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Due to the increasing number of heavy trucks, the number of the overweight trucks have increased, and most of them, were recorded with axle overweight. This may lead to fines for the transportation companies, and to the road damage. One of the main reasons of axle over-weight is the COG displacement, which is influenced by several factors. The main objective of this paper is to determine the way that a suspension setting can influence the cargo load distribution inside a truck-semi-trailer assembly. In order to achieve the proposed objective, a calculation principle in regarding to the influence of the suspension setting upon the axle weight distribution for heavy trucks is presented. This calculation method was validated through experimental tests. The results indicates that the suspension setting plays a great role in the uniformly distribution of the cargo load, and using a wrong suspension setting, overloading on a certain axle may appear.

Axle weight; overload; suspension; truck