[Diy_efi] Ion Sensing project

[bill.shurvinton at nokia.com]

Not multispark, you just keep the spark going (you have about 40uS to =
recharge).=20

But even in the worst case with multispark you SHOULD have finished all =
of that well before TDC. I suppose the issue is that the more clever you =
try to be with the CDI, the more that the ion sensing needs to be =
closely coupled to the ignition. Or to put it another way, as long as =
you know when the spark decay occurs you can take that into account in =
the sampling.

Bill

-----Original Message-----
From: ext Ville Vartiovaara [mailto:vvartiov at cc.hut.fi]
Sent: 04 July 2002 13:15
To: diy_efi at diy-efi.org
Subject: RE: [Diy_efi] Ion Sensing project



> maintain the spark  was to recharge the capacitor half-way though to
> give a sawtooth, so the voltage will be much higher due to coil. But

Sounds like multispark, which is different idea, but not sure..

But for ion sensing it's important that:
- The spark decays fast (no multispark or similar)
- The ion sensing voltage is below minimum arc-maintaining voltage.
Supposedly that 400V




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