Page 9:2 Emission controls

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Catalytic converter This is a supplementary device in the exhaust system, designed to clean exhaust gases This divice is mainly a container with a ceramic material insert. designed to let the ex- haust gases pass through channels in the insert. The channel walls are covered by metals act as catalysts, permitting a chemical change to occur without actually taking part in it. the emission (CO, HC, NOX) content will in- crease if the catalytic converter is damaged.

CAUTION! Vehicles with a catalytic converter must use unleaded fuel only. Otherwise the catalytic converter will become in- effective. See "Fuel Requirements".

Lambda-sond (oxygen sensor) system this is an emission control system designes to reduce emissions and improve fuel economy. An oxygen sensor monitirs the composition of the exhaust gases leaving the engine. The exhaust gas analysis is fed into an electronic unit which continually influences the injectors. This adjusts the air-fuel ratio to provide opti- mum conditions for combustion and efficient reduction of the three major pollutants (hydro- carbons, carbon monoxide and nitrous gases) by a 3-way catalytic converter.

text en picture's from Owners manual Model year 1990

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