My s1r9a9m9 replication!

[Super God]

Also gapping the plug will make it harder for water to short it out.

[capacitor70]

Also gapping the plug will make it harder for water to short it out.

More gap more HV blocking diodes....

DESIGN IS PAYING ATTENTION TO DETAILS

[retrod]

Bulbs are for just experiment purpose, Previously I am using 700Hz 230V 100Watt Inverter, wattage is problem.

Inverter is in my mind, I am having 200Amps 1200V IGBT pairs for inverter, but right now more focus on starting engine in ideal to get all needed conditions.

major problem is right now is spark plug gets shorted with water and engine oil on its tip, many times it requires opening and cleaning again and again. On my table setup I checked different size spark plugs, 0.5", 0.75" and
1" diameter, I got best results with bigger spark plug. It gives both advantages prevent shorting and more area for
water burning. flame size is without water 0.5" and with water 1.5 to 2 inch in diameter. you can see these photos on previous posts it is with only 175V DC

@Capacitor70, if your HV is shorting out with water try increasing the voltage on the coil, your schematic shows 12v on the primary. Some CDI systems operate the coil at 300v. Once the HV bridges the water you should be good to go and the LV should do it's thing..

Regards

RD

[whopper1967]

If you are getting oil fouling your plug,it sounds like bad oil rings.Do you have the hottest possible plug you can get for that application?

[Shanti]

For those who wondered, how using a Trigatron would make the diodes not needed anymore...

Well a Trigatron is actually just a switched spark gap.

Well if you would like to see the principle of a Trigatron, look here:

http://www.angelfire.com/80s/sixmhz/trigatron.html

As I mentioned before, Britts AEROPS Engine uses the same principle, but with inert gases instead of water. He also uses a Trigatron for firing.

Just go here www.pat2pdf.org and download Patent Nr 3977191
And see for yourself how he did it. He used also the standard ignition coil circuit for triggering, and a capacitor charged to 500VDC for the working current...

The disadvantage is certainly the much more complex spark plug needed, now with 3 electrodes.

But actually I think, due to the fact, that an ignition coil doesn't have much energy per firing (about 50-100mJ), it would be the simplest just to use a good varistor in front of the LV Cap (maybe with an additional inductance in the lv discharge path), which protects the cap from the HV-Surge.
Then you also do not need any diodes in your circuit!
It would certainly need some fiddling until everything works as expected and not too much coil energy gets wasted in the Varistor instead of the spark plug.

BTW: I just bought an old 2kw generator and ordered 4 100uF 600V WIMA GTO caps...Let's see how big the bang goes...
(LOL, one of these caps is 90x97mm and capable of a 3500Amp discharge (that are 14'000Amps total ), Sadly they have 3 weeks delivery time...)