Pulsewidths & injectors & coils ;-)
Scot Sealander
Sealand at clarityconnect.com
Thu Sep 14 00:26:52 GMT 2000
Nicholas Parker wrote:
> What are ballpark figures for the resolution (in time) you need for
> effective injector control?
Depends on a few things. You may want to look at hot idle PWs. My
car often idles around one mSec PW. If I want +/- 1% control, I need
10 microsec resolution. 64 uSec would give 6.4% steps, as in .00100 to
0.001064. I think that is too coarse. 100 uSec would be even worse.
My car uses 16 uSec resolution, BTW.
> What have people discovered empirically? Is 8us stupidly small?
Not at all. I think it is a good value.
> Is 64us too course?
Yes.
Scot Sealander
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