real time dyno?

[Bruce Bowling]

> strain gauge.  And while there may effective ways to absorb power by 
> other means, the measurement of the absorbed power still seems devilish. 
> Any ideas on means, or does anyone have knowledge of how the commercial 
> dyno manufacturers do calibration?
> 
I always thought one could put an electrical load on the alternator, and
see the RPM drop of the engine.  I do not know how much power an
alternator sucks up, but I can tell a RPM drop whenever I turn
on the headlights at idle.

I guess one would not want to put a gigantic load on an alternator
for very long, but a known big load that is applied via. a PWM
technique, with the duty cycle adjusted until the RPM drops a
small amount, may work. With a calibrated alternator, one may get some
sort of a number out which could be a mark for engine performance.

- 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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