热EGR氢内燃机的动力性和排放  

Performance and Emissions of Hydrogen Internal Combustion Engine with Hot EGR

作　　者：段俊法[1,2] 刘福水[1] 孙柏刚[1] 

机构地区：[1]北京理工大学机械与车辆学院,北京100081 [2]华北水利水电大学机械学院,郑州450045

出　　处：《内燃机工程》2016年第1期21-25,30,共6页Chinese Internal Combustion Engine Engineering

基　　金：国家自然科学基金项目(51276019);河南省教育厅科学技术研究重点支持项目(14B470016)

摘　　要：基于进气道燃料喷射(port fuel injection,PFI)氢内燃机试验系统,研究了带热废气再循环(exhaust gas recirculation,EGR)系统氢内燃机的燃烧和排放特性。试验结果表明:采用热EGR能增大氢内燃机的滞燃期和燃烧持续期,显著降低缸内最高压力和温度;EGR率增大时平均有效指示压力和循环变动的变化并不显著,对整机的功率输出和平顺工作几乎没有影响,中高负荷时需要采用很大的EGR率才能大幅度降低NOx排放,在高负荷时控制排放所需的EGR率不大,高负荷时过大的EGR率可能造成燃料经济性和动力性的大幅度下降。The hydrogen engine combustion performance and emission characteristics were investigated based on a port fuel injection （PFI） H2 ICE test sysytem equipped with hot EGR system. Experimental results show that using hot EGR can significantly reduce the maximum cylinder pressure and temperature and slightly increase ignition delay period and combustion duration. Increasing EGR rate has no obvious effect on indicated mean effective pressure（IMEP） and working cycle variations, which means EGR has a little impact on the engine power output and ride comfort. When EGR rate is large enough at middle load, NOx emission is reduced greatly, but only a moderate EGR rate is needed for NOx emission control at high load, because an excessive EGR rate would lead to significant reduction in power output and fuel economy.

关 键 词：内燃机 氢内燃机 热废气再循环 燃烧特性 NOX排放 平均有效指示压力 循环变动 

分 类 号：TK464[动力工程及工程热物理—动力机械及工程]