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onscrean Samba Member
Joined: July 08, 2020 Posts: 1 Location: BC
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Posted: Fri Sep 10, 2021 3:42 pm Post subject: Re: Idle Stabilizer Control Unit Alternative |
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Definitely interested in this as I was told there could be an issue with mine. Ive got a 1987 2.1GL automatic. |
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dart330 Samba Member
Joined: July 19, 2004 Posts: 454 Location: Houston, TX
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Posted: Sun Oct 24, 2021 4:22 pm Post subject: Re: Idle Stabilizer Control Unit Alternative |
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Any updates? Really hoping this comes to market. Thanks! _________________ Driving a 90 Carat since 2014
Previous Buses: 59 Westy, 60 Westy, 74 Bus, 82 Westy, 85 Westy, 87 Syncro
Checkout my Syncro Video: https://www.youtube.com/watch?v=0JSWhLS7jLY |
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montanasurfer Samba Member
Joined: March 06, 2014 Posts: 319 Location: United States
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Posted: Tue Oct 26, 2021 10:27 am Post subject: Re: Idle Stabilizer Control Unit Alternative |
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Sign me up for one too please! _________________ 1987 Vanagon GL - Wolfsburg Edition |
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zoti Samba Member
Joined: December 26, 2007 Posts: 2060 Location: Plano, TX USA
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Posted: Sat Nov 06, 2021 12:55 pm Post subject: Re: Idle Stabilizer Control Unit Alternative |
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I am restarting this project after my last partner decided to quit.
I have another engineer working with me now and we are collecting info again. What we are trying to understand is exactly how the unit behaves under different conditions.
The unit receives a signal when you crank the engine. Someone suggested that when it gets that signal it opens the valve all the way to help with starting the engine.
We are also trying to completely understand the affect of engine temp on the stabilizer unit behavior.
Testing we have done show that the unit raises the engine idle by 50rpm when there is power steering load. I assume it's the same for AC. I also know it does something similar when you set an automatic into Drive.
Basically trying to collect as much info as I can about the unit.
If anyone cares to contribute, that would be great. |
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zoti Samba Member
Joined: December 26, 2007 Posts: 2060 Location: Plano, TX USA
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Posted: Sat Nov 06, 2021 12:56 pm Post subject: Re: Idle Stabilizer Control Unit Alternative |
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I am restarting this project after my last partner decided to quit.
I have another engineer working with me now and we are collecting info again. What we are trying to understand is exactly how the unit behaves under different conditions.
The unit receives a signal when you crank the engine. Someone suggested that when it gets that signal it opens the valve all the way to help with starting the engine.
We are also trying to completely understand the affect of engine temp on the stabilizer unit behavior.
Testing we have done show that the unit raises the engine idle by 50rpm when there is power steering load. I assume it's the same for AC. I also know it does something similar when you set an automatic into Drive.
Basically trying to collect as much info as I can about the unit.
If anyone cares to contribute, that would be great. |
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zoti Samba Member
Joined: December 26, 2007 Posts: 2060 Location: Plano, TX USA
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Posted: Sun Nov 07, 2021 2:39 pm Post subject: Re: Idle Stabilizer Control Unit Alternative |
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If anyone is interested in seeing what controls the valve then here's a scope image of the readings. Basically the yellow square wave opens and closes the valve really fast to a point that the valve barely moves.
Blue reading is hall sensor.
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ejsmall Samba Member
Joined: April 21, 2010 Posts: 6 Location: South Portland, Maine
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Posted: Sat Dec 11, 2021 3:38 pm Post subject: Re: Idle Stabilizer Control Unit Alternative |
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Hello Zoti... I was just online about to order a ICU rebuild for my '86 Vanagon and stumbled on this thread and seeing the work you've been doing over the past year.... are you getting close? My van is put away for winter, so I could wait if your on track to offer product soon. Seems like maybe your project has stalled?
Thanks!
Last edited by ejsmall on Sat Dec 11, 2021 3:40 pm; edited 1 time in total |
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Vana Guy Samba Member
Joined: August 23, 2016 Posts: 212
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Posted: Sun Dec 12, 2021 3:21 pm Post subject: Re: Idle Stabilizer Control Unit Alternative |
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Just curious, how does the ECU or ICU know when to control idle speed? What I mean is how do they know when the engine is in idle condition? |
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Vana Guy Samba Member
Joined: August 23, 2016 Posts: 212
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Posted: Sun Dec 12, 2021 3:22 pm Post subject: Re: Idle Stabilizer Control Unit Alternative |
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Just curious, how does the ECU or ICU know when to control idle speed? What I mean is how do they know when the engine is in idle condition? |
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Vana Guy Samba Member
Joined: August 23, 2016 Posts: 212
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Posted: Sun Dec 12, 2021 3:22 pm Post subject: Re: Idle Stabilizer Control Unit Alternative |
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Just curious, how does the ECU or ICU know when to control idle speed? What I mean is how do they know when the engine is in idle condition? |
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1988M5 Samba Member
Joined: January 23, 2016 Posts: 674 Location: Santa Cruz, CA
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Posted: Sun Dec 12, 2021 3:42 pm Post subject: Re: Idle Stabilizer Control Unit Alternative |
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Vana Guy wrote: |
Just curious, how does the ECU or ICU know when to control idle speed? What I mean is how do they know when the engine is in idle condition? |
You have an electronic echo (3 posts in a row).
