摘要
针对常规高压共轨系统在喷射过程内喷油压力较低、无法灵活实现喷油速率改变等问题,设计立足国内加工能力和技术工艺的船用柴油机超高压共轨系统,建立系统的仿真模型,通过模型分析系统的压力和喷油控制特性,以及增压装置的关键结构参数对系统性能的影响,结果表明,相比于增压室容积,出油孔直径和阀芯位移对系统特性的影响较大,随着出油孔直径和阀芯位移的增加,增压压力和喷油速率峰值增大,而燃油泄漏率先上升后下降。
Aiming at the problem of conventional high pressure common rail system in the injection process,such as the low fuel injection pressure and unable to flexibly change the fuel injection rate,an ultra-high pressure common rail system of marine diesel engine was designed based on domestic processing capacity and technology.The simulation model of system was established to analyze the pressure and fuel injection control characteristics of the system,as well as the influence of the key structural parameters of the pressure-amplifier device upon the system performance.The results showed that,compared with the pressurization chamber volume,the fuel outlet diameter and spool displacement have greater influence on the performance of this system;with the increase of fuel outlet diameter and spool displacement,the pressurization pressure and fuel injection rate peak value both increase,but the fuel leakage rate increases first and then decreases.
作者
杨昆
周磊
王银
聂涛
熊彪
YANG Kun;ZHOU Lei;WANG Yin;NIE Tao;XIONG Biao(College of Power Engineering,Naval University of Engineering,Wuhan 430033,China)
出处
《船海工程》
北大核心
2023年第6期94-100,共7页
Ship & Ocean Engineering
基金
国家自然科学基金(51379212)
海军工程大学自主立项基金(425317S022)。
关键词
超高压共轨系统
增压装置
特性
参数影响
ultra-high pressure common rail system
pressure-amplifier device
characteristics
parameter influence
