CAJ | 학술논문

针对氢燃料发动机存在的问题及废气余热的流失,提出利用废气余热在线制取富氢混合气作为发动机的燃料。在一台点火式电喷汽油机上,采用余热制氢装置,在发动机台架上,利用AVL Digas4000Light五气体废气排放仪进行了性能研究。结果表明：通过稀薄燃烧可显著改善NOx和CO排放,NOx较原汽油机降低90%,CO降低80%。另外,稀燃也使裂解气发动机在保持原汽油机动力性的条件下,甲醇的当量燃料消耗率较汽油明显降低,降低幅度为14.3%～30.7%。在点火式电喷发动机上应用裂解气作燃料是实现甲醇高效清洁燃烧新方法。
침대경연료발동궤존재적문제급폐기여열적류실,제출이용폐기여열재선제취부경혼합기작위발동궤적연료。재일태점화식전분기유궤상,채용여열제경장치,재발동궤태가상,이용AVL Digas4000Light오기체폐기배방의진행료성능연구。결과표명：통과희박연소가현저개선NOx화CO배방,NOx교원기유궤강저90%,CO강저80%。령외,희연야사렬해기발동궤재보지원기유궤동력성적조건하,갑순적당량연료소모솔교기유명현강저,강저폭도위14.3%～30.7%。재점화식전분발동궤상응용렬해기작연료시실현갑순고효청길연소신방법。
For hydrogen fueled engine problems and exhaust gas heat loss, this paper presents a modified spark ignite （SI） electronic-controlled engine that used the hydrogen mixture as fuel which was generated from methanol dissociated by the exhaust heat. The performance and emission test on the engine was performed on the bench using AVL Digas 4000 Light emission analyzer. The results indicate that the engine fueled with dissociated methanol can operate for very lean mixture conditions because of its wide ignition limits. When the excess air ratio is 1.4, there is an order of magnitude reduction of NO and CO comparing to the baseline engine, with NOx reduced at 90%, and CO almost by zero emission levels, but with HC being equivalent to gasoline. Equivalent specific fuel consumption of methanol is also reduced by 14.3%-30.7 % compared with gasoline. Therefore, applying dissociated methanol to SI electronic-controlled engine is a new approach to clean and high efficiency combustion with methanol fuel.