owners manual Alfa Romeo 156

owners manual Alfa Romeo 156 - year of production: 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006 - Alfa Romeo 156 owners manual EN

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text version of content this owner's manual page from owners manual to the vehicle Alfa Romeo 156, year of production 1997 - 2006:

EMISSION REDUCING DEVICES Lambda probe EMISSION REDUCING DEVICES (petrol engines) (JTD engines ) A sensor (lambda probe) measures the content of oxygen present in the exhaust Trivalent catalytic convertergas. The signal transmitted by the lambdaOxidising catalytic converter (catalytic silencer) probe is use by the injection and ignition Converts the polluting substances present electronic control unit to adjust the air-fuel The exhaust system is fitted with a cat- in the exhaust gases (carbon monoxide, un- alyzer formed of alloys of noble metals. Itmixture. burned hydrocarbons and particulate) into is housed in a stainless steel container which harmless substances, thus reducing the is able to resist the high operating temper- fumes and smell that are typical of diesel atures. Anti-evaporation system engines. The catalyzer converts the unburnt hydro-As it is impossible, even when the engineThe catalytic converter consists of a stain- carbons, carbon monoxide and nitrogen ox-is switched off, to prevent the formation ofless steel case that houses a ceramic hon- ides present in the exhaust gas (even if in eycomb body coated with noble metal used GETTING TO KNOW YOUR CAR fuel vapours, a system has been devised small quantities thanks to the electronic in-which imprisons the vapours in a special ac-as a catalyst. jection and ignition system) into harmlesstivated carbon container. compounds. Exhaust gas recirculation system During operation of the engine, these (E.G.R.) vapours are sucked up and sent to com- bustion. This system recycles, i.e. re-uses, a vary- ing percentage of the exhaust gases, de- pending on engine operating conditions. It is used, when necessary, to control ni- WARNING tric oxides. Due to the high tempera- tures reached during oper- ation of the catalytic converter, the vehicle should not be parked over inflammable materials (paper, fuel oils, grass, dry leaves, etc.). 188

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year of production from: 1997

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