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Catalytic converters
The purpose of the catalytic converters is to
purify exhaust gases. They are located close
to the engine so that operating temperature is
reached quickly.
The catalytic converters consist of a monolith
(ceramic or metal) with channels. The channel
walls are lined with a thin layer of platinum/
rhodium/palladium. These metals act as cata-
lysts, i.e. they participate in and accelerate a
chemical reaction without being used up
themselves.
Lambda-sond
TM
oxygen sensor
The Lambda-sond is part of a control system
intended to reduce emissions and improve
fuel economy. For more information, see Fuel
consumption and CO2 emissions (p. 422).
An oxygen sensor monitors the oxygen con-
tent of the exhaust gases leaving the engine.
This value is fed into an electronic system
that continuously controls the injectors. The
ratio of fuel to air directed to the engine is
continuously adjusted. These adjustments
create optimal conditions for efficient com-
bustion, and together with the three-way cat-
alytic converter reduce harmful emissions
(hydrocarbons, carbon monoxide and nitrous
oxides).
Related information
•
Economical driving (p. 311)
•
Fuel - petrol (p. 307)
•
Fuel - diesel (p. 307)
08 Starting and driving
Fuel - bioethanol E85
Bioetanol E85 is used as the fuel for the car's
engine.
Do not modify the fuel system or its compo-
nents, and do not replace components with
parts that are not specifically designed for
use with bioethanol.
WARNING
Methanol must not be used. A decal on
the inside of the fuel filler flap shows the
correct alternative fuel.
The use of components not designed for
bioethanol engines could cause fire, injury
or engine damage.
Reserve fuel can
IMPORTANT
Statutory provisions relating to storage of
reserve fuel cans in cars vary from country
to country. Check what does apply.
The reserve fuel can should be filled with pet-
rol. For more information, see Starting the
engine – Flexifuel (p. 273).
IMPORTANT
Make sure the reserve fuel can is securely
fastened and that its cap is sealed.
08
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