What is the necessary resolution of Injector times? (fwd)

[Orin Eman]

Please note the original Reply-To:

Forwarded message:

> Reply-To: <thormj at iname.com>

> I know more is better, but the linear interpolation routines are
> killing me, so its time for a realistic approach.

> Solution #1:
> What is the max % I can be off ideal before the engine notices?
> Do I need to get withing 5%, or is 10% ok?  I would eliminate the
> linear interpolation & just use the closest index.

> Solution #2:
> Can anyone provide me with a *quick* 2 point linear interpolation
> (1d map)... and a quick 4 point interpolation (2d map)?

> My current code looks like:
> return (x-curve[i-1].x)*(curve[i].y - curve[i-1].y)/
> 	   (curve[i].x - curve[i-1].x) + curve[i-1].y;

> This is for a 68hc11 uC, so the less math the better. :-/

> -Thor Johnson
> thormj at iname.com