Self-Study Program

18
Audi-Space-Frame – ASF
®
Components
Multi-functional large cast parts with
function-optimised wall thickness and
weight, plus optimised component structure.
As well as having very good strength
properties, vacuum die-cast parts also display
very good deformation characteristics, and
they are predominantly used in crash-relevant
areas of the structure, for example in the
longitudinal members 2, the suspension strut
holders and A- and B-pillars.
Designing the longitudinal member 2 as a
vacuum die-cast part has various advantages
over conventional manufacturing techniques:
- The wall thickness distribution and the
rib structure determined in accordance
with structural calculations ensure that
the two half shells of the longitudinal
members have a pre-defined
deformation response.
- The points at which the front axle is
bolted to the subshells have been
constructed to deflect the deformation
energy into the longitudinal members
instead of the rigid subframe.
- Through integration of the gearbox and
engine mounting attachments, the
subframe attachment, the insert for the
trolley jack and the suspension gear
mounting points, these two cast half
shells form a large multi-functional cast
component.
- As well as weight savings this has also
led to a reduction in the number of parts.
Front end
The complete front end is then formed from
this longitudinal member structure by adding
an additional large cast part (the suspension
strut holder), the front bulkhead, the pedal
cross piece and the front wheel housings.
SSP239_019
SSP239_097
SSP239_040
Bolted longitudinal member