Equations, Equations and more equations.

[Bruce Bowling]

> 
> 
> I've been reading this list for awhile now and was wondering what
> equation you are trying to solve when using a computer to run your
> engine.
> 
> Essentially you are trying to determine when to fire and how much fuel
> to deliver.
> 
> What I've gotten sofar is that
>     - O2 readings regulate mixture.
>     - Knock and RPM control timing.
>     - MAF or MAP readings control fuel delivery.
> 
> 
> 
Start with Al Grippo's equations:

  http://efi332.eng.ohio-state.edu/grippo/equations.html

These are very detailed, and they contain very important equations,
such as how to compute air density, injector timing, etc.

To see some of them in action, see:

  http://efi332.eng.ohio-state.edu/bowling/fi.html

This is a java program which computes pulse width (s-d) based on
inputs that a normal vehicle obtains.

- Bruce


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                 Bruce A. Bowling
                 Staff Scientist
   Thomas Jefferson National Accelerator Facility
    12000 Jefferson Ave - Newport News, VA 23602
                 (804) 249-7240
bowling at cebaf.gov  http://devserve.cebaf.gov/~bowling
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