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GETTING TO KNOW YOUR CAR
174
EMISSION REDUCING DEVICES
Trivalent catalytic converter
(catalytic silencer)
The exhaust system is fitted with a cata-
lyst formed of alloys of precious metals; it
is housed in a stainless steel container which
is able to withstand the high operating tem-
peratures.
The catalyst converts the unburnt hydro-
carbons, carbon monoxide and nitric oxide
in the exhaust gas (even in minimal quan-
tity owing to the electronic ignition and in-
jection systems) into non polluting com-
pounds.
Lambda sensors
Lambda sensors measure the content of
oxygen present in the exhaust gas. The sig-
nal transmitted by the Lambda sensors is
used by the injection and ignition electron-
ic control unit to adjust the air - fuel mixture.
Anti-evaporation system
As it is impossible, even when the engine
is switched off, to prevent the formation of
fuel vapours, a system has been devised
which traps the vapours in a special acti-
vated carbon container.
When the engine is running these vapours
are withdrawn and sent to combustion.
ENVIRONMENTAL
PROTECTION
The design and construction of the vehi-
cle have not only been developed with the
traditional aspects of performance and safe-
ty in mind, but also take into account the in-
creasingly pressing problems tied to pro-
tecting the environment.
The choice of materials, techniques and
particular parts are the result of work which
has made it possible to drastically reduce
the harmful effects on the environment and
guarantee compliance with the most strin-
gent international regulations.
USE OF NON-TOXIC
MATERIALS
None of the components of the vehicle con-
tain asbestos. The padding and the climate
control system do not contain CFCs which
are held responsible for the destruction of
the ozone layer.
The colouring agents and the corrosion in-
hibitors used on the nuts, screws and bolts
do not contain cadmium or chrome which
could pollute the atmosphere or water tables.
Due to the high tempera-
tures reached during oper-
ation of the catalytic silencer the
vehicle should not be parked over
inflammable materials (paper, fu-
el oils, grass, dry leaves etc.).
WARNING
Summary of Contents for Alfa 147 GTA
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