濟南自動變速箱核心原理揭秘，換擋邏輯+類型解析一看就懂

　　The core principle of Jinan automatic transmission is revealed, and the shifting logic and type analysis are easy to understand at a glance

　　在濟南汽車市場，隨著2025年國產乘用車占比達57.14%、純電滲透率突破28.94%，自動變速箱已成為絕大多數車輛的核心配置，但不少車主仍存在認知誤區——認為自動變速箱與差速器作用相同，均是給發動機變速，甚至不清楚自動擋是否需要換擋。作為深耕汽車維修與科普領域的從業者，今天就結合濟南本地市場現狀，拆解濟南自動變速箱的核心作用、工作原理及主流類型，用通俗且專業的表述，幫車主徹底搞懂自動變速箱，避開認知誤區。

　　In the Jinan automobile market, with the domestic passenger car market accounting for 57.14% and pure electric penetration rate exceeding 28.94% by 2025, automatic transmission has become the core configuration of the vast majority of vehicles. However, many car owners still have misconceptions - they believe that automatic transmission and differential have the same function, both of which are to shift the engine, and they are even unclear whether automatic transmission needs to shift gears. As a practitioner deeply involved in the fields of automotive maintenance and science popularization, today we will combine the current situation of the local market in Jinan to dismantle the core role, working principle, and mainstream types of automatic transmissions in Jinan. Using simple and professional expressions, we will help car owners thoroughly understand automatic transmissions and avoid cognitive errors.

　　首先明確核心誤區：自動變速箱與差速器作用并非一致，二者雖均依賴齒輪傳動，但功能截然不同。差速器的核心作用是調節車輛轉彎時左右車輪的轉速差，避免轉彎跑偏；而自動變速箱的核心功能有兩個——改變發動機的轉速和運行方向，通過調節轉速實現車速控制，通過改變方向實現前進與倒車切換，這也是車輛能靈活調速、自由換向的核心原因。

　　Firstly, clarify the core misconception: automatic transmissions and differentials do not have the same function, and although both rely on gear transmission, their functions are completely different. The core function of the differential is to adjust the speed difference between the left and right wheels of the vehicle during turning, in order to avoid deviation during turning; The core functions of an automatic transmission are twofold - to change the engine speed and direction of operation, to control the vehicle speed by adjusting the speed, and to switch between forward and reverse by changing the direction. This is also the core reason why vehicles can flexibly adjust speed and freely change direction.

　　自動變速箱的變速原理，本質是通過不同大小的齒輪組合切換，改變傳動比，進而調節轉速。其核心邏輯與手動擋一致，均依靠“小齒輪驅動大齒輪減速、大齒輪驅動小齒輪加速”，只是換擋動作由電腦或機械裝置自動完成。比如一檔采用“小主動輪+大被動輪”組合，小齒輪轉動4圈，被動輪僅轉動1圈，實現大幅減速，適配起步、爬坡等低速高扭矩場景；二檔則增大主動輪、減小被動輪，傳動比發生變化，車速比一檔提升15%-20%；以此類推，檔位越高，主動輪與被動輪的尺寸差距越小，車速越快，其中五檔多為直接檔，發動機與傳動軸直接連接，車速與發動機轉速基本一致，是最快檔位。

　　The shifting principle of an automatic transmission is essentially to switch through different sizes of gear combinations, change the transmission ratio, and then adjust the speed. Its core logic is consistent with manual transmission, relying on "small gears driving large gears for deceleration and large gears driving small gears for acceleration", except that the shifting action is automatically completed by a computer or mechanical device. For example, the first gear adopts a combination of "small driving wheel+large passive wheel", with the small gear rotating 4 turns and the passive wheel rotating only 1 turn, achieving significant deceleration and adapting to low-speed and high torque scenarios such as starting and climbing; In second gear, the driving wheel is increased and the passive wheel is decreased, resulting in a change in transmission ratio and a 15% -20% increase in vehicle speed compared to first gear; Similarly, the higher the gear, the smaller the size difference between the active and passive wheels, and the faster the vehicle speed. Among them, the fifth gear is mostly a direct gear, and the engine is directly connected to the transmission shaft. The speed and engine speed are basically the same, making it the fastest gear.

