EGR对非标柴油/二甲醚混合燃料发动机性能与排放的影响  

The Influence of EGR Rate on Non-standard Diesel/DME Blended Fuel Engine Performance and Emission

作　　者：雷思敏[1] 王铁[1] 冯丹华[1] 刘伟伟[1] 李玉娟[1] 

机构地区：[1]太原理工大学车辆工程系,山西太原030024

出　　处：《小型内燃机与摩托车》2012年第3期40-43,78,共5页Small Internal Combustion Engine and Motorcycle

摘　　要：开展了增压柴油机燃用D50非标柴油/二甲醚混合燃料时采用EGR技术对发动机动力性、燃烧和排放性能影响的试验研究。试验结果表明:EGR技术可以有效降低混合燃料发动机的NOx排放。随着EGR率的增加,NOx排放改善明显;对动力性的影响相对复杂:中低负荷下,燃烧室内氧浓度较大,对燃烧和排放性能影响较小;高负荷时,废气引入导致燃烧室局部缺氧严重,烟度、HC和CO排放恶化。The influence of EGR technology on power performance, combustion performance and emission per- formance was studied by experiment based on the turbocharged DME Blended Fuel. The results show that the EGR technology engine fueled with D50 Non-standard DieseL/ can reduce the Nox emission effectively. For the same speed and operating conditions, Nox emissions has improved significantly with the increase of EGR rate ; the influence on power performance is relatively complex. Under the low load operating mode, the influ- ence on combustion performance and emission performance are relatively small because of higher oxygen con- centration in the combustion chamber. But under high load, exhaust gas entering into the combustion chamber has led to severe local hypoxia, and smoke, HC and CO emissions deterioration.

关 键 词：非标柴油 二甲醚 EGR 性能影响 

分 类 号：TK421.5[动力工程及工程热物理—动力机械及工程]