Análise de posição da geometria de uma suspensão do tipo duplo a para traseira de um protótipo veicular off road

Abstract

The purpose of the present work is to study a double wishbone suspension geometry to be applied in a prototype off-road vehicle, because currently the Swing Axle suspension is used, which has limitations in adjusting the wheel geometry and a high positive and negative camber gain when the suspension oscillates, so the development of a double-A suspension will provide a better adjustment of the wheel geometry compared to the Swing Axle suspension. The first step was a literature review where the main characteristics of the double-A and Swing Axle suspensions are described. After that, the main suspension components and their geometries that will be used to develop the double-A suspension are presented. The study occurred through the modeling and analytical analysis of the mechanism using 3D CAD software. The evaluations consisted in the parameters of camber, roll center, divergence, and convergence. The results obtained from the development of this work were the possibility of a better adjustment of the wheel geometry in comparison to the Swing Axle suspension, as well as the adjustment of the camber angle and oversteer of the wheels.