| BMW has unveiled two concept models –
the BMW Concept Z4 Coupé and the BMW Concept X3 EfficientDynamics
hybrid – at the IAA in Frankfurt, giving an insight into two distinctly
different styles of future motoring.
The Z4 Coupé concept
was inveiled at the 2005 Frankfurt Motor Show |
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The striking new BMW Concept Z4 Coupé could be the inspiration
for a new, dynamic Z4 model and harks back to the rare and respected Z3
Coupé of the ’90s. Powered by BMW’s new magnesium-alloy
3.0-litre engine developing 265hp and 315Nm of torque, its engine would
power a production model of the Concept Z4 Coupé from zero to 62mph
in approximately 5.7 seconds and on to a limited top speed of 155mph.
The Concept Z4 Coupé carries over much of the technology already
seen in the Z4 roadster, such as Electric Power Steering and DSC stability
control. The Coupé also clearly takes much of its styling from
the acclaimed BMW Z4 roadster. Using the roadster’s chassis as a
strong and rigid basis, the Concept Z4 Coupé benefits from an additional
hardtop and large hatch-style boot lid to provide the highest levels of
body stiffness. Finished in silk-matt Glacier Silver paintwork, Nubuck
leather interior and sitting on dramatically styled 19-inch smoke-finished
alloy wheels, the BMW Concept Z4 Coupé was ‘Frankfurt’s
show stopper’, according to one weekly motoring magazine.
In his speech at the IAA, Frankfurt, Chairman of the Board of Management
of BMW, Dr Helmut Panke confirmed a production version of the Concept
Z4 Coupé would be built in the foreseeable future.
BMW also showcased hybrid technology at the IAA, Frankfurt, with the BMW
X3 EfficientDynamics hybrid car. Using new innovations such as Super Cap
technology, Active Transmission, automatic engine start / stop, High Precision
Injection and Brake Energy Regeneration, the Concept X3 EfficientDynamics
achieves an increase in performance whilst improving on the combined fuel
consumption by up to 20 per cent over the standard X3.
Whenever the driver applies the brakes and slows to a standstill, the
petrol engine is switched off, negating fuel consumption and emissions.
At the same time, the electric motor is converted into an alternator,
recharging the power supply. When the accelerator is depressed, the engine
restarts automatically.
If the driver continues to apply the accelerator, the 400Nm electric motor
starts automatically to deliver a maximum output of 82bhp. Under moderate
acceleration, the system uses only the electric motor to minimise consumption
and emissions. At maximum acceleration the output of the electric motor
and combustion engine combine to deliver up to 600Nm of torque but with
engine speeds below 1,500rpm. When not in use powering the car, the electric
motor again automatically switches to alternator mode to recharge the
power supply.
Power storage and supply comes from innovative double-layer capacitors
or Super Caps, located in the vehicle sills. Offering over 10 times more
capacity per kilogram than conventional nickel / metal hydride batteries,
Super Caps have an overall capacity of 190kW – more than adequate
for the car being driven in fast, dynamic situations.
Finally, the Concept X3 EfficientDynamics combines BMW’s now familiar
VALVETRONIC throttle with High Precision Injection technology –
the first jet-guided direct injection system for large-scale production.
This further contributes towards the dramatic reduction in fuel consumption.
High Precision Injection technology is likely to follow VALVETRONIC into
full-scale production within the next few years.
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