Starter Teeth Sensor

[Bernd Felsche]

bcroe at juno.com tapped away at the keyboard with:
> On Wed, 12 Dec 2001 13:53:21 -0800 (PST) James Montebello
> <jamesm at lapuwali.com> writes:
> > Watching many teeth also gives you the ability to watch 
> > the rate of change of the crank speed more closely, and 
> > potentially divine things like misfires (which should show
> > up as two anomolously large changes in crank speed 
> > during one or two revolutions) for very sophisticated 
> > control strategies.  

> I also have thought for a long time, that differentiating
> the velocity of teeth moving by would be a good way to
> see the relative power output of each cylinder, with the
> right dispay.  Another project for retirement.

Also published in SAE's SP-1418:
"Indicated and Load Torque Estimation using Crankshaft Angular
Velocity Measurement" by P.M. Azzoni, G. Minelli and D. Moro (DIEM -
univ. of Bologna) and R. Flora and G. Serra (Magneti Marelli -
engine control division) SAE 1999-01-0543

The math's isn't very "comfortable" but necessary for
implementation. Their main concern at the time was the "computing
load" and simplifying the algorithms.

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