内燃机工程2025，Vol.46Issue(2)：11-18,8.DOI:10.13949/j.cnki.nrjgc.2025.02.002
过量空气系数和点火时刻对缸内直喷氢内燃机燃烧与排放特性的影响研究
Effects of Excess Air Coefficients and Spark Timing on Combustion and Emission Characteristics of an In-Cylinder Direct Injection Hydrogen Internal Combustion Engine
摘要
Abstract
Based on a three-dimensional model of an in-cylinder direct injection hydrogen internal combustion engine,the effects of excess air coefficients and spark time on the combustion and emissions were investigated.The results showed that with the decrease of excess air coefficient from 2.5 to 2.1,the peak cylinder pressure increased from 6.9 MPa to 10.5 MPa,and the peak cylinder pressure phase advanced from 18.0° after top dead center(ATDC)to 12.5° ATDC.The decrease of the excess air coefficient increased the rich-mixture region which accumulated near the spark plug and cylinder wall.In addition,with the decrease of the excess air coefficient,the flame speed was accelerated and the combustion temperature was increased,which led to an increase in NOx emissions.With the advance of spark timing from 5° before top dead center(BTDC)to 9° BTDC,the peak cylinder pressure increased from 7.9 MPa to 9.3 MPa,and the peak cylinder pressure phase advanced from 18.5° ATDC to 14.0° ATDC.With the advance of spark timing,the average cylinder temperature increased from 1 900 K to 2 050 K,which led to an increase in NOx emissions.关键词
过量空气系数/点火时刻/燃烧/排放/缸内直喷氢发动机Key words
excess air coefficient/spark timing/combustion/emission/in-cylinder direct injection hydrogen engine分类
能源与动力引用本文复制引用
贾滨,黄泽远,胡祯,周磊,钟力嘉,卫海桥..过量空气系数和点火时刻对缸内直喷氢内燃机燃烧与排放特性的影响研究[J].内燃机工程,2025,46(2):11-18,8.基金项目
国家杰出青年科学基金项目(51825603) National Science Fund for Distinguished Young Scholars(51825603) （51825603）
