Abstract
This paper reports the analysis of on-road emissions of a 2005 model-year petrol car. The concentrations of CO, HC and NOx were measured directly from the tailpipe while the car was driven in selected urban areas in Hong Kong. The fuel consumption and emissions were examined both macroscopically and microscopically. It was found that the fuel consumption and emission data were widely dispersed with vehicle speed due to the different on-road parameters which could affect the fuel consumption and emission level. The pollutant emissions were found to be lower than the Euro-4 standard. The fuel consumption and emissions were lower at higher driving speed. The pollutants emitted and fuel consumed during the idling mode formed a significant portion of the trip, except for NOx emission which was extremely low at idling. Microscopically, it was found that fuel consumption as well as pollutant emission decrease with the average driving speed of a driving segment or the instantaneous driving speed. Thus congestion leads to increased fuel consumption and pollutant emission, even for a low-emission car.
| Original language | English |
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| Title of host publication | Proceedings of the 13th International Conference of Hong Kong Society for Transportation Studies |
| Subtitle of host publication | Transportation and Management Science |
| Pages | 311-319 |
| Number of pages | 9 |
| Publication status | Published - 1 Dec 2008 |
| Event | 13th International Conference of Hong Kong Society for Transportation Studies: Transportation and Management Science - Kowloon, Hong Kong Duration: 13 Dec 2008 → 15 Dec 2008 |
Conference
| Conference | 13th International Conference of Hong Kong Society for Transportation Studies: Transportation and Management Science |
|---|---|
| Country/Territory | Hong Kong |
| City | Kowloon |
| Period | 13/12/08 → 15/12/08 |
ASJC Scopus subject areas
- Transportation
