le 4 future piattoforme VAG.

[tete]

ma dico cosa interessa che le bentley abbiano piattaforme comuni tra A4, A6... se hanno buone qualità... perche non sfruttarle... sono tutte pippe mentali..ben vengano le piattaforme comuni..

[simonepietro]

Scritto da tete

ma dico cosa interessa che le bentley abbiano piattaforme comuni tra A4, A6... se hanno buone qualità... perche non sfruttarle... sono tutte pippe mentali..ben vengano le piattaforme comuni..

dipende da come viene gestita la cosa.
non creiamo mostri del genere, vedi sotto

[simonepietro]

problemi, a dopo

[simonepietro]

Probabilmente il Testo da dove sono state tratte alcune notizie , vedere i messaggi precedenti, a riguardo della piattaforma MQB
Datato 2007

“We’re creating modular design
systems,” says Dr Ulrich
Hackenberg, Volkswagen’s
executive board member for
development. “Our aim is to
produce more than 10 million cars by 2018 as a group,
with more than six millions comuing from VW brand "
This a ambitious- VW sold 3,7 million cars worldwide
in 2007. Western europe is stagnant, so growth will
have to come from emerging market. The GOLF sells
everywhere bur the firm recognises that it needs
a wider range, with more SUVs, vans aand pickups, while
keeping costs down.
"We need base technologies"says Hackenberg. These have
to be specifically standardies to create chassis
flexible enough for various vehicle concepts with
different hats"


Hackenberg should be good at
this: he was in charge of VW’s
body development division from
1998 to 2002, and held the same
position at Audi. Since 2004, he’s
been responsible for VW Group’s
module strategy.
In future, every VW from the
B-segment Polo to the D-
segment Passat will be based on
the firm’ “modular transverse matrix platform",
wich will underpin 43 group models in the next five years

Audi is already using its own modular longitudinal platform
as the basis for the A5 COUPE,A4 sedan and Q5 crossover
The Golf about to enter its sixth generation,will
always be VW's most important model.It defines Europe
C-segment. " The Golf will always be the centre of our
brand and shows the basis for our modular system and
platform", says Hackenberg.
“After the Golf we'll will bring the technology into
other cars- driver assistance features,start/stop
and brake energy regenaration will be based around the Golf.”
The current Golf has electrically power-assisted
steering (ePAS) enabling Valeo's parking aid system
to be offered in the Touran- drivers controlthe brake and
accelerator only while parallel parking. VW is developing other
functions around ePAS to make vehicles more autonomus,
such as a lane-keeping system that will use self-correcting
steering inputs.
Some competing system only provide haptic warning
when the car leaves the lane.
“The system also gives the
driver information because we’re
not relieving them of any
responsibility – their hands must
stay on the wheel,” says
Hackenberg. “But the car can
steer itself with 3Nm of torque.”

The system could also
compensate when a car on the
autobahn is hit by a side wind.
Fully self-parking vehicles could
follow. Throttles are already by-
wire; brake-by-wire and fully
redundant safety sensors and
software would complete the
system requirements.

Weight reduction is important
too. VW is looking for a mixture
of materials such as high-strength
steels, aluminium, magnesium in
the interior, plastics and maybe
carbon-fibre composites.

A truly modular design strategy
could see magnesium
components such as instrument
panel castings used across every
vehicle in the group. Leveraging
volumes in the millions would
maximise weight savings for
minimum cost.

Body-in-white engineers would
probably want a mix of
aluminium and steel in the
platform for an ideal distribution
of weight and strength. Joining
dissimilar metals at high volumes
isn’t easy, though, and galvanic
corrosion is always a concern.
Platforms will probably remain
welded steel assemblies.

“Some materials you have to
bond but we’re also brazing
aluminium and steel,” says
Hackenberg. “But the joint must
be sealed – you can’t have any
porosity – and that’s a challenge.
We also have to look at different
temperature co-efficients,
especially in the paint shop.”

Brazing probably won’t make it
in the Golf because volumes are
extremely high and brazing
speeds are too slow. It would be
better for joining body panels in
some of the specialist models that
VW has planned.

Better platforms, then, mean
greater uniformity in some areas
while enabling greater
differentiation in the areas that
really matter to consumers.VW
Group gets a wider range of
lighter, lower-emission cars at
reduced cost. Sounds like a plan.

tratto da Automotive Engineer