Lambda Sensors....

[Doug Robson]

tom cloud wrote:
> 
> >
> >With all the talk on Oxy sensors, I thought I might ask a few more
> >questions (aack! do I *ever* have any answers?):
> >
> >  The Lambda sensor is good for only a small range... Can it reliably
> >   sense the "Power Band" of a mixture, or is that too rich for it?
> >
> >  Several people have mentioned temperature instability.  Because this is
> >   a "research vehicle" (at least in my mind, 'cuz I know little about
> >   gas engines), I was planning on mounting the lambda sensors approx 1-2"
> >   from the exhaust ports (1/cyl to make the microconfuser code easier).
> >   Can I get relaible readings here, or will the exhaust temp cycling
> >   confuse my sensor?
> 
> The papers I read show that the EGO output is useable at stoich once
> it's above some temp (600 C seems to stick in my mind ??).  It's
> off stoich where the variations make the sensor 'inaccurate' but
> not necessarily unusable (I love talking in generalities -- I can sound
> so knowledgeable without knowing anything -- called 'blowin' smoke').
> Serially, though, EGO is used by auto mfgrs for stoich.  Most now
> heat it to get it to temp faster.  I wonder if any oem uses it for
> any data other than stoich?  (i.e. does anyone do closed loop at any
> A:F other than stoich??)  From my experience looking at a digital
> readout, you can get an indication of what's going on, but I don't
> think I'd want to use that data to close the loop on a confuser.
> 
> Tom Cloud <cloud at peaches.ph.utexas.edu>

The LAtes MOtec units have a 3D table of load vs lambda, you type in the
lambda you want at that  point
and then just rooa about on the track or the dyno till it says its fill
all points for fuel and thats it lmbda = .89 everywhere
wish my autronic would do it

regards
-- 
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