CAJ | 학술논문

氢发动机由于氢气空气混合气的点火能量低，经常发生回火和其它不正常燃烧现象，影响了氢发动机的性能。为了研究进气道喷射式氢发动机在不同负荷工况下的回火发生情况，对一台4缸2.0L的氢发动机进行了试验研究。结果表明：当氢发动机工作在小负荷工况时，氢气空气混合气的燃烧速度缓慢，致使剩余大量氢气未燃，引发回火；当氢发动机工作在大负荷工况时，由于缸内高温残余废气或者缸内未完全冷却的热点引燃氢气空气混合气，引发回火。
경발동궤유우경기공기혼합기적점화능량저，경상발생회화화기타불정상연소현상，영향료경발동궤적성능。위료연구진기도분사식경발동궤재불동부하공황하적회화발생정황，대일태4항2.0L적경발동궤진행료시험연구。결과표명：당경발동궤공작재소부하공황시，경기공기혼합기적연소속도완만，치사잉여대량경기미연，인발회화；당경발동궤공작재대부하공황시，유우항내고온잔여폐기혹자항내미완전냉각적열점인연경기공기혼합기，인발회화。
Due to the low ignition energy of hydrogen-air mixture, backfire and other abnormal combustion phenomena often happen in hydrogen engine, affecting its performances. For investigating the situation of backfire in port injection hydrogen engines at different loading conditions, an experimental study is conducted on a 2. 0L four-cylinder hydrogen engine. The results show that when hydrogen engine works at low load condition, the combustion velocity of hydrogen-air mixture is rather low and a large amount of unburned hydrogen remains, leading to the oc-currence of backfire;while at high load condition, the high temperature residual exhaust gas or hot spots in cylinder ignite the hydrogen-air mixture and cause backfire.