What does stoich mean?

[David A. Cooley]

At 07:46 PM 8/18/99 -0400, you wrote:
>By definition, the stoichiometric ratio is when
>you balance the chemical equation so that there
>is no free oxygen left.  Wouldn't the O2 sensor
>show 1 volt (max diff of outside to inside O2)
>at stoich?  Is there incomplete combustion even
>though the input mixture is at stoich?  The combustion

Theoretically, there is no free O2 left at stoich, and the combustion 
byproducts are H2O and CO2...  In the real world there is CO and HC 
remaining and a few other nasty substances...  At stoich you actually see 
approximately .450 volts and the voltage swings high and low d\from 
.450...  Extremely rich (Possibly by the migration osmotically of O2 
through the Zirconia sensor element to the HC rich environment) shows .9v 
to 1 volt... Extremely lean shows .1 volts or so.
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            David Cooley N5XMT           Internet: N5XMT at bellsouth.net
      Packet: N5XMT at KQ4LO.#INT.NC.USA.NA   T.A.P.R. Member #7068
    Sponges grow in the ocean... Wonder how deep it would be if they didn't?!
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