Lambda Sensors....

[Mazda Ebrahimi]

tom cloud wrote:
> 
> >...
> >>Lastly, but not about O2 sensors... what data would you be interested in
> >>seeing from this engine? (Honda CBR600)  I have several inputs that I'm
> >>not using, and if I can put them in the budget, I would be happy to add
> >>any interesting sensors (I would like to add accelrometers, but haven't
> >>found a source for them).
> >...
> 
> Why aren't you using EGT ?  Is that only good for fixed load (e.g.
> airplane) operation?
> 
> Tom Cloud <cloud at peaches.ph.utexas.edu>In talking to a couple of engine builders and dyno facilities in the 
past, they generally use EGT for two reasons:
1- to make sure they don't exceed the maximum temp. spec for a given 
engine and;

2- They use it as a difinitive test to show A/F ratio variance from 
cylinder to cylinder (i.e. cylinder to cylinder distribution), which is 
of course very significant to achieving good power.

In every application I have seen, EGT temp is only used under steady 
state conditions, maybe because of the time constant of thermocouples? 
(just a guess)