Power knowledge
The horsepower was originally formulated by the French and Germans, but because the horses they measure horsepower are smaller than normal horses, so with a 50-horsepower engine, it is impossible to imagine a 50-horsepower pull. If you are driving on a motorcycle, you should imagine that 35 horses are more appropriate. The use of (ps) to represent the horsepower unit was the first symbol used by the Germans, and it has been used until now.
What is 1 horsepower? 1 horsepower is the force required to raise an object weighing 75 kilograms (kg) by 1 meter (m) in 1 second, which is called 1 horsepower. In the daily specification table, such as: 70ps/8000 rpm , Which means that the engine can produce 70 horsepower at 8,000 revolutions per minute.
rpm is the English abbreviation for engine revolutions per minute.
What is torque? Torque is also called torque, which is the moment that causes the shaft to rotate. The common unit of torque in XXX is kg-m (the international unit is Nm).
In order to better understand the concept of torque, here are a few examples. For example: Use a screwdriver or wrench to tighten the screw. If the length of the screwdriver or wrench is 1m, add 1kg force to one end of the screwdriver or wrench, then the tightening torque of the screw It is 1kg-m. If the length of the screwdriver or wrench is 0.5m, in order to obtain a torque of 1kg-m, a force of 2kg must be applied. The reverse is also true. If the driving torque is the same, the farther the position is from the center of rotation, the smaller the force generated.
Displacement
How is the displacement calculated?
Bore diameter-the diameter of the cylinder is referred to as the bore diameter.
Stroke-The piston reciprocates in the cylinder. When the piston travels from top dead center (TDC) to bottom dead center (BDC), the distance traveled is called piston stroke, or stroke or stroke for short.
Now take the Honda CBR600RR in 2003 as an example. The engine form: a water-cooled four-stroke parallel four-cylinder 16-valve DOHC engine as an example:
Bore (67.0mm) and stroke (42.5mm)
Calculation method of displacement:
The cross-sectional area of the cylinder X stroke X number of cylinders = total exhaust gas cc
Stroke-42.5mm = 4.25cm
Bore diameter-67.0mm = 6.7cm
Cross-sectional area-3.35 X 3.35 X 3.1416 = 35.25
Cross-sectional area 35.25 X stroke 4.25 X number of cylinders 4 = total displacement 599cc