Analysis of brake system emissions and evaluation of possible mitigation strategies

The specific objective of the following PhD thesis is to define a methodology capable of determining, both qualitatively and quantitatively, the various pollutant emissions primarily due to surface abrasion (and thus their different performance over time), based on the operational parameters of brake systems and their main components (external coating surfaces and friction materials used for pads and discs). This will allow for the evaluation of potential mitigation strategies, such as the use of low-wear materials (for both discs and pads) and the possible contribution of abatement solutions. Figure 1 the project follows a structured approach, beginning with a comprehensive review of the state of the art regarding braking systems and emission measurement methodologies. This initial phase aims to establish a solid knowledge base on the current technologies, challenges, and existing assessment techniques. Subsequently, the focus shifts to a specific case study within the TPL sector, which is investigated through a combination of controlled experiments and real-world measurements. Laboratory tests will be conducted using a dynamometric test bench to evaluate wear processes under standardized conditions, while field measurements will be carried out on operational public transport vehicles to capture real-world emission data. In addition to the experimental activities, the project also includes a computational analysis aimed at quantifying the dispersion of particulate matter emissions from brake wear. This modeling phase will assess the contribution of braking-related PM10 emissions to overall air pollution levels, providing a broader perspective on their environmental impact. Ultimately, the insights gained from this research will support the evaluation of potential mitigation strategies, such as the use of low-wear materials for both brake discs and pads, as well as the feasibility of implementing emission reduction solutions.