Under the general context of Energy conservation and emission reduction, vehicles' fuel consumption and emission reduction become more and more important since the road transport is responsible for about 20% of carbon dioxide emissions. Except weight reduction, minimizing of the aerodynamic drag is also very important since it offers valuable benefits regarding to the fuel consumptions and carbon dioxide emissions. The height adjustment of the vehicle height is an effective way to reduce aerodynamic resistance and at the mean time introducing versatility to the vehicle, for example, off road uses. The aim of this thesis is to present in a systematic way to current existing solutions of different types of height adjustment systems for passenger cars, summarizing the main features, working principles and the architectures.