Hi-resolution Crank angle sensor

[einarp]

>Yes, if you can get a 200 tooth wheel.

Not necessary. Add one sensor instead.


  *     x
  _   _   _   _   _   _
_/ \_/ \_/ \_/ \_/ \_/ \_


Where * is the original sensor, and "x" is the additional one.
Run the signals through an or gate, and the output will give
the same result as having twice as many teeth. And, it will
be a true position, not interpolated like what you could do in
software.

The extra sensor could be placed anywhere on the periphery
of the wheel, but must be between two teeth at the same time
the original sensor is at a tooth. That is; if the wheel is
not the missing tooth type. You could extend further 
to triple the resolution and so on.

And yes, the starter gear on the flywheel is a good source,
in most cases around 150 teeth, and (hopefully) no missing tooth.


--
einarp at ade.no  ( Maserati Biturbo Spyder )