离合器从动盘性能对汽车起步抖动的影响研究.docVIP

离合器从动盘性能对汽车起步抖动的影响研究* 上官文斌1，孙涛1，郑若元1，谢剑云2，王善南2，侯秋丰2 (1. 华南理工大学 机械与汽车工程学院，广州 510640 2. 有限公司，宁波 31580) 摘要：建立了摩擦离合器接合过程中传动系统动力学特性分析的模型。建模中，考虑到离合器接合过程中存在的粘滑现象，对离合器粘着和滑动状态下的摩擦力矩进行分析，得到了离合器接合过程中的摩擦力矩的计算模型。在进行模型的计算分析时，引入了Karnopp摩擦模型，实现了粘着和滑移状态下，动力学方程的一致性。在已知发动机转速时，计算分析了离合器过程中从动盘的角速度的与摩擦系数随接合面相对滑移变化的关系。研究了离合器从动盘总成的扭转刚度和波形片的轴向刚度对起步抖动的影响。针对两款车存在的起步抖动问题，根据理论计算的结果，对这两款车的离合器从动盘扭转刚度和波形片轴向刚度进行了优化，试验结果表明，利用优化的离合器从动盘的性能参数，两款车的起步抖动问题有了较大的改善。 关键词：起步抖动；离合器接合模型；扭转特性；轴向弹性；实车试验 The influence of driven disc for a friction clutch on vehicle judder during starting Wen-Bin Shangguan1, Tao Sun1, Ruo-Yuan Zheng1, Jian-Yun Xie2, Shan-Nan Wang2, Qiu-Feng Hou2 (1. School of Mechanical and Automotive Engineering, South China University of Technology, Guangzhou 510641 2. Ningbo Hongxie Clutch Co., Ltd., Ningbo 315807) Abstract: The model for dynamic analysis of driveline system including friction clutch is developed in this paper. In the model, the unified formula for calculating friction torque generated by a friction clutch during stick and slip is developed. The Karnopp friction model is used to unify the equations for the driveline system if the clutch is sticking and slipping. The method for estimating the angular velocity of the driven disk is presented if the angular velocity of the engine and the relation between friction coefficient and relative slipping velocity of driving and driven disk of a clutch are known. The influence of the stiffness of driven disk in torsional and axial directions on the starting judder of a vehicle is analyzed. The judders of two vehicles are reduced greatly based on the proposed model and the optimization torsional stiffness and axial stiffness for the driven disks, which validate the proposed model and analytical method. Keyword: Judder; Clutch engagement model; Disc torsional characteristic; Waveform cushion axial elastic; Vehicle experiment 0 前言* 汽车离合器由主动部分、从动部分，压紧与分离机构等组成，其中主动部分与发动机的转速的输出端（飞轮）连接，从动部分与变速器的输入轴相连，压紧与分离机构是使离合器的主动部分与从动部分结合或分离的装置。离合器的从动部分包括从动盘、摩