control algorithm for MAF setup

Tom Cloud cloud at peaches.ph.utexas.edu
Tue Mar 25 13:40:54 GMT 1997


        [ snip ]
>I'm not using a catalytic convertor I don't want stoich - most
>references show something like 16.5:1 (lean) as optimal for economy, HC,
>and NOx for non-cat operation at cruise.  The third element of the array
>would be WOT A/F ratio.  I have plenty of RAM to play with, and it'd
>allow a little more flexibility than a hardwired richen factor.
>
> That means I won't be using the O2 sensor other than as a check for
>some sort of fuel system failure at WOT, since I'll always be lean at
>cruise and rich at WOT.  I might be better off watching EGT.

question .... what _IS_ a good cruise A:F ??  I recently lost
a top ring gland -- probably due to detonation.  Where does
detonation normally occur?  I understand it can be prevented by
enrichening the mixture.

Where is the safe limit on lean running?

Tom Cloud <cloud at peaches.ph.utexas.edu>




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