Technical data

35
Quattro drive
The allroad quattro also has a Torsen centre
differential (basic distribution 50/50) which
transmits the forces to the front and rear
axles according to the driving conditions, at
a ratio of 3 - 4 to the wheels of the axle with
better friction value.
A Torsen differential is also integrated into
the 01V 5-gear automatic gearbox, which
corresponds in terms of function to the
Torsen differential in the manual gearbox,
although its differs in design.
As the worm gears are positioned parallel to
the input / output, it is termed P
arallel Axis-
T
orsen, or PAT.
allroad quattro
241_058
Advantages of the Torsen differential:
• Greater comfort because the locking
power of the Torsen differential is
produced purely mechanically, is always in
use and responds continuously.
• Steering control is always guaranteed.
• As long as the friction values on the
wheels are adequate, the Torsen
differential operates completely
unnoticed.
• Error conditions do not occur because the
Torsen differential operates automatically.
• The Torsen differential is largely wear-free.
With the Torsen differential together and the
EDL electronic differential lock function on all
wheels (effective up to 100 km/h), the allroad
quattro remains mobile even if only one
wheel has traction. The design and function
of the EDL control is described in SSP 148
and 162.
Advantages of the EDL as opposed to fixed
locks:
• Full steering control is retained.
• Greater comfort as the EDL control is
activated automatically.
• Error conditions do not occur because the
system operates automatically.
The EDL function has been adapted for use in
the allroad quattro. Further information can
be found in the chapter entitled ESP -
influences, on Page 65.
Parallel Axis Torsen
The design and function of the Torsen
distributor differential can be found in
SSP 76.