Wide-band O2 sensor - Hugo?

[Bruce]

I'm not sure in what you mean in descendent of your's.  I don't remember
seeing anything diagram wise other then what Chad started working on.
There were claims of some working models, but none got shared, other then
Chad's, at least that I was privy to.
   As the flaming started, some of us went off list to continue.   By losing
contact, sounds like when we went off list.
Bruce


----- Original Message -----
From: "Ray Drouillard" <RayLists at quixnet.net>
To: <diy_efi at diy-efi.org>
Sent: Tuesday, October 16, 2001 10:32 PM
Subject: Wide-band O2 sensor - Hugo?


> Is the wide-band information on the site a descendent of the project that
I
> was involved with a few years ago?
>
> I recall that someone had started project "Hugo", then left the list after
a
> protracted and ugly flame war.  A group of people (including Bruce Plecan)
> and I started working on it.  I did some research on the theory of
operation
> of the device (very simple, actually), and came up with a preliminary
> schematic.  That design was later refined.  Somehow, I lost communication
> with the team.
>
> I just looked at the new design.  I see some similarities, like the
"virtual
> ground" created by an op-amp in voltage follower configuration.  The
output
> circuitry is very similar - except that it looks like someone figured out
> how to use the calibration resistor that comes with the sensor.  I was
> wondering how that thing could be used :)  Also, it looks like the
circuitry
> that feeds the ion pump has been beefed up.  It's been so long that I
forgot
> how much current that ion pump requires.
>
> Well... I have a little more reading to do.
>
> Great job, guys!
>
> It looks like you even knocked the output voltage down to a range where it
> can be a direct replacement for the HEGO sensor on my Holley Pro-Jection
> system.  Holley designed their box so that the user can change the O2
> voltage required based on the speed and load of the engine.  It'll be
> interesting to see if I can hook the sensor up and just do some tweaking
of
> that map.
>
>
> Ray Drouillard
>
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