| Automatic drive is one trend of automatic technologies in recent years. In fact, automatic transmission technology shows us what is the future car, and which is just the first step to complete intelligent drive. There is no end for people to pursue the science and technology, which means any technology existed today, will be developed and improved. For automobiles, which means that we have to improve the existed technologies constantly to satisfy the new requirements from the customers. After several generations'hard work, automatic transmission technology has been applied as a mature technology in today's vehicles. Basically, there are three types of automatic transmissions wisely used in today's automobiles, which are Automatic Transmissions (AT), Automated Mechanical Transmission (AMT) and Continuous Varies Transmission (CVT). Diversity of technology means every technology has its advantages. But at the same time, this implies us that, until now, we have not an ideal equipment to transfer the power. Torque converter is one important element in traditional automatic transmission (AT), which is also used in CVT for improving the torque during start. If we only considering the torque converting performance, the torque converter is without any question a best equipment as transmission. But, torque converter actually is known for its low efficiency and high price as well. These problems always urge on the researchers to find some new design methods for improving the performance of the torque converter. Recently, as people pay more attention on energy resources and environments pollution, people have to solve the torque converter problem as soon as well. Fortunately, development of science gives us new chance to design the torque converter from new perspective. Computer technology, Computational Fluid Dynamics and new test technology make people monitor the torque converter in more essence, which also provide designers abundant resource to design toque converter. Otherwise, the new design method expands the limit of the automatic transmission technologies. "AMT+TC"is the new transmission, which has high efficiency and pass performance. This new transmission works as AMT when the vehicle runs on the good road and uses good performance of torque converter when on the bad one. "AMT+TC"is a great task and the most important duty is how to design torque converter with the modern science and method. This research is not only a development for new type of transmission but also a solution for low efficiency of torque converter. The new design method is used in this project. And it is not as some designers wishes built without considering one dimension theory, but just based on it. New method makes some corrections on the traditional method and mainly uses three-dimensions method. In fact, for a long time, the experiences have told us it was not good way to design the torque converter without one-dimension method. One dimension method and three-dimensions method have their advantages and using both of them is the right way for designing. W305 torque converter is designed with modern methods such as 3-D CAD, CFD and so on. This thesis mainly introduces the methods to test the performances of W305 torque converter. Test is an important way for evaluating the design method. The reliable test results provide the impersonal validation for design. And on the other hand, it also is the base for next step. This thesis include two parts, one is how to build torque converter rig. And the other side is analysis of W305 torque converter. There are 5 chapters in this article and the main content is as follow: The first chapter introduces the development of torque converter design method in recent years and "TC+AMT"system. The second part try to introduce the modern design method used for W305 torque converter briefly. Why I put this chapter here? The reason is the thesis try to give a whole introduce for design method. And on the other hand, this chapter can provide matting for next parts. The design flow, 1-D and 3-D design method are provided in this chapter. W305 torque converter test rig is introduced in detail in the third chapter. Here, the thesis mainly discussed differences between W305 test rig and the other general test rig. The vector dynameters is used in W305 torque converter test rig, which means that the torque can be controlled in four quadrants. This makes test rig with a great ability to analyze torque converter completely and evaluate torque converter very...
|
PDF Full Text Request