Overload warning device for a trailer brake

摘要

Overload warning device for a trailer brake in a trailer brake system adjusted to a set deceleration. …??A known overload warning device monitors the temperature of the trailer brake as a measurement of its load and by means of a temperature comparator emits a warning signal when a temperature occurs which is characteristic of an overload. The disadvantage to this is the time lag of the temperature monitoring. The known overload warning device therefore has the disadvantage that it only responds once the trailer brake may have already sustained damage. …??The invention proposes to compare the operating energies fed to the tractor vehicle brake and those fed to the trailer brake, to derive a comparative value therefrom and to emit the warning signal when the comparative value varies at a predetermined critical rate of change or faster than this. The invention thereby utilises the rapid fall in braking force accompanying the brake overload and the rapid increase in energy caused by this for readjusting the brake deceleration. …??The invention may advantageously be used for the detection of "fading" of the trailer brake. …IMAGE…