电控机械式自动变速器（AMT）换档规律的研究

【作者】 张国胜；

【导师】 方宗德；

【作者基本信息】 西北工业大学 ， 车辆工程， 2005， 硕士

【摘要】 电控机械式自动变速器(Automated Mechanical Transmission,AMT)是一种新型的自动变速系统,其通过对手动固定轴式变速器和干式摩擦离合器的自动化改造从而实现了选档、换档以及离合器和油门的自动操纵。AMT技术适合我国国情,有着广泛的市场和发展前途。 换档规律是电控机械式自动变速器的灵魂,它是判断换档时机的依据。在应用中,通过将采集的车辆行驶状态与换档规律相对比,从而判断是否达到最佳的换档点并自动执行换档操作,这样大大减轻了驾驶员的疲劳,提高行驶安全,同时使整车具有较好的动力性及燃油经济性。本论文选择电控机械式自动变速器换档规律这一关键性问题作为研究对象,研究目的是为AMT制定最佳的换档规律以提高车辆的动力性和燃油经济性。 通过对影响车辆动力性和燃油经济性的因素进行分析,本论文推导了最佳动力性和最佳燃油经济性换档规律的制定方法。为解决质量影响问题,作者提出了一种变结构的最佳换档系统,丰富了换档规律理论。鉴于计算机仿真技术与实车测试相比可以节省大量的人力物力,本论文在进行换档规律的设计中,采用Matlab/Simulink仿真工具箱建立了最佳换档规律的仿真模型,利用此仿真模型对制定的最佳动力性和最佳燃油经济性换档规律进行仿真,仿真结果表明本论文所建立的换档规律是合理的。更多还原

【Abstract】 Automated Mechanical Transmission, as so called AMT, is a new-style transmission system. AMT technology applies the automatic technology to the manual mechanical transmission and makes the selection-gear, shift, clutch and throttle implement automatically. AMT technology is suitable for the situation of our country, and has an expansive market and development foreground.Shift schedules decide the time to shift and are the soul of the AMT. When the AMT is working, by comparing the states of the vehicle with the optimal shift schedules, the AMT decides the optimal shift time and achieves the shift automatically. This will lessen the tiredness of the driver and improve the safety. At the same time, the power and fuel-economy of the vehicle can also be improved. The author chooses the shift schedule as the key technology problem to be researched and the main study aim of this thesis is to get the optimal shift schedules for the AMT and so improve the power and fuel-economy of the vehicle.Through analyzing the influence factors of power and fuel-economy for the automobile, the author get the establishment methods for the optimal-power shift schedule and optimal fuel-economy shift schedule. In order to solve the influence of mass on the shift schedule, the author presents a variable-structure-controlled shift system. This enriches the theory of shift schedules. Because the computer simulation can save a lot of manpower and material resources comparing with the true-car test, so in this thesis, the author uses the simulation toolbox Matlab/Simulink to set up the simulation model for shift schedules. Using this model, the optimal-power shift schedule and optimal fuel-economy shift schedule above are simulated and proved to be reasonable.更多还原