内燃机工程2026，Vol.47Issue(4)：60-70,11.DOI:10.13949/j.cnki.nrjgc.2026.04.007
排气门二次开启对重型车用柴油机排气热管理的影响
Effects of Exhaust Valve Secondary Opening on Exhaust Thermal Management of Heavy-Duty Diesel Engines
摘要
Abstract
To solve the problem of low efficiency of the after-treatment system caused by low exhaust temperature in diesel engines under low-speed and low-load conditions,a thermodynamic performance test bench was set up for a six-cylinder diesel engine,and a GT-Power simulation model was established.A self-developed fully hydraulic variable valve system(FHVVS)was used to achieve secondary opening of the exhaust valve,allowing both the intake and exhaust valves to open simultaneously during the intake stroke.This enables the recirculation of hot exhaust gases to improve exhaust thermal management in the diesel engine.Parameters such as in-cylinder pressure,exhaust temperature,and fuel consumption under different exhaust thermal management schemes were measured experimentally.Through simulation calculations,key design parameters such as the maximum lift,opening duration,and opening phase angle of the secondary exhaust valve opening were optimized.A comparative analysis of parameters such as exhaust temperature and effective fuel consumption rate under different exhaust thermal management schemes was conducted.The results show that the improved internal exhaust gas recirculation(IEGR)exhaust thermal management mode increased the exhaust temperature to above 200℃across all test conditions of the diesel engine,and the effective fuel consumption rate was reduced by 3.1％compared to that of the original IEGR mode.关键词
排气热管理/排气门二次开启/优化算法设计/仿真分析/内部废气再循环Key words
exhaust thermal management/exhaust valve secondary opening/optimization algorithm design/simulation analysis/internal exhaust gas recirculation(IEGR)分类
能源科技引用本文复制引用
甘梓星,林瑞雪,张晋群,付雪青,王天浩,苏立旺,文明,谢宗法..排气门二次开启对重型车用柴油机排气热管理的影响[J].内燃机工程,2026,47(4):60-70,11.基金项目
车用动力系统全国重点实验室基金资助项目(GZWDZCX-25031713) （GZWDZCX-25031713）
车用动力系统全国重点实验室自主科技创新项目(JY052024101) Foundation Funding Project of the National Key Laboratory of Vehicle Power System(GZWDZCX-25031713) （JY052024101）
Independent Scientific and Technological Innovation Project of the National Key Laboratory of Vehicle Power System(JY052024101) （JY052024101）
