某混动变速器驻车机构临界车速计算、仿真与验证  

Locking Velocity Calculation,Simulation and Validation of a Hybrid Transmission Parking Mechanism

作　　者：黄鹏程[1] 蔡昀宁 HUANG Pengcheng;CAI Yunning

机构地区：[1]泛亚汽车技术中心有限公司,上海201208

出　　处：《上海汽车》2024年第3期30-34,46,共6页Shanghai Auto

摘　　要：驻车机构是混动变速器中防止车辆滑行的一种安全装置。文章以某混动变速器为例,首先对挂入P挡的临界车速进行了理论计算;随后应用ADAMS/View软件建立驻车机构的多体动力学模型,对驻车挂入过程进行了仿真,得到临界驻车速度的仿真值;最后通过台架测试获取了临界驻车速度的试验值。结果表明:理论计算独立考虑棘轮和棘爪的运动,结合两者的几何关系来确定临界速度,精度相对较低;而动力学仿真综合考虑了系统几何特征、相互动力学关系和整车应用环境,具有更高的精度,能准确预测实际临界驻车速度。另外,动力学仿真模型还能进一步用于冲击强度、结构耐久和操纵轻便性等综合性能评估。The parking mechanism is a safety device in the hybrid transmission system to pre⁃vent the vehicle from rolling.Taking a certain hybrid transmission system as an example,the theoreti⁃cal calculation of the critical vehicle speed for locking the parking gear is conducted at first.Subse⁃quently,a multi-body dynamics model of the parking mechanism is established using Adams/View software to simulate the process of engaging the parking gear and obtain the simulated value of the critical parking speed.Lastly,the value of the critical engagement parking speed is obtained through bench testing.The results show that the theoretical calculation independently considers the motion of the ratchet and pawl,combining their geometric relationship to determine the critical engagement speed with relatively lower accuracy.On the other hand,the dynamics simulation comprehensively considers the system's geometric characteristics,dynamic relationships,and the overall vehicle appli⁃cation environment,providing higher accuracy and the ability to accurately predict the actual critical parking speed.Furthermore,the dynamics simulation model can also be further used for comprehen⁃sive performance evaluations such as impact strength,structural durability,and ease of operation.

关 键 词：驻车机构 变速器 动力学 ADAMS 软件 仿真 

分 类 号：U469.7[机械工程—车辆工程] U463.212[交通运输工程—载运工具运用工程]