O2 sensor pullup resistor values?

[Peter Florance]

I guess I wanted to simulate sampling front and rear cylinder as if I had a
single sensor on all 6 cylinders instead of one sensor on 3 cylinders.
Crazy?

Peter

> -----Original Message-----
> From: owner-diy_efi at diy-efi.org [mailto:owner-diy_efi at diy-efi.org]On
> Behalf Of bcroe at juno.com
> Sent: Thursday, December 06, 2001 12:40 AM
> To: diy_efi at diy-efi.org
> Subject: O2 sensor pullup resistor values?
>
>
> A couple of op amp voltage followers could drive a
> pair of resistors to a summing point.  But I wonder
> what you want to do with the result?  A narrow band
> sensor is not operating in the linear region, and
> summing 2 nonlinear signals is not that meaningful.
>
> The result would mean a lot more from a Wide Band
> sensor.  An ECU would not be set up to process a
> summed signal.  Putting a pair of WB bar graph
> displays side by side could be useful, I plan to do
> this soon.
>
> Bruce Roe
>
> On Wed, 5 Dec 2001 19:55:12 -0500 "Peter Florance" <audserv at exis.net>
> writes:
> > Anyone have any idea of typical ECU pullup resistor (to ~ .45V)
> > values for
> > O2 sensors inputs? I'm trying to make a analog
> > circuit to average 2 sensors for my L-jet box and
> > would like to incorporate it in the front end of the
> > buffers.
> > Also interested in any comments regarding
> > averaging O2 sensors for dual exhaust systems
> > and idle performance (in line 6 engine)
> > Thanks in advance
> >
> > Peter Florance
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