School of Environmental Science and Technology, Hanoi University of Science and Technology, 1 Dai Co Viet, Hanoi, Vietnam.
Faculty of Transport Safety and Environment, University of Transport and Communications, 3 Cau Giay, Hanoi, Vietnam.
Environ Sci Pollut Res Int. 2019 Aug;26(23):24176-24189. doi: 10.1007/s11356-019-05634-9. Epub 2019 Jun 21.
This paper develops the specific emission factors for buses in the real-world traffic conditions in the inner city of Hanoi, Vietnam. An engine stationary cycle consisting of 14 modes was developed based on the typical driving cycle of Hanoi buses which had been constructed with the application of Markov chain theory. This is the first engine stationary emissions test cycle constructed for heavy-duty engine in Vietnam. Based on this cycle, the country-specific emission factors (CSEFs) of air pollutants including CO, HC, NO, CO, and PM for buses in Hanoi have been developed using the emission measurements on the engine test bed. It is found that almost all developed emission factors are higher than those derived from the emission measurements to the ECE R49 on the same engine. These emission factors, therefore, can be used to improve the quality of the emission inventory of buses in Hanoi.
本文为在越南河内市中心实际交通条件下的公交车开发了特定的排放因子。基于已应用马尔可夫链理论构建的河内公交车典型行驶循环，开发了由 14 种模式组成的发动机定置循环。这是越南第一个为重型发动机构建的发动机定置排放测试循环。在此循环的基础上，使用发动机试验台的排放测量值，开发了包括河内公交车的 CO、HC、NO、CO 和 PM 在内的空气污染物的国家特定排放因子（CSEFs）。结果发现，几乎所有开发的排放因子都高于在同一发动机上对 ECE R49 排放测量的结果。因此，这些排放因子可用于提高河内公交车排放清单的质量。
