reading the crank

[dzorde at aesprodata.com.au]

     How do you know where on the crank stroke you are when all the teeth 
     on the flywheel are the same, you can't really make one longer since 
     the starter motor will then have a winge.
     
     Dan


______________________________ Reply Separator _________________________________
Subject: Re: reading the crank
Author:  diy_efi at coulomb.eng.ohio-state.edu at INTERNET
Date:    13/12/95 2:31 PM


>By the way this is the way that the Yamaha FZR 600 reads the crank,  3 short 
>pulses and 1 long.  And this is a very dynamic engine, so dont flame on only 
>having 4 triggers per rev please.
>
Wow.  The system I'm working on has 144 teeth.  Guess I'll be *REALLY* 
accurate. :-)
     
By the way, the starter ring on the flywheel is an excellent place to pick 
this up, no cogs,
gears or wheels to add, just mill a hole for a reluctive sensor and voila! 
Of course, you may run into a problem if your CPU of choice can't keep up 
(i.e. 8051, etc).