Modifying O2 output

[Jonathan R. Lusky]

CICIORA STEVEN JOSEP writes:
> 
>   Anyway... if the above two situations are the case for you, than a 
> voltage divider wont work.  I know you said not to ask, but what are you 
> trying to do?  I've thought about what you mention, and I'm not sure you 
> can fool the computer into thinking that it is a little bit leaner than 
> it really is.  From what little bit of looking I've done at the output of 
> O2 sensors, it is usually much above .6 (.7?) volts (like 1 volt) or much 
> below (like .2 volts).  Almost like a switch.

I don't know exactly how our electronics guy built the circuit,
but I did use a circuit that shifted EGO output by almost 1V
(adjustable).  This let me run closed loop around about 600mv,
which was about 0.90-0.94 lambda with the EGO's I was using.  It worked
great for what I was doing,  but i did go through about 6 oxygen sensors
before I found a pair that behaved like I wanted, and had a hard time
convincing my presentation judge at NGV Challenge '93 that it really
worked.

-- 
Jonathan R. Lusky                        lusky at knuth.mtsu.edu
http://www.edge.net/~lusky/                 (615) 726-8700
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