LOAD CALCULATING SYSTEM FOR A GOODS VEHICLE

摘要

Load calculation system for a freight vehicle comprising a tractor unit (4) and a semitrailer (10) connected to the latter via a fifth−wheel coupling (6). The tractor unit has a front axle (16) and a rear axle (20) fitted to its loadbearing frame (8) by means of various kinds of suspension systems. The suspension system of the rear axle comprises pneumatic springs (24) such as air bellows. The system incorporates sensors (26) which are arranged adjacent to the pneumatic springs in the suspension system of the rear axle and are intended to determine the weight bearing upon the rear axle. On board the tractor unit there is a computer (28) in which it is possible to save: information about the tractor vehicle's wheelbase (B), data concerning the position of the point of application (6) of the load deriving from the semitrailer (10) which acts upon the tractor unit (4), and data concerning the weight bearing upon the rear axle (20) when the vehicle is laden and unladen respectively. The computer (28) incorporates a calculation unit (30) for calculating the weight bearing upon the front axle (16) when the vehicle is laden. The front axle suspension system of the freight vehicle is of the leaf spring type and has not detector of its own for determining the weight on the front axle.