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What is no load condition and full load condition in Engine Testing ?

What is no load condition and full load condition in Engine Testing ?

What is no load condition and full load condition in Engine Testing ?

(OP)
What is the difference between no load engine running and full load running?

RE: What is no load condition and full load condition in Engine Testing ?

Well, on a dyno, for no load we set the the dyno load to zero, and gently open the throttle up, so the rpm sweeps up from idle.

for full throttle, we open the throttle up all the way, and then adjust the dyno load to sweep through the full range of rpm. It is often easier to do that from the red line down.

Cheers

Greg Locock


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RE: What is no load condition and full load condition in Engine Testing ?

«No load running» means that there is no output torque available. In other words, the throttle is adjusted just enough to maintain the chosen rpm constant.

«Full load running» means that there is the maximum torque that the engine can produced at the chosen rpm available at the crankshaft. This condition always happens at full throttle. To achieve that, you must apply a resistive torque on the crankshaft, otherwise the engine rpm will only increase until the engine's rpm limit (i.e. failure).

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