Injector Sizing: REALLY dumb question

Greg Hermann bearbvd at sni.net
Wed Aug 26 23:47:43 GMT 1998


>OK, another really dumb injector question.  Granted that when the
>injector on time gets short, total fuel delivered in the pulse will
>become more variable as the natural variability of open/close time
>has more and more effect.
>	My question is, independent of these considerations, what is the
>effect of duty cycle?  If during light cruising, the injector is only
>delivering fuel during, let's say, 20% of the intake valve's opening
>time, you have this packet of incredibly rich A/F mixture rushing
>into the cylinder followed by a big gulp of air that has basically no
>fuel in it at all.  Is mixing inside the cylinder turbulent enough to
>ensure an even distribution by the time of ignition or is the charge
>still stratified?
>
>Z

It better be or the really won't run right (unless somebody designed it to
run stratified, and the part that will burn is next to the plug. Not a dumb
question at all. It shows that you'catching on to what's going on!

Regards, Greg





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