Real-world gaseous emission characteristics of Euro 6b light-duty gasoline- and diesel-fueled vehicles. (January 2020)

• Record Type: Journal Article
• Authors: Yang, Zhiwen; Liu, Yao; Wu, Lin; Martinet, Simon; Zhang, Yi; Andre, Michel; Mao, Hongjun
• Is Part Of: Transportation research. Volume 78(2020)
• Publication Date: 2020-01
• Subjects: Light-duty passenger vehicle -- PEMS -- Vehicle emissions -- Cold-start; Transportation -- Research -- Periodicals; Transportation -- Environmental aspects -- Periodicals; 354.76
• DOI: 10.1016/j.trd.2019.102215
• Languages: English
• ISSNs: 1361-9209

Abstract

Highlights: Euro 6b light-duty passenger vehicles were investigated by a PEMS in Lyon, France. WLTC can still not enough to represent real-world driving characteristics. NOx and CO2 emission controls remain critical to address Euro 6b vehicle emissions. Acceleration at high speeds causes more emissions for gasoline- than diesel-vehicle. Warm/cold-start leads to more CO and THC emissions for gasoline- than diesel-vehicle. Abstract: To accurately investigate vehicle emissions that have become major contributors to global air pollutants and greenhouse gases, test conditions have been transferred from laboratory type approval test cycles to real-world driving conditions. In this study, the real-world driving emissions of carbon monoxide (CO), total hydrocarbons (THC), nitrogen oxides (NOx ), and carbon dioxide (CO2 ) from one gasoline and two diesel Euro 6b light-duty passenger vehicles were investigated by a portable emission measurement system (PEMS) in Lyon, France. NOx and CO2 emission controls remain critical to addressing the real-world driving emissions of Euro 6b vehicles. Notably, the tested gasoline vehicle emitted higher CO2 emissions than diesel vehicles on all types of roads, especially on the urban road with an excess of 29.3–48.3%. The highest emission factors of gaseous pollutants generally occurred on the motorway for the gasoline vehicle, while on the urban road for diesel vehicles. In particular, for high-speed driving conditions, the gasoline vehicle gaseous emissions, especially NOx emissions, were more affected by acceleration than diesel vehicle emissions. In addition, the CO emissions, especially THC emissions, for the gasoline vehicle, were more influenced by warm-start, especially cold-start, than those for diesel vehicles.