The secret of performance?
Efficiency.
OBD II on-board diagnostics. The
key components, however, are the
primary and secondary catalytic
converters on the twin exhaust
tracts. Each catalyst has a rapid
warm-up cycle so emissions are
which the engine management
system uses to establish the
optimum air/fuel mix and monitor
the efficiency of the catalytic
converters.
standard as well as LEV2 – LEV
(Cayenne and Cayenne Turbo)
and LEV2 – ULEV (Cayenne S
and Cayenne GTS) regulations
in the United States. Whatever
the class, every Porsche
combines high performance
Exhaust emissions.
The Cayenne models are all
equipped with the very latest
emissions technologies. As a
result, they comply with both the
stringent EU4 exhaust emissions
with only moderate emissions.
On the Cayenne models, this is
achieved using an advanced
engine concept featuring direct
fuel injection, VarioCam Plus
(V8 engines) or variable valve
timing (V6 Cayenne) as well asreduced sooner when starting
from cold.
Another important feature is
the use of twin oxygen-sensor
circuits. Each bank of cylinders
has a separate control system
Environment
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