BMW 2004 Annual Report Download - page 180

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50 Technical developments
Seven-speed SMG transmission
The new seven-speed SMG transmission offers the
driver eleven gearshift options: from comfortable
cruising with automatic gear selection to very quick
gearshifts achieved using paddles on the steering
wheel for extremely sporty driving. Gearshift is executed
almost without any interruption in the flow of power
and is much faster than even an experienced driver
could ever manage.The system also features Launch
Control, a programme for maximum acceleration in-
spired by Formula 1.
Second-generation ActiveSteering
ActiveSteering alters the steering ratio according to
driving situation requirements. When manoeuvring
slowly, the driver barely needs to rotate the steering
wheel for the wheels to turn lock-to-lock. At higher
speeds, driving is safer as a result of an increasingly
indirect ratio.
ActiveSteering’s second generation offers an ad-
ditional function. Previously, when applying the brakes
on surfaces with differing grip levels on the right and
left, the driver had to countersteer to keep the vehicle
on course. By actively intervening in the steering con-
trol the second generation of ActiveSteering auto-
matically stabilises the vehicle; the braking distance is
also shortened. The result: more comfort and safety.
xDrive all-wheel-drive system --1
Conventional all-wheel drive systems will not react
unless one of the wheels is spinning. By contrast,
xDrive acts well before the wheels begin to lose their
grip. Within fractions of a second, an electronically
controlled multi-plate clutch shifts the power between
the front and rear axle. xDrive relies on data such as
the yaw rate or steering angle, which are continuously
monitored by Dynamic Stability Control (DSC). Based
on this data, xDrive offers both sporty driving behaviour
and optimum traction.
MINI Convertible soft top system --2
The MINI Convertible is the only one of its kind world-
wide to allow the front section of the soft top to be
opened and closed at the press of a button while
motoring – like a sunroof. Opening the fully automatic
soft top all the way takes no more than 15 seconds.
In addition, when the top is open, it can be lifted up,
making the trunk easily accessible not only through
the horizontal tailgate but also from above.
--1