Intelligence for All Wheel Drive - Haldex

�Expertise
“ From a technical point of view, it would be no problem to make
today’s sliding caliper brakes fit for such fierce forces. But due to the
required reinforcements, the result would be a roly-poly that would
be difficult to incorporate in the available installation space.”
� Five ingeniously positioned springs ensure
that the disc virtually floats on the wheel end.
The technicians used all their wiles when it
came to the attachment of the brake: The disc
is positioned on the toothwork of the integrated
hub, interlocked. Here fi ve ingeniously designed
springs permit lateral displacement, to ensure
wear compensation and clearance. They also
ensure that the contact between hub and disc
does not become too close as to avoid excessive
heat dissipation in the hub: The disc virtually
fl oats on the hub and, as a consequence, noise
development is exemplarily low. The fact that
the thermal stress on the hub is kept as low as
possible is vital for long hub life and at the same
time means less strain on the tyres.
ANOTHER ADVANTAGE of this ensemble is
that the pads can be easily replaced from overhead
without having to dismount the wheel
fl ange or other components.
Both the dual disc and the triple brake pads
are being developed to last some 500,000 kilometres
or more. So the replacement of pads and
discs coincide and, the brake maintenance time
for a trailer is now about six hours.
Fitted with the new hub and offering today’s
usual clamping force, “the skf-Haldex wheel end
weighs about 15 percent less than current conventional
solutions,” emphasizes Andreas Richter,
Vice President Marketing of Haldex Brake
14 Haldex Dynamix 1/2007 www.haldex.com