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Reply to "RT: What do the throttle positions relate to?"

Kelly Anderson posted:
Hot Water posted:
RJR posted:

Which leads me to ask, when diesels are not idling, do they run at (or near) a specified RPM with a governor controlling feed of the fuel to hold it at that RPM under varying electrical load?

Yes. The Woodward PG Governor. Now of course, everything is computer controlled, especially the electronic fuel injection.

On our SW8, (equipped with a 567 V8) when moved from idle to run 1, she will lug down to a startling degree for a second or so until the governor compensates.  Also when dragging a heavy train up grade, she will lug down a few percent of RPM even in run 8.  if she looses traction, you can hear the engine rpm rise in concert.

Hmmmmm. Sounds like your governor might be a bit sluggish. Maybe a change of oil in the governor might be in order, also what weight oil has been in the governor, and what is being used now? However, a little bit of "speed droop" is not uncommon, and RPM increase during a wheel-slip is common for those older units.

Last edited by Hot Water

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