req: lambda probe model

[Mark Wilcutts]

It's an electrochemical cell that depends on the concentration of oxygen
on either side of the ceramic electrolyte. Redox reactions on the platinum
surfaces of the probe influence the voltage to a great degree as well.
Look back in the archives for May, there was some good discussion of this.

On Tue, 6 Jul 1999, "Alfieri, Maurizio" <MAlfie at landi.it> wrote:

> Is there someone who knows an equivalent electric circuit for a lambda
> probe? (i mean the switch characteristic probes, the ones installed on
> serie veichles to feedback injection, not the linear ones)
> Or some parametric model?
>  
> How can they read rich exhaust if they are sensitive to O2? 
> Where does this residual O2 come from?