Ignition only

[Axel Rietschin]

636A at techedge.com.au>
Subject: Re: Ignition only
Date: Thu, 9 Nov 2000 13:16:53 +0100
MIME-Version: 1.0
Content-Type: text/plain;
	charset="iso-8859-1"
Content-Transfer-Encoding: 7bit
X-Priority: 3
X-MSMail-Priority: Normal
X-Mailer: Microsoft Outlook Express 5.50.4133.2400
X-MimeOLE: Produced By Microsoft MimeOLE V5.50.4133.2400

----- Original Message -----
From: "Peter Gargano" <peter at techedge.com.au>
>
> Axel, Just a small correction here about current. I've seen a lot of
people
> make this same claim...
>
> Axel Rietschin wrote:
>
> > <snip>
> > .... One of the
> > cylinders is at the end of the compression stroke and the other, where
the
> > second - wasted - spark occurs, is at the end of the exhaust stroke
where
> > pressure is near atmospheric, thus that other spark consumes very little
> > current.
>
> The same current flows across both spark gaps - this must be the case
unless
> we're losing or gaining electrons somewhere. The high voltage winding of
the
> coil moves the electrons across both spark gaps in much the same way a
> battery moves electrons through (say) two light bulbs in series (note
Bruce:
> that's series, not parallel, as you stated).
>
> Okay, the electronic engineers among us may invoke the high frequency
nature
> of the actual spark current, and note that the capacitance and inductance
of
> the high voltage leads and the coil itself have a major influence on what
> currents actually flow where and when. But I'm not going to argue the
point,
> just to note that when one of the HT leads comes off, then these factors
do
> become important, but this isn't the usual mode of operation for DIS.

Thanks for the precisions!

> > In other words, a wasted spark DIS doesn't save you a gap compared to a
> > distributor based system. It just moves it.
>
> Correct - my original contention  8^)

Regards,
Axel


----------------------------------------------------------------------------
To unsubscribe from diy_efi, send "unsubscribe diy_efi" (without the quotes)
in the body of a message (not the subject) to majordomo at lists.diy-efi.org