Volkswagen Golf TDI Hybrid
Volkswagen Press Release - 6/March/2008
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 Volkswagen Golf TDI Hybrid
 Volkswagen Golf TDI Hybrid
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Geneva, Switzerland — The challenge: to create a viable, highly-efficient family vehicle capable of emitting less than 90g/km of CO2. The
Volkswagen engineers’ solution, unveiled on the eve of the Geneva
Motor Show, combines an advanced diesel engine with an electric motor
and the very latest generation of seven-speed DSG gearbox. The
so-called Golf TDI Hybrid concept vehicle is capable of achieving 83mpg
(3.4L/100km) on the combined cycle and emitting just 89g/km of CO2
– while around town the vehicle reverts to purely electric mode
to be emission-free.
At the core of the new Golf TDI Hybrid is a
highly-efficient 1.2-litre 3-cylinder common rail TDI diesel engine
developing 75PS (55kW) and 132 lbs ft (179Nm) of torque. Working
either in tandem with the diesel engine or, if required, on its own, is
an electric motor developing 27PS (20kW) and 103 lbs ft (140Nm) of
torque. The electric motor also replaces the conventional starter
motor and alternator to save weight and improve packaging.
It
can also operate as a generator, recovering kinetic energy from the car
during braking to charge the 220 volt, 45kg nickel metal hydride
battery which has a capacity of 1.4 kW hours.
In practice the
electric motor powers the vehicle from standstill with the diesel
engine only engaging should additional acceleration be required or at
higher speeds. In these situations the diesel engine takes over
with the electric motor only working if required to supplement the
combustion engine – for example, during overtaking
manoeuvres. When at a standstill the diesel engine shuts
down completely to conserve fuel and increase efficiency. The energy
split is relayed to the driver and passengers through a graphic display
accessed through the touchscreen satellite navigation screen.
Drive
on the concept car is channelled through the new seven-speed DSG
twin-clutch gearbox. This features a pair of dry clutches as
opposed to the wet clutches and sets a new energy efficiency standard
for automatic gearboxes.
Visual changes which differentiate the
Golf TDI Hybrid include a new, unique grille design, smaller front air
intakes to reduce aerodynamic drag and subtle ‘TDI-Hybrid’
badging. The Golf TDI Hybrid also sits lower than the
standard Golf on revised suspension and adopts the front splitter from
the Golf GTI Edition 30 to help further reduce aerodynamic drag. A
unique interior further distinguishes the Golf TDI Hybrid from the
conventional vehicle.
The Golf TDI Hybrid is currently a concept vehicle, but a version of this vehicle is likely to go into production in the future.
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