BMW 2001 Annual Report Download - page 135
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17
conditions to a message centre, where data is compared
with information from other subscribers, processed and
transmitted immediately through the cars telephone to the
navigation system in each BMW. A particularly interesting
point is that through Floating Car Data BMW cars also
provide information on country roads and built-up areas,
describing and monitoring the flow of traffic which means
that the dynamic route guidance system is no longer con-
fined to the motorway alone. BMW drivers therefore help to
significantly improve dynamic route guidance, serving to
avoid traffic congestion and making an important contribu-
tion to mobility on our roads.
More power, less fuel. A milestone in the history of the com-
bustion engine entered series production in June 2001:
the first petrol engine not requiring a throttle butterfly. This
is made possible by fully variable valve lift, the innovative
VALVETRONIC system. The bottom line is more power on
less fuel, lower exhaust emissions, a better engine response
and greater refinement.
The best way to describe VALVETRONIC is to compare
the system with the way we human beings breathe: under
physical strain, the human being inhales and exhales in a
long and deep breathing process. When we need less air,
on the other hand, we do not cut back our air supply by
simply placing our hand on our mouth or nose, but rather
breathe in a shorter and flatter process. Applying this to
VALVETRONIC, it means that instead of obstructing the
engines process of free ventilation by means of a throttle
butterfly, the intake valves are controlled with infinite pre-
cision supplying the engine with either more or less air,
depending on driving conditions and requirements.
All four-cylinder petrol engines in the BMW 3 Series
already incorporate VALVETRONIC, and this new tech-
nology is also featured in the two 8-cylinder power units of
the new BMW 7 Series. In the year 2002 it will follow in the
12-cylinder engine.The
BMW
Group is therefore consistently
applying its philosophy to offer the best technology avail-
able as quickly as possible in all models worldwide. This is
leadership in technology to the benefit of the customer.