三元催化转化器的快速老化循环试验研究.docxVIP

……………………. ………………. …………………山东农业大学毕业论文题目三元催化转化器的快速老化循环试验研究院部机械与电子工程专业班级10级车辆工程专业届次 14届学生姓名赵秀云学号 指导教师冯天涛二O一四年六月十五日装订线……………….……. …………. …………. ………ContentsAbstractIIIntroduction11 Structure and working principle21.1 The structure of the catalytic converter21.1.1 Catalytic Converter21.1.2 Catalyst31.1.3 Catalytic converters cushion31.1.4 Catalytic converter housing41.2 Three-way catalytic converter works42 Aging of catalytic converters52.1 Heat-inactivated62．2 Chemical inactivation62．3 Mechanical deactivation63 Aging engine bench system73.1 Rapid aging of the engine bench system73.2 R-FOCAS system overview84 Test Data Analysis94.1 The principle method of rapid aging104.2 Engine stand comparison with FOCAS114.2.1 Oil off the aging cycle114.2.2 Test data results124.2.3 Engine bench and FOCAS comparison164.3 L ratio of cyclic174.3.1 L cycle accelerated aging methods174.3.2 Test data results184.3.3 L and b than the conclusions215 Summary21Reference23Acknowledgment24三元催化转化器的快速老化循环试验研究作者：赵秀云 ，指导教师：冯天涛（山东农业大学 讲师）【摘要】：本文首先概述了车用催化转化器近年来发展现状，并就催化转化器的结构设计，工作原理，老化机理等相关问题展开了讨论。针对国内外催化转化器的催化剂组成和结构设计方面进行大量调研的基础上，以改进催化转化器的性能为目标，从减缓转化器的老化入手，设计三元催化器快速老化试验通过FOCAS系统上模拟的RAT-A循环与发动机上的相同循环的对比结果表明，FOCAS系统可用来产生与发动机相同或非常接近的催化剂温度分布；测试结果表明，FOCAS系统能够对催化剂进行与发动机类似的老化。从统计结果上看，这两种老化方法对HC和NOX的老化系数没有区别。而且，对相同的催化剂而言，测试的NOX、HC和CO排放数据也没有明显区别。试验表明，FOCAS系统可提供与发动机相似的催化剂热老化。关键词：三元转化器 快速老化试验 FOCASThe principle of catalytic converters and agingAuthor: Zhao Xiuyun，Supervisor: FengTiantaoAbstractThis paper begins with an overview of the automotive catalytic converters in recent years, development status, and on the structural design of the catalytic converter working principle, aging mechanisms and other related issues at the seminar. The basis for the design of the catalyst composition and structure of the catalytic converter is a large number of domestic and foreign research, to improve the performance of the catalytic converter is the goal, from the start to slow aging converters, catalytic c