废气再循环阀开度对柴油机排放特性的影响
Influence of Exhaust Gas Recirculation Valve Opening on Diesel Engine Emission Characteristics
废气再循环（EGR）系统是降低柴油机NOx 排放的重要手段，但会对其他污染物排放带来不同程度的影响。本文基于发动机台架在一台高压共轨重型柴油机上进行EGR 与可变截面涡轮增压（VGT）稳态正交试验，探究了稳态工况下EGR 阀开度对柴油机NOx、CO、CO2 和碳烟等污染物的影响。研究结果表明，NOx 排放随EGR 阀开度升高呈下降的趋势，当EGR 阀开度超过50%时，NOx 排放降幅变缓。柴油机CO 排放随EGR 阀开度的升高呈上升趋势，这一趋势…查看全部>>
Exhaust Gas Recirculation (EGR) system is an important means to reduce the NOx emission of diesel engine, but it will have different degrees of impact on the emission of other pollutants. Based on the engine bench, the steady-state orthogonal tests of EGR and variable geometry turbocharger (VGT) were carried out on a high-pressure common rail heavy-duty diesel engine, and the influence of EGR valve opening on diesel engine NOx, CO, CO2, soot, and other pollu…查看全部>>
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