Positive spark ignition system help.

[Super God]

Hello,

I am currently resuming work on the water engine project I started so many months ago.  Can anyone here give me a simple way to convert the massive negative pulse generated when the ignition coil's magnetic field breaks into a positive jolt?  The reason for doing so, is because the energy from the coil is funneled down into a spark plug using diodes, and by leaving the coil hooked up as is (it's a lawnmower coil), the spike of voltage may be blocked by the diode instead of being passed as is desired.  For a simple solution I was thinking something along the lines of a full wave bridge rectifier rated at a huge value (5kv should be enough).

Can anyone offer some advice?

[Super God]

Reversing the source would work, but it would be a hazard, grounding the engine with the hot side of the 110 circuit like that.  The currents are isolated from one another by a simple diode circuit.  Would using a full wave rectifier "rectify" the negative spike from the ignition coil, or is it too fast?  The only other option I can see would be devising my own triggering mechanism and spark system.  But, since you have experience with this, maybe you could help?  The only requirements are that it has to be a positive DC jolt to the plug, enough to jump the gap, so that the diodes can still effectively isolate the two sources from each other.

[Super God]

Here is a crappy diagram of the circuit design as of now.  If we could add a full wave rectifier (to flip the HV wave) at the coil, before the diode.  The diodes only purpose is to prevent the 110 from shorting out through the coil.

[onthecuttingedge2005]

Something like this would be cool.

Jerry

[Super God]

Wow O.O look at that circuit.  Hmmm, my electronics skills arent that great.  Maybe I can try to windle up a PCB board sometime.