【導(dǎo)讀】致尾氣污染問題日益突顯。我國相關(guān)部門采取了措施，并收到了一定的成效，但是要從根。在我國走向工業(yè)化、城市化、現(xiàn)代化的進(jìn)程中，環(huán)境治理問題日益成為我們必須面對(duì)。發(fā)達(dá)國家在發(fā)展過程中曾經(jīng)遇到的環(huán)境惡化問題在中國初露端倪，尤其是在。體健康，也危害了當(dāng)?shù)乜沙掷m(xù)發(fā)展的能力。市環(huán)境空氣質(zhì)量和人們身體健康具有重大而現(xiàn)實(shí)的意義。在汽車尾氣中，除了兩種最終氧。體；空氣和燃料的混合比（空燃比），是影響汽車尾氣污染物含量的最基本因素。氣凈化概括為機(jī)內(nèi)凈化與機(jī)外凈化兩大類。與環(huán)境的危害和汽車尾氣的控制措施。并對(duì)當(dāng)前汽車尾氣治理主要技術(shù)對(duì)策進(jìn)行介紹。

　　

【正文】 。s automobile industry has been developing rapidly since the year 2020. In 2020, million motor vehicles were manufactured in China, surpassing Japan as the largest automobile maker. Moreover, with total sales of million, China became the largest automobile market in the world for the full year 2020, overtaking Unites States. The top eight Automotive industry 3 car sellers for the first nine months of 2020 are General Motors, Volkswagen, Hyundai, China, Nissan, Cherry, BYD and Toyota. Germany Main article: Automotive industry in Germany The petrol engine automobile was invented in Germany by Karl Benz. Furthermore, the fourstroke internal bustion engine used in most automobiles worldwide today was invented by Nikolas Otto in Germany. In addition, the diesel engine was also invented by German Rudolf Diesel. Germany is famous for the highperformance and highquality sports cars made by Porsche, and the cars of Mercedes, Audi and BMW are famous for their quality and technological innovation. DaimlerBenz39。s predecessor DaimlerMotorenGesellschaft was the industry39。s oldest firm, DaimlerBenz Company dates from 1926. In 1998, it bought the American automobile manufacturer Chrysler, and then sold out in 2020 at a heavy loss, as it never managed to bring the division to long term profitability. In the popular market, Opel and Volkswagen are most well known. Opel was a bicycle pany that started making cars in 1898。 General Motors bought it out in 1929, but the Nazi government took control, and GM wrote off its entire investment. In 1948, GM returned and restored the Opel brand. Volkswagen is dominant in the popular market。 it purchased Audi in 1964, which eventually lead to the formation of today’s39。 Volkswagen Group. Volkswagen39。s most famous car was the small, beetleshaped economical people39。s car, with a rearmounted, aircooled engine. It was designed in the 1930s by Ferdinand Porsche upon orders from Adolf Hitler, who was himself a car enthusiast. However, production models only appeared after the war。 until then, only rich Germans had automobiles. By 1950, Volkswagen was the largest German automobile producer. Today, the Group is one of the three biggest automotive panies in the world, and the largest in Europe。 and is now partowned by Porsche Automobile Holding SE. In the meantime, ten different car manufacturers belong to the multicorporate enterprise: Porsche AG, Volkswagen, Audi AG, Beatty Automobiles SAS, Automobile Lambhini ., Bentley Motors Limited, Skoda Auto, SEAT, ., along with truck makers MAN AG and Scandia AB. Germany is famous for its upscale saloons. They feature advanced suspension systems that provide both a soft ride, and good handling characteristics. Many manufacturers limit their automobiles electronically to driving speeds of 250 kilometers per hour (155 mph) for safety reasons. For factorytuned models like MercedesAMG from Mercedes Benz, Audi RS from Quattro GmbH, and BMW M from BMW M GmbH, for an additional payment, it is possible to derestrict their top speed, so that the fastest models easily reach more than 300 kilometers per hour (186 mph). Automotive industry 4 India Main article: Automotive industry in India An embryonic automotive industry started in India in the 1940s. However, for the next 50 years, the growth of the industry was hobbled by the Socialist policies and the bureaucratic hurdles of the license raj. Following economic liberalization in India from 1991, and the gradual easing of restrictions on industry, India has seen a dynamic 17% annual growth in automobile production and 30% annual growth in exports of automotive ponents and automobiles. India produces around 2 million automobiles currently. The Largest automotive panies in India are Marti Suzuki, Hyundai Motor India, Tata Motors and Mahindra amp。 Mahindra. Total turnover of the Indian automobile industry is expected to grow from USD 34 Billion in 2020 to USD 122 Billion in 2020. Tata Motors has just launched Tata Nano, the cheapest car in the world at USD 2200. Recently India has overtaken China in global auto exports of pact car this year. Suzuki Motor Corp, Hyundai Motor Co, and Nissan Motor Co are making India a manufacturing hub of minicars. Italy Main article: Automotive industry in Italy The automotive industry in Italy began with the construction of the first FIAT plant (Fabbrica Italian Automobile Torino) in 1899 by Giovanni Angell. In the following years at least 50 other manufacturers appeared, the best known being Isotta Fraschini in 1900, Lancia in 1906, Alfa Romeo in 1910, Maserati in 1914, Ferrari in 1939, and Lambhini in 1963. During the first and the second World Wars and the economic crisis of the 7039。s, many of these brands disappeared or were bought by Fiat or foreign manufacturers. Today the Italian automotive industry boasts a wide range of products, from very pact city cars to sport supercars such as Ferrari and Maserati. As of June 2020 Fiat also holds roughly 20% stake in the American brand Chrysler. Japan Main article: Automotive industry in Japan Japan, with its large population squeezed into very high density cities with good public transit, has limited roadways that carry very heavy traffic. Hence, most automobiles are small in terms of size and weight. From a humble beginning, Japan is now the biggest auto manufacturing country in the world. Nissan began making trucks in 1914, and sold cars under the Dotson brand until it switched to Nissan in the 1980s. It opened its first . plant in Tennessee in the early 1980s and a . plant in 1986. In the North American markets, its luxury models carry the brand Infiniti. Honda, which began with motorcycles, emerged after World War II. In the North American markets, its luxury vehicles are sold under the Acura brand. Toyota began making cars in the 1930s, and is no