货车动力传动系统匹配研究

发布时间：2018-04-27 22:36

本文选题：货车 + 动力性　；参考：《青岛理工大学》2016年硕士论文

【摘要】：货车是人们日常生活不可或缺的货物运输工具,是国民经济发展的重要组成部分。动力性和经济性是货车重要的性能指标,直接影响货车的运输效率和成本,动力传动系统匹配直接影响其动力性和经济性。货车动力传动系统的开发基本为匹配后桥主减速比,发动机和变速箱的选型基本在市场调研和项目立项阶段已选定。后桥主减速比的选定原则为在满足动力性和经济性的国家标准和设计要求的前提下,具备最低的燃油消耗量。本文以某二类底盘改装的载货汽车、厢式运输车和仓栅式运输车为研究对象,匹配多个不同的后桥主减速比,运用AVL-Cruise进行仿真计算,通过评价选择优选后桥主速比。同时对优选的后桥主减速比的车型进行实车测试,进行综合评价对比。本文研究的工作主要如下:1、查阅大量文献,对动力性评价指标参数进行解析,了解美国、欧洲和日本燃油经济性指标控制思路,重点分析国内工信部C-WTVC循环油耗限值和交通部营运货车油耗限值,制定本文研究货车的动力性和经济性设计评价指标。2、深入研究动力传动系统设计计算理论,对发动机数学模型、阻力理论模型和动力性、经济性参数计算进行详细研究,同时针对AVL-Cruise软件的仿真计算进行研究,对影响计算结果准确度的参数进行了着重分析。3、对同一底盘改装的三类货车匹配的后桥主减速比进行AVL-Cruise仿真计算,针对计算的结果进行评价,通过数据对比和图表类比,选出符合三类货车的最优后桥主减速比。4、对三类货车的最优后桥主减速比的样车进行实车测试,通过测试结果对比验证AVL-Cruise仿真计算的符合性,对本文的研究进行综合评价。研究结果表明,后桥主减速比为货车动力传动系统匹配的关键参数,直接影响动力性和经济性的评价指标。同时AVL-Cruise仿真计算可为货车动力传动系统匹配提供较为快捷和准确的计算。
[Abstract]:Freight car is an indispensable means of cargo transportation in people's daily life and an important part of the development of national economy. Power and economy are important performance indexes of freight cars, which directly affect the transportation efficiency and cost of freight cars, and the matching of power transmission system directly affects its power performance and economy. The development of truck power transmission system is basically the main deceleration ratio of the matching rear axle. The selection of engine and gearbox has been basically selected in the stage of market research and project establishment. The principle of selecting the main deceleration ratio of rear axle is to have the lowest fuel consumption under the premise of satisfying the national standards and design requirements of power and economy. In this paper, a modified truck with a second type chassis, a van transport vehicle and a silo grille transport vehicle are taken as the research objects. The main deceleration ratio of the rear axle is matched with several different rear axle main deceleration ratios, and the simulation calculation is carried out by using AVL-Cruise, and the main speed ratio of the rear axle is selected through evaluation and selection. At the same time, the optimal rear axle main deceleration ratio of the vehicle model was tested and comprehensive evaluation was made. The main work of this paper is as follows: 1, referring to a large number of documents, analyzing the index parameters of power performance evaluation, and understanding the control ideas of fuel economy indicators in the United States, Europe and Japan. The C-WTVC cycle fuel consumption limit of the Ministry of Industry and Information Technology in China and the fuel consumption limit value of the operating freight car in the Ministry of Communications are analyzed emphatically, and the evaluation index of the power and economy design of the freight car is established in this paper, and the design and calculation theory of the power transmission system is deeply studied. The mathematical model of engine, the theoretical model of resistance and the calculation of dynamic and economic parameters are studied in detail. At the same time, the simulation calculation of AVL-Cruise software is studied. The parameters affecting the accuracy of the calculation results are analyzed emphatically. The AVL-Cruise simulation calculation of the main deceleration ratio of the rear axle matched by the three types of freight cars modified with the same chassis is carried out. The results of the calculation are evaluated through data comparison and chart analogy. The optimal rear axle main deceleration ratio of three kinds of freight cars is selected. The test results of the model cars with the optimal rear axle main deceleration ratio are carried out. The conformance of the AVL-Cruise simulation calculation is verified by comparing the test results, and the research in this paper is evaluated synthetically. The results show that the main deceleration ratio of rear axle is the key parameter of the matching of truck power transmission system and directly affects the evaluation index of power performance and economy. At the same time, AVL-Cruise simulation calculation can provide a faster and more accurate calculation for the matching of truck power transmission system.
【学位授予单位】：青岛理工大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：U463.2

【参考文献】