【作者】 王巍巍；

【导师】 权龙；

【作者基本信息】 太原理工大学 ， 机械电子工程， 2003， 硕士

【摘要】 金属带式无级变速器是一种理想的动力传动装置。与常规的液力机械传动相比，汽车金属带式无级变速传动具有性能优良、结构简单紧凑、操作方便、造价低等优点，因而在国外轿车上获得了大量应用，我国也将轿车金属带式无级变速器的开发和研制列入国家重大科技攻关计划。 本文对金属带式CVT综合传动控制作了仿真研究，主要进行了以下几方面的工作： (1)介绍了金属带式CVT的结构、特点、工作原理以及在国内外发展现状。 (2)对车用495G型汽油机试验测试数据进行处理的基础上，建立了发动机的转矩模型、油耗模型。在发动机建模过程中给出了一种处理数据的新方法——网状拟合法。 太欲粗口二大学祠盯士学位论文(3)针对研究需要，在建立发动机模型的基础上求出了发 动机经济性换档线与动力性换档线。(4)分析了在不同工况下的速比控制策略。(5)电一液控制系统方案有两种:单压力回路和双压力回 路方案。本文中采用了单压力回路方案，并对CvT传 动系统、液压系统进行建模仿真。(6)为了判断发动机在不同工况下的工作模式，设计了一 种神经网络—BP网。更多还原

【Abstract】 The Metal Belt Continuously Variable Transmission (CVT) is a kind of ideal transmission. Compared with routine hydraulic-mechanic transmission, it has many merits, such as excellent performance, compact structure, convenient handling and low price and so on. Therefore, it has been used widely. In our country, as one of the key projects, it has been developed and researched.The paper gives simulating research to the general transmission control of the Metal Belt CVT, the following work has been made:(1) The structure, characteristic, work principle and actuality of the Metal Belt CVT has been introduced(2) On the basis of dealing with experimental data to 495G engine, the engine model including torque model, oil consumption model and the rotate speed adjusting model isestablished. During the course of modeling, a new measure named reticulation approximation is given. It can be used to process data.(3) After establishing the engine model, in order to meet the need of study, the economics speed changing line and the dynamics speed changing line are given too.(4) The ratio control policies of different work conditions are analyzed(5) Electronic-hydraulic control system has two loop project: single pressure loop and double pressure loop. The paper choice the first one, aimed at the selected project, modeling and simulating work to the transmission system of CVT are accomplished.(6) In different conditions, the work patterns of engine are different too. In order to judge the work pattern of engine, the NN(Neuron Net) named BP(back propagation) net is designed.更多还原