Arrangement for and method of automatically controlling a differential lock in drive axles of a motor vehicle
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United States of America Patent
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-
Mar 14, 2000
Grant Date -
N/A
app pub date -
Jun 30, 1997
filing date -
Jul 1, 1996
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
For automatically controlling a differential lock in drive axles of a motor vehicle, an arrangement has a lock coupling, an actuator for actuating the lock coupling, a plurality of rotary speed sensors associated with wheels of the vehicle for forming the rotary speed signal, a control unit for receiving the rotary speed signals and forming a control signal for controlling the actuator means, the 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 from 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, and a second comparing unit for forming the control signal so that when the difference rotary speed value exceeds a predetermined threshold value the lock coupling is engaged and when the difference rotary speed value is under a predetermined threshold value the lock coupling is disengaged.
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