O2 sensor pullup resistor values?

[bcroe at juno.com]

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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