RE: Franco gear

["Dupree, Jim" <dupree@alldata.com>]

The Audi V6 operates this way. It uses 3 "Double ended" ignition coils
that fire a spark at each end, one "positive" and one "negative". The
system then only has to control 3 coils instead of  6. the VW VR6 does
it this way too, probable many others.
Jim Dupree
1984 4ksq
1984 4ks

>----------
>From: 	audistuff@juno.com[SMTP:audistuff@juno.com]
>Sent: 	Friday, November 14, 1997 5:05 PM
>To: 	phil@isham-research.demon.co.uk
>Cc: 	quattro@coimbra.ans.net
>Subject: 	Re: Franco gear
>
>
> I was just not sure if the change in the hall effect sensor
>>> position relative to the crank sensors would mess up the computer's 
>>ability
>>> to correct the timing.
>e_.  As far as the 
>>flywheel-
>>based sensors are concerned, these events are indistinguishable - a 
>>'phase' 
>>signal is required to determine which of the two flywheel pulses 
>>within a 
>>complete cycle is actually the firing stroke.  Once this is done, the 
>>ECU can 
>>disregard the Hall sensor completely.
>
>My Kawasaki motorcycle fires every crank revolution shooting a spark
>at the end of the exhaust stroke.  Do any autos with crank fire do this
>or is it too much of a problem given the overlap and subsequent presence
>of fuel charge at the top of the exhaust stroke?
>
>
>Paul Anderson, Cheyenne, WY  Private email:AndersonPaul@juno.com
>