More UEGO stuff

[Raymond C Drouillard]

On Thu, 4 Feb 1999 09:31:03 +0100 "Espen Hilde" <mwichstr at online.no>
writes:
>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.

According to what I read, the testing chamber is seperated from the
exhaust flow and the exhaust diffuese into the chamber at a known rate. 
Exhaust flow doesn't affect the reading, but pressure does.  There was a
lot of discussion about coming up with a table to compensate for this.

Ray Drouillard

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