Porsche Cayenne I 1 owners manual page 264

text version of content this owner's manual page from owners manual to the vehicle Porsche Cayenne, year of production 2002 - 2010:

10_Cayenne_21_KW17.book Seite 264 Donnerstag, 9. April 2009 3:33 15 Parking How Emission Control Works Oxygen sensor Danger! When an automobile engine is running, it uses The oxygen sensor, installed in the exhaust pipe Danger of fire resulting in serious personal energy generated through the combustion of a continuously senses the oxygen content of the ex- injury or death. mixture of air and fuel. Depending on whether a haust and signals the information to an electronic car is driven fast or slowly or whether the engine control unit. The control unit corrects the air/fuel f Do not park or operate the vehicle in areas is cold or hot, some of the fuel (hydrocarbons) ratio, so the engine always receives an accurately where the hot exhaust system may come in may not be burned completely, but may be metered air/fuel mixture. contact with dry grass, brush, fuel spill or discharged into the engine crankcase or exhaust other flammable material. system. Additonal hydrocarbons may enter the Crankcase ventilation f If your car catches on fire for any reason, call atmosphere through evaporation of fuel from the the fire department. Do not endanger your life fuel tank. These hydrocarbons (HC), when Through crankcase ventilation, undesirable by attempting to put out the fire.released into the air, contribute to undesirable emissions from the engine crankcase are not per- pollution. mitted to reach the outside atmosphere. These In addition, carbon monoxide (CO) and oxides of emissions are recirculated from the crankcase to Undercoating nitrogen (NOx) contribute to engine emissions. the air intake system. From here the emissions They, too, are formed during the combustion mix with the intake air and are later burned in the Danger! process and discharged into the exhaust system.engine. Danger of fire resulting in serious personal To reduce these pollutants, your Porsche is Catalytic converters injury or death. equipped with a precisely calibrated fuel injection f Do not apply additional undercoating or rust-system to assure a finely balanced air/fuel mixture The catalytic converters are efficient “clean-up” proofing on or near the exhaust manifold, under all operating conditions.devices built into the exhaust system of the exhaust pipes, catalytic converters or heat vehicle. The catalytic converters burn the shields. During driving the substance used for undesirable pollutants in the exhaust gas before it undercoating could overheat and ignite. is released into the atmosphere. The exclusive use of unleaded fuel is critical- ly important for the life of the catalytic con- verters. Therefore, only unleaded fuel must be used. 264 Maintenance and Car Care

owners manual Porsche Cayenne

owners manual Porsche Cayenne - year of production: 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010 - Porsche Cayenne I 1 owners manual EN