ALUSIL ® -Cylinder Blocks Porsche V6/V8 - KSPG AG

For absolute high-performance engines, Audi applies full
heat treatment (T6) comprising homogenizing, chilling and
artificial aging. This method contributes to a further distinct
improvement in terms of static and dynamic strength. As the
T6 heat treatment without specific artificial ageing only contributes
little to volume stabilisation, but implies the risk of
distortion in engine operation, the artificial ageing process
is stretched in the T7 heat treatment mode, thus increasing
extension.
4. Audi’s V-engine generation
The V-engine generation of Audi – both petrol and diesel
engines – is setting standards with respect to compactness
and overall length. Customers’ requests for more powerful
engines even in smaller vehicle model series implied the
need for shorter overall engine lengths and for reducing the
vehicle front-part weight. As a result the current V-engine
generation has been created.
6
Audi is the market leader in lightweight design, specifically
in the premium segment. The lightweight strategy is impressively
implemented in the car body through the Audi space
frame aluminium technology. It was a logical consequence
therefore to rely on a weight-optimizing all-aluminium solution
for the petrol V engines – i.e. ALUSIL ® cylinder blocks.
5. The Audi V6, V8 and V10 gasoline engine concept
The V6 in the large displacement version of 3.2 l, the V8 with
a swept volume of 4.2 l as well as V10 of 5.2 l swept volume
originate from the current Audi-V engine family with a stroke
of 92.8 mm (Fig. 9a and 9b ), a V angle of the cylinder banks
of 90° and a central division of the cylinder block (bedplate
concept). The distance between cylinders is 90 mm, the cylinder
bank offset being 18.5 mm. For the V6 of 3.2 l swept
volume, the V8 of 4.2 l and the V10 of 5.2 l displacement,
the cylinder bore is 84.5 mm. It is 81 mm in the case of the
Fig. 7: View of a water-jacket core box in the core shooter: water-jacket sand cores for Audi V6 cylinder block (left) and V8 cylinder block
(right)