DME/LPG燃料比例实时优化的HCCI燃烧控制新方法  

New Control Method for HCCI Combustion by Optimizing DME/LPG Fuel Blending Proportion

作　　者：黄震[1] 李德钢[1] 乔信起[1] 张武高[1] 

机构地区：[1]上海交通大学机械与动力工程学院,上海200030

出　　处：《内燃机学报》2006年第4期289-294,共6页Transactions of Csice

基　　金：国家重点基础研究发展规划资助项目(2001CB209208);上海市重大基础研究项目(05DJ14002)

摘　　要：根据燃料设计的思想,提出了混合燃料比例实时优化的HCCI燃烧控制新方法。在一台2135柴油机上,通过燃料成分设计(DME/LPG混合燃料)、混合气成分设计(进气添加二氧化碳)、发动机参数调整(改变压缩比)等多种模式对二甲醚HCCI燃烧进行了研究和比较。试验结果表明,在不同工况下实时进行DME/ LPG比例优化,通过改变燃料的理化特性和可燃混合气的成分,实现了HCCI着火与燃烧的有效控制,能够显著拓展二甲醚HCCI燃烧的运行负荷范围,并且各个工况下热效率最高、HC和CO排放最低。From view of fuel design theory, this paper proposes a new method by proportion optimization of fuel blending in site for HCCI combustion. In a 2135 diesel engine, experimental studies and comparrsons on DME/LPG HCCI combustion using fuel design concept with blend fuels, simulated EGR （adding CO2 in the intake charge）, and variation of engine parameters including variable compression ratio and engine speed. The proportion between DME and LPG was optimized in site under different engine loads. As result, by means of fuel properties design, the ignition and combustion phase of the HCCI can be well controlled along with the extension of engine output range, the improvement in brake thermal efficiency, and reduction in HC, CO emissions.

关 键 词：二甲醚 液化石油气 HCCI燃烧 混合燃料比例实时优化 

分 类 号：TK401[动力工程及工程热物理—动力机械及工程] O657.3[理学—分析化学]