Quote:
Originally Posted by Dean
Other forces such as a clutch acting between the same two axis as the planetary gears most certainly can effect the split.
In the extreme case, consider if we weld the planetaries to the sun and ring gear. We have in no way changed the number of teeth or diameter of any of the gears, but I guarantee the split is 50/50.
The clutch is just a variable weld.  |
Let me ask you this: if the clutch on your motor is slipping, can you get all the power/torque the motor is generating to the transmission? Of course not.
If the clutch in the DCCD is slipping, it too is taking power from the wheels. But what we gain is the resistance of the clutch acting as something for the diff to push against when the tires on one half of the car are slipping. That way you can generate torque through the open diff. But that doesn't change the gearing of the diff, 35% is still the max that can go to the front, 65% is the max at the rear. Sure the observed f/r torque split may be 50/50 with diff in "locked" mode, but that's only because, at best, the torque is really 35% front / 35% rear / 30% diff clutches. The physical split at the differential doesn't change.
Welding the the diff shut *does* effectively change the "number of teeth" in diff, it makes the ration 1:1, not the normal 35:65. The clutch is not like a "variable weld". Even with the clutch completely locked up, the gearing in the diff still splits the torque 35/65... remember, even though the wheels are turning at the same speed w/ the DCCD clutch locked, there is still more torque being applied to the rear wheels than the fronts.