Hello, as i understand, the clutch acts like a locking device between the front and rear axle.
If the clutch is fully locked, the actual torque distribution depends on weight distribution between the front and rear, tire parameters, and of course friction coefficient, and others.
If the front wheels are on a low µ surface, and the rear wheels are on high µ-surface, the front wheels can take no significant torque, and all the driving force is generated by the rear wheels (clutch in locked state). In this case, almost 100% of the torque is transferred to the rear wheels.
The valve can limit the transferred torque, and the clutch will start to slip in that case.
I think it has its similarities to a haldex system, but in its details, its different, as far as i can see. (they also state that its a new development)
Last edited by petera; 08-06-2013 at 05:35 AM.