Abstract
In this research, field and laboratory testing of three commercially available brake pads with the lowest, mid-dle, and highest price were performed. Complex field testing, where brake pads were tested in real extreme conditions on a loaded van vehicle and laboratory tests were performed. The field testing intended to investigate the temperatures that occur during the braking process and to determine the stopping distance, deceleration, and stopping time separately on the type of brake pads. Labo-ratory tests included the determination of the friction co-efficient according to ASTM G77, the structure of brake pad surfaces before and after the testing, and quantitative chemical analysis of brake pads. The aim of this study was to determine the influence of brake pad temperature on braking time depending on their purchase prices. The obtained results show a significant difference between the temperature, friction coefficient, chemical composi-tion, and braking time of the brake pads and their price.
Highlights
Throughout history, at the beginning of the automotive industry, not much attention was paid to brakes and braking systems, for which there was a justified reason
Based on the obtained results, the following can be concluded: 1) The most important factor for brake pads is the ratio of the elements Silicium (Si) and Aluminium (Al) in the chemical composition because such elements provide the formation of carbides and oxides that are formed on the surface of the brake pads and enhance improvements of the braking characteristics
Chemical elements such as Titanium (Ti) could provide the formation of titanium carbide (TiC) which is used as an abrasive
Summary
Throughout history, at the beginning of the automotive industry, not much attention was paid to brakes and braking systems, for which there was a justified reason. The first cars had engines with low power and developed low speeds, so the brakes were not such an important part of the car. As the automotive industry developed, increasing power and speed showed the importance and need for a quality braking system because the vehicle could not be stopped anymore. Automotive braking systems convert the kinetic energy of a vehicle into friction-generated thermal energy between the brake pad and the brake disc. About 90% of the energy is taken over by the brake disc, which needs to be handed over to the environment. Deformation of the Promet – Traffic&Transportation, Vol 34, 2022, No 1, 91-102
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