Audi V8 Manuel de service télécharger pdf (Page 19)

The rockers are made of die-cast aluminium

in order to keep inertia forces as low as

possible. As a result, the valvegear is able to

function reliably at engine speeds of up to

7200 rpm.

The use of roller rockers has not only meant a

considerable reduction in frictional losses in

the valvegear, but has also halved the oil

delivery rate in the cylinder heads. This also

has a positive effect on the degree of

efﬁciency.

Five-valve technology is now also being used

in the V8 engines.

Roller rockers are being used for the ﬁrst time

in the enhanced ﬁve-valve cylinder head.

This considerably reduces frictional losses in

the valvegear which, in turn, signiﬁcantly

improves efﬁciency.

SSP217_020

Cylinder head

Five-valve technology

1 2 ... 14 15 16 17 18 19 20 21 22 23 24 ... 51 52

Pas de commentaire

Audi V8 Manuel de service Page 19