Forwarded: Re: a/f ratio with LPG

[RABBITT_Andrew at mv8.orbeng.com.au]

The heated EGO sensor is heated to enable closed loop A/F ratio 
control sooner after cold start-up since the Zirconium Dioxide element 
doesn't start working until about 300_C.  The sensor does measure 
oxygen concentration.  

Once operational, the difference between heated and conventional 
sensors is not very much at all (heated sensors are supposed give a 
more stable output).

(If it were confused with NOx and CO to any significant degree, then 
they would be absolutely useless in automotive applications where CO 
and NOx vary from nearly nothing to a whole heap)

Andrew Rabbitt
Orbital Engine Company


From: ("Paul E. Campbell") pecampbe at mtu.edu:smtp
Date: ## 05/16/96 10:13 ##
> I was wondering if it is possible to use a normal (i.e petrol) O2 sensor 
> when running a car on LPG, as opposed to unleaded fuel.

If it is a heated sensor (and most aren't), then yes. If not..you have to get
it up to temperature before it works.

Also as far as I know, those suckers don't actually measure oxygen. They
measure ion concentrations of CO2 and they are also confused by NOx and CO.