空气变组分富氧进气发动机性能及其排放作用影响分析  

Effect of Oxygen-Enriched Intake Air with Variable Composition on Engine Performance and Emissions

作　　者：金英爱[1,2] 高青[1,2] 马纯强[2] 高淳[2] 隆愈强[2] Yan Y Y 

机构地区：[1]吉林大学汽车动态模拟国家重点实验室,长春130025 [2]吉林大学汽车工程学院,长春130025 [3]University of Nottingham, Nottingham NG7 2RD, UK

出　　处：《内燃机工程》2011年第3期23-27,共5页Chinese Internal Combustion Engine Engineering

基　　金：国家自然科学基金资助项目(50676039)

摘　　要：针对富氧进气发动机性能及其排放作用和影响开展分析,并在单缸四冲程风冷点燃式发动机上进行试验,分别选择不同工况及21%、23%、25%的3种富氧进气浓度,进行发动机性能和排放研究。研究结果表明:富氧进气发动机动力性增强,经济性改善,排放性能优劣并存,其中功率提升、燃油消耗率降低、HC和CO排放改善,在较低富氧程度下作用更加明显,随着富氧程度的增加,作用逐渐减小;在较高富氧浓度下,尽管CO、HC排放仍然降低,但是NOx排放却大幅度提高,因此将富氧程度控制在23%左右。In a single cylinder,four stroke,air cooled,spark ignition engine,the effect of oxygen-enriched intake air on engine performance and emissions was investigated in different speed and load conditions and at different oxygen-enrichment percents of 21%,23% and 25%.The experiment results show that oxygen-enriched intake air can improve engine power and economy,but can not improve the emissions definitely.The lower oxygen-enriched intake air can increase engine power,and decrease specific fuel consumption,and improve the emissions of HC and CO significantly.The undue increment of oxygen concentration would deteriorate these improvement effects.At higher concentration of oxygen,CO,HC emissions are still lower,but NOx emissions increase badly.Therefore,the oxygen-enrichment level should be controlled at about 23%.

关 键 词：内燃机 发动机 富氧进气 性能 排放 

分 类 号：TK417[动力工程及工程热物理—动力机械及工程]