Torsen is brand name and Gleason (?) have in recent years protected their
brand name product.
Torsen means Torque Sensing and is a gear type diff and was first used, to my
knowledge, in the original Audi Quatro (I guess it used 3?). A torsen diff
gradually locks up the diff action to a preset 80 or 95% or whatever. A
Quaife
diff is a torsen but they've had to call it automatic torque biasing. The
Phantom Grip has a torsen effect but is a device to modify the behaviour of a
diff.
An LSD or plate type diff doesn't sense torque but I think speed. What
happens is that it doesn't lock across the diff but switches power to one
wheel -
the one with grip. This is a Trannex, Gripper or the ZF like in some BMWs.
I always think of viscous as a viscous coupling rather than a diff but I
suppose they can be made as a diff. Ferguson have the patent on them as far
as I
know. I'm less certain how a viscous works but expect a similar response to a
Torsen.
The driven characteristics between a Torsen and an LSD is markedly different.
Regards
Daniel1312
In a message dated 21/06/07 19:07:36 GMT Daylight Time, derf247@gmail.com
writes:
> LSD
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