Crankcase gaseous and particle emissions in common rail diesel engine
Crankcase gaseous and particle emissions in common rail diesel engine
复制标题
共轨柴油机曲轴箱气体和颗粒排放
DOI：
10.1177/1468087414563585
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发表时间：
2016
影响因子：
2.5
通讯作者：
X. Qiao
中科院分区：
文献类型：
--
作者：
Jinlong Bai;X. Qiao
在这项研究中，曲轴箱气体的温度，流量，气体排放（NOx，CO和HC）和颗粒排放（颗粒尺寸分布，数量和质量浓度，几何平均直径）相比，排气管在轻型共轨柴油机进行了研究。结果表明，曲轴箱排放主要受缸内压力第二峰值的影响。曲轴箱气体温度在52 °C和68 °C之间变化，曲轴箱气体流速随负载和速度略微增加，但随喷射正时变化不大。曲轴箱的CO排放量约为排气管的2%-5%，NOx排放量仅为1%左右，HC排放量超过10%。窜气百分比为10−8阶，并随着发动机负荷的增加和发动机转速的提高而降低。窜气HC排放百分比从5%到35%不等。随着发动机负荷的增加和转速的降低，曲轴箱中的核态微粒减少，聚集态微粒增加。颗粒总数浓度随负荷的增大而增大，随转速和喷油提前角的增大而减小。总质量浓度随负荷的增大而增大，随转速和喷油正时的增大而增大，随喷油正时的增大而福尔斯。基于质量的曲轴箱颗粒几何平均直径几乎是排气管颗粒几何平均直径的两倍，而基于数量的曲轴箱颗粒几何平均直径除了较高的负荷之外几乎没有差异。
In this study, the crankcase gas temperature, flow rate, gaseous emissions (NOx, CO and HC) and particle emissions (particle size distribution, number and mass concentration, geometric mean diameter) compared with tailpipe are investigated in a light-duty common rail diesel engine. It is shown that the emissions from the crankcase are mainly affected by the second in-cylinder pressure peak. The crankcase gas temperature varies between 52 °C and 68 °C, and the crankcase gas flow rate slightly increases with load and speed but does not vary much with injection timing. The CO emission from crankcase is about 2%−5% of that from tailpipe, the NOx emissions are only about 1% and the HC emissions are more than 10%. The blow-by gas percentage is 10−8 order and reduces with heavier engine load and faster engine speed. The blow-by HC emission percentage varies from 5% to 35%. As engine load is increased and engine speed is decreased, the nuclei mode particles of crankcase reduce and the accumulation mode particles increase. Furthermore, the particle total number concentration increases with load but decreases with speed and retarding injection timing. The total mass concentration increases with load but rises and falls with speed and injection timing. The crankcase particle geometric mean diameter based on mass is nearly twice larger than that of tailpipe, while the ones based on number are rarely different except the higher load.
使用特定有机物对曲轴箱和柴油机颗粒物废气排放进行详细表征和概况。
影响因子：
11.4
作者：
Zielinska,Barbara;Campbell,David;Lawson,DouglasR;Ireson,RobertG;Weaver,ChristopherS;Hesterberg,ThomasW;Larson,Timothy;Davey,Mark;Liu,LJSally
通讯作者：
Liu,LJSally