| DOC+CDPF对重型柴油车排放特性的影响 |
| 摘要点击 1740 全文点击 753 投稿时间：2016-10-25 修订日期：2016-12-02 |
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| 中文关键词 转毂 重型柴油车 催化型连续再生颗粒捕集器 气态物 颗粒物 |
| 英文关键词 revolving drum test bench heavy-duty diesel vehicle DOC+CDPF gaseous emissions particulate emissions |
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| 中文摘要 |
| 基于重型转毂试验平台对比研究国Ⅲ重型柴油车加装催化型连续再生颗粒捕集器（DOC+CDPF）前后的气态物及颗粒物排放性能，结果表明从市区循环、公路循环到高速循环，原车的CO、THC、CO2及颗粒质量（PM）排放因子依次减小，NOx及颗粒数量（PN）排放因子依次增大，颗粒数量浓度随粒径呈双峰分布并且以聚集态颗粒排放为主；加装DOC+CDPF后，各污染物排放因子均有所下降，且下降趋势从市区循环、公路循环到高速循环依次增大，从整个C-WTVC循环来看，CO排放因子下降70.36%，THC排放因子下降72.73%，CO2排放因子下降17.00%，NOx排放因子下降7.76%，PM、PN排放因子分别下降93.77%和98.91%，颗粒数量浓度随粒径仍呈双峰分布，但排放以核模态颗粒为主，并且聚集态峰值对应粒径减小. |
| 英文摘要 |
| Based on the revolving drum test bench, an experimental study was conducted in heavy-duty diesel vehicle at China Stage Ⅲ with and without DOC+CDPF to investigate the effects of DOC+CDPF on the gaseous and particle emission characteristics under C-WTVC driving cycle. The results showed that from city circulation conditions to high way circulation conditions to high-speed circulation conditions, the CO, THC, CO2 and PM emission factors of the test vehicle without DOC+CDPF decreased while NOx and PN emission factors increased, the particle number concentration showed two peaks versus the size of the particles and accumulated particles predominated. After the test vehicle was equipped with DOC+CDPF, the emissions factors decreased and the faster the circulation speed, the greater the decreasing amplitudes of the emissions factors. Throughout the C-WTVC, the decreasing amplitudes of CO, THC, CO2, and NOx emission factors were 70.36%, 72.73%, 17.00% and 7.76%, the PM and PN emission factors decreased by 93.77% and 98.91% respectively. The particle number concentration still had two peaks versus the size of the particles and the nuclear mode particles predominated. Besides, the size of the accumulated particles peak diminished. |
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