摘要
为了降低小型通用汽油机的排放并能达到美国EPA III阶段法规要求,并考虑成本因素,一般通过加装氧化催化后处理装置和二次补气技术。论文以158F小型通用汽油机氧化催化后处理系统为研究对象,采用模拟和试验相结合的方法对其内部流动过程进行仿真研究。研究结果表明:催化器前端面存在大尺度流动结构,会对污染物转化效率产生影响;建立的数值模型和计算方法可为小通机满足未来严格排放法规,提供后处理系统的设计优化依据。
A aftertreatment system with the oxidation catalyst and secondary air supply is usually applied to small gasoline engines to meeting the requirements of the USA EPA III stage regulations. In this paper, the aftertreatment system of a 158 F universal gasoline engine was investigated by numerical simulation and engine test. The internal flow process is simulated and studied by means of the combination of simulation and test.The results show that the conversion efficiency of pollutants is influenced by the large scale flow structure in the inlet of the catalytic converter. The numerical model and calculation method can provide theoretical direction for the design and optimization of the aftertreatment system.
作者
赵庆良
王磊
杨海岳
帅石金
ZHAO Qing-liang;WANG Lei;YANG Hai-yue;SHUAI Shi-jin(Suzhou Automobile Research Institute of Tsinghua University,Wujiang 215200,China;College of Mechanical and Electrical Engineering,Yantai University,Yantai 264000,China;Zhejiang Zhongjian Technology Co.,Ltd.,Zhejiang 321300,China;State Key Laboratory of Automotive Safety and Energy,Tsinghua University,Beijing 100084,China)
出处
《内燃机与配件》
2019年第4期3-5,共3页
Internal Combustion Engine & Parts
基金
国家重点研发计划项目(2017YFC0211301
2017YFC0211305)
关键词
小型通用汽油机
后处理系统
氧化催化
数值模拟
universal small gasoline engine
aftertreatment system
oxidation catalyst
numerical simulation
