Patent ID: 6038506
Filing Date: 2000-03-14
Classification: B60K

Abstract:
An arrangement for automatically controlling a differential lock in drive axles of a motor vehicle, comprising a lock coupling; actuator means for actuating said lock coupling; a plurality of rotary speed sensors each associated with a respective one of the wheels of the vehicle for forming the rotary speed signal; a control unit for receiving said rotary speed signals and forming a control signal for controlling said actuator means, said control unit including computing means for computing a nominal rotary speed value associated with each of the wheels so that a computed nominal rotary speed value is determined continuously in dependence on a corresponding traveling condition, a first comparing unit for forming a difference rotary speed value from a comparison of a measured rotary speed value with the computed nominal rotary speed value for each of the wheels, and a second unit for forming the control signal so that when the difference rotary speed value associated with at least one of the wheels exceeds a predetermined threshold value said lock coupling is engaged and when the difference rotary speed value is under a predetermined threshold value said lock coupling is disengaged.