Engine46 | Dynamics
Direct fuel injection (DFI).
With millisecond precision, DFI injects
fuel at up to 200 bar directly into the
combustion chamber by means of
electromagnetically actuated injection
valves. The spray and cone angles have
been optimised for torque, power output,
fuel consumption and emissions by
enabling a homogeneous distribution of
the air/fuel mixture and, therefore,
effective combustion. DFI improves the
internal cooling of the combustion
chamber by having the mixture prepared
directly in the cylinder. This allows for a
higher compression ratio, which helps to
deliver greater power output at the same
time as enhanced engine efficiency.
Common-rail diesel injection system.
In the Macan S Diesel, fuel is directly
injected by a common-rail injection
system. The injection pressure of up to
2,000 bar ensures effective mixture
formation and enhanced dynamic
performance. Piezo-controlled injectors
enable a flexible injection process with multiple injections taking place per
stroke and delivering fuel in the exact
amounts required for smooth
combustion.
Thermal management.
Engine cooling is prevented during the
initial stages of a cold start so that the
engine reaches its optimum operating
temperature faster. This means it can
begin working at high efficiency sooner,
thereby consuming less fuel.
Active aerodynamics.
The radiator grille shut ter opens the
cooling air flaps only as needed.
Whenever the cooling requirement is low,
such as on relaxed drives, the radiator
grille shut ter closes. Aerodynamics are
improved, which helps to improve fuel
economy. If, for example, a sport y
driving st yle is adopted and the demand
for power increases, the cooling air flaps
will open and let in the necessary amount
of cooling air for increased driving
performance.
O il supp ly.
The integrated dry-sump lubrication of the
V6 petrol engines guarantees a reliable
supply of oil in all driving situations. The
oil reservoir is located directly inside the
engine, which saves on space and weight.
An electronically controlled oil pump
provides the correct amount of oil as and
when needed. Optimised for sport y
driving, it ensures optimum engine
lubrication even in extreme situations.
For fuel consumption, CO2 emissions and efficiency class, please refer to pages 126–127.
