Dynamometric Investigation on Airborne Particulate Matter from Automobile Brake: Impact of Disc Materials on Brake Emission Factor

Mu Hyeok Jeong, Won Cheol Shin, Yoon Suk Oh, Jungju Lee, Seung Hun Huh, Jae Hwan Pee, Hyungjo Seo, Ho Jang, Jong Young Kim

Research output: Contribution to journalArticlepeer-review

Abstract

In this work, we evaluated the impact of disc rotors of gray cast iron (GCI), nitrocarburized (NC), and superhard ceramic-coated (SCC) GCI on the brake wear PM emissions of passenger vehicles using dynamometric measurements. The brake emission factor (BEF) of the SCC was greatly reduced by more than a factor of 1/5 compared with those for the GCI and NC for both low-steel and non-steel friction materials. Surface topological and microstructural analyses confirmed that more severe wear was pronounced for the NC rotor compared with the SCC, as evidenced by large concave pits in the wear tracks. Analysis of the size-classified airborne PM suggests that reduced micron-sized particles, which originated from the GCI disc, were responsible for the lower BEF due to the increased hardness of the SCC.

Original languageEnglish
Article number526
JournalLubricants
Volume11
Issue number12
DOIs
Publication statusPublished - 2023 Dec

Bibliographical note

Publisher Copyright:
© 2023 by the authors.

Keywords

  • brake wear
  • disc rotor
  • dynamometer
  • friction materials
  • particulate emission

ASJC Scopus subject areas

  • Mechanical Engineering
  • Surfaces, Coatings and Films

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