JD wrote...
> Almost all diesels have an idling governor of some kind, either purely
> mechanical or in the computer software, and what you have experienced is
> the governor increasing the fuel quantity injected to maintain idling
rpm.
Years ago, before the advent of computers in cars, etc. a mate had a brand
new Landcruiser, HJ60 wagon.
We were up the bush. We discovered that the governor would select a high
idle whenever the A/C was turned on. So, when going down a steep incline,
the vehicle wanted to go quicker than what the driver wanted. So he turned
the A/C off.
Thing is, I couldn't figure out why the idle would be biased up like that.
You'd think that the load that the compressor put on the engine would slow
it, so this should force the governor to open up to bring the revs back to
idle speed. Same as if you're in neutral, clutch in, select a gear then
slowly let the clutch out. Engine revs would slow, governor would open to
bring them back to idle, if you didn't touch the throttle.
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