EFI

[Woodd, Michael]

> From: Land Shark <lndshrk at xmission.com>

>>1.   How exactly would the controller calculate "load" from "air" and 
"rpm"
>>and "a constant"? i.e. what would the equation be?  (please treat me as
>>completely ignorant, though I am not quite)
>>
>
> Ahh .. glad you asked... :)

Me too ;-)

>
> Consider LOAD to be equal to .. AIR INDUCTED per CYCLE of the motor ..
> The LOAD as Tl (Tee sub ell) is ...
> Tl=Q/(n*Ki) where Q is that airmass or airmass approx from airFLOW in 
Kg/Hr..
>                  n is engine speed in RPM
>                   Ki is the injector constant that equates Tl to the base 
injector
>                   pulse width needed for that flowrate of injector and 
that amount
>                   of air/cylinder..

Soooo, it comes down to airmass, as it always must -  What I am really 
wondering then is how you work out the "airFLOW" in Manifold Air Pressure 
EFI systems, to then work out the "airMASS"...

Mike Woodd
(wooddm at akcity.govt.nz)