PM10 from the wear of disc brakes could contribute up to 50 % of the total non-exhaust emissions from road transport in EU. The wear originates from the contact surfaces of the friction material and the disc. One possible way of decreasing the PM10 emissions is to change the materials of the contact pair in terms of composition and coatings. Therefore the particle emissions of three novel friction material formulations, one novel disc formulation, and one disc coating have been investigated. Pin-on-disc tests have been run to rank the novel materials in terms of particle concentration as registered with TSI CPC, TSI OPS, and DEKATI ELPI+. The result shows that it is possible to achieve a reduction of particle emission up to 50% by changing the materials of the contact pair.

Lyu Yezhe, Jens Wahlström Jens, Anders Söderberg, Department of Machine Design, KTH Royal Institute of Technology, Sweden; Matejka Vlastimil, Brembo S.p.A, Italy.