Influence of Driving Cycles on Euro-3 Scooter Emission Levels

This study derives from the need to evaluate the impact on the urban air quality of two-wheeler vehicular class. Mopeds and motorcycles, in fact, are increasingly used in recent years, representing a great share of motor-powered vehicles in urban environment. This paper is finalized at the examination of the emissions of the last generation motorcycles, contributing broadly to extend knowledge of twowheeler emission behavior, with reference to cold and hot operating conditions. For this aim, an experimental investigation was performed on a medium-size motorcycle belonging to the Euro-3 statutory category, evaluating the exhaust emissions of regulated pollutants. This scooter was tested on a dynamometer bench both on a type approval test cycle and on real-world test cycles in order to study the influence of driving cycles on the emission levels. The statistical processing results of the experimental data were compared with recent emission models for estimating emissions from road traffic.