Where does the 500 volts come from to charge the capacitor?
 Normally a very expensive switching power supply is required.
 How do you squeeze a large 1 mfd, 500 volt cap into such a small coil
 package?

 Can anybody figure this out for me?

 Paul Lamar


It doesn't say it's CDI.

Brian

You are absolutely right Brian. Good thinking. I guess that is
a case of my seeing what I wanted to see.

Obviously they are just firing the coil over and over again
every 4 or 5 or 6 milliseconds apart as it takes 4 ms or so
to recharge the coil.

At 1000 RPM or 16.666 RPS one has 60 ms to work with in a Wankel.
It takes the e-shaft to rotate once 60 ms. The Wankel fires
once per e-shaft rotation.

At 2000 RPM 30 ms.
At 4000 RPM only 15 ms but still time to fire almost 3 times
per e-shaft rotation.

The Wankel has a moving combustion chamber that moves
the fire (combustion)  past the spark plugs. The combustion
phase last 270 degrees of e-shaft rotation. See the attached
chart.

It would be interesting to install a couple of these in
an RX8 car and see if it improves the MPG at low cruising RPM
by burning all the fuel reducing the unburnt HC emissions
and improving the BSFC.

Now how do we make this into a cap discharge system
that recharges the capacitor in a few dozen micro seconds
allowing us to spark it many times at 6000 RPM  with the
sparks closer together?

A micro second is one millionth of a second.

In that case my questions become valid again.


Paul Lamar

Don't think of it like a charge/collapse/fire system think of it more
like a telsa coil running at a low frequency.

Brian

Do you mean pulse transformer by "telsa coil" ?
I am too dumb or too young to know what a telsa coil is.

Paul Lamar