Re: vc vs awd

["Phil Ethier" <pethier@isd.net>]

From: Dave Eaton <Dave.Eaton@clear.net.nz>

>4) if however, you connect a vc to *both* sides of a centre differential,
>then the vc will act in allow interaxle slip while transferring drive to
>both output shafts.  this is a true (albeit complicated) full-time awd
>arrangement with a centre vc.

Stop me where I go wrong:

What I think you mean here is a viscous-coupling using interleaved plates in
silicone or similar liquid.  Small inputs slip easily.  Large inputs cause
the unit to "lock up" and operate without slippage.  This unit is placed in
the center of the differential "cage" in the center differential of an AWD
car.
Small variations between front axle and rear axle pass virtually unnoticed.
When one wheel spins, the VC locks up, transferring drive to the other axle.
What I have just described is the original Jeep QuadraTrac.


Phil Ethier    Saint Paul  Minnesota  USA
Lotus Europa, VW Quantum Syncro, Chev Suburban
LOON, TCVWC, MAC
pethier@isd.net     http://www.visi.com/mac/