Method for testing constant speed ratio performance of hydraulic torque converter

The invention discloses a method for testing the constant speed ratio performance of a hydraulic torque converter. The method comprises the following steps of: (1) determining a test input torque Tb;(2) fixing a to-be-tested hydraulic torque converter on a test bench, and carrying out a fixed torque test; (3) determining the speed ratio i of the output rotating speed to the input rotating speed to be tested; (4) calculating a capacity coefficient Ci at a position where a speed ratio needs to be measured; (5) determining an input rotating speed nbi target value of each speed ratio point of theconstant speed ratio test; and (6) determining an output rotating speed ni target value of each speed ratio point of the constant speed ratio test. The method can guarantee the consistency of the input torque of each speed ratio point, can directly measure the data of a given speed ratio point, and avoids the errors caused by the interpolation of a fixed torque test method. 本发明公开了一种液力变矩器定速比性能试验方法，包括如下步骤：1)确定试验输入扭矩Tb；2)将待测