Dynamic dynamometer

At present, steady power measurement and dynamic power measurement can be used to measure engine power. Dynamic power measurement refers to the method of measuring engine power when throttle opening and speed change. Dynamic dynamometer is also called no-load dynamometer because it does not need to apply external load to the engine. This method of measuring power is: when the engine is running at a certain low speed of idling or no-load, the throttle suddenly opens, so that the engine can overcome inertia and internal friction resistance and accelerate its operation, and its acceleration performance can directly reflect the power. Therefore, the corresponding maximum power can be obtained only by measuring a certain parameter in the acceleration process. Because the dynamic power measurement is not loaded, it can be carried out on the vehicle, which is especially suitable for detecting the engine power of the vehicle in use. Steady dynamometer means that the engine exerts a certain load on a hydraulic dynamometer, an electric dynamometer or a chassis dynamometer under the stable state of a certain throttle opening and a certain rotating speed, and measures the rated rotating speed and the corresponding torque, so as to calculate the power. Steady-state power measurement results are accurate and reliable, but the cost is high, which is generally not adopted by traffic maintenance and traffic supervision departments.