重庆大学学报2024，Vol.47Issue(1)：21-30,10.DOI:10.11835/j.issn.1000-582X.2022.008
废气入射管道参数对缸内EGR分层的影响
Effect of exhaust gas incident pipe parameters on EGR stratification in cylinder
摘要
Abstract
To realize exhaust gas recirculation(EGR)stratification in the cylinder of a motorcycle gasoline engine,so as to reduce pump air loss and NOx emission,the intake bypass system in the original engine was transformed into an EGR system.The boundary conditions and initial conditions of the exhaust incident pipe,inlet and exhaust ducts under 3 000 r/min and 60 mg intake air were solved by using the GT-POWER model.These conditions were imported into the CONVERGE model of the engine for calculation,and the exhaust gas incident pipe parameters were determined by comparing the flow characteristics,velocity field and exhaust gas mass fraction in the cylinder under different exhaust gas incident pipe diameters,installation angles and installation distances.The results show that under the condition of 3 000 r/min and 60 mg intake air,EGR stratification can be realized in the cylinder when the exhaust gas incident pipe diameter is 5 mm,the incident pipe inclination angle is 17.5° and the installation distance is 22 mm.关键词
EGR分层/汽油机/CONVERGE仿真Key words
EGR(exhaust gas recirculation)stratification/gasoline engine/CONVERGE simulation分类
能源科技引用本文复制引用
杨川,廖勇,杜永波,李元栋,张力..废气入射管道参数对缸内EGR分层的影响[J].重庆大学学报,2024,47(1):21-30,10.基金项目
重庆市研究生科研创新项目(CYS20017) （CYS20017）
重庆市技术创新与应用发展专项面上项目(cstc2019jscx-msxmX0016).Supported by the Graduate Scientific Research and Innovation Foundation of Chongqing(CYS20017),and the Chongqing Technology Innovation and Application Development Special Support Project(cstc2019jscx-msxmX0016)). （cstc2019jscx-msxmX0016）
