EGR对富氧进气增压柴油机缸内过程的影响  

Influence of EGR on In-Cylinder Process for a Turbocharged Diesel Engine of Oxygen-Enriched Intake Air

作　　者：倪志海 朱文霞[2] 沈颖刚[2] 

机构地区：[1]云南省交通科学院,云南昆明650011 [2]昆明理工大学云南省内燃机重点实验室

出　　处：《小型内燃机与车辆技术》2016年第3期16-19,24,共5页Small Internal Combustion Engine and Vehicle Technique

基　　金：国家自然科学基金项目(51366007)

摘　　要：运用EGR与富氧进气技术在一台增压柴油机上进行了缸内过程的试验研究,研究了不同EGR率和富氧进气浓度对发动机燃烧过程中缸内最高燃烧压力和最高压力升高率的影响。研究结果表明,在同一工况相同进气氧浓度下,最高燃烧压力随EGR率增加而降低,最高压力升高率却明显升高,但发动机仍能保持平稳运行;在同一工况相同EGR率时,随着进气氧浓度不断升高,最高燃烧压力、最高压力升高率与原机基本相当。A turbocharged diesel engine was used to conduct experimental study of in-cylinder working process by implementing EGR and oxygen-enriched intake air simultaneously. Moreover, maximum combustion pressure and maximum pressure rise rate were studied by combinations of different EGR rate and different intake oxygen concentration on combustion process of cylinder. The results showed that the growing rate of EGR could reduce maximum combustion pressure, but increase maximum pressure rise rate and ensure the engine working under a safety and reliable condition under the same test condition; intake oxygen concentration could keep that maximum combustion pressure and maximum pressure rise rate were the same as the base engine under the same operation condition.

关 键 词：柴油机 EGR 富氧进气 缸内过程 

分 类 号：TK421.27[动力工程及工程热物理—动力机械及工程]