The answer is from the idle switch located on the throttle body and the RPM signal from the hall sensor, located in the distributor, sending its' info to the main computer that would then relay the ICU to work.
Look at pages 43 & 43 from this;
http://www.mk2g60.yolasite.com/resources/Digifant/...rt%201.pdf _________________ 1991 tin top GL
2002 Winnebago Vista. VW VR6 24V Eurovan front clip powered class C 21' RV.
Some BMWs. |
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1988M5 Samba Member
Joined: January 23, 2016 Posts: 674 Location: Santa Cruz, CA
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Posted: Sun Dec 12, 2021 3:42 pm Post subject: Re: Idle Stabilizer Control Unit Alternative |
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Vana Guy wrote: |
Just curious, how does the ECU or ICU know when to control idle speed? What I mean is how do they know when the engine is in idle condition? |
You have an electronic echo (3 posts in a row).
The answer is from the idle switch located on the throttle body and the RPM signal from the hall sensor, located in the distributor, sending its' info to the main computer that would then relay the ICU to work.
Look at pages 43 & 43 from this;
http://www.mk2g60.yolasite.com/resources/Digifant/...rt%201.pdf
BK _________________ 1991 tin top GL
2002 Winnebago Vista. VW VR6 24V Eurovan front clip powered class C 21' RV.
Some BMWs. |
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zoti Samba Member
Joined: December 26, 2007 Posts: 2060 Location: Plano, TX USA
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Posted: Sun Dec 12, 2021 7:11 pm Post subject: Re: Idle Stabilizer Control Unit Alternative |
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1988M5 wrote: |
Vana Guy wrote: |
Just curious, how does the ECU or ICU know when to control idle speed? What I mean is how do they know when the engine is in idle condition? |
You have an electronic echo (3 posts in a row).
The answer is from the idle switch located on the throttle body and the RPM signal from the hall sensor, located in the distributor, sending its' info to the main computer that would then relay the ICU to work.
Look at pages 43 & 43 from this;
http://www.mk2g60.yolasite.com/resources/Digifant/...rt%201.pdf |
Idle switch and RPM is correct but they both go into the IACU directly (as well as into the ECU) but the ECU does not send any signals to the IACU. They share them. |
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ejsmall Samba Member
Joined: April 21, 2010 Posts: 6 Location: South Portland, Maine
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Posted: Thu Dec 16, 2021 11:26 am Post subject: Re: Idle Stabilizer Control Unit Alternative |
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zoti, is there any ETA on your ICU module availability? |
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zoti Samba Member
Joined: December 26, 2007 Posts: 2060 Location: Plano, TX USA
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Posted: Thu Dec 16, 2021 5:16 pm Post subject: Re: Idle Stabilizer Control Unit Alternative |
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ejsmall wrote: |
zoti, is there any ETA on your ICU module availability? |
Not yet. We are working on a new prototype. |
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zoti Samba Member
Joined: December 26, 2007 Posts: 2060 Location: Plano, TX USA
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Posted: Fri Dec 17, 2021 6:18 pm Post subject: Re: Idle Stabilizer Control Unit Alternative |
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Here's another tease. This is the design of the new test board that will simulate some of the functions of the IACU.
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zoti Samba Member
Joined: December 26, 2007 Posts: 2060 Location: Plano, TX USA
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Posted: Mon Dec 20, 2021 4:45 pm Post subject: Re: Idle Stabilizer Control Unit Alternative |
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Here's our engine simulator for bench testing the unit.
Link
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Vana Guy Samba Member
Joined: August 23, 2016 Posts: 212
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Posted: Tue Dec 21, 2021 8:48 am Post subject: Re: Idle Stabilizer Control Unit Alternative |
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That should streamline things greatly.
I am so glad I watched the video. It led me to "Project Binky". I think I am going to enjoy that series a lot! |
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4Gears4Tires Samba Member
Joined: October 08, 2018 Posts: 3016 Location: MD
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Posted: Tue Dec 21, 2021 10:05 am Post subject: Re: Idle Stabilizer Control Unit Alternative |
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I've been following Project Binky from the beginning. So close now to done. It's an amazing series to follow, the fabrication is insane. _________________ '87 Syncro
Ferric Oxyhydroxide Superleggera Edition |
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Vana Guy Samba Member
Joined: August 23, 2016 Posts: 212
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Posted: Tue Dec 21, 2021 11:01 am Post subject: Re: Idle Stabilizer Control Unit Alternative |
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Can I find that on any other service besides YouTube? |
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