Projeto de um sistema de freio aplicado a um veículo Baja SAE

Abstract

This work presents the design of a brake system developed for a Baja vehicle, which intends to contemplate the competition rules, obtain a good response and braking distribution, simplicity of manufacture, assembly and maintenance, reduced cost and mass, in addition to resisting with security to expected efforts. With this intention, a bibliographic review was carried out, listing the requirements of the regulation, concepts of vehicle dynamics and characteristics of automotive hydraulic brake system components. From the references and experience obtained in the extension project, commercial brake calipers and master cylinder were selected, seen as the most adequate for this project. The diameters of the brake discs were determined. The brake pedal and a support for it and the master cylinder were modeled. In order to define a resistant and light geometry, a structural static simulation and topology optimization of the pedal body were carried out in order to resist a force of 2000 N. In addition, a volumetric analysis of the brake fluid quantity was carried out, which is rarely considered in similar works. The obtained set was discussed, which is theoretically capable of locking both axles on a paved road with an application force lesser than 445 N. The total cost of the system was estimated at R$ 1300.00 without adjustable proportionality valve and R$ 1540.00 with the system refinement device. Finally, some recommendations for future work were made.