plug readings vs electronics

[Bernard Littau]

> I'm not an art lover really. So I prefer some other way. Would the voltage
> and/or current of the spark during combustion tell us the information we
> want?
> If so, would it make sense to develop a spark voltage/current monitor and
> analyzer?

Hi Bert,

I know that SAAB, for one, uses the spark plugs as a probe into the
combustion chamber after it is used to spark.  Their system uses direct
ignition (one coil per cylinder) and is called Trionic.  I have no idea how
it works, but I bet they have some SAE papers on the subject, if you are up
to doing some research in that direction.

Best,

Bernard Littau
Woodinville, WA

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