| Autor: |
Chao Ma, Lin Wu, Hong-jun Mao, Xiao-zhen Fang, Ning Wei, Jin-sheng Zhang, Zhi-wen Yang, Yan-jie Zhang, Zong-yan Lv, Lei Yang |
| Jazyk: |
angličtina |
| Rok vydání: |
2020 |
| Předmět: |
|
| Zdroj: |
Atmosphere, Vol 11, Iss 1, p 64 (2020) |
| Druh dokumentu: |
article |
| ISSN: |
2073-4433 |
| DOI: |
10.3390/atmos11010064 |
| Popis: |
Previous works on real-world vehicle emission characteristics have mainly focused on the influences of fuel, speed, vehicle type, elevation, and other factors on vehicle emission quantity and components. However, few studies have investigated the transient trend of automotive exhaust emissions through on-road measurements. The key objective of the present paper was to examine the transient characteristics of exhaust emissions from different vehicle types on the roads of Tianjin. To achieve the goal, a portable emission measurement system (PEMS) was employed to monitor emissions from selected test vehicles—private cars, passenger vehicles, and cargo vehicles. It was found that the high-emission points of test vehicles were mainly distributed in two regions: the high-speed region (speed > 70−90 km/h, vehicle-specific power (VSP) > 0 kW/t) and the medium-speed−acceleration region (20−30 km/h < speed < 60−90 km/h, 0 kW/t |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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