Abstract: The control accuracy of the clutch directly determines the overall control level of the electronically controlled pneumatic automated mechanical transmission (AMT). This paper focuses on the control accuracy of this system. Firstly, it elaborates on the separation characteristics of the diaphragm spring clutch pressure plate and clarifies its basic impact on control accuracy. Secondly, it obtains the clutch separation force curve through real-vehicle tests and systematically analyzes its variation rules and trends. Finally, using the step separation and engagement control of the clutch target position, it collects target and actual position data in real vehicles, compares the following characteristics of two clutch models, and explores the influence mechanism of separation force curve differences on control accuracy. The results provide theoretical support and basic technical references for the selection and design of electronically controlled pneumatic AMT clutches.

Key words: diaphragm spring; clutch; disengagement force curve; AMT

摘要： 离合器控制精度直接决定电控气动机械式自动变速箱（AMT）的整体控制水平，文章 围绕该控制系统的控制精度开展针对性研究。首先，阐述膜片弹簧离合器压盘的分离特性， 明确其对控制精度的基础影响；其次，通过实车测试获取离合器分离力曲线，系统分析其变 化规律与演变趋势；最后，采用离合器目标位置阶跃分离与结合控制方式，实车采集目标和 实际位置数据，对比两种型号的离合器跟随特性，探究分离力曲线差异对控制精度的影响机 制。研究结果可为电控气动 AMT 离合器的选型设计提供理论支撑与基础技术指标参考。

关键词: 膜片弹簧；离合器；分离力曲线；AMT