进气道喷射式氢发动机回火研究  

A Research on the Backfire in a Port Injection Hydrogen Engine

作　　者：刘兴华[1] 梁虹[1] 刘福水[1] 孙大伟[1] 孙柏刚[1] 孙作宇[1] 张春龙[1] 

机构地区：[1]北京理工大学机械与车辆学院,北京100081

出　　处：《汽车工程》2014年第6期653-656,共4页Automotive Engineering

基　　金：国家自然科学基金(50976014)资助

摘　　要：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。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 occurrence 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.

关 键 词：氢发动机 进气道喷射 回火 

分 类 号：TK463[动力工程及工程热物理—动力机械及工程]