Gear Rattle Analysis of Manual Transmission Based on a Branched Model  

作　　者：吴虎威 吴光强 陈祥 

机构地区：[1]College of Automotive Studies,Tongji University [2]Institute of Industrial Science ,The University of Tokyo

出　　处：《Journal of Donghua University(English Edition)》2017年第1期1-8,共8页东华大学学报（英文版）

基　　金：National Natural Science Foundations of China(Nos.51175379,51575393)

摘　　要：A branched model was established to reproduce the vehicle creeping status and illustrate the mechanism for severe rattle phenomena of a 5-speed manual transmission in this paper.Firstly,a quasi-transient engine model was founded and the effective output torque with the crankshaft angle changing was achieved.Then,the time-varying stiffness of loaded gear pairs was obtained,which was calculated by both bending and shearing deformation stiffnesses through finite element result regression analysis and the contact deformation stiffness through the empirical formula.Finally,the branched model of powertrain system considering LuG re tire property and differential characteristics was established to predict the vehicle creeping status and rattle phenomenon of unloaded gear pairs in consideration of detailed drag torque model,and it would make a solid theoretical basis for further research on gear rattle mechanism and vehicle experiments.A branched model was established to reproduce the vehicle creeping status and illustrate the mechanism for severe rattle phenomena of a 5-speed manual transmission in this paper. Firstly, a quasi-transient engine model was founded and the effective output torque with the crankshaft angle changing was achieved. Then, the time-varying stiffness of loaded gear pairs was obtained, which was calculated by both bending and shearing deformation stiffnesses through finite dement result regression analysis and the contact deformation stiffness through the empirical formula. Finally, the branched model of powertrain system considering LuGre tire property and differential characteristics was established to predict the vehicle creeping status and rattle phenomenon of unloaded gear pairs in consideration of detailed drag torque model, and it would make a solid theoretical basis for further research on gear rattle mechanism and vehide experiments.

关 键 词：branched model vehicle creeping rattle phenomenon quasi-transient engine model time-varying stiffness 

分 类 号：U463.21[机械工程—车辆工程]