Transient Characterization of Automotive Exhaust Emission from Different Vehicle Types Based on On-Road Measurements
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 throu...
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| Format: | Article |
| Language: | English |
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MDPI AG
2020-01-01
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| Series: | Atmosphere |
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| Online Access: | https://www.mdpi.com/2073-4433/11/1/64 |
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| author | 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 |
| author_facet | 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 |
| author_sort | Chao Ma |
| collection | DOAJ |
| description | 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 <VSP < 12 kW/t). The CO, hydrocarbon (HC), NOx, and particulate number (PN) average emission rates in the high-emission points could be 3.15−14.93 times, 1.93−24.89 times, 3.23−6.03 times, and 3.22−30.27 times of those of average emission rates. The HC, NOx, and PN average emission rates of China IV vehicles in the high-emission points were 2.46−4.92 times, 3.56−6.03 times, and 3.22−13.21 times of those of average emission rates, not less than those of China III (1.93−2.52 times, 2.75−3.90 times, and 9.98−22.34 times). Test vehicles mainly emitted nucleation-mode and Aitken-mode particles, and the increase of the PN concentration emission rate in low-speed and high-speed regions was higher than that in the medium-speed region. The exhaust gas recirculation (EGR) + diesel particulate filter (DPF) could effectively inhibit the Aitken output caused by turbocharged intercooler (CIC). The selective catalytic reduction (SCR) might cause more nucleation-mode particles. |
| first_indexed | 2024-12-21T19:03:22Z |
| format | Article |
| id | doaj.art-f083a63344fd41479019355908be51d3 |
| institution | Directory Open Access Journal |
| issn | 2073-4433 |
| language | English |
| last_indexed | 2024-12-21T19:03:22Z |
| publishDate | 2020-01-01 |
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| series | Atmosphere |
| spelling | doaj.art-f083a63344fd41479019355908be51d32022-12-21T18:53:25ZengMDPI AGAtmosphere2073-44332020-01-011116410.3390/atmos11010064atmos11010064Transient Characterization of Automotive Exhaust Emission from Different Vehicle Types Based on On-Road MeasurementsChao Ma0Lin Wu1Hong-jun Mao2Xiao-zhen Fang3Ning Wei4Jin-sheng Zhang5Zhi-wen Yang6Yan-jie Zhang7Zong-yan Lv8Lei Yang9Center for Urban Transport Emission Research, College of Environmental Science and Engineering, Nankai University, Tianjin 300071, ChinaCenter for Urban Transport Emission Research, College of Environmental Science and Engineering, Nankai University, Tianjin 300071, ChinaCenter for Urban Transport Emission Research, College of Environmental Science and Engineering, Nankai University, Tianjin 300071, ChinaCenter for Urban Transport Emission Research, College of Environmental Science and Engineering, Nankai University, Tianjin 300071, ChinaCenter for Urban Transport Emission Research, College of Environmental Science and Engineering, Nankai University, Tianjin 300071, ChinaCenter for Urban Transport Emission Research, College of Environmental Science and Engineering, Nankai University, Tianjin 300071, ChinaCenter for Urban Transport Emission Research, College of Environmental Science and Engineering, Nankai University, Tianjin 300071, ChinaCenter for Urban Transport Emission Research, College of Environmental Science and Engineering, Nankai University, Tianjin 300071, ChinaCenter for Urban Transport Emission Research, College of Environmental Science and Engineering, Nankai University, Tianjin 300071, ChinaCenter for Urban Transport Emission Research, College of Environmental Science and Engineering, Nankai University, Tianjin 300071, ChinaPrevious 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 <VSP < 12 kW/t). The CO, hydrocarbon (HC), NOx, and particulate number (PN) average emission rates in the high-emission points could be 3.15−14.93 times, 1.93−24.89 times, 3.23−6.03 times, and 3.22−30.27 times of those of average emission rates. The HC, NOx, and PN average emission rates of China IV vehicles in the high-emission points were 2.46−4.92 times, 3.56−6.03 times, and 3.22−13.21 times of those of average emission rates, not less than those of China III (1.93−2.52 times, 2.75−3.90 times, and 9.98−22.34 times). Test vehicles mainly emitted nucleation-mode and Aitken-mode particles, and the increase of the PN concentration emission rate in low-speed and high-speed regions was higher than that in the medium-speed region. The exhaust gas recirculation (EGR) + diesel particulate filter (DPF) could effectively inhibit the Aitken output caused by turbocharged intercooler (CIC). The selective catalytic reduction (SCR) might cause more nucleation-mode particles.https://www.mdpi.com/2073-4433/11/1/64vehicle exhaust emissionportable emission measurement system (pems)emission factortransient emission characteristicsparticulate number concentration |
| spellingShingle | 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 Transient Characterization of Automotive Exhaust Emission from Different Vehicle Types Based on On-Road Measurements Atmosphere vehicle exhaust emission portable emission measurement system (pems) emission factor transient emission characteristics particulate number concentration |
| title | Transient Characterization of Automotive Exhaust Emission from Different Vehicle Types Based on On-Road Measurements |
| title_full | Transient Characterization of Automotive Exhaust Emission from Different Vehicle Types Based on On-Road Measurements |
| title_fullStr | Transient Characterization of Automotive Exhaust Emission from Different Vehicle Types Based on On-Road Measurements |
| title_full_unstemmed | Transient Characterization of Automotive Exhaust Emission from Different Vehicle Types Based on On-Road Measurements |
| title_short | Transient Characterization of Automotive Exhaust Emission from Different Vehicle Types Based on On-Road Measurements |
| title_sort | transient characterization of automotive exhaust emission from different vehicle types based on on road measurements |
| topic | vehicle exhaust emission portable emission measurement system (pems) emission factor transient emission characteristics particulate number concentration |
| url | https://www.mdpi.com/2073-4433/11/1/64 |
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