Quaife (operation of a quaife)

[jdbubb@ix.netcom.com (Dan Bubb)]

I will try to be nice.
This description of how the Quaife works is completely wrong.

Try the following description:

Torque biasing operation is based on the fact that worm gears transmit
torque efficiently only in one direction. In practice, side gears are
coupled to each axle and mate with several pair of overlapping planetary
worm gears. These worm gears float in the housing and when power is
applied, the gears are pushed outward, causing friction between their
tips and the recesses inside the case, thus resisting rotation. This
allows more torque to be biased toward the wheel with more traction. 

We have two means of adjusting torque biasing differentials. The first
is by the helix angle and pressure angle of the gears; the second is by
varying the number of beveled washers exerting outward pressure between
the end gears. However, the only practical adjustment is the preload of
the end gears. 

Dan
trying not to be a dick.

Allyn wrote:
> 
> quaifes 'cheat' to sense torque, as they sense it based on relative motion between the 2 axles. it
> is effectively a multiple-gear tranny fluid pump. the pump is driven by relative axle motion (one
> faster than the other). this pump has a very high discharge head provided by an orifice that the
> tranny fluid is crammed through. The result is a logarithmic resistance (read - torque transfer to
> idle wheel), as the difference in wheel speeds increases. this is how the quaife pulls this off with
> no wearing friction pads/parts. its nothing more than an over-engineered oil pump.
> 
> so... with the one wheel off the ground trick, as the idle wheel spins faster, the pump raises
> discharge pressure, resisting the relative motion, thus transferring torque to the wheel that needs
> it (just like its supposed to).
> 
> i picked this operation up my studying the quaife guts pic that has floated around the net (as well
> as cheapass rons uninstalled quaife at cincy).
> Al
> 
> Allyn Malventano, ETC(SS), USN
> 87 Rieger GTO Scirocco 16v (daily driver, 180k, rocco #6)
> 86 Kamei Twin 16V Turbo Scirocco GTX ('it has begun', rocco #7)
> 86.5 Occo 16v Trailer (dotting 'i's across the country, rocco #8)
> 87 Jetta 8v Wolfsburg 2dr (daily driver, 260k, 0 rattles, original clutch, driveshafts, wheels :)
> 
> ----- Original Message -----
> From: "Ben Beacock" <bennyb2k4@sympatico.ca>
> To: "Scirocco. org Mailing List" <scirocco-l@scirocco.org>
> Sent: Wednesday, August 14, 2002 8:11 PM
> Subject: RE: Quaife
> 
> > That wouldn't work unless you lightly apply the brakes.  The Quaife
> > "biases" the torque at a ratio of about 5 to 1.  So if there is no
> > torque on the lifted wheel, there is no torque to bias to the wheel on
> > the ground.  If you apply the brakes, there is a torque applied to the
> > wheel in there air, so the one on the ground will receive 4 times that
> > in motion (brakes on the other side are on too)
> >
> > Ben
> >
> >
> > -----Original Message-----
> > From: scirocco-l-admin@scirocco.org
> > [mailto:scirocco-l-admin@scirocco.org] On Behalf Of Tyler P.
> > Sent: August 14, 2002 7:44 PM
> > To: List (E-mail)
> > Subject: RE: Quaife
> >
> > I guess you could jack it up on one side in the front.  Turn on your car
> > and
> > put it into gear and give it some gas.  If the wheel in the air spins
> > but
> > the other one on the ground is happy then you don't got a quaife.
> > However,
> > if you do have a quaife you may not be on that jack much longer :o)  At
> > least I think this would be a way to test it, though I don't speak from
> > experiance.
> >
> > -----Original Message-----
> > From: Jim Mikesh [mailto:j.mikes@verizon.net]
> > Sent: Wednesday, August 14, 2002 4:41 PM
> > To: scirocco-l@scirocco.org
> > Subject: Quaife
> >
> >
> > How can I tell if my transmission has a quaife installed.  Quite some
> > time
> > ago there was a thread about a "quick" check.  If someone remembers
> > please
> > drop me a note so I can check my transmission.
> > Thank you
> > Jim
> >
> >
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