Emissions of Non-regulated Pollutants from European Passenger Cars of Different Technology

Passenger cars emit exhaust emissions of regulated pollutants (CO, HC, NOx in the case of gasoline engines and also particulate matter (PM) in the case of diesel engines); however, they also emit several other pollutants which are not regulated (non-regulated pollutants, NRP). These pollutants are emitted in much lower concentrations than the regulated ones; however, they are sometimes much more dangerous for the environment and the human health. This work shows the emissions of several non-regulated pollutants of gasoline and diesel European passenger cars tested on the New European Driving Cycle. The pollutants studied in this work are individual HC and HC families, N₂O and NH₃, carbonyl compounds, PAH and nitro-PAH. The impact of emission technology from Euro1 to Tax Incentives Euro4, which are related with the emission level of regulated pollutants, and of mileage are presented and discussed.