文档介绍：Thesis Submitted to Shanghai Jiao Tong University for the Degree of Engineering Master Study on Emission Control of CA4DF3 economical Stage Ⅲ Emission Diesel Engine Shanghai Jiaotong University Jun,: Wang Zheng Supervisor(I):Gu Liqiang Supervisor(II):Chen Xiying Speciality: Mechanic Engineering 上海交通大学工程硕士学位论文摘要I CA4DF3 经济型国Ⅲ柴油机排放控制研究摘要随着汽车工业的蓬勃发展和汽车保有量的快速增长,我国正逐步进入汽车社会,汽车排放污染物已经成为城市大气污染的主要来源。为减少污染,实现可持续发展,我国于2008 年开始全面执行国Ⅲ排放标准。目前国内市场上存在着大量的低价位两气门柴油机。如果按照国外经验改进,把国内的两气门发动机全部改造成四气门发动机,按目前企业的技术力量和财力来看还有很大难度,并且单体泵、泵喷嘴、共轨系统等电控高压喷射系统昂贵的配套价使得柴油机成本大大增加,难以被大部分国内用户接受。我国柴油机和喷油泵行业都亟需开发一种既能满足国Ⅲ排放要求但价格又相对较低,能适应中国国情的电控燃油系统和技术方案。为了解决这个问题,本文提出了一种以“强化的直列泵+电子调速器+冷却EGR”系统来达到国Ⅲ排放标准的方案,以实现在发动机本体改动不大的前提下实现国Ⅲ排放。最终为国内的机型升级提供了一种成本低,见效快的技术方案。论文在对原机结构和性能进行分析的基础上,根据理论指导并结合国内外其他同类产品的成功经验,有针对性地对进排气系统、燃油喷射系统、燃烧室进行了改进设计。在合理范围内准备了数个方案进行加工试制。并利用三维CFD 软件STAR-CD 对缸内气流运动过程、喷雾过程和燃烧过程进行数值模拟计算,指导优化设计方向,缩短开发时间。本论文的重点研究内容是整机的ESC13 工况排放试验,通过试验结果对比分析各关键系统参数对排放和性能的影响规律和影响机理,并找到最优组合。最终使整机排放满足国Ⅲ标准,达到了课题研究的既定目标。关键词: 柴油机,排放,燃烧,燃油喷射,数值计算上海交通大学工程硕士学位论文 ABSTRACT II STUDY ON EMISSION CONTROL OF CA4DF3 ECONOMICAL DIESEL ENGINE METTING CHINA STAGE Ⅲ EMISSION REGULATION ABSTRACT As the automobile industry flourish developed and the automobile retain quantity quickly increased, China is ing an automobile society. The automobile’s exhaust emission has e the major part of the pollutant in the city’s atmosphere. In order to reduce pollution, to achieve continuable development, China began to implement stage Ⅲemission regulation in 2008. Most of the diesel engines in China market are still the low cost 2 valves per cylinder layout. If we upgrade all these engines to 4 valves per cylinder according to advanced country’s experience, it would be too difficult to be done by diesel engine producer themselves neither financially nor technically, and the expensive electronic control injection system like the unit-pump, the pump-injector mon rail system remarkably rise