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The Dynamic Simulation Research of CVT Based on Virtual Prototype Technology

Author: ZhangYongHui
Tutor: LiuMingShu
School: Jilin University
Course: Vehicle Engineering
Keywords: CVT ADAMS Flexible body Dynamics simulation
CLC: U463.212
Type: Master's thesis
Year: 2011
Downloads: 131
Quote: 1
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Abstract


The transmission is the most important automotive driveline components, while the transmission system as a subsystem of the chassis has an important impact on the vehicle of power, economy and comfort. Traditional transmission vehicle was frequently shift will lead to driver fatigue, the stepped transmission shift shock comfort affected. The continuously variable transmission is a transmission device, refers to the effect of its control system, so that the system can be realized in the case of input rotation speed constant rotational speed of the output shaft of the continuously changes within a certain range, in order to adapt to the changing needs of the external load. With the continuous development of industry, especially the automotive industry technology, continuously variable transmission device is getting higher and higher, but many domestic enterprises institutions in most of the less experienced CVT, the lack of a mature and reliable dynamic model CVT dynamics modeling and optimization of design and analysis methods, so try and kinetic analysis of reality makes sense. CVT in the history of the research and development status, analysis of other structural characteristics of the CVT and CVT superiority as well as insufficient described. Brief metal mechanical structure with a continuously variable transmission, as well as the various parts in which the role of the analysis of the basic geometric relationship of the metal belt drive, a metal band with a long the cone wheel package angle, speed ratio and the ratio change formulas and explains the movement of metal belt CVT relationship, the analysis shows that the basic theory and the works of the metal belt CVT. CVT metal belt tension analysis, the metal block stress analysis carried out a detailed analysis of the axial clamping force and torque transmission characteristics, to arrive at a metal belt CVT clamping force with the impact factor of the speed ratio, more late the ADAMS model simulation parameters set set the theoretical basis. UG software modeling and analysis, the first application is a powerful solid modeling functionality with reference to the size of the entity to the various parts of the CVT geometric modeling, assembly, and form a virtual prototype to verify design reasonable, modify some unreasonable parameters to optimize the performance of prototype model. For their metal with flexible processing problems using ANSYS finite element analysis software for processing, flexible body neutral file and imported into the ADAMS model, its simulation more precise below CVT dynamics simulation analysis reliability. For already established ADAMS model constraints and drive settings. The speed of the belt in the piece of metal and the metal of the package at the corners of the cone wheel and the trend of the relative speed, the foregoing theoretical analysis verified. For people tend to ignore the metal band with the ratio change and resulting offset related simulation conclusions, and the inevitable loss of certain optimization idea. Finally, summarize their work done, and to explore the possible problems in the design, the next stage of work were prospected.

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CLC: > Transportation > Road transport > Automotive Engineering > Automotive structural components > Transmission > Mechanical transmission > Transmission
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