【正文】 凈化處理裝置是三元三效催化術(shù)的有效補(bǔ)充?，F(xiàn)代凈 化技術(shù)仍在提高催化劑的早期活性，提高催化劑的升溫特性，降低催化劑的活性溫度，提高催化劑性能，增加臭氧 (O3)技術(shù)，采用電加熱催化劑 (EHC)以及排氣燃燒器 (EGC)等方面，做更深入的研究。如未燃 HC 的吸附凈化，采用以沸泡石為主要成分，作為 HC 吸附劑，在催化劑活化前吸附 HC，是排氣凈化技主活性成分有 Ag 、Sn 、 Co、 In 或 Ga 的氧化物和以貴金屬催化劑的主活性成分為 Pt 或 Pd ，以及 La 、 Y 或Zr 的氧化物等的運(yùn)用，以及納米技術(shù)的運(yùn)用，使凈化指標(biāo)和性能達(dá)到了更高標(biāo) 準(zhǔn)。相信只要人人從自我做起，從今天做起，樹(shù)立環(huán)保意識(shí)，積極加入保護(hù)環(huán)境的行列，那么蔚藍(lán)的天空、清澈的河流將會(huì)再次展現(xiàn)在世人的面前。汽車(chē)尾氣的危害及治理 [J].城市問(wèn)題， 2020. [2] 朱根逸 .環(huán)境質(zhì)量標(biāo)準(zhǔn)總論 [M].北京 :中國(guó)標(biāo)準(zhǔn)出版社 , 1986. [3] 李宏實(shí)。健康文摘， 2020. [4] 曹磊。污染防治技術(shù)， 2020. [5] 劉業(yè)福，楊芳華。汽車(chē)尾氣及噪聲對(duì)人體健康的危害分析 [J]。汽油車(chē) CO 和 HC 排放濃度超標(biāo)的影響因數(shù)分析 [J]。北京。任老師在我學(xué)習(xí)的每一個(gè)階段都給予了關(guān)鍵性的、啟發(fā)性的和鼓勵(lì)性的指導(dǎo)，對(duì)我嚴(yán)格要求，不斷幫助我進(jìn)步，幫助我成長(zhǎng)，我所取得的每一點(diǎn)成績(jī)都是和導(dǎo)師的辛勤工作分不開(kāi)的。在此，我向?qū)熤乱灾孕牡闹x意。在此對(duì)論文寫(xiě)作期間給予我大力支持的家人和朋友致以衷心的謝意。s motor vehicles. In 2020, more than 70 million motor vehicles, including cars and mercial vehicles were produced worldwide. In 2020, a total of million new automobiles were sold worldwide: million in Europe, million in AsiaPacific, million in USA and Canada, million in Latin America, million in the Middle East and million in Africa. The markets in North America and Japan were stagnant, while those in South America and other parts of Asia grew strongly. Of the major markets, China, Russia, Brazil and India saw the most rapid growth. About 250 million vehicles are in use in the United States. Around the world, there were about 806 million cars and light trucks on the road in 2020。s fiftyone light vehicle plants are projected to permanently close in the ing years, with the loss of another 200,000 jobs in the sector, on top of the 560,000 jobs lost this decade. Combined with robust growth in China, in 2020, this resulted in China being the largest automobile producer and market in the world. Australia Main article: Automotive industry in Australia Australia first began to produce cars in 1897 with cars made by Tarrant Motor amp。 such as Fiat, Volkswagen Group, Ford, General Motors, Nissan, Toyota, MAN SE, Mitsubishi, MercedesBenz, Renault etc, and also the emerging national panies such as Trolled, Marco polo ., Argali, Random . among Automotive industry 2 others. The Brazilian industry in regulated by the Associa231。o National dos Fabricantes de Ve237。Automobiles (OICA), based in Paris. Canada Main article: Automotive industry in Canada Canada is currently the 11th largest auto producer in the world (as per 2020 statistics), down from 7th a few years ago. Brazil and Spain recently surpassed Canadian production for the first time ever. Canada39。s automotive industry had grown, by 1923, into the secondlargest in the world, although it was still made up of relatively inefficient plants producing many models behind a high tariff wall. High consumer prices and production inefficiencies characterized the Canadian auto industry prior to the signing of the 1965 Automotive Products Trade Agreement with the United States. The 1964 Automotive Products Trade Agreement or “Auto Pact” represents the single most important factor in making the Canadian automotive industry what it is today: a strong, successful industry that has a significant positive impact on the Canadian economy. Key features of the Auto Pact were the 1:1 production to sales ratio and Canadian Value Added requirements. Magna International is Canada39。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 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。 it purchased Audi in 1964, which eventually lead to the formation of today’s39。s most famous car was the small, beetleshaped economical people39。 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。 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 703