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关键词： EEK Noise   Multi-body dynamic model   Vibration   Clutch   NVH  

摘要： A new "E-E-K" (bionic) noise was generated during clutch engagement. By testing the vehicles with the EEK noise, the key parts for EEK noise and the motion modes were pointed out. The module of clutch engagement process was built. The stability of the system was analyzed based on the theory of Hurwitz. Then the multi-body dynamic model of the clutch system was built, and the corresponding EEK noise-vibration model system was created. A system vibration mode corresponding with EEK noise was established in the model, which simulated and reproduced the noise and vibration mechanism of the vehicle testing. All these verified the consistency between vehicle testing and model. Based on the multi-body dynamic simulation, the key component for EEK noise had been clarified, and the further research direction of EEK noise was pointed out.

关键词： Noise reduction   Vibration suppression   Vehicle accelerating   Clutch vibration   DYNAMIC-ANALYSIS   RATTLE   STIFFNESS   BEHAVIOR   SYSTEM   GEARS  

摘要： Vehicle accelerating noise is a troublesome issue commonly existing in automobiles, leading to negative passenger experience. Considering real experimental results and practical issues, a nonlinear 3-degree of freedom (DOF) torsional model of the clutch system is developed for reducing abnormal noise during vehicle accelerating. In this model, the nonlinear characteristics of the multi-staged clutch damper and the gear backlash are carefully studied. This greatly facilitates the analysis of the vibration transmission characteristics of the clutch and helps understanding of the influence of each critical physical parameter on noise generation. To reduce the accelerating noise, an optimization method for the clutch dynamics is proposed, based on the parameter analysis results, and the effectiveness is validated both in simulations and experiments. (C) 2016 Elsevier Ltd. All rights reserved.

关键词： 汽车离合器   使用寿命   行车安全   驾驶习惯   驾驶员   重大隐患   变速器   发动机  

摘要： 汽车离合器的作用主要是承担切断或传递发动机向变速器输入的动力，是一个对于行车及行车安全至关重要的部件。有良好驾驶习惯的驾驶员所驾驶车辆的离合器，可供汽车累计行驶20万公里。而有不良驾驶习惯的驾驶员所驾驶车辆的离合器，则很容易损坏，使其使用寿命大大缩短，或仅用几次，或仅用几天，或仅行驶几百公里。对于损坏的离合器如不及时维修或更换，则对行车安全埋下重大隐患。

关键词： 离合器   换挡   新车  

摘要： 近日，Kawasaki透露出了两台新车——Z650和Z900。Z650替代ER-6n，搭配滑动离合器和换挡辅助使换挡更加轻松，同时790mm的座高相对于ER-6n来说也更加亲民。

关键词： 离合器   压盘   温度场分析   温度测试   热结构耦合  

摘要： 为解决离合器压盘在使用过程中的断裂问题,建立了离合器压盘热变形与应力的分析模型。建模中,考虑了波形片轴向非线性特性和摩擦因数随转速差的变化。利用模型对离合器压盘接合过程中的温度分布进行仿真分析,并通过实测验证模型的正确性。基于分析结果,提出压盘改进方案,并进行装车测试,离合器压盘未出现断裂情况,证明了本文的建模方法与分析过程的正确性。

关键词： 离合器   动力模型   滑磨功   仿真  

摘要： 对起步过程中离合器的接合过程和动力传递状态进行了分析,在构建动力学模型的基础上利用Simulink软件对发动机模型、离合器模型进行了建模仿真分析,给出了动态求解滑磨功的一种仿真方法 ,并研究了压紧时间对起步过程滑磨功的影响。

关键词： 离合器   使用寿命   行车安全   变速器   发动机   汽车  

摘要： 汽车离合器的作用主要是承担切断或传递发动机向变速器输入的动力，对于行车及行车安全是一个至关重要的部件。

关键词： 变速箱   路虎   捷豹   DCT   车型设计   离合器   混合动力   发动机  

摘要： 捷豹路虎正式发布了为纵置发动机车型设计研发的“Transcend”变速箱。这款全新8速双离合变速箱（DCT）的传动比范围达到了20：1，包含有8个前进挡和2个倒挡。同时，新变速箱还对混合动力车型进行了适配，包括在离合器处预留电动机，同时离合器可将变速箱与发动机输出轴断开连接，实现纯电动模式。另外，变速箱的后端还为四驱车型预留了分动箱和中央差速器。