Vehicle emissions control
Exhaust filter is the generic term for various systems, the exhaust gases of motor vehicles, factory chimneys, power plants and similar based combustion devices filter. Here are toxic chemical compounds are completely absorbed and reduces harmful to an acceptable level within clearly defined standards.
In industrial plants different filter devices are used, depending on what caused the form of toxic or harmful substances. The still released into the air particles are eliminated by means of exhaust gas purification method. A special form of exhaust gases, the flue gases, in this case, the procedures of flue gas cleaning application.
Historical outline of the exhaust filter development
In a gasoline engine, the catalyst was introduced disseminated around 1985, but which is no filter in the strict sense. It filters different toxic substances such as nitrogen oxides and carbon monoxide is not out, but converts it into less harmful or harmless compounds, such as nitrogen and carbon dioxide. They are discharged with the exhaust gas to the environment. The diesel engine in 2006 Soot particle filter have been introduced to the soot particles that result from the combustion of the fuel filter from the exhaust gas a year. In Germany environmental zones have been established in some regions. Trucks run with Euro emissions standard, which limits the emission of pollutants into the air for several years. Currently, the Euro 4 emissions standard is the worst just yet approved by the European Union, and the new Euro -6 the best (as of March 2011)