Alistair Bell wrote:
> my rad fan is 450 W if that helps
>
> alistair
>
> PS i dont see the point in a pwm controlled fan, I would concentrate
> in a more sophisticated temperature interpretation, ie a PID
> controller... monitor rate of temp change to that fan can keep on top
> of things...
>
> but you know, my experience of the fans in real life is that they
> come on, cool the van down and go off.... seem to work fine :)

I'm with the Bell on this one. The radiator on the fan is capable of
creating lots of cool water, and the thermostat opens and closes as
needed to draw from that reservoir. If the engine was seeing huge over
and undershoots in temperature then a better control system would be
warranted. But the large thermal mass of the engine pretty much assures
that temp changes will occur pretty slowly, and the thermostat seems
capable of keeping up with them.

I guess I don't see a problem that needs solving. But I do enjoy fancy
engineering for engineering's sake, too.

--
Mike "Rocket J Squirrel" Elliott
84 Westfalia: Mellow Yellow ("The Electrical Banana")
74 Westrailia: (Ladybug Trailer company, San Juan Capistrano, Calif.)
Bend, OR
KG6RCR