More UEGO stuff

[Espen Hilde]

Hi all!
I have put on the coneshaped hat and are trowing in a thought:
Since the wide range uego sensor is pumping oxygen from atmosfere to the 
tip of sensor and to what I understand we want to know how much current or
oxygen it takes to make the tip stokiometric.Is the oxygen that is pumped 
used for making CO to CO2 and to burn away hydrocarbons at the tip?
If this is so, how can the sensor tell how much exhaust that is passing the

sensor to give a percentage? I would think that more exhaust flow means 
more CO and HC exposed to the tip.Is it done mecanicaly in the design of
the housing?Have I missed something?
Espen Hilde.