misinformation rides again!!!!

[roclist@accessconsulting.ca (Jason Adams)]

Oh, man!

>From what I've read...

regarding the newer (post 99) models...

Pay no attention to the sticker on the back of the car... it's a tradename
at this point... (quattro/4motion...etc)

How the power splits front to rear...
Longitudinally mounted engine cars get the TORSEN center diff (A4, A6, A8,
Passat 4motion)

"4MOTIONT permanent all-wheel drive system, includes torque sensing center
differential (available with automatic transmission only)"

Transversally Mounted engine cars get the HALDEX wet clutch system (TT) note
this is not a differential.

how the power to the wheels is split left to right though, I won't comment
on...

Jason Adams
Fahrvergnugen Forever!


----- Original Message -----
From: "Marc Peterson" <mpeters6@rochester.rr.com>
To: <scirocco-l@scirocco.org>
Sent: Monday, March 11, 2002 11:35 AM
Subject: Re: misinformation rides again!!!!


> Wrong-amungo there good buddy...the quattro system and the Haldex
(4-motion)
> system are not related.  From Haldextraction web site:
>
> "The design of the Haldex LSC is based on a Swedish patent acquired by the
> Haldex Group.  The unique design of the Haldex LSC comprises three
> functional parts:
> - The hydraulic pump driven by
> - the slip between the axles/wheels.
> - The wet multi-plate clutch.
> - The controllable throttle valve
> - with its electronics.
> The unit can be viewed as a hydraulic pump, where the housing and an
annular
> piston are connected to one shaft and a piston actuator connected to the
> other.
> The two shafts are connected via the wet multi-plate clutch pack, normally
> unloaded and thus transferring no torque between the shafts.
> When both shaft are rotating at the same speed, there is no pumping
action.
> Immediately as a speed difference occurs, the pumping and starts to
generate
> oil pressure. As a piston pump there is virtually instant reaction with no
> low speed pumping loss.
> The oil flows to a clutch piston, compressing the clutch pack, braking the
> speed difference between the axles. The oil returns to the reservoir via a
> contollable throttle valve, which controls the oil pressure and the force
on
> the clutch package.
> In traction/high slip conditions a high pressure is delivered, while in
> tight curves, i.e. parking, or at high speeds a much lower pressure is
> provided.
>
> Quattro, OTOH, "in its current state makes use of a Torsen self-locking
> center differential between the front and rear axles that allows for
> diversion of up to two-thirds of the engine's power to be diverted to the
> front or the back. Current versions of quattro also make use of an
> electronic differential lock (EDL) that allows the Audi to maintain
forward
> momentum even with only a single tire having sufficient grip." From
vwvortex
>
> Basically, Quattro has a mechanical center differential and electronic
front
> and rear differential slip control using the abs system.  Earlier versions
> used a manual locking system on the rear diff.
>
> Haldex uses a fluid center differential with the above mentioned F&R diff
> slip control.
>
> Totally different systems, and different driving dynamics too.
>
> Marc
> ----- Original Message -----
> From: "Christian Els" <tiAn@usiw.net>
> To: <scirocco-l@scirocco.org>
> Cc: "Marc Peterson" <mpeters6@rochester.rr.com>
> Sent: Monday, March 11, 2002 12:58 PM
> Subject: Re: misinformation rides again!!!!
>
>
> >
> > ----- Original Message -----
> > From: "Marc Peterson" <mpeters6@r...>
> >
> > > Holy smokes!!!  Misinformation city!
> > >
> > > OK, in no particular order, here goes...
> > > 1) the only vehicle sold in the US with the 4-motion system is the
Audi
> > TT.
> >
> >
> > While we're on the topic, I have yet to hear any definitive argument
> > distinguishing "Quattro" from "Synchro" from "4-Motion" -- all those
names
> > are just that -- names.
> >
> > Sure the technology has changed a bit as time passed but they are
> marketing
> > phraseology  for VAG's relatively identical flavors of all-wheel-drive.
> >
> > Even if some one out there does have the information to show me the
error
> of
> > my ways, the back of every TT I've looked at has a "Quattro" badge on it
> and
> > the back of the few Passat's with AWD that I have happened by have
stated
> > "4-Motion" so I beg to differ with Marc's statement above.
> >
> > Regards,
> >
> > Christian Els
> > 1991 325iX
> > was 1998 Mitsu GSX
> > was 1988 Mazda GTX
> > was 1987 5KTQSW
> > likes AWD...
> >
> >
> >
> >
> > _______________________________________________
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> > Scirocco-l@scirocco.org
> > http://neubayern.net/mailman/listinfo/scirocco-l
> >
>
>
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