![]() Piston Force = Pressure on piston face x piston face area = P x π x (Bore/2) 2 So how do we calculate this Piston Force and Crank Pin offset? ![]() Torque = Piston Force x Crank pin offset - (Picture 2) ![]() We can see that torque and piston are related in someway, but how so? Like this: Picture 1 below shows how the downward force of the piston is translated into a torque ‘force’ on the crankshaft via the connecting rod. (For multiple pistons, remember to add the torque for each piston). The torque that an engine develops is a result of the torque exerted by the piston on the crankshaft. ![]() For this post, I will explain the second concept – how torque is calculated inside a bike engine Engine torque calculation KTM X-Bow Engine Last week I explained the relationship between horsepower and torque. ![]()
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