底盘测功机是用于测量汽车驱动轮输出功率、转矩和转速的设备。其原理是通过在试验台上模拟车辆的道路行驶工况,对车辆的动力性进行检查。为了模拟车辆行驶时的情况,底盘测功机需要对车辆行驶时的惯量、阻力和路面情况等进行模拟。通常利用飞轮在误差允许范围内模拟车辆的惯量,并利用电磁离合器自动切换飞轮的组合;而车辆在行驶过程中所受的空气阻力、滚动阻力等,则采用 Chassis dynamometer is used to measure the output power of car drive wheels, torque and speed equipment. The principle is to simulate the driving conditions of the vehicle on the test bench to check the vehicle’s power. In order to simulate the situation when the vehicle is running, the chassis dynamometer needs to simulate the inertia, resistance and road conditions when the vehicle is running. The flywheel is usually used to simulate the inertia of the vehicle within the allowable range of error and automatically switch the combination of the flywheels by using the electromagnetic clutch. The air resistance, rolling resistance and the like that the vehicle is subjected to during traveling are adopted