模拟高原环境下柴油添加剂及含氧组分对发动机性能的影响  

THE EFFECTS OF DIESEL ADDITIVES AND OXYGEN-CONTAINING COMPONENT ON ENGINE PERFORMANCE IN SIMULATED PLATEAU ENVIRONMENT

作　　者：丁晓亮 林磊 杨鹤 卢文彤 蔺建民 夏鑫 Ding Xiaoliang;Lin Lei;Yang He;Lu Wentong;Lin Jianmin;Xia Xin(SINOPEC Research Institute of Petroleum Processing Co.,Ltd.,Beijing 100083)

机构地区：[1]中石化石油化工科学研究院有限公司,北京100083

出　　处：《石油炼制与化工》2024年第12期119-126,共8页Petroleum Processing and Petrochemicals

基　　金：中国石化股份有限公司合同项目(121031)。

摘　　要：通过调整进气压力来模拟不同海拔高度的高原环境,在单缸柴油机上考察了柴油中添加硝酸异辛酯(EHN)和聚氧甲基二甲醚(DMMn)对发动机性能的影响,深入比较和分析了海拔高度、EHN、DMMn及二者复配使用对发动机动力性、燃油经济性以及燃烧特性的影响。结果表明:高原环境下,随着海拔高度的增加,过量空气系数下降,排气温度升高,缸内燃烧压力降低,导致发动机输出功率下降和燃油经济性恶化。添加DMMn能够有效提高过量空气系数,降低排气温度、减小热负荷,提升热效率和燃油能量利用率;EHN和DMMn复配使用,能够进一步降低排气温度,同时提升热效率。通过油量补偿,在相同排气温度条件下,能够有效恢复发动机的功率输出,不同海拔下较基准油平均提高约1.45%。The effects of the addition of ethylhexyl nitrate(EHN)and polyoxyethylene dimethyl ether(DMMn)on the performance of a single cylinder diesel engine were investigated by adjusting the intake pressure to simulate the plateau environment at different altitude.The effects of altitude,EHN,DMMN and their combination on engine output power,fuel economy and combustion characteristics were compared and analyzed.The results showed that with the increase of altitude,the excess air coefficient decreased,which led to the increase of exhaust temperature,the decrease of maximum output power and the deterioration of fuel economy due to the decrease of combustion pressure in the cylinder.The addition of DMMn could effectively increase the excess air coefficient,thereby reducing the exhaust temperature,reducing the heat load of the engine,and also improving the thermal efficiency and fuel energy utilization.The combination of EHN and DMMn could further reduce the exhaust temperature and improve the thermal efficiency.Through fuel quantity compensation,the output power of the engine could be effectively recovered at the same exhaust temperature,which was about 1.45%higher than the reference fuel at different altitudes.

关 键 词：柴油机 高原 含氧组分 添加剂 

分 类 号：TE624.81[石油与天然气工程—油气加工工程]