甲醇裂解气对点燃式发动机性能影响研讨.pdfVIP

中国工程热物理学会学术会议论文 燃烧学 学术会议论文 编号： 084179 甲醇裂解气对点燃式发动机性能影响研究 1 姚春德 徐元利 杨建军 张勇 李旭聪 （天津大学内燃机燃烧学国家重点实验室 天津 300072） Tel: 022E-mail: arcdyao@tju.edu.cn, 摘要：以一台点火式电控发动机为研究对象，采用余热制氢装置，研究了甲醇裂解气对点火式发动机 性能的影响。研究表明：裂解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。 关键词：SI发动机 甲醇裂解气 稀薄燃烧 排放特性 燃料经济性 Effects of Dissociated Methanol on Performance of SI Engine YAO Chun-de, XU Yuan-li, YANG Jian-jun ，ZHANG Yong ，LI Xucun （State Key Laboratory of Engine, Tianjin University, Tianjin, 300072，China ） Key Words：SI electronic-controlled engine；Dissociated methanol ；Lean combustion ；Emission characteristic ；Fuel economy Abstract：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 the engine with dissociated methanol could run under lean mixture since high hydrogen in it 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 almost closes to zero emission level ），but its HC is equivalent to gasoline. Meanwhile ，the fuel economy is also improved with minor substitution of 1.48L methanol for 1L gasoline. Therefore ，applying dissociated methanol to SI electronic-controlled engine is a new approach to clean and high efficiency combustion with methanol fuel. 0 前言 受热并在催化剂作用下发生如下裂解反 由于甲醇的热值低，相比于汽油，运 应： 行中的消耗量大