AFR control

[peter paul fenske]

>Munch.........
>We need accurate air/fuel ratio (AFR) control over a wide range of 
>chomp..........
>Hi Eric
>I suppose you could do what most of the OEMs do. That is use
>corrector tables based on O2 feedback. Use a lookup table
>that is close and have the ECM build a modifier table. This is based
>on the time the O2 sensor spends above and below the set point. 
>Most closed loop systems use this approach.
>For WOT closed loop around 14.7 is really not a good idea. Even with
>EFI fuel distribution is not perfect and I believe best power and torque
>are closer to 13 to 1. For this I suggest using the closest load point
>modifier from the ECM closed loop table to the current WOT setting
>and then enriching that modifier to get the richer mix. Thus closed loop
>setting could still correct open loop operation.
>I quess there are many ways to do this. Just my 2 sense.
>
>Is this a workable AFR control procedure?
>
>Prob works just as well

>Eric 
>
>
>GL: peter