Method and apparatus for the diagnosis of faults in the components of suspension systems of motor vehicles

摘要

In the context of the method for the diagnosis of faults in the components of suspension systems of motor vehicles are of rotating components (1) of the chassis system due to an unbalanced mass (4) filtered vibrations generated in such a way that the of the rpm of the wheel is filtered out, which are dependent on frequency range, which the unbalance-induced oscillations of the rotating components, in an evaluation device (7) the signals of at least one of the component to be diagnosed, which is associated with the wheel carrier (3) arranged sensor (8) and at least one of the component (3) to be diagnosed, which is associated with the vehicle structure arranged sensor (9) for a predetermined measuring time is detected and stored, wherein the amplitudes of the sensor signals are sorted in ascending frequency and the mechanical impedance of the transmission chain is determined, wherein the determined mechanical impedance of the component (3) to be diagnosed with the known impedance of the component to be diagnosed (3) is compared in the undamaged state and wherein, when a deviation of the determined impedance of the component (3) to be diagnosed by the known impedance of the component to be diagnosed (3) in the undamaged state is detected, a fault of the component to be diagnosed (3) is detected.