Mechanical frictions phenomena, related to the wear and the abrasion of tyres, brakes, clutch, and road surface, are responsible for significant particle emissions of the non-exhaust road vehicles which are considered as vectors of various toxic, carcinogens or mutagen substances. Their rate is high and the particles represent, today, major impacts on public health and on the environment. Physical characteristics of the non-exhaust road transport and surface emissions could be analyzed in a laboratory situation under controlled condition if suitable deceleration profiles and sampling systems are developed having the ability to increase the non-exhaust emissions. The aim of this paper is to develop the deceleration profiles, thus increasing the production rate of particles during urban, suburban, and highway driving conditions, allowing their identification and analysis. Experiments have been performed confirming the reliability of the developed braking profiles. A load effect, a large clustering, and the presence of isolated clusters and fibers have been observed. Size analysis indicated a high production of the particles in the range of [7 nm, 4 Ám]. Further experiments and processing of data is necessary to confirm identification and quantification of the non-exhaust emissions taking into account atmospheric and turbulence features and the traffic.
Keywords: deceleration profiles, brake, non-exhaust emissions, fine and ultrafine particle sizes, size distributions, physical behavior, environment, air quality.