Jin Li

China North Vehicle Research Institute · Automatic transmission

Based on the test data of a series of pump speeds and working conditions, a matching method based on the general characteristics of the hydraulic torque converter was proposed. Firstly, error sources of the traditional matching method were analyzed. Secondly, this paper used the back propagation (BP) neural network, which is good at fitting and gen...

High power-density torque converter is prone to cavitation due to high circular velocity and low local pressure, consequently leading to performance degradation. Both experimental and numerical studies are carried out on the cavitation phenomena in a torque converter. A series of hydraulic performance tests are performed under different wheel speed...

针对旋转流体机械的全流道模型仿真方法成本高，且网格质量难以保证，提出了一 种基于单流道瞬态仿真模型的伪集总叶片法（PLSM）来计算叶轮转矩和分析变矩器的叶轮交 互效应及其内部流场特性。建立了 D400 型液力变矩器的三维瞬态单流道仿真模型，提出基 于 PLSM 来计算叶片和叶轮的时域转矩，并以此进一步分析变矩器的叶轮交互效应及其对液 力变矩器性能的影响。该方法得到的泵轮，涡轮和导轮的转矩结果与实验结果最大误差不超 过 11.1%，原始特性的误差小于4.37%，性能特性与理论及实验结果一致，表明该方法有效 可靠，不仅可在保持精度的同时降低计算成本，同时对变矩器等旋转流体机械的叶轮交互效 应的转矩及内流场特性深入研究，具有较强理论指导和工程实践意义。

Using computational fluid dynamics (CFD) and test methods, the influence of the working oil temperature on the original characteristic parameters of torque converter (torque ratio k, capacity coefficient , and efficiency n), pump torque Tp and turbine torque Tt. Since working oil temperature mainly influences the density and viscosity of the oil, u...

To obtain the original characteristic of torque converter automatically and efficiently, a test automation system of torque converter is set up based on electric power cycling technology, and a test automation software is programmed by Labview language based on serial communication and technology. This test automation system realizes the load elect...

To solve the strength problem of blade wheel of a high-power torque converter used on tracked vehicle a analysis model is set up for the blade wheel strength of torque converter based on the one-way fluid solid interaction 4 FSI5 theory． A globally conservative interpolation algorithm is used to convert the fluid pressure load from flow field mesh...