Subj : Battery Trivia
To   : MIKE ROSS
From : TOM WALKER
Date : Tue Jun 14 2005 12:27 pm

MR> MM> My Daughter's '89 Olds Cutlass Ciera has the same setup with the V-6
MR> MM> engine and three double-ended coils.

MR>Some types of electronic ignition fire more than once to better
MR>control the burn and to ensure there are no misses. For example one
MR>type might fire 2 very rapid bursts each time the cylinder is at the
MR>right angle position. Has anyone here heard mention of piezo devices
MR>being used to produce the spark energy instead of the usual coil?

 MSD made the "Multi-Strike" Ignition units popular amongst teh Hot Rod
 group. AND it works. In the days before CAT Converters the Very lean
 mixtures that were required to meet some SMOG requirements,
 especialy in California, particualrly had a problem with Misfiring.
I would doubt any real advantage on Modern computer Controlleed Engines.

I sispect compaired to the present system of using one coil per pair of
Cylindrs or the SAAB system of using One Coil at each spark plug that
the Piezo system would be far too complex. And also being very
mechanical would not be as Reliable.
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