Camshaft/crankshaft sense

[John Faubion]

> electronic ignition controller, does the controller take (up to) one
> rotation to make sure that its assumptions about TDC are correct before
> starting to fire the plugs?

Yes but this occurs quite rapidly since it rarely ends up just past the
sensor.

> A second question is, does anyone sense crankshaft and camshaft
positioning
> separately?  This sounds silly, but it would let one sense timing
> belt/chain failure almost instantly, so one could inhibit plug firing
which

Actually if you only used the camshaft sensor you would accomplish the same
thing. Once the cam stops turning you won't fire the plugs or the injectors
again.

John Faubion
jfaubion at beaches.net