RESEARCH OF BRAKE PADS PERFORMANCE CHARACTERISTIC

Abstract

The article presents a study of the operational properties of brake pads. During the test, brake pads from six different manufacturers are examined, which are suitable for the same vehicle. The tests shall be carried out on the GARLING brake pad test bench under the same test conditions for all the brake pads under examination. During the study, the values of the friction coefficient μ_op, μ_min, μ_max of the brake pads, the variation of the friction coefficient during the cycle μ_vid, the dependence of the friction coefficient on temperature and the coefficient of wear are recorded.

Under normal driving conditions, the temperature of the brake discs and pads can vary from 100 °C to 300 °C. With strong or prolonged braking, the temperature may also rise above 400 °C. During the study, the brake pads of the sample T3 reached a temperature of 820.68 °C and maintained a stable friction coefficient of μ_vid 0.438. As the temperature of the brake pads of the sample T1 increased to 857.80 °C, the friction coefficient μ increased from 0.4 to 0.599, respectively. Brake pads T2 achieved a maximum temperature of 573.3 °C and a decreasing friction coefficient μ varied from 0.475 to 0.275. During braking, the brake pads of the sample T4 reached a low temperature of 510.97 °C had a decreasing friction coefficient μ from 0.413 to 0.250. As can be seen, with increasing temperature, these pads did not retain a constant value of the friction coefficient, which indicates worse performance. The results of the study confirm that the quality and characteristics of the brake pads on the market can have a significant impact on braking efficiency, safety during emergency braking and travel comfort. These factors can be decisive for the driver to ensure optimal handling of the car and braking performance in various situations, including emergency brakes.