内燃机工程2025，Vol.46Issue(4)：64-72,9.DOI:10.13949/j.cnki.nrjgc.2025.04.008
柴油双直喷策略在高负荷工况下的燃烧与排放特性
Combustion and Emission Characteristics of Diesel Dual Direct Injection Strategy Under High Load Conditions
刘芮含 1朱继贞 2钱勇 2吕兴才2
作者信息
- 1. 上海交通大学 中英国际低碳学院,上海 201306||上海交通大学 动力机械与工程教育部重点实验室,上海 200240
- 2. 上海交通大学 动力机械与工程教育部重点实验室,上海 200240
- 折叠
摘要
Abstract
To solve the issues of low thermal efficiency and high emissions caused by long injection duration and poor atomization quality of single injector mode under high-load condition of diesel engine,the diesel dual direct injection strategy was proposed.The combustion and emission characteristics of single and double injector modes under high-load conditions were studied by experiments,and further analyzed in detail by computation fluid dynamics(CFD)simulation method.The results show that the dual direct injector mode presents three stages of heat release.The first stage is the low temperature heat release of the auxiliary injector,the second stage starts from the high temperature heat release of the auxiliary injector,and the third stage is the high temperature heat release caused by the main injector.In addition,the ignition timing under the dual direct injection strategy is advanced,and the center of combustion is closer to the top dead center,thereby leading to the higher thermal efficiency.关键词
柴油机/双直喷策略/高负荷工况/燃烧过程/排放特性Key words
diesel engine/dual direct injection strategy/high-load condition/combustion process/emission characteristic分类
能源科技引用本文复制引用
刘芮含,朱继贞,钱勇,吕兴才..柴油双直喷策略在高负荷工况下的燃烧与排放特性[J].内燃机工程,2025,46(4):64-72,9.
