Flywheel/Encoder patterns

[Walters Chris]

>The way I was looking at the problem was that I have a maximum window of
>720 degrees to fire the injector.  By using the 180 teeth with rising and
>falling edges, I can control my duty cycle in 0.13 % increments (1/720),
>and I thought this would be satisfactory.  But I can see your point about
>low load AND low RPM conditions posing a problem.  I think I'll be OK on
>my current project, but I'll keep that in mind for the next application.

It does seem to be a sticky wicket -- you need big injectors to work at WOT 
because there's very little time to deliver the fuel but big injectors 
deliver too much fuel at idle due to minimum pulse width. Could you keep the 
pulse width up at idle but compensate by dropping the fuel pressure?

Snake
no cool Fords yet, one cool Dodge