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livi livi is offline
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Join Date: Feb 2005
Location: South of Sweden
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Relation between torque and effect. Why not linear?

Morning, guys!

Doc Fluffer here. Not posting much these days, but here is a question for you technically inclined.

As far as I remember from school there is a linear and direct relation between work/torque and effect. The former measured in Nm or J and the latter measured in W or horsepower. Time (s) being the third denominator. I hope I remembered that correctly.

That would imply a direct and linear relationship between torque and horsepower in a car engine.

Now, what are the factors in an engine the affect the disruption of this linear relationship? Typically a big diesel truck engine makes a huge torque with a relatively moderate bhp output, while a small race engine develops a lot of horsepower but, conversely, a modest torque.

Is it the volume of the engine? Gear ratings? Density/weight of different engine components? Other things?

Also, where in an engine is torque measured?

I have tried to grasp this particular questions since I was a teenager. Alas, so far, no cigar. Anyone able to explain this so I understand it will get a wild card for free fluffing a whole year.

Thanks!
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