Output to drive DCCD ?
Posted: Tue Sep 21, 2010 2:57 pm
Are the Aux outputs man enough for this, or is an Injector output required ?
thanks ---john---
thanks ---john---
Cheers,
Jasper.
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Re: Output to drive DCCD ?
Posted: Tue Sep 21, 2010 5:23 pm
I would say if an aux. output is a PWM controlled output then it could work. If it's not you probably need an injector output which is a PWM based output. Stand ready to be corrected though as I'm still a Syvecs NOOB unfortunately
Cheers,
Jasper.
Cheers,
Jasper.
Re: Output to drive DCCD ?
Posted: Tue Sep 21, 2010 5:59 pm
It was the current capability I was concerned about.
---john---
---john---
Re: Output to drive DCCD ?
Posted: Tue Sep 21, 2010 10:56 pm
I tried injector output @100 hz with no success. I need a oscilloscope to check. Sure missing something.
Re: Output to drive DCCD ?
Posted: Thu Sep 23, 2010 9:07 pm
An injector output should work fine. You will want a +12V feed to one side of the DCCD coil, and the injector output to the other side of the coil. Install a Schottky flyback diode with its cathode to the +12V feed and the anode to the injector output; this will clamp the flyback voltage at about 0.4V above VBAT on flyback and stop the ECU internal flyback clamp from getting hot (it clamps at 60V and will allow the coil current to decay rapidly dumping the stored energy into the flyback clamp).
Hope this helps,
Pat.
Hope this helps,
Pat.
Re: Output to drive DCCD ?
Posted: Mon Sep 27, 2010 11:41 pm
It works good for me now.
By the way what should be the maximum ECU temperature? I have seen max 61c.
By the way what should be the maximum ECU temperature? I have seen max 61c.
Re: Output to drive DCCD ?
Posted: Fri Oct 01, 2010 4:43 pm
Correction:
Maximum ECU temperature is around 25-32 C for every session.
61C was overall.
Maximum ECU temperature is around 25-32 C for every session.
61C was overall.
Re: Output to drive DCCD ?
Posted: Mon Mar 21, 2011 6:56 pm
After the last notice from Pat I have stopped feeding my DCCD from S6PnP. I don't know if anyone experienced any problems but to me its been 6 months without problem. Max ecu temp i have seen so far is 44 but as a precaution i will take the schottky flyback diode off and add a single channel ignitor.
Re: Output to drive DCCD ?
Posted: Tue Mar 22, 2011 12:33 pm
secure,
I think you have confused my post. It referred to *ignition* outputs which are not supposed to drive coils directly, whereas the injector and auxiliary outputs are (an injector has a coil, doesn't it ?
). If you have been driving the DCCD successfully for months with a flyback diode and seeing only in to 40s temperature then I'de say that's working just fine, no need to swap over to an ignitor. Additionally, an ignitor cannot be driven from an INJ or AUX output, only from an IGN, so you'de need to re-assign the pin driving the Centre Diff too. It would work with an ignitor on an IGN output but it sounds to me like it's not necessary....
Cheers,
Pat.
I think you have confused my post. It referred to *ignition* outputs which are not supposed to drive coils directly, whereas the injector and auxiliary outputs are (an injector has a coil, doesn't it ?
). If you have been driving the DCCD successfully for months with a flyback diode and seeing only in to 40s temperature then I'de say that's working just fine, no need to swap over to an ignitor. Additionally, an ignitor cannot be driven from an INJ or AUX output, only from an IGN, so you'de need to re-assign the pin driving the Centre Diff too. It would work with an ignitor on an IGN output but it sounds to me like it's not necessary....Cheers,
Pat.
Re: Output to drive DCCD ?
Posted: Wed Mar 23, 2011 11:55 am
Yes, sometimes I do that...
I need a heatsink too.
I need a heatsink too.