Ignition Book

[Bruce Bowling]

~ the multiple spark is also mostly marketing jazz -- someone on the net
~ reverse-engineered the msd box and discovered that the sparks count
~ down as rpm increases, until it's down to just one spark above ~3500rpm.
~ 
But the average RPM range of the average highway vehicle falls well
below 3500 RPM, so there is benefit.  

Now, does MSD charge and dump a single capacitor, or is a bank
of capacitors charged up and a round-robin circuit sequentially
dumps the caps through the coil?  I think that MSD does the former.

A challenge:
With all of the bright engineers on this group, can someone
come up with a circuit which does the multiple spark concept
maybe better than MSD had implemented?

- Bruce

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               Bruce A. Bowling
  Staff Scientist - Instrumentation and Controls
 The Continuous Electron Beam 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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