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RE: Torsen post for Gary
> Eric, understand that the torsen should have axle slip built
> into the design, Stans point (or how could you take a turn
> in a rear diff rwd car?)
Yes, I understand that completely. What exactly in my post led
you to believe that I _don't_ understand this?
> We could see that in a 80q the radius is "significant" to
> torsen allocation and is measureable at 40m and 15m at a given
> rate of accel and other given conditions
How was this measured? Were the front and rear driveshafts
spinning at different rates? If so, according to Stan, you're
at the BR, period. Hmmm... maybe you're saying that some of the
torque is being used to compensate for the slip angle
differences between front and rear, and the split measurements
quoted in the SAE paper are what's left over? Or maybe Stan got
it wrong and the torque distribution is directly related to how
fast one driveshaft is spinning relative to the other?
> Again, you have traction and slip angle as torsen inputs.
Sure, but as you've stated countless times, it can't tell the
difference between the two. Both are treated as simply increased
or decreased resistance to rotation. From what I understand, in
order for the Torsen to begin differentiation, the resistance to
rotation of one driveshaft must be sufficiently greater than the
other, then the Torsen is _forced_ to differentiate (it won't do
it _until_ the bias ratio is reached, according to Stan), and
the whole TORqueSENsing aspect of the device is found in its
resistance to differentiation.
My understanding is that up until the point where the Torsen
differentiates it is behaving _exactly_ like the locker. It has
to. The driveshafts are spinning at the same speed, and the
gears inside the Torsen are not spinning. Things don't get
interesting until you force it to differentiate by turning.
(you'd say, "darn turns")
My question is very basic, really. Stan says that it
differentiates at the BR, 885140 seems to say that the torque
split is variable when differentiating. You say they're both
right. How's that? I don't care about the inputs, the Torsen
doesn't care or "know" where they came from (slip vs traction),
I'm just concerned with the device's outputs.
'90 CQ 20V - my 'racing-iron' ;^)