不同比例润滑添加剂对车用二甲醚发动机性能的影响  

Effects of Different Proportions of Lubricant Additives on Performance of Vehicle DME Engine

作　　者：汪映[1] 何利[1] 郭振祥[1] 周龙保[1] 杨中乐[1] 

机构地区：[1]西安交通大学能源与动力工程学院,西安710049

出　　处：《内燃机工程》2009年第3期23-26,共4页Chinese Internal Combustion Engine Engineering

基　　金：高等学校博士学科点专项科研基金(新教师基金:20070698030);西安交通大学研究生创新专项基金(2007)

摘　　要：采用不同比例R100润滑添加剂对二甲醚发动机进行了性能影响的试验研究。结果表明:二甲醚与R100可互溶,二甲醚中加入一定量的R100润滑添加剂后,油泵柱塞和出油阀表面的磨损情况有较明显改善,发动机可在宽广的转速和负荷范围内稳定运行。随着燃料中R100润滑添加剂含量的增加,二甲醚发动机的动力性和有效热效率略有提高,但NOx排放逐渐恶化。R100润滑添加剂含量低于一定比例时,二甲醚发动机仍可实现无烟燃烧,但超过一定比例时产生碳烟,且随着R100润滑添加剂加入比例的增大碳烟排放逐渐增多。The effects of different proportions of R100 lubricant additive on DME engine performance were investigated. Results show that wear rates of plunger and delivery valve can be improved and DME engine can operate steadily over a broad range of speed and power through adding certain R100 lubricant additives in DME fuel. With the increase of R100 lubricant additive mass fraction in DME fuel, power output and brake thermal efficiency of DME engine will be increased, but NOx emissions will increase. Smokeless combustion can still be realized with less than a certain proportion of R100 lubricant additive in a DME engine. Above that proportion of lubricant additive, smoke emission will occur and become more and more severe with increase of R100 lubricant additive proportion.

关 键 词：内燃机 二甲醚 润滑 添加剂 发动机 

分 类 号：TK464[动力工程及工程热物理—动力机械及工程]