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The aim of this work is to demonstrate the methodology used to optimize a knuckle for Mac Pherson to improve weight reduction and cost considering the various engineering design criteria that apply to this type of component. The engineering design criteria surrounding this development and that will be present in the study are: stiffness, critical loads, fatigue and plasticity (permanent deformation).

The production of vehicles with low noise and vibration level at low costs has been one of the main targets of the automobilist industry. The noise level heard by the passengers inside the vehicle influences directly on the perception they have about the car. On the other hand, low prices are extremely necessary to keep the projects competitive on the sales market. This job analyses the impact caused over the noise heard inside the vehicle when a change was applied on the design of the halfshaft: the substitution of a tubular shaft by a barshaft. The main goal of this design change is the cost reduction.