Search Results

This study aims at analyzing the causes of noise in a heavy vehicle brake system (6x2 tractor) and proposing solutions to improve comfort during braking as it is known that, during the activation of the automotive brakes, noise can be generated in different frequency bands that can cause discomfort to the user and the study of how to reduce it is considerably important to bring more comfort in its use. As a working methodology, firstly, comparative analysis of dimension and material were performed between the axle assembly that presented noise and another axle assembly of a vehicle with no noise adopted as reference. This information was used as the basis for the frequency and acceleration virtual analysis that were validated with vehicle instrumentation and data acquisition. In parallel, vehicle tests with different brake friction materials were conducted.

With the advent of CONTRAN resolution 641:2016 [1], became mandatory the Stability Control Systems on all articulated vehicles, that will be commercialized in Brazil from 2025. This resolution [1] aim to prevent the principal accident type involving heavy vehicles: The Rollover incidents. It is known that Brazilian heavy trucks market presents several peculiarities on vehicles configurations, in relation of European and American markets. Basically, it can be said that Brazilian articulated cargo vehicles are longer and heavier than American and European cargo vehicles. These characteristics make Brazilian vehicles more susceptible to lateral instabilities. These characteristics raise an important question about what will be the real effectiveness of these electronical stability control systems when it will be applied on these Brazilian cargo vehicles.