西华大学学报（自然科学版）2024，Vol.43Issue(2)：29-38,10.DOI:10.12198/j.issn.1673-159X.5191
燃料理化特性与进气压力耦合对碳氢化合物排放的影响
Study on the Coupling Effect of Fuel Physicochemical Characteristic and Intake Pressure on HC Emission
摘要
Abstract
In this study,the effect of coupling three intake pressures(120,150,and 180 kPa)and the Cetane number,ignition delay period of fuel on hydrocarbon(HC)emissions was investigated by using a modified single-cylinder light-duty diesel engine.Pure combustion diesel(B00),B20 fuel(mixed with a mass fraction of 20%n-butanol and 80%pure diesel),and B20 + 2-ethylhexyl nitrate(EHN)(0.7%mass fraction of EHN added to B20)were used as fuels for experimental research.Experiment results show that,comparing the hydrocarbon emissions of B00 and B20+EHN,HC emissions almost does not change with the intake oxygen concentration when the intake oxygen concentration is higher than 13%,and the HC emissions under different pressures is basically maintained in the range of 0～1 g/(kw·h).The comparison of hydrocarbon emissions of B20 and B20+EHN shows that the critical oxygen concentration is 16%,15%and 13%respectively under intake pressures of 120,150 and 180 kPa.The in-cylinder combustion temperature and combustion duration are the main factors affecting the difference of HC emissions between the two fuels.When the intake oxygen concentration is lower than the critical point of each intake pressure,the dif-ference of combustion temperature in cylinder caused by different cetane number increases the difference of HC emission.With the decrease of oxygen concentration,the influence degree of combustion temperature in cylinder increases.关键词
进气压力/进气氧浓度/HC排放/十六烷值/影响因素Key words
intake pressure/intake oxygen concentration/hydrocarbon emission/cetane number/influencing factor分类
能源科技引用本文复制引用
韩志强,程安琪,李智文,左子农,闫妍,吴怡..燃料理化特性与进气压力耦合对碳氢化合物排放的影响[J].西华大学学报（自然科学版）,2024,43(2):29-38,10.基金项目
国家自然科学基金面上项目(51776177) （51776177）
国防科技重点实验室基金项目(2022-JCJQ-LB-062-0102) （2022-JCJQ-LB-062-0102）
四川省科技计划资助项目(四川省自然科学基金青年科学基金项目)(2023NSFSC0836). （四川省自然科学基金青年科学基金项目）
