An active-type dust collector that reduces brake wear particle (BWP) emission

Abstract

Brake wear particles (BWPs) are a major particulate matter (PM) emission of vehicles and they will be regulated under EURO-7 emission standards. To comply with EURO-7, some BWP emission reduction devices have been recently developed. However, most of the studies tested the devices in laboratory conditions, not actual vehicle conditions. In this study, a dust collector composed of a suction device and an electrostatic precipitator (EP) was developed to reduce BWP emission and it was tested on laboratory and actual vehicle. The collection efficiency (CE) of EP was studied under laboratory conditions using a brake dynamometer. More than 95% of BWPs were removed when the EP exhibited a corona charge imparted using a carbon brush. CE would not be changed in laboratory and actual vehicle conditions. The suction efficiency (SE) of the suction device was tested in laboratory and actual vehicle conditions. In the laboratory, the SE decreased from a maximum of 88–62% as the disk rotational speed increased. Although it was possible to maintain the EP CE above 95%, the SE was approximately 70%; the overall BWP reduction efficiency remained in the 60% range. SE had a dominant effect on total reduction efficiency. For actual vehicle testing, the reduction efficiency was 75%, higher than the value measured in laboratory conditions. Therefore, BWP emission reduction device must be tested in actual vehicles to estimate their efficiency in the real-world.

Copyright © 2024 American Association for Aerosol Research

Graphical Abstract

EDITOR:

• Pramod Kulkarni

Disclosure statement

No potential conflict of interest was reported by the author(s).

Additional information

Funding

This work was supported by the National Research Foundation of Korea (NRF) grant funded by the Korea government (MSIT) (No. RS-2023-00282244).