapsed, the automatic system had already stopped. icon_wink.gif
I understand. That's why I plan to include an analog power shut-off with an adjustable switching threshold.

I'm interested in... / I'm concerned about... / It's about...
1. The ability to open and close windows without having to turn on the ignition every time.
"Disabling the complex comfort electronics that occasionally automatically open the windows – I don't want to come back to my parked car and find it has been broken into because some bit got stuck."
Gruß Ulf
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Translated on 19-07-2026, 13:29.
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matthiasTDI96
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Post22-07-2015, 9:15    Subject: ELFH Impact Detection Quote

"Tell me, how do your predictions work? Do they just happen overnight, or is there a solid foundation of data behind them?"

I have to admit, none of my cars have ever had such malfunctions before. While I'm not familiar with the Polo, even in older models like the Golf, you could open and close the windows without turning on the ignition...you didn't even need to be inside the car to do it.


Translated on 19-07-2026, 13:30.
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ulf
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Post22-07-2015, 9:38    Subject: ELFH Impact Detection Quote

Quote:
but even with the old Golf, windows could be opened and closed without ignition....you didn't even have to be in the car for that:-)
And as a possible side effect, you might get something like this (specific to my car model):
http://www.polo6rfreunde.de/index.php/Thread/6184-Fensterheber-haben-Eigenleben-%C3%96ffnen-sich-selbstst%C3%A4ndig-bei-verschlossenem-Fahrz/
That's exactly what I want to eliminate before it starts manifesting in me as well icon_evil.gif.

It's not enough for me to simply disable the comfort function. I simply want to be able to operate the windows "the old-fashioned way, with direct access" (when the door is open), without having to insert a key into the ignition or door lock as a preliminary step, or having to press buttons on the remote control for what feels like half a minute.
Gruß Ulf
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Translated on 19-07-2026, 13:32.
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Post22-07-2015, 9:46    Subject: Subject: elFH Impact Detection Quote

ulf wrote:
1. The ability to open and close the windows without having to turn on the ignition every time.
2. Disabling the complex comfort electronics that occasionally automatically open the windows - I don't want to come back to my parked car, which has been broken into, just because some bit got stuck.
The points complement each other perfectly.

A mouse could just sneak into the car unnoticed and then, at night, it would run on the switch icon_arrow.gif. The window would open because it's connected to a constant power supply. icon_angel.gif
MfG. Michael

VW Golf IV TDI GTI 4-Motion Bj.2002 MKB/GKB: ARL/FEK
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Translated on 19-07-2026, 13:33.
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ulf
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Post22-07-2015, 9:54    Subject: ELFH Impact Detection Quote

Good point about the mouse... icon_lol.gif Then there's also a permanent "plus kills" switch in a location where no mouse can reach.
Gruß Ulf
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Translated on 19-07-2026, 13:34.
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Post22-07-2015, 10:04    Subject: ELFH Impact Detection Quote

What's actually the argument against converting to manual folding mirrors?
MfG. Michael

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ulf
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Post22-07-2015, 10:08    Subject: ELFH Impact Detection Quote

See the original post:

Since the window motor assembly position in my Polo 6R is next to the dashboard (instead of in the front seat knee area), it's no longer a simple "plug and play" conversion to manual window cranks...



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Gruß Ulf
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Translated on 19-07-2026, 13:35.
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Post22-07-2015, 10:12    Subject: ELFH Impact Detection Quote

I can hardly imagine that the VW Group platform doesn't offer anything that can be customized or adapted.
"Could you please find some pictures of a stripped-down Polo with manual windows, and also pictures of other vehicles from the same era (e.g., Seat Ibiza, Skoda Fabia) that came with manual windows?"

EDIT: It might also be worth investigating whether there are versions of the 6R with manual window lifters specifically for developing countries. Brazil, for example, could be quite interesting, as they often have features that aren't available elsewhere.
MfG. Michael

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Translated on 19-07-2026, 13:36.
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ulf
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Post22-07-2015, 10:21    Subject: ELFH Impact Detection Quote

Take a look at where (approximately) the shift linkage axis is located in the red door of the Polo 6R, and compare it to the door of the Ibiza 6L below. I had converted the Ibiza to use linkages, but with the 6R, I don't want to have to cut away the outer ~20cm of the dashboard each time to allow the linkages to engage icon_confused.gif.



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Translated on 19-07-2026, 13:37.
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Post22-07-2015, 10:27    Subject: ELFH Impact Detection Quote

Das sehe ich schon, aber das spielt doch keine Rolle wo es bei der el. The version is installed.
The manual FH icon_wink.gif can be designed/made in a way that it's located somewhere else. Of course, this won't be 100% plug-and-play, and holes will have to be drilled, for example. But your electronics tinkering isn't exactly plug-and-play either, is it? }
MfG. Michael

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ulf
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Post22-07-2015, 10:56    Subject: ELFH Impact Detection Quote

Unfortunately, the VW parts catalog does not list any crankshaft handle mechanisms for the front doors, even for versions sold in foreign markets.
Door panels for manual window operation are only available for the rear doors, both domestically and internationally.

And before I, for example, move a chain drive from the FH axis next to the control panel to a DIY crank at knee height, and in doing so have to modify the door panels, I would rather solve the problem with an electrical conversion icon_evil.gif.
Gruß Ulf
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Translated on 19-07-2026, 13:39.
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