Alfa Romeo 166 사용자 설명서

The lambda sensors detect the oxygen

content in the exhaust gas.

The signals transmitted by the Lambda

sensors are used by the electronic control
unit of the injection-ignition system to ad-
just the air-fuel mixture.

Anti-evaporation system
(only petrol versions)

As it is impossible, even when the en-

gine is switched off, to prevent the forma-
tion of fuel vapours, a system has been
devised which traps them in a special car-
bon container.

During operation of the engine these

vapours are withdrawn and sent to com-
bustion.

EMISSION REDUCING DEVICES
(diesel engines)

Converts the polluting substance in the

exhaust gases (carbon monoxide, un-
burnt hydrocarbons and particulate), thus
reducing the fumes and smell that are
typical of diesel engines.

The catalytic converter consists of a

stainless steel case that houses a ceramic
honeycomb coated with noble metal used
as a catalyst.

This system recycles, i.e. re-uses, a

varying percentage of the exhaust gases
depending on engine operating condi-
tions.

It is used, when necessary, to control ni-

tric oxides.