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Hydrolock self-locking differential |
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Hydrolock self-locking differential |
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Voith Hydrolock is a hydrostatic, self-locking differential. The planetary gears operate like gear pumps. If one drive axle rotates faster than the other one, for example because of different friction values, the planetary gears transport oil against the closed outlet. Oil pressure is created which generates a lock-up torque. This lock-up torque is taken away from the fast running axle by means of the differential effect and reallocated to the slower axle. The total amount of torque remains constant, which means that the relative motor torque is fully transmitted to the rails both in braking and in tractive operation, irrespective of the difference in friction values.
Hydrolock self-locking differential
The advantages of the Voith Hydrolock
- No lock-up torque in curves
- Increased utilisation of tractive and braking effort
- Reduced losses
- Lower wear on drive wheel and rails
- Reduced longitudinal slip, therefore no squealing noises when driving round curves.
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