brulaz wrote:
wnjj wrote:
...
duty-cycle (not miles but percentage of time running at or near max power output.
Asked about this earlier.
Just what do people mean by duty-cycle?
You've given two interpretations above.
I've read articles referencing "medium-duty" trucks where all they talk about is their GVWR.
So when the O.P says "as HP goes up, Duty cycle goes down", exactly what is meant?
In electronics duty cycle is the percentage of time "on" compared to total time so to me engine duty cycle is the percentage of time spent working hard. In simple terms this usually means a high HP, high strung motor won't last if you run it full out all the time. This is why the same engine is often de-rated for heavier-duty use.
Service life is the total miles before the engine is worn out.
