Dissertation
Dissertation > Transportation > Road transport > Automotive Engineering > Automotive structural components > Transmission > Mechanical transmission > Drive axle

The Characteristics Simulation Analysis of Power Split CVT Drive System for Vehicle Application

Author LiuXiaoLin
Tutor CuiYaHui
School Xi'an University of Technology
Course Mechanical Design and Theory
Keywords The power shunt CVT drive CVT Dynamic response characteristics Vehicle simulation Clutch
CLC U463.218
Type Master's thesis
Year 2007
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In this paper, vehicle power split CVT drive system as the research object , the in-depth study of the system kinematics and dynamics performance and vehicle dynamics model and simulation analysis of its dynamic response , select and match its parameters valuable theoretical basis , as well as improve the power to shunt the CVT drive theory laid the foundation . Obtained through the analysis of the system 's transmission system steady-state variable speed range , depending on the parameters of the system transmission ratio principle of selecting different parameters of motor function and system matching principle ; further clutch speed characteristics , acceleration characteristic curve proposed together and optimization, and thus the optimal bonding parameters obtained under different initial speed input . Consider system shafting stiffness , damping , clutch semi - engaged system dynamics model , given the characteristic equation of the system , and thus analysis of the system is stable and the necessary and sufficient conditions ; thus power system school analysis shows that the response of the system under a unit step input , analysis of the values ​​of the parameters of the system response . Further cars equipped with the system for the vehicle model , ideal state to meet the engine the best fuel economy conditions the vehicle dynamics model and simulation analysis , obtained the dynamic response of the vehicle , and the response the results were compared and analyzed . In addition, the impact of the situation in relation to vehicle dynamic response analysis, derived engine the best fuel economy requirements CVT ratio change response characteristics ; further on the dynamic response of the system the reverse analysis ; final analysis of the dynamic response of a system planetary transmission structure type car , which gives the system to achieve optimal transmission efficiency and fast response pathways .

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