DFI revisited

[Bruce]

Just gotta find that post of Orins.
Was was sure it was on, then off when fired (coil part). I thought there was
a .1sec disarm to it.
Bruce


----- Original Message -----
From: "Howard Chu" <hyc at highlandsun.com>
To: <diy_efi at diy-efi.org>
Sent: Thursday, October 25, 2001 9:41 PM
Subject: Re: DFI revisited


> > From: "Bruce" <nacelp at bright.net>
> > Subject: Re: DFI revisited
> >
> > Simple gate logic for when the sensors phase right to start the count to
X
> > chip.
> > I the ought the dewell was figured in the coils electronics.
> > I don't have my eDIST running yet,  so I can't say for sure.
> > What a minute, it just uses the ecm for firing the plugs, I'd
> > just about bet
> > the dwell control is in the coil
> > Bruce
>
> Ok, that makes sense to me, but I still don't know enough about this coil.
> The system I'm replacing had a "smart" ignitor too; the spark signal from
> the ECU goes high at some point, stays high for a while, and goes low when
> the spark must fire. The ignitor controls how long to actually dwell
though,
> and can start charging the coil some arbitrary time after the ECU signal
> went high.
>
> I was just assuming this smart coil would behave the same way - ECU goes
> high, coil can start charging, signal goes low, coil must fire. But if the
> coil only needs a "fire" signal, and takes care of dwell completely on its
> own, then I can just do this all without any microcontroller, as I had
> originally planned. Do you know where I can find more documentation on
> operating this coil? Does it just need a momentary +5V pulse to fire?
>
>   -- Howard Chu
>   Chief Architect, Symas Corp.       Director, Highland Sun
>   http://www.symas.com               http://highlandsun.com/hyc
>
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