Abstract
Multi-link rear axles offer some important advantages relative to vehicle handling. But the structure of the multilink split type generally determines kinematic incompatibilities in its operation. The paper studies some aspects surrounding constructive solutions that could minimize these kinematic incompatibilities. Some rear axle mechanisms from different cars were measured and analyzed as component shape by authors; this process allows the geometrical modeling and animation of systems using specialized software (Autodesk Inventor Professional 8). The effects of these modeled structures (the variations of track width and wheel camber angle) have been studied using the above-mentioned software. The variation of track width caused by the studied mechanisms along the compression and relaxation of the suspension spring defines the trajectory of the tyre contact patch. The results are contextualized in diagrams showing that the modifications of the analyzed parameters are very important, with a negative influence on car stability and the comfort of passengers. The interpretation of these diagrams allows the choice of favorable constructive solutions to increase car performance.
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