An upcoming fine dust regulation is recently the most challenging issue in the brake development of ICE vehicles. In regards of countermeasures to improve the fine dust behaviour the hard-metal-coated brake disc is one of the most promising ways to reduce the mass and number of brake fine dust particles. According to the current publications of the PMP-group, todays foundation brake systems emit more the 10 mg per km fine dust in the size of PM10. Since an expected regulation reduces this amount significantly, the VW group is developing and monitoring the most promising approaches to fulfil the expected legislation. Our preferred idea is to prevent the production of fine dust. To face this issue, high-speed laser gladded coatings on the brake disc friction surface is one of the mainstream technologies. Since we have a change in the tribology of the foundation brake system on the disc side, we are also developing with our partners adjusted brake pad materials. This work focuses the influence of the mechanical and chemical properties of the brake disc coating on the fine dust emission behaviour. Therefore, we performed a test sequence with different tribological systems.

AUDI AG: Dr. Sebastian Gramstat; Porsche AG: Mr. Manuel Wirth, Mr. Ingolf Eichmann; TU Braunschweig: Prof. Dr.-Ing Georg-Peter Ostermeyer; Volkswagen AG: Mr. Jan Voigt