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%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.
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