喷射时刻对柴油和汽油/柴油混合燃料低温燃烧的影响  

Effect of Injection Timing on Low Temperature Combustion Fuelled by Diesel and a Blend of Diesel and Gasoline

作　　者：韩东[1,2] 吕兴才[1] 黄震[1] DENNIS Assanis 

机构地区：[1]上海交通大学动力机械与工程教育部重点实验室,上海200240 [2]密西根大学机械工程系

出　　处：《内燃机学报》2011年第3期200-205,共6页Transactions of Csice

基　　金：国家重点基础研究发展计划资助项目(2007CB210007)

摘　　要：使用纯柴油和一种汽油/柴油混合燃料在一台单缸柴油机上进行低温燃烧试验.通过调节燃油喷射时刻,研究了不同燃料的燃烧与排放性能.结果表明,这两种燃料的低温燃烧具有两阶段放热.在固定燃油喷射时刻的情况下,两种燃料具有类似的低温放热开始时刻,然而汽油/柴油混合燃料的高温放热开始时刻要迟于纯柴油燃料.主燃烧阶段的各个燃烧相位是线性相关的,燃料种类对主燃烧阶段的燃烧相位的影响不大.汽油/柴油混合燃料具有改善NOx和颗粒物(PM)排放的潜力,然而其燃烧循环变动性增加.Pure diesel and a blend of diesel and gasoline are employed in the low temperature combustion mode with injection timing as an adjustable parameter.Results show that these two fuels possess a two-stage combustion process.For a given fuel injection timing,two test fuels produce similar start of low temperature heat release,while the start of high temperature heat release of diesel/gasoline blend is later than that of pure diesel fuel.The main combustion phases are linearly correlated,regardless of the fuel types.Diesel/gasoline blend has the potential to improve NOx and PM emissions but leads to increased combustion instability.

关 键 词：柴油机 汽油 喷射时刻 低温燃烧 

分 类 号：TK421[动力工程及工程热物理—动力机械及工程]