[Diy_efi] Ion Sensing project

[bill.shurvinton at nokia.com]

Hmmm. I may have lost the plot here, but I thought that the usual way to =
maintain the spark was to recharge the capacitor half-way though to give =
a sawtooth, so the voltage will be much higher due to coil. But quick =
websearch also shows (www.adrenalineresearch.com/smart.htm) shows a =
secondary capacitor designed to promote a high current plasma, but this =
is very short and does not extend the decay time. Some experimentation =
may be required.

I need to tap my colleage who used to work on rail guns and so is good =
with high voltages

Bill

-----Original Message-----
From: ext Ville Vartiovaara [mailto:vvartiov at cc.hut.fi]
Sent: 04 July 2002 11:01
To: diy_efi at diy-efi.org
Subject: Re: [Diy_efi] Ion Sensing project

> I have a CDI system on my car, and will look it up tonight after work. =
Is
> this a feature that all CDI systems have? I don't remember anything =
with
> my system manual that says anything about arc-maintaining.

No, just some of them have. Capacitor discharge time is enough for most
systems, but the ones that need as long spark durations as coils offer
(lean mixture or otherwise difficult conditions) have one fitted.=20

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