Análise geométrica de um sistema de suspensão dianteiro tipo duplo-A otimizado de um veículo tipo Baja SAE

Abstract

Within the automotive world, the search for new methods and technologies that can facilitate the construction of increasingly controlled vehicles for better performance has always been the objective of engineers. In Baja Sae projects this is no different; since its creation in 1976 at the University of South Carolina in the United States to the current competitions organized by SAE BRAZIL where it is proposed to students according to regulation (2018a) the design and construction of an off-road prototype, single-seat, robust, aimed at marketing to enthusiastic and non-professional audiences. This vehicle must be safe, easily transported and simple to maintain and operate, as well as being capable of overcoming rough terrain in any weather condition. The Baja SAE team of the Federal Institute of Science and Technology of Piauí IFPI Baja SAE created in 2009 with its first competition in 2010, has always tried to combine the technical knowledge seen in the classroom with the applicability in the competition, aiming for continuous improvement in competitions. The author of this study, and a former member of the team, identified the need to improve a defined suspension geometry in the early stages of the project, thus obtaining better vehicle performance. Thus, this work aims to analyze the behavior of the geometry of an optimized double-A front suspension. Where for this an optimization routine based on the height of the roll center of the system and on restrictions of the working travel parameters of a suspension such as camber and gauge variation is applied. With this, we will obtain an initial suspension geometry pattern capable of satisfying and maintaining the vehicle's stability when entering curves, as well as serving as a solid and consolidated basis for subsequent studies in the area of suspension systems and their optimizations.