Sub-23 nm Particulate Emissions from a Highly Boosted GDI Engine
Sub-23 nm Particulate Emissions from a Highly Boosted GDI Engine
复制标题
高增压 GDI 发动机的低于 23 nm 颗粒物排放
DOI：
10.4271/2019-24-0153
复制
发表时间：
2019
期刊：
影响因子：
--
通讯作者：
D. Richardson
中科院分区：
文献类型：
--
作者：
F. Leach;A. Lewis;S. Akehurst;J. Turner;D. Richardson
欧洲颗粒物测量计划(PMP)定义了欧洲车辆颗粒物数量(PN)排放的当前测量标准。这规定了在23 nm处的50%计数效率(D50)和在41 nm处的90%计数效率(D90)。汽油直喷(GDI)发动机的颗粒物排放已被广泛研究，但通常仅在PMP或类似采样程序的背景下进行。人们对车辆排放的最小颗粒物--即小于23纳米的颗粒物--越来越感兴趣。文献表明，通过将D50移动到10纳米，GDI发动机的PN排放可能会增加35%到50%，但仍然存在很大的不确定性。在这项工作中，使用两种过滤方法对UltraBoost引擎的现有数据集进行了评估，其中一种方法在10 nm处具有50%的计数效率(D50)，在23 nm处具有90%的计数效率(D90)(过滤器1)，另一种方法在10 nm处具有D50，在15 nm处具有D90(过滤器2)，并将结果与PMP等效过滤进行比较。分析了与高增压发动机相关的排气背压、废气再循环、火花和喷油正时等发动机参数的影响，以及燃料组成的影响。结果表明，在两种不同的计数效率下，滤清器1和滤清器2的Pn排放分别平均增加36%和45%。
The European Particle Measurement Program (PMP) defines the current standard for measurement of Particle Number (PN) emissions from vehicles in Europe. This specifies a 50% count efficiency (D 50 ) at 23 nm and a 90% count efficiency (D 90 ) at 41 nm. Particulate emissions from Gasoline Direct Injection (GDI) engines have been widely studied, but usually only in the context of PMP or similar sampling procedures. There is increasing interest in the smallest particles – i.e. smaller than 23 nm – which can be emitted from vehicles. The literature suggest that by moving D 50 to 10 nm, PN emissions from GDI engines might increase by between 35 and 50% but there remains a lot of uncertainty. In this work, an existing data set from the Ultraboost engine – a highly boosted engine running at up to 32 bar BMEP – has been evaluated using two filtering methodologies, one with a 50% count efficiency (D 50 ) at 10 nm and a 90% count efficiency (D 90 ) at 23 nm (Filter 1) and the other with a D 50 at 10 nm and a D 90 at 15 nm (Filter 2) and the results have been compared to PMP equivalent filtering. The effect of engine parameters relevant to highly boosted engines such as exhaust back pressure, EGR, spark and injection timing is analysed, as well as the effect of fuel composition. The results show that an increase in PN emissions of 36% with Filter 1 and 45% with Filter 2 is on average observed with the two different count efficiencies with the baseline fuel.
影响因子：
7.4
作者：
F. Leach;R. Stone;D. Richardson;J. Turner;A. Lewis;S. Akehurst;S. Remmert;S. Campbell;R. Cracknell
通讯作者：
F. Leach;R. Stone;D. Richardson;J. Turner;A. Lewis;S. Akehurst;S. Remmert;S. Campbell;R. Cracknell