What does a dynamometer mean?

[OscarLee]

A dynamometer is a machine primarily used to test the horsepower of a car, commonly found in auto modification shops to measure the increase in horsepower of a modified car engine. Function of a dynamometer: The function of a dynamometer is to measure horsepower, which involves determining the output torque of the driving wheels and calculating the horsepower value, ultimately generating two curves: the torque output curve and the horsepower output curve. Unit: Horsepower is an old unit of measurement; the international unit kilowatt is now commonly used. As for whether higher power is always better, it is generally believed that under the same displacement, higher power is better. Some car manufacturers use advanced technologies, such as intake valve stroke control, EGR, 5-valve, etc., which inevitably increase power but also mean higher engine costs.