为了分析液力变矩器在装载机作业过程中的动态特性，首先进行了液力变矩器台架试验，得到其静态原始特性;然后对某 ZL50 装载机的 V 型铲装作业和运输作业进行了测试． 在对试验数据处理的基础上，分析了两种工况下发动机转矩的分配情况． 根据牛顿定律，建立了液力变矩器的数学模型，并以此研究了液力变矩器在两种工况下的动态特性． 通过对比液力变矩器变矩比的动态试验值与静态值，发现:装载机运输工况下液力变矩器可以按静态原始特性进行匹配等计算，但铲装作业工况下变矩器角加速度波动范围过大，必须考虑动态特性的影响．

In order to analyze the dynamic characteristics of hydraulic torque converter applied to wheel loader,firstly,the original steady performance of hydraulic torque converter was discovered through a bench test.Second- ly,the V-shaped shovel and transport operations of ZL50 wheel loader were tested.Then,on the basis of test data,the distributions of engine torque were analyzed.Moreover,a mathematical model of hydraulic torque converter was established according to Newton's law of motion and used to investigate the dynamic characteristics of hydraulic torque converter in the two above-mentioned working conditions.Finally,a comparison is made between the dyna- mic test values of torque ratio and the static ones.The results show that the dynamic performance of torque converter can be replaced by the steady one when wheel loader is in transport condition.However,as the fluctuation range of angular acceleration is too large in V-shaped shovel operation，the dynamic characteristics must be considered.