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The power data provided by the motorcycle factory is generally measured from the crankshaft

Update:20-12-2019
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Horsepower is a unit of power obtained by multiplying t […]

Horsepower is a unit of power obtained by multiplying torque with engine speed. Torque is a unit of power actually obtained during engine testing. This force is actually the kinetic energy produced by the combustion of oil and gas in the combustion chamber, which pushes the piston, and then uses the piston rod to drive the crankshaft to run. The greater the torque of the engine, the better the acceleration performance of the motorcycle.

The force generated by the piston connecting rod driving the crankshaft is "torque".

The common units of torque are Newton meters (Nm) and kilogram meters (Kgm), both of which can be found in the specification table of motorcycles, and can also be converted by simple calculations. Just multiply the data of kilogram meters by 9.8 Then you can get the torque data in Newton meters. Torque can be said to be representative of the combustion situation of the engine. The better the combustion condition, the more sufficient the power generated by combustion, the greater the driving force obtained by the piston, and the greater the output torque naturally after the rotation of the crankshaft. In addition to the amount of torque that varies depending on the displacement of each engine, the engine speed output by its maximum torque will also vary slightly due to different tuning. Each engine has a relatively good combustion timing. If you want to take into account both the high speed range and the low speed range, you need to rely on variable mechanisms, such as variable valve timing, variable intake manifold, etc. The two engine settings are placed on the same engine to create a wide high-torque output belt.

Before getting the horsepower and torque data of a new motorcycle, you must first understand that this data belongs to the so-called shaft output or wheel output power. The shaft output power referred to here is the power data measured from the crankshaft, and the wheel output refers to the power data measured from the tires. In general, if there is no special emphasis, the power data provided by the motorcycle factory is measured from the crankshaft. The engine is directly connected to the power test machine and the data is directly run out. The power output by the shaft does not pass through the transmission system, it is just the performance of the engine.

In terms of horsepower, if the wheel output horsepower is measured from the tire through the transmission system, there will be a certain percentage of loss whether it is gear transmission or belt transmission. The wheel output horsepower obtained through the transmission system will have a certain percentage of loss. And the torque part, after transmission of the transmission system, there will be at least two more deceleration amplifications, although the wheel output torque will be less than the shaft output, but after deceleration, the data will be amplified instead. Overall, although the tires are not as fast as the engine, the torque is amplified. If you put a gear on a horsepower machine to test the power output of the wheels, you will find that the torque output of the rear wheels is significantly higher than that of the high gear, and the horsepower is closer. When an engine factory develops an engine, it is directly connected to the power engine for various tests.

https://www.tspemotor.com/

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