摘要
设计了重型电控共轨柴油机高海拔(低气压)模拟试验系统,利用其开展了基于冷却液温度的柴油机不同海拔燃烧过程试验研究,分析了在不同海拔下冷却液温度对柴油机燃烧过程参数的影响。结果表明:同一冷却液温度下,随着海拔的升高,放热率峰值、缸内最高燃烧压力以及平均指示压力均下降,而缸内最高燃烧温度增加。海拔每升高1km,放热率峰值、缸内最高燃烧压力以及平均指示压力分别平均下降了10.1%、3.76%以及3.42%,缸内最高燃烧温度平均增加了4.31%。同一海拔下,随着冷却液温度的升高,放热率峰值下降,而缸内最高燃烧温度、最高燃烧压力以及平均指示压力均增加。冷却液温度每升高10℃,放热率峰值平均下降了5.62%,缸内最高燃烧温度、最高燃烧压力以及平均指示压力分别平均增加了5.38%、1.01%以及1.28%。
An experimental research of diesel engine combustion process based on coolant temperature at different altitudes was carried out via self-designed high altitude（low air pressure）simulation experimental system of heavy-duty common-rail diesel engine, and the effects of coolant temperature on the diesel engine combustion process parameters at different altitudes were analyzed. Results show that under the same coolant temperature, with the rises of altitude, the maximum of heat release rate, combustion pressure in cylinder and average indicated pressure decrease, while the maximum of combustion temperature in cylinder increases. With the altitude rising every 1 km, the maximum of heat release rate, combustion pressure in cylinder and average indicated pressure decrease 10.1%, 3.76% and 3.42% respectively on average, the maximum of combustion temperature in cylinder increases 4.31% on average. Under the same altitude, with the rises of coolant temperature, the maximum of heat release rate decreases, while the maximum of combustion temperature and pressure in cylinder as well as the average indicated pressure increase. With the coolant temperature rising every 10℃, the maximum of heat release rate decreases5.62% on average, the maximum of combustion temperature and pressure in cylinder as well as average indicated pressure increase 5.38%, 1.01% and 1.28% respectively on average.
出处
《小型内燃机与车辆技术》
2016年第1期5-9,共5页
Small Internal Combustion Engine and Vehicle Technique
关键词
冷却液温度
重型电控共轨柴油机
不同海拔
燃烧过程参数
Coolant temperature
Heavy-duty common-rail diesel engine
Different altitudes
Combustion process parameters
