Impact of Efficient Driving in Professional Bus Fleets (original) (raw)
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2011
CO2 emissions of new passenger cars (PCs) registered in Europe are monitored in order to meet the objectives of Regulation EC 443/2009. This calls for an average CO2 emission of 130 g/km for new PCs registered in Europe to be met by vehicle measures in 2015. This decreases to 95 g/km in 2020. Similar regulations are gradually promoted for other vehicle categories as well, more prominently for light commercial vehicles (LCVs). CO2 emissions of new vehicle types are determined during the vehicle type-approval by testing over the New European Driving Cycle (NEDC). Worries have been expressed that this driving cycle is not representative of real-world driving conditions. It is considered that fuel consumption, and hence CO2 emissions (and air pollutant emissions), measured over this cycle under-represent reality. This report uses real-world information to compare in-use fuel consumption of PCs with type-approval CO2. The main objective was to develop functions that may enable prediction...
Assesment of real driving emissions of a bus operating on a dedicated route
Thermal Science, 2018
The reducing of real driving emissions from public transportation which is using intracity lines has become more important in recent years. This is because the petroleum derived fuel combustion products contributes the global warming as well as adversely the air quality. The fuel consumption perspective is another major economical concern for operating companies that should be optimized. In this context a part of Istanbul Metrobus public transportation system of which is using fully a dedicated line is assessed via on board emission and fuel metering devices for two loading conditions. The relevant vehicle and engine operating data is logged during the tests. The logged data is post processed for developing the average emission factors. The results are also analyzed from acceleration and altitude change perspective and alternative scenarios are discussed for cleaner and economic operation. Lastly the in-service conformity parameters are identified and the results are compared with h...
Driving style and traffic measures-influence on vehicle emissions and fuel consumption
Proceedings of the Institution of Mechanical Engineers, Part D: Journal of Automobile Engineering, 2004
This paper describes the influence on vehicle emissions and energy consumption of different vehicle parameters and driving style as well as of traffic measures taken in order to increase transport safety or to reduce traffic jams. This should allow the Flemish Regional Government to perform more realistic modelling of the impact of transport on air pollution. The methodology is based on on-road measurements, roll-bench emission tests, vehicle simulations and regional emission modelling (for the Flemish Region, which encompasses the northern part of Belgium and is one of three entities that constitute the Federal Kingdom of Belgium). A vehicle simulation programme (VSP) has assisted in the assessment of the individual vehicle parameters (weight, gear shifts, tyre pressure, etc.). Different drive styles (sportive, EcoDriving, etc.) were measured on-road and evaluated on a roll-bench. Typical speed profiles corresponding to different traffic measures such as roundabouts, phased traffic...