Ultrafine particle emissions by in-use diesel buses of various generations at low-load regimes

作者：Tartakovsky L^*; Baibikov V; Comte P; Czerwinski J; Mayer A; Veinblat M; Zimmerli Y

来源：Atmospheric Environment, 2015, 107: 273-280.

DOI：10.1016/j.atmosenv.2015.02.052

• Ultrafine particles
• Diesel engine
• Diesel particle filter
• Filter retrofitting

Ultrafine particles (UFP) are major contributors to air pollution due to their easy gas-like penetration into the human organism, causing adverse health effects. This study analyzes UFP emissions by buses of different technologies (from Euro II till Euro V EEV - Enhanced Environmentally-friendly Vehicle) at low-load regimes. Additionally, the emission-reduction potential of retrofitting with a diesel particle filter (DPF) is demonstrated. A comparison of the measured, engine-out, particle number concentrations (PNC) for buses of different technological generations shows that no substantial reduction of engine-out emissions at low-load operating modes is observed for newer bus generations. Retrofitting the in-use urban and interurban buses of Euro II till Euro IV technologies by the VERT-certified DPF confirmed its high efficiency in reduction of UFP emissions. Particle-count filtration efficiency values of the retrofit DPF were found to be extremely high - greater than 99.8%, similar to that of the OEM filter in the Euro V bus.

• 出版日期2015-4