Re: Motor Operation Detection?

On Thu, 19 Mar 2009 20:41:50 -0500, Spehro Pefhany
<speffSNIP@xxxxxxxxxxxxxxxxxxxxxxx> wrote:

On Thu, 19 Mar 2009 19:24:15 -0500, the renowned
ArarghMail903NOSPAM@xxxxxxxxxxxxxxxxx wrote:

On Thu, 19 Mar 2009 16:15:25 -0500, "eeboarder"
<jmeyer@xxxxxxxxxxxxxxxxxxxx> wrote:

I am looking for methods of determining when a automobile-size engine is
operational or not.

So far I have two solutions:

1) Temperature. Hot=on. Cool-off.
2) Magnetic pickup.
If you mean to detect shaft rotation that would probably be best.
But, I would put one on each end of the shaft.

Usually the two ends of the crankshaft ought to rotate together,
except for very brief and rather disastrous scenarios.

Are there any other ideas I am missing?

Oil pressure - will be somewhat laggy, but nowhere near as bad as
Temperature.

Alternator output - be sure to isolate from battery

If it uses spark plugs - monitor spark. No spark, no run.

Plus all the others mentioned

Or vacuum, assuming it's a naturally aspirated engine.

Do fuel injected engines generate enough vacuum? I kind assumed that
most "automobile-size engine"s would be, these days.

I remember vacuum powered windshield wipers. Had to take your foot
off the gas for them to work really well. :-)




On a 52 Husdon, if you really want to know. :-)
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