EFI algorithms

peter paul fenske pfenske at direct.ca
Thu Jun 13 17:35:31 GMT 1996


>to define the transfer function and then use interpolation to derive the
>intermediate values. This is how GM does it. There are 2 interpolation
>routines in the 730 code you have, one for a single dimension table
>(simple list), and one for a 2D table (load vs rpm = VE_value for example).
>
>Later,
>
>Jim Sturcbecher
>jsturs at bart.nl
>
>Hi Jim
>To be honest have been bending to interpolation. Using a 16 element
>lookup with linear interpolation would give a pretty good aprox
>to linear. A 16 element search would give a tad more resolution
>but at a small price in overhead. The cycle count on the software
>I have now indicates there is room but not much. 
>However I did develop a math algorithm for the process. Unfortunately
>it needs several adda,suba, a mul, and a div which would kill you
>in HC11 time. Have to do a lot of these. and there always is these
>pesky interrupts happening at 6400 rpm.
>Tnx
>:peter
>




More information about the Diy_efi mailing list