Wide-band O2 sensor - Hugo?

[Ray Drouillard]

I was one of the folks that went off list.  If I dig through my CD archives,
I can probably find the original messages.

Anyhow, I pencilled a few schematics, scanned them in, and sent them to the
group.  They were picked up and combined with other ideas.  After Garfield
came back and announced that he had completed his design, and that we could
buy one (with the promise of not reverse-engineering it), the emails dropped
off.  I figured that everyone had lost interest.

Anyhow, I just found one of my old schematics.  I actually made that one on
the computer.  I'll send it straight to you, since I don't like posting
binaries to a list (usually)

Ray




----- Original Message -----
From: "Bruce" <nacelp at bright.net>
To: <diy_efi at diy-efi.org>
Sent: Saturday, October 16, 1999 11:17 PM
Subject: Re: Wide-band O2 sensor - Hugo?


>
> 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
> >
>
> --------------------------------------------------------------------------
> --
> > 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
> >
> >
>
> --------------------------------------------------------------------------
--
> 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
>
>

----------------------------------------------------------------------------
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