Characterization of Particle Number Setups for Measuring Brake Particle Emissions and Comparison with Exhaust Setups

The stringency of vehicle exhaust emissions regulations resulted in a significant decrease particulate matter (PM) over the years. Non-exhaust particles (i.e., from brakes and tyres) account for almost half or more road transport-induced ambient PM. Even with internal combustion engine ban 2035, electrified vehicles will still emit PM brake tyre wear. Consequently, non-exhaust cannot significantly without any regulatory measures. Because independent research carried out under different methods is not readily comparable, Global Technical Regulation (GTR), which sets procedures boundaries testing wear particle emissions, currently development. This overview describes number (PN) measurement setup based on well-known PN methodology. We provide technical requirements expected maximum losses. In addition, we estimate effect losses differences between setups typical size distributions observed during testing. Finally, compare specifications to those PN.