When running in conventional mode, what controls the Sound of the revving up of the diesel rpms? Is it the track voltage or the sensor on the motor flywheel.
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I don't know what u are talking about please ask a better question!
Edited.
Good question! I'd like to know the answer too. This also applies to other brands of engines. On some it's the amount of voltage applied, but I don't know if this applies to all engines, including those with flywheel sensors.
I would "think" that it's the flywheel sensor on engines with cruise control, but to be truthful, I'm not really sure.
sensor on fly wheel and voltage some have bemf
Bemf?
back electrical motor function it measures th current going in verse the amp draw and tells it sound to rev up or down they do that a lot in dcc
So the motor without the sensor.
yes
best thing would be is call mth and talk to a service rep got to have patience to get through though
It is not back emf for MTH engines. Nor Lionel with sensor. Processor takes in all inputs of track voltage and tach reader. Frankly not sure which actually triggers it, though the track voltage in conventional is seen first. G
i stand corrected thank you
The diesel RPM sound is directly controlled by actual engine speed as indicated by the striped-flywheel sensor feedback. Of course this is proxy behavior.
In conventional, let's say the diesel is humming along at a mid-range RPM sound and approaches a steep uphill grade and slows down or even stalls. Track voltage is the same...but the engine/flywheel slows or stops. The sound will rev down.
In conventional if the flywheel tape falls off or the tach sensor is damaged, you lose cruise-control and the engine runs at "full speed" (whatever speed full track voltage can sustain). This is because the electronics is getting no feedback from the tach and "thinks" the engine is stopped and hence applies the max voltage available. So even if you crank up track voltage with the diesel ripping around the track, if you listen carefully the diesel RPM sound will be at the lowest (zero speed) setting!
Thanks Stan for a great explanation and totally makes sense because loosing the signal on the op amp input would drive the op amp output to increase rpm's make's perfect sense!
Alan
From what I hear, both motor RPM and voltage effect the sound. The diesel rev speed increases as does blower whine with increased SMPH. When going up an incline the sound is more labored. The labor seems more pronounced with steamers. Steamers also seem to drift when going downhill.
