 |
Matronics Email Lists
Web Forum Interface to the Matronics Email Lists
|
| View previous topic :: View next topic |
| Author |
Message |
nuckolls.bob(at)aeroelect
Guest
|
 Posted: Wed Nov 10, 2010 6:26 am Post subject: Jabiru 3300 OV protection |
 |
|
Hi Bob,
Do you have a protection circuit to protect against regulator-rectifier failure for the PM alternator as used on the Jabiru 3300? I have installed the OV crowbar circuit but does this stop voltage excess say 15-20V? I am getting interference affecting the ECU as I have fuel injected the engine. I will test the Vreg output in a couple of days but need to be sure I have this protection if possible anyway.
Thanks
Peter
Quickie Q-200Jabiru
It would the be the same technique illustrated
in . . .
http://www.aeroelectric.com/PPS/Adobe_Architecture_Pdfs/Z16M.pdf
OV protection systems for 14v airplanes are designed
to shut the alternator down and latch it off if the
bus voltage exceeds 16.0 to 16.5 volts.
Have you had a voltmeter on the system. This is the
FIRST thing you do for iniital operations of any new
system . . . see if the alternator is even working
and deduce the voltage regulator setting.
Bob . . . [quote][b]
| | - The Matronics AeroElectric-List Email Forum - | | | Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:
http://www.matronics.com/Navigator?AeroElectric-List |
|
|
|
| Back to top |
|
 |
peterjfharris(at)netspace
Guest
|
| Posted: Wed Nov 10, 2010 1:27 pm Post subject: Jabiru 3300 OV protection |
|
|
Thanks Bob
Yes I have a voltmeter and have not noticed a problem but I will fit the S704-1 for protection. The EFI system has worked fine for 3 years but now it seems that noise is boosting the MAP signal which no longer follows the fuel maps and it runs over rich. I will also test with alternator disconnected.
I will report back when solved and hope it may help someone else.
Thanks
Peter
From: owner-aeroelectric-list-server(at)matronics.com [mailto:owner-aeroelectric-list-server(at)matronics.com] On Behalf Of Robert L. Nuckolls, III
Sent: 11 November 2010 00:26
To: aeroelectric-list(at)matronics.com
Subject: Jabiru 3300 OV protection
Hi Bob,
Do you have a protection circuit to protect against regulator-rectifier failure for the PM alternator as used on the Jabiru 3300? I have installed the OV crowbar circuit but does this stop voltage excess say 15-20V? I am getting interference affecting the ECU as I have fuel injected the engine. I will test the Vreg output in a couple of days but need to be sure I have this protection if possible anyway.
Thanks
Peter
Quickie Q-200Jabiru
It would the be the same technique illustrated
in . . .
http://www.aeroelectric.com/PPS/Adobe_Architecture_Pdfs/Z16M.pdf
OV protection systems for 14v airplanes are designed
to shut the alternator down and latch it off if the
bus voltage exceeds 16.0 to 16.5 volts.
Have you had a voltmeter on the system. This is the
FIRST thing you do for iniital operations of any new
system . . . see if the alternator is even working
and deduce the voltage regulator setting.
Bob . . . 0123456789012345678
[quote][b]
| | - The Matronics AeroElectric-List Email Forum - | | | Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:
http://www.matronics.com/Navigator?AeroElectric-List |
|
|
|
| Back to top |
|
|
nuckolls.bob(at)aeroelect
Guest
|
| Posted: Wed Nov 10, 2010 7:10 pm Post subject: Jabiru 3300 OV protection |
|
|
At 03:23 PM 11/10/2010, you wrote:
| Quote: | Thanks Bob
Yes I have a voltmeter and have not noticed a problem but I will fit the S704-1 for protection. The EFI system has worked fine for 3 years but now it seems that noise is boosting the MAP signal which no longer follows the fuel maps and it runs over rich. I will also test with alternator disconnected.
I will report back when solved and hope it may help someone else. |
Hmmmm . . . engine sensors tend to offer DC signals that are
easy to filter. I suspect that alternator 'noise' is not
root cause for the noted errors. But I could be wrong. Let
us know what you find and holler if we can help.
Bob . . . [quote][b]
| | - The Matronics AeroElectric-List Email Forum - | | | Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:
http://www.matronics.com/Navigator?AeroElectric-List |
|
|
|
| Back to top |
|
|
peterjfharris(at)netspace
Guest
|
| Posted: Wed Nov 10, 2010 8:27 pm Post subject: Jabiru 3300 OV protection |
|
|
Thanks again Bob,
It turns out I do have the PM alternator disconnect relay S704-1 I had forgotten. I suppose if the rectifier is shot it would pass up to 16VAC. The supply voltage from ECU to MAP sensor is 5VDC which I confirmed static. Not sure if the ECU signal input is filtered but it should be as you say.
I will report back when tried with alternator disconnected.
Peter
From: owner-aeroelectric-list-server(at)matronics.com [mailto:owner-aeroelectric-list-server(at)matronics.com] On Behalf Of Robert L. Nuckolls, III
Sent: 11 November 2010 13:09
To: aeroelectric-list(at)matronics.com
Subject: RE: AeroElectric-List: Jabiru 3300 OV protection
At 03:23 PM 11/10/2010, you wrote:
Thanks Bob
Yes I have a voltmeter and have not noticed a problem but I will fit the S704-1 for protection. The EFI system has worked fine for 3 years but now it seems that noise is boosting the MAP signal which no longer follows the fuel maps and it runs over rich. I will also test with alternator disconnected.
I will report back when solved and hope it may help someone else.
Hmmmm . . . engine sensors tend to offer DC signals that are
easy to filter. I suspect that alternator 'noise' is not
root cause for the noted errors. But I could be wrong. Let
us know what you find and holler if we can help.
Bob . . . 0123456789012345678
[quote][b]
| | - The Matronics AeroElectric-List Email Forum - | | | Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:
http://www.matronics.com/Navigator?AeroElectric-List |
|
|
|
| Back to top |
|
|
|
|
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum
You cannot attach files in this forum
You can download files in this forum
|
Powered by phpBB © 2001, 2005 phpBB Group
|
Get Email Distribution Too!
FAQ
Search
Memberlist
Usergroups
Register
Profile
Log in to check your private messages
Log in
