【作者】 叶明；

【导师】 秦大同；

【作者基本信息】 重庆大学 ， 车辆工程， 2003， 硕士

【摘要】 当今车辆自动变速器分为三类，它们分别是：液力机械自动变速器（AT）、机械无级自动变速器（CVT）以及电控机械式自动变速器（AMT）。电控机械式自动变速器以其结构简单、成本低、效率高，在自动变速器中占有重要地位。在我国，手动变速器占主导地位，利用AMT技术，以较少的资金便能完成手动变速器的自动化改造，大大减轻驾驶员的工作强度，非常适合中国国情。本论文针对SC7130羚羊轿车AMT改装涉及的技术问题进行了一系列的研究，主要工作内容如下：1．分析高速开关阀控制液压缸系统的性能缺点，提出采用直流伺服电机作为离合器执行机构。建立了伺服电机数学模型和基于膜片弹簧的离合器机械执行系统模型，设计了伺服电机驱动离合器执行机构及控制器，仿真结果表明，采用本文设计的离合器执行机构及控制器，响应快，控制精度高，满足车辆起步的要求。2．对JL474Q1发动机进行台架性能试验，利用样条插值方法构造了发动机转矩模型和发动机燃油消耗模型，为AMT起步和换档规律的研究奠定了基础。3．在建立离合器起步模型的基础上，设计车辆起步模糊控制器。对不同油门和不同路况进行仿真，结果表明，采用本文设计的模糊控制器能使车辆很好地满足起步品质的要求，实现顺利起步。4．讨论了不同换档规律的特点，为SC7130羚羊轿车设计了两参数的经济性、动力性和综合性换档规律，并在建立车辆动力学模型的基础上完成了动力性和经济性的仿真研究，为该车型的AMT改造提供了理论依据。5．根据试验要求，采用动态链接库的方法对不同数据采集卡进行混合编程，顺利地采集参数和控制发动机节气门开度及离合器结合速度，利用上下位机多机通信，使上位机控制电涡流测功机，实现了模拟加载。开发了AMT起步台架试验测控软件，为AMT台架试验打下基础。更多还原

【Abstract】 Nowadays automatic gear shifting is divided into three sorts: automatic transmission (AT), continuously variable transmission (CVT), and automatic mechanical transmission (AMT). Automatic mechanical transmission is advantaged due to its simple structure, low cost and high efficiency. Mechanical transmission (MT) vehicles are in the majority in China. These manual transmissions can be changed into automatic mechanical transmissions with low cost. So automatic mechanical transmissions adapt to the situation of China. Focused on the AMT alteration of SC7130, the following researches have been carried out in this paper:1. The performance of electrohydraulic servomechanism has been analyzed. The clutch operation mechanism driven by DC servomotor was put forward. The mathematic models of DC servomotor and clutch operation mechanism have been built. And controller has been designed. Simulation results indicate that the operation mechanism and controller has good performance.2. The numerical model of engine JL474Q1 has been built up base on the engine test which lays a foundation for the search of vehicle starting up and shift schedule.3. Clutch locking controller was designed base on building model of clutch. Simulation of vehicle in different road and throttle opening was carried. The result indicates that vehicle can start up successfully satisfying the criterion with this controller.4. The characteristics of three kinds of shift strategy have been discussed. Economy and power shift strategies with two parameters of SC7130 car has been designed. The simulation result is provided to the project.5. According to the requirement of AMT start up experiment, using Dynamic Link Library to program for different kinds of data acquisition card and transferring data between PC and Multi SCM. In this way data can be acquired successfully and engine throttle、 clutch locking speed and eddycurrent dynamometer torque were controlled by PC programs. Software for AMT start up experiment has also been developed.更多还原