Butterfly sheet type EGR valve motor torque characteristic measuring device and measuring method

The invention relates to a butterfly sheet type EGR valve motor torque characteristic measuring device and measuring method. The measuring device comprises a torque shaft, a torque arm disc, a connecting flange, a device flange, a torque shaft support, a base and a calibration torque arm, wherein the torque shaft is horizontally arranged on the torque shaft support, the two ends of the torque shaft penetrate through the torque shaft support and are connected with the nut, one end of the torque shaft is provided with the torque arm disc, the torque arm disc is arranged between the nut and the torque shaft support, and the torque shaft is in compression connection with the torque arm disc through the nut; the device flange is vertically fixed to the base, the EGR valve motor is installed onthe connecting flange, an output shaft of the EGR valve motor is connected with one end of the EGR valve driving plate, and the other end of the EGR valve driving plate is connected with the force armplate. The installation a