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中文摘要：
以一台点火式电控发动机为研究对象，利用气相色谱仪对裂解气的成分进行了在线检测，裂解气中除含有H2和CO外，还含有一定量的CH30H蒸汽，三者的含量分别为：23．3％-46％，11．6％-23％和31％-65％；对不同转速和负荷下的气缸压力进行了测量，并计算了其压力升高率和放热率，结果表明：裂解气发动机的最高燃烧压力和压力升高率及最大放热率与裂解率有关。对于裂解率低的工况，由于裂解气的放热较汽油慢，最高燃烧压力和压力升高率及最大放热率也较汽油低；而对于裂解率高的工况，由于裂解气中含氢量的增加，使裂解气的放热较汽油快，裂解气的最高燃烧压力和压力升高率均高于汽油。
英文摘要：
Based on a SI electronic-controlled engine, dissociated methanol components were detected online with gas chromatograph while operation. The results show that besides hydrogen and monoxide carbon, certain amount of methanol steam was found in dissociated methanol and they account for 23.3%-46%, 11.6%-23% and 31%-65%, respectively. In order to fully understand the combustion characteristics of dissociated methanol, the cylinder combustion pressure was measured and analyzed, related to which the pressure rising rate, maximum combustion temperature and maximum heat release rate. Those parameters above were calculated and the results show that they are all varied with the hydrogen concentration in the mixture from methanol dissociated.
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