Re: G5 fans

Andy Hewitt <wildrover.andy@xxxxxxxxxxxxxx> wrote:

Rowland McDonnell <real-address-in-sig@xxxxxxxxxxxxxxx> wrote:

[..]
That'd depend on where the sensor is, but in this case it's obviously
somewhere that stays cooler when circulation fails. Which is pretty poor
design IMHO.

But without water circulation, the temperature sensor cannot read a
valid temperature unless it's built into the engine casing - built into
the head(s) that get hottest is the only way I can think of doing it
that'd be useful.

That's where they are on most cars, although some do seem to be in the
thermostat housing too.

Makes sense.

Mind you, they often have more than one now,
some may have two sensors, one for the gauge, and another to send data
to the ECU for engine management.

Inlet air temperature gauges are used by ECUs, I do know that - don't
suppose it's a bad idea to let it know about coolant temperature either.
<heh> Make it *properly* intelligent, and prevent the driver flogging
the beast until it's warmed up, that'd be the way.

The average temperature gauge seems to be built into the thermostat
housing where there's no chance of the coolant getting heating up
without the pump running. It seems to be standard.

I must admit, I haven't seen many bikes with temp gauges - I've owned
two with liquid cooling, and neither had one.

Not even an over-temperature idiot light? Rebecca's SV650's got one of
them.

Trouble is there's too many ways to do this,

<puzzled> What makes it trouble, there being lots of ways of doing it?

and they'll all have their
reasons why they did it a certain way.

Convenience is the obvious reason for putting it where it is on my
bikes. I don't suppose they thought about needing to indicate cooling
system failure. I often get the idea that jobs like `designing in that
sort of thing' are given to the spotty youth on the design team, the one
who's just left uni.

Rowland.

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