摘要
为了改善非道路用涡轮增压直喷395E柴油机的排放性能,试验研究了供油提前角、喷油器喷孔直径和启喷压力、喷油器安装倾角等喷油系统参数及燃烧室几何形状对发动机NOx和PM排放的影响。试验结果表明:采用较小喷孔直径(0.23 mm)、较小供油提前角(8°CA)、径深比(2.857)和口径比(1.06)适中的缩口哑铃型燃烧室时,NOx、NOx+HC、CO和PM排放分别降低到6.30、7.05、0.90和0.233 g/(kW.h),达到了美国EPA第四阶段非道路用柴油机排放标准的要求。
The effects of fuel injection system parameters and combustion chamber geometry on emission of NOx and PM from a non-road turbocharged direct injection 395E diesel engine were experimentally studied in order to significantly reduce emission pollutants. The tested fuel injection system parameters included fuel supply advance angle, nozzle hole diameter, opening injection pressure and the inclined angle of injector installation. Experimental results show that with a smaller nozzle hole diameter （0.23 mm）, smaller fuel supply advance angle （8 °CA） and a necking-down dumbbell shape combustion chamber with mezzo diameter-deep ratio （2. 857） and necking-down rate （1.06）, NOx, NOx ＋HC, CO, PM emission of the tested diesel engine decrease to 6.30,7.05,0.90,0. 233 g/（kW·h） respectively, the optimizated 395E diesel engine can meet the emission limits of EPA Tier 4 exhaust emission standards for non-road diesel engine.
出处
《内燃机工程》
EI
CAS
CSCD
北大核心
2009年第5期27-30,35,共5页
Chinese Internal Combustion Engine Engineering
关键词
内燃机
非道路用柴油机
排放
燃烧室
供油提前角
IC engine
non-road diesel engine
emission
combustion chamber
fuel supply advance angle
