Journal Article

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

Agudelo, Carlos, Vedula, RaviTeja, Gramstat, Sebastian, Grigoratos, Theodoros, Mathissen, Marcel, Mamakos, Athanasios, Giechaskiel, Barouch

2023

Overview

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

• Publisher: MDPI AG
• Subject: Air pollution / Automobiles / Brake drums / brake wear emissions / Brakes / By-products / Cooling / Disc brakes / Drum brakes / Emission measurements / Emissions / Environmental aspects / Environmental monitoring / interlaboratory study / Mass / Measurement / non-exhaust emissions / OEM / particle mass emissions / particle mass losses / Particle size / Particles / Particulate emissions / Particulate matter / Particulate matter emissions / PM2.5 and PM10 emission factors / Pollutants / Properties / Reproducibility / Suspended particulate matter / Task forces / Test facilities / Testing / Vehicles / Wear particles