Technical Paper
Investigation of EURO-5/6 Level Particle Number Emissions of European Diesel Light Duty Vehicles
2010-04-12
2010-01-0789
Particle number emissions are measured with two instruments according to the upcoming European emission regulations for light-duty diesel passenger vehicles and compared to data from other methods, including the current regulatory total particulate matter (PM) mass, photo-acoustic soot sensor (PASS) and engine exhaust particle sizer (EEPS). At the very low emission levels of diesel particulate filter (DPF) equipped vehicles, the solid particle number data correlate well with soot mass and with particle number measured by EEPS, if only those particles belonging to the accumulation mode are considered in the latter case. PN differences of ≻100% between tests of the same vehicle are observed. Comparison of the two PN instruments and the photoacoustic soot sensor show that these are systematic differences which originate primarily with the vehicle and not from instrument uncertainties.