Porsche 718 Spyder, Руководство пользователя

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Emission Control System
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Emission Control System
In the interest of clean air
Pollution of our environment has become a problem
that is of increasing concern to all of us.
We urge you to join us in our efforts for cleaner air in
controlling the pollutants emitted from the automo-
bile.
Porsche has developed an emission control system
that controls or reduces those parts of the emission
that can be harmful to our environment. Your Porsche
is equipped with such a system.
Porsche warrants the Emission Control System in
your new vehicle under the terms and conditions set
forth in the Warranty Booklet.
You, as the owner of the vehicle, have the responsi-
bility to provide regular maintenance service for the
vehicle and to keep a record of all maintenance work
performed. To facilitate record
keeping, have the service performed by authorized
Porsche dealers. They have Porsche trained techni-
cians and special tools to provide
fast and efficient service.
To assure efficient operation of the Emission
Control System:
e
Have your vehicle maintained properly and in
accordance with the recommendations described
in your Maintenance Booklet. Lack of proper
maintenance, as well as improper use of the
vehicle, will impair the function of the emission
control system and could lead to damage.
e
Do not alter or remove any component of the
emission control system.
e
Do not alter or remove any device, such as heat
shields, switches, ignition wires, valves, etc.,
which are designed to protect your vehicle's
emission control system. In addition to serious
engine damage, this can result in a fire if excess
raw fuel reaches the exhaust system.
e
Do not continue to operate your vehicle if you
detect engine misfire or other unusual operating
conditions.
How Emission Control Works
When an automobile engine is running, it uses energy
generated through the combustion of a mixture of air
and fuel. Depending on whether a vehicle is driven
fast or slowly or whether the engine is cold or hot,
some of the fuel (hydrocarbons) may not be burned
completely, but may be discharged into the engine
crankcase or exhaust system. Additonal hydrocar-
bons may enter the atmosphere through evaporation
of fuel from the fuel tank. These hydrocarbons (HC),
when released into the air, contribute to undesirable
pollution.
In addition, carbon monoxide (CO) and oxides of
nitrogen (NOx) contribute to engine emissions. They,
too, are formed during the combustion process and
discharged into the exhaust system.
To reduce these pollutants, your Porsche is equipped
with a precisely calibrated fuel injection system to
assure a finely balanced air/fuel mixture under all
operating conditions.
Oxygen sensor
The oxygen sensor, installed in the exhaust pipe
continuously senses the oxygen content of the
exhaust and signals the information to an electronic
control panel. The control panel corrects the air/fuel
ratio, so the engine always receives an accurately
metered air/fuel mixture.
Crankcase ventilation
Through crankcase ventilation, undesirable
emissions from the engine crankcase are not
permitted to reach the outside atmosphere. These
emissions are recirculated from the crankcase to the
air intake system. From here the emissions mix with
the intake air and are later burned in the engine.
Catalytic converters
The catalytic converters are efficient “clean-up”
devices built into the exhaust system of the vehicle.
The catalytic converters burn the undesirable pollut-
ants in the exhaust gas before it is released into the
atmosphere.
The exclusive use of unleaded fuel is critically impor-
tant for the life of the catalytic converters. There-
fore, only unleaded fuel must be used.
The catalytic converters will be damaged by:
– Push or tow starting the vehicle,
– Misfiring of the engine,
– Turning off the ignition while the vehicle is
moving,
– Driving until the fuel tank is completely empty,
– By other unusual operating conditions.
e
Do not continue to operate your vehicle under
these conditions, since raw fuel might reach the
catalytic converters. This could result in
overheating of the converters. Federal law
prohibits use of leaded fuel in this vehicle.
21_718_GT4_Spyder_BAL_21_WKD 982 02 21 21_KW36.20-24.21_en_US.book Seite 94 Freitag, 24. Juli 2020 11:31 11