搭載同一發動機的車型在升級更多檔位的變速箱后，加速都有所提升，但是“檔位越多，提速越快”并不構成因果邏輯。汽車的加速性能由變速箱能承受的起步轉速、變速箱的換擋速度、以及前幾個擋位的齒比共同決定的，這些都跟車企的標定密切相關，跟擋位的數量沒有太多關系。
The vehicle that carries the same engine increases the speed of the gearbox after the upgrade of more gear, but "the more the gear, the faster the speed" does not constitute a causal logic. The acceleration performance of a car is determined by the starting speed of the gearbox, the gear shift speed, and the tooth ratio of the previous gear, which are closely related to the calibration of the car enterprise, and have little to do with the number of the gears.
自動變速箱的誕生，原意是想將駕駛者的左腳解放出來，并降低駕駛車輛的難度，提高駕駛的舒適度。事實證明，自動變速箱確實更適用于擁擠的城市化生活，因此，成了全球車企爭先研發的重點。
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The birth of the automatic transmission is intended to liberate the driver's left foot, reduce the difficulty of driving and improve driving comfort. It turns out that the automatic transmission is more suitable for the crowded urbanization life, so it has become the focus of research and development of the global car companies.
設計多擋位變速箱的初衷確實是為了達到更好的燃油經濟性，大多數6擋自動變速箱肯定比3擋的油耗要低。多擋位能帶來更寬的齒比范圍，較高擋位齒比也能更小，從而使發動機高速巡航的轉速更低，油耗也就越低，但實際情況并不。
The purpose of designing multi shift gearbox is to achieve better fuel economy. Most of the 6 transmission automatic gearboxes must be lower than the 3 gear fuel consumption. Multi gear can bring a wider range of tooth ratio, and the highest gear ratio can be smaller, so that the speed of the high speed cruising of the engine is lower and the fuel consumption is lower, but the actual situation is not absolute.
換擋的平順受很多因素影響，但擋位的多少起不了決定性作用。擋位多只能說明齒比落差比較小，發動機轉速差比較小，但不直接說明換擋平順。自動變速箱也一樣，液力變矩器取代離合器的存在決定了“旋律”的跌宕起伏，而車企對液力變矩器的標定，比如液體粘度、升降擋時機、轉速補償等都直接影響到變速箱的順滑程度。
Shifting is affected by many factors, but the number of gears is not decisive. More gear can only show that the gear ratio is small, and the engine speed difference is relatively small, but it does not directly explain the shifting smoothly. Automatic transmission is the same, the existence of the torque converter to replace the clutch determines the "Melody" of the ups and downs, and the car enterprise calibration of the torque converter, such as liquid viscosity, lifting gear timing, speed compensation and so on directly affect the speed of the speed of the gearbox.
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