8速变速箱的科技与应用（Technology and application of 8 speed gearbox）.docVIP

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8速变速箱的科技与应用（Technology and application of 8 speed gearbox）.doc

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8速变速箱的科技与应用（Technology and application of 8 speed gearbox） As a car editor, have lamented the technology development speed of the car quickly, take the transmission, only 3 years before the 4 speed automatic transmission is still the mainstream, equipped with 6 speed transmission models will be the manufacturer a whoop and a holler. Now, the 6 speed transmission has become the mainstream of intermediate cars, and even many compact and compact cars have already used the 6 speed automatic transmission. While cheering for the Mercedes Benz 7 speed automatic transmission, some models have begun assembling the 8 speed automatic transmission. So far, there are 8 models equipped with a two speed manual transmission: BMW GranTorismo 5, BMW new 5 Series (2010), Lexus LS460L, Lexus]460, Rolls-Royce GS[review photo forum, Audi new A8 Gusteau (2010) In 2006 Lexus launched its first assembly of the 8 speed automatic transmission LS460L, and later in the assembly in the GS460, the 8 speed automatic transmission is TOYOTA independent research and development. BMW, Audi and Rolls-Royce models are only launched this year is equipped with 8 speed transmission models, using the German ZF companys products, but more advanced technology than Lexus, we will be on the back. Here, some friends may have several questions: Question: are there more gears in the automatic transmission? Will there be a 9 speed, 10 speed or even more gear transmission then? Answer: theoretically, the transmission gear is indeed the more the better, because the more gear, the gear ratio of each gear can be adjusted more closely, the advantage of doing so is to accelerate faster, more fuel-efficient. The reason why there is no more gear transmission is limited by the technology (the more gear, the larger the transmission volume, the more complex the internal structure), not the car manufacturers do not want to. Question: is the dual clutch transmission better than the 8 speed transmission? If so, why dont these ma