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中文摘要：
以一台点火式电控发动机为研究对象，采用废气余热制氢装置，研究了甲醇裂解气对点火式发动机性能的影响。研究表明：裂懈气的稀燃范围十分宽泛，可实现稀薄燃烧；通过稀燃可使NOx排放较原汽油机降低90％，CO几乎接近零排放，而HC排放接近汽油。同时，稀燃也使裂解气发动机在保持原汽油机动力性的条件下，获得了较好的燃料经济性，容积替换比最小可以达到了1．48。该方法为实现甲醇高效清洁燃烧提供了切实可行的技术方案。
英文摘要：
Based on a SI electronic-controlled engine, using a methanol reformer by exhaust heat, a study on the effect of dissociated methanol on engine performance was performed. The testing results indicate ： that the engine runs lean mixture from dissociated methanol to realize lean combustion since dissociated methanol with high hydrogen can extend the ignition limits. Lean operation （λ 〉 1.4）can provide an order of magnitude reduction of NOx and CO based on the baseline engine（NOx is reduced by ninety percent, and CO ahnost closes to zero emission level）, but its HC is equivalent to gasoline. Meanwhile, the fuel economy is also improved with minor substitution of 1.48 L methanol for 1 L 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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