Interlaboratory Study on Brake Particle Emissions—Part I: Particulate Matter Mass Emissions

The Particle Measurement Programme Informal Working Group (PMP-IWG) coordinated a global interlaboratory study (ILS) on brake wear particle emissions with the participation of 16 testing facilities. Two articles present main outcomes ILS: (I) Particulate matter mass (PM), and (II) Number (PN) emissions. test matrix covered wide variety systems configurations. tested disc brakes were found to emit PM2.5 PM10 that varied between 0.8–4.0 mg/km 2.2–9.5 per brake, respectively, depending type applied load. drum emitted much lower PM due its enclosed nature. Almost 37–45% falls in fine size this fraction being higher for brake. On other hand, almost 50–65% total loss sizes larger than 10 μm or gets lost before measured. most important mechanisms proposed layout are discussed. Finally, measurement variability lab-to-lab reproducibility investigated.