摘要
碳排放并非来自内燃机本身,而是燃料。氢内燃机保留了传统内燃机的主要结构和系统,可以利用工业副产氢气,通过燃烧方式转化能量达到与燃料电池相近的热效率,是实现“双碳”战略的可行技术方向。相比进气道喷射,具有更高的功率和扭矩输出的缸内直喷氢内燃机是目前行业研究的主流,而喷氢器的流量以及气束特性对缸内直喷内燃机的NO_(x)排放有着重要的影响。文章通过对中压直喷喷氢器的流量特性、气束特性及发动机排放特性进行测试研究,发现多孔气束可显著提升贯穿距,有利于缸内氢气与空气的混合,实现近零的NO_(x)排放及可达到50 kW/L的升功率,基本满足整车需求。
The carbon emissions do not come from the internal combustion engine itself,but from the fuel.Hydrogen internal combustion engines retain the main structure and system of tradi⁃tional internal combustion engines,and can utilize industrial by-product hydrogen gas to convert en⁃ergy through combustion in a way that achieves thermal efficiency similar to fuel cells.This is a fea⁃sible technological direction for realizing carbon peak and carbon neutrality strategy.Compared to in⁃take port fuel injection,hydrogen direct injection internal combustion engines,which have higher power and torque output,are currently the mainstream of industry research.The flow rate and gas jet characteristics of the hydrogen injector have important effects on the NO_(x) emissions of the hydrogen di⁃rect injection internal combustion engine.Through testing and research on the flow characteristics,gas jet characteristics,and engine emission characteristics of the medium-pressure direct injection hy⁃drogen injector,it is found that multi-hole gas jets can significantly increase penetration depth,which is beneficial for mixing hydrogen gas with air in the cylinder,achieving near-zero NO_(x) emis⁃sions and reaching a power output of 50 kW/L,basically meeting the vehicle requirements.
作者
尹兆雷
李天云
叶俊亭
伍中宇
李相超
YIN Zhaolei;LI Tianyun;LI Xiangchao;YE Junting;WU Zhongyu
出处
《上海汽车》
2024年第5期11-15,22,共6页
Shanghai Auto
