汽车排放控制系统的检修（Maintenance of automobile emission control system）.docVIP

汽车排放控制系统的检修（Maintenance of automobile emission control system） The pollutants discharged from gasoline vehicles mainly come from three aspects: exhaust, crankcase channeling and fuel evaporation. The positive crankcase ventilation system can solve the pollution caused by the crankcase gas, fuel evaporative pollutants can be used to fuel evaporation control system to solve, but the exhaust pollutants due to many factors involved, it is most difficult to control. Hazards of pollutants emitted by automobiles Not long ago, Daily News published the first edition of science and Technology Abstract automobile exhaust particles can make people lost two years. The information comes from the November 29, 2004 meeting of representatives of the parties to the Convention on long range transboundary air pollution. At the meeting, Markus Aman, a scientist at the International Institute for applied systems analysis, pointed out that the floating particles produced by burning fossil fuels were very detrimental to human health. The particles are tiny and less than 400 nanometers in diameter, but they can shorten the life expectancy of Europeans about 8 months, Oman said. In some European industrialized countries, such as Belgium, Holland, Luxemburg and Northern Italy, people are more polluted. It is expected that life expectancy in these places will be reduced by two years. Air pollution is closely related to automobile exhaust emissions. This is due to the current mainstream automotive power source is still fossil fuel - oil. The gasoline and diesel oil obtained from the processing oil are burned in the automobile engine, and the chemical energy of the steam and the diesel oil is converted into mechanical energy, and the running of the automobile is promoted, and the quick walk of the human expectation is realized. In automobiles, however, emissions from burning gasoline and diesel fuel have created ozone holes, acid rain and greenhouse effects in todays global atmospheric pollution