【作者】 高佳明；

【导师】 于海晨；

【作者基本信息】 大连理工大学 ， 检测技术与自动化装置， 2010， 硕士

【摘要】 随着自动变速器技术的迅速发展,电控机械式自动变速器(AMT)在美国和欧洲已实现了商品化。为了提高我国商用汽车的档次和市场竞争力,AMT换挡规律是我国自动变速器发展的一个重要方向,其研究对我国商用车辆的开发具有重要的应用价值和现实意义。针对常规研究中忽略离合器影响的问题,在分析换挡过程中离合器动力学特性的基础上,提出建立考虑离合器影响的AMT整车换挡规律仿真模型,并进行有无离合器影响下的最佳性能两参数换挡规律的仿真比较。本论文在对换挡规律基本理论进行研究的基础上,建立有无离合器影响下的AMT整车基本换挡规律的仿真模型,并进行仿真比较研究。以发动机、变速器、离合器为研究对象,在分析汽车换挡期间发动机输出转矩的部分特性、变速器输出转矩特性、离合器接合和分离过程动力学特性的基础上,并且根据AMT整车换挡规律仿真平台优劣的评判标准,利用MATLAB/SIMULINK工具建立AMT系统模型、AMT最佳性能基本换挡规律模型、汽车动力学的模型以及汽车油耗模型。按照AMT整车基本换挡规律的仿真步骤,进行在考虑离合器影响下的两参数最佳性能基本换挡规律的仿真研究,同时还与忽略离合器影响的最佳性能两参数基本换挡规律进行仿真比较,仿真实验表明汽车在考虑离合器影响后的加速能力要优于忽略离合器影响的加速能力,以及考虑离合器影响后的汽车燃油消耗量要少于忽略离合器的汽车燃油消耗量,具有节能减排的现实意义。在基本换挡规律的仿真研究基础上,论文还建立了AMT整车跳挡换挡规律的仿真研究。通过修改离合器的动态建模、整车换挡规律的换挡逻辑,从而对有无离合器影响的两参数最佳性能跳挡换挡规律进行仿真比较。仿真实验表明汽车在跳挡换挡规律下,考虑离合器影响的仿真模型,无论在动力学特性还是经济性特性都要优于忽略离合器影响的仿真模型,这能够进一步的提高汽车的动力性能和燃油经济性能,降低能源能耗。更多还原

【Abstract】 With the rapid development of automatic transmission technology, automated mechanical transmission (AMT) has become the commercialization in the United States and Europe. In order to improve the class of our country commercial car and market competitiveness,research on shift schedule in automated mechanical transmission (AMT) is an important development direction of automatic transmission.For the development of the AMT system,it has an important application value and practical significance.According to conventional research problem:the clutch is often ignored.Based on the analysis of the clutch influence in the process of establishment of the clutch shift of dynamic model.This paper puts forward establishing the model of shift schedule in AMT.And whether under the influence of the clutch or not, a simulated comparison of the common two-parameter-controlled optimal-power basic shift schedule is made.Based on the analysis of the basic theory on shift schedule in this thesis,whether under the influence of the clutch or not, established the model of shift schedule in AMT, and the model is simulated for the comparative study. As a studying object with the engine,clutch, transmission, based on the analysis on the vehicle engine characteristics of the part output torque、transmission torque characteristics,the joint and detach dynamic model of the clutch of the car during the shifting.And according to the quality criteria of simulation platform for the vehicle shift schedule of AMT,on the basis of the software MATLAB/SIMULINK, a simulated model of AMT system model,AMT optimum performance basic shift-schedule model,automotive dynamics model and car fuel consumption model are made.In accordance with the simulation steps of the basic shift-schedule of AMT, under the influence of the clutch, a simulated of the common two-parameter-controlled optimal-power basic shift schedule is made, and the comparative simulation of the common two-parameter-controlled optimal-power basic shift schedule of AMT, which ignores the influence of the clutch. Simulation results show that the ability of accelerating speed in considering the influence of the clutch is superior to ignore the influence of the clutch. And fuel consumption in considering the influence of the clutch is less than that in ignoring the influence of the clutch, it has saved energy and reduced emission in practical significance. Based on simulation research of basic shift schedule, a simulated of the jump two-parameter-controlled optimal-power basic shift schedule model is made. By modifying the clutch’s dynamic model、shift logic of vehicle shift schedule,and whether under the influence of the clutch or not, a simulated comparison of the jump two-parameter-controlled optimal-power basic shift schedule is made.Simulation results show that vehicle in jump shift schedule,considering under the influence of the clutch,whether the dynamic characteristics or economic characteristics,is superior to ignoring the influence of the clutch simulation model, which can further improve vehicle’s the dynamic characteristics or economic characteristics,reduce energy consumption.更多还原