Quaife (operation of a quaife)

[amalventano1@comcast.net (Allyn)]

holy crap! i understand that perfectally but doesnt that design imply that there are 'wearable
parts'? i thought a quaife would last forever :).
any details on how wear is controlled/eliminated?
Al

----- Original Message -----
From: "Dan Bubb" <jdbubb@ix.netcom.com>
To: "Allyn" <amalventano1@comcast.net>
Cc: <bbeacock@rogers.com>; "Scirocco. org Mailing List" <scirocco-l@scirocco.org>
Sent: Thursday, August 15, 2002 2:14 PM
Subject: Re: Quaife (operation of a quaife)


> 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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