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Development of a brake wear particle collector utilizing a forced-floating concept for Euro-7 compliance.

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Title: Development of a brake wear particle collector utilizing a forced-floating concept for Euro-7 compliance.
Authors: Woo, Sang-Hee1 (AUTHOR), Kim, Minki1 (AUTHOR), Jang, Hyoungjoon1 (AUTHOR), Yu, Seungwoo2 (AUTHOR), Kim, Daehyun2 (AUTHOR), Kim, Ghuiyeon2 (AUTHOR), Lee, Seokhwan1 (AUTHOR) shlee@kimm.re.kr
Source: Aerosol Science & Technology. Mar2026, Vol. 60 Issue 3, p197-212. 16p.
Subjects: Emission control, Electrostatic precipitation, Emission standards, Particulate matter, Mechanical efficiency, Flotation, Computer simulation, Friction
Abstract: The upcoming Euro-7 emission standard, set to take effect in 2026, includes restrictions on brake-wear particles (BWP) emissions. To comply with this regulation, various BWP emission-reduction devices are currently under development. In this study, we developed a BWP collector that employs a forced-floating concept to achieve high particle collection efficiency with a relatively low intake airflow. The proposed particle collector consists of two main components: a suction section based on the forced-floating concept and a collection section utilizing electrostatic precipitation. Performance evaluations were conducted under laboratory conditions using a brake dynamometer and under real-world driving conditions using an actual vehicle. Additionally, computational simulations were performed to analyze the trajectory of the ingested particles and airflow distribution around the collector. Laboratory measurements using low-metallic (LM) brake pads showed that the BWP PM10 emission factor decreased from 14.72 to 6.03 mg/km/veh, representing a 59.1% reduction. On-road driving tests also demonstrated a reduction in the BWP PM10 emission factor from 12.13 to 4.93 mg/km/veh, corresponding to a 59.4% reduction, which was consistent with the laboratory experimental results. Computational simulations confirmed that the BWPs generated at the brake disk–pad interface were effectively collected, as intended by the forced-floating concept. Copyright © 2025 American Association for Aerosol Research [ABSTRACT FROM AUTHOR]
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Database: Engineering Source
Description
Abstract:The upcoming Euro-7 emission standard, set to take effect in 2026, includes restrictions on brake-wear particles (BWP) emissions. To comply with this regulation, various BWP emission-reduction devices are currently under development. In this study, we developed a BWP collector that employs a forced-floating concept to achieve high particle collection efficiency with a relatively low intake airflow. The proposed particle collector consists of two main components: a suction section based on the forced-floating concept and a collection section utilizing electrostatic precipitation. Performance evaluations were conducted under laboratory conditions using a brake dynamometer and under real-world driving conditions using an actual vehicle. Additionally, computational simulations were performed to analyze the trajectory of the ingested particles and airflow distribution around the collector. Laboratory measurements using low-metallic (LM) brake pads showed that the BWP PM10 emission factor decreased from 14.72 to 6.03 mg/km/veh, representing a 59.1% reduction. On-road driving tests also demonstrated a reduction in the BWP PM10 emission factor from 12.13 to 4.93 mg/km/veh, corresponding to a 59.4% reduction, which was consistent with the laboratory experimental results. Computational simulations confirmed that the BWPs generated at the brake disk–pad interface were effectively collected, as intended by the forced-floating concept. Copyright © 2025 American Association for Aerosol Research [ABSTRACT FROM AUTHOR]
ISSN:02786826
DOI:10.1080/02786826.2025.2601179