jim-frank,
The capacitor supplied enough energy to sustain arc over the combustion cycle. By viewing the current signature with a current transformer, I verified this. I also later found information that Saab ignition, does something similar. The sparkplug is used as a sensor.
I do not mean to insult you, however reading your posts suggest there is more for you to learn about sparks. I fail to completely understand your means and theories. I do not consider myself an expert, I am always learning and experimenting. I do have a BSEE degree, to do so I passed courses in electromagnetic field theory (courses that kept about 50% of students from becoming EE's). I also have 40+ years of design and R&D experience.
Go ahead and experiment! Perhaps you are on to something. Perhaps you are the one to make a great invention.
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