　　很多濟南車主疑惑“自動擋到底要不要換擋”，答案是肯定的——所有變速箱都需要換擋，區別僅在于換擋方式。手動擋需車主手動撥動檔位、踩離合切換；而自動擋只需將檔位設置為前進（D檔）或倒車（R檔），其余換擋動作均由變速箱電腦自動完成，無需車主干預，這也是自動擋便捷性的核心體現。

　　Many car owners in Jinan are puzzled about whether automatic transmission should shift gears, and the answer is yes - all transmissions need to shift gears, the only difference being the shifting method. Manual transmission requires the owner to manually shift the gear and press the clutch to switch; The automatic transmission only requires setting the gear to forward (D gear) or reverse (R gear), and the rest of the shifting actions are automatically completed by the transmission computer without the intervention of the owner, which is also the core manifestation of the convenience of automatic transmission.

　　結合濟南汽車市場主流車型，目前常見的自動變速箱主要有三類，工作原理各有不同。第一類是雙離合變速箱（DCT），本質是在手動擋基礎上加裝自動換擋和離合裝置，通過4個電機分別控制5個前進檔和1個倒檔，同時搭配電機控制離合器，由控制器統籌電機運行，實現自動換擋，適配多數家用轎車，在濟南國產乘用車中占比不低。第二類是AT自動變速箱，通過制動器與離合器的配合工作，由電腦控制油路的接通與切斷，實現檔位切換，穩定性強，適配SUV、商用車等多種車型，濟南貨車等商用車中應用廣泛。第三類是CVT變速箱，通過控制兩個鏈輪的大小變化，實現無頓挫換擋，在濟南進口車市場占比達20.2%，主打平順性，適合城市通勤。

　　Based on the mainstream models in the Jinan automobile market, there are currently three common types of automatic transmissions with different working principles. The first type is dual clutch transmission (DCT), which essentially adds automatic shifting and clutch devices on the basis of manual transmission. It controls 5 forward gears and 1 reverse gear through 4 motors, and is equipped with a motor to control the clutch. The controller coordinates the operation of the motor to achieve automatic shifting, which is suitable for most family cars and accounts for a considerable proportion of domestic passenger cars in Jinan. The second type is the AT automatic transmission, which works in conjunction with the brake and clutch, and is controlled by the computer to switch gears. It has strong stability and is suitable for various vehicle models such as SUVs and commercial vehicles. It is widely used in commercial vehicles such as Jinan trucks. The third type is CVT gearbox, which achieves seamless shifting by controlling the size changes of two sprockets. It accounts for 20.2% of the imported car market in Jinan and focuses on smoothness, suitable for urban commuting.

　　倒車檔的工作原理也十分簡單，與前進檔相比，僅增加了一組反向齒輪，切換倒檔時，齒輪傳動方向改變，傳動軸運行方向與發動機相反，進而帶動輪胎反向轉動，實現倒車。值得注意的是，自動變速箱的換擋邏輯與車速、發動機轉速精準匹配，比如起步時自動切換至一檔，車速提升后逐步升檔，減速時自動降檔，既保證動力輸出，又兼顧燃油經濟性。

　　The working principle of reverse gear is also very simple. Compared with forward gear, it only adds a set of reverse gears. When switching reverse gear, the direction of gear transmission changes, and the running direction of the transmission shaft is opposite to the engine, which in turn drives the tires to rotate in the opposite direction, achieving reverse. It is worth noting that the shifting logic of an automatic transmission is precisely matched with the vehicle speed and engine speed. For example, it automatically switches to first gear when starting, gradually upshifts as the vehicle speed increases, and automatically downshifts when decelerating, ensuring both power output and fuel economy.

　　隨著濟南汽車市場向多元化動力轉型，自動變速箱的應用愈發廣泛，其性能直接影響車輛的駕駛體驗、動力輸出和使用壽命。厘清自動變速箱的核心原理與認知誤區，不僅能幫助濟南車主更好地操作車輛、延長變速箱使用壽命，也能在車輛維修保養時更具針對性，避免被誤導。未來，隨著新能源汽車的普及，自動變速箱技術也將持續迭代，進一步適配濟南車主的駕駛需求，為車主帶來更便捷、平順的駕駛體驗。

　　With the diversified power transformation of Jinan's automobile market, the application of automatic transmissions is becoming increasingly widespread, and their performance directly affects the driving experience, power output, and service life of vehicles. Clarifying the core principles and cognitive misconceptions of automatic transmissions can not only help Jinan car owners better operate their vehicles and extend the service life of their transmissions, but also provide more targeted maintenance and repair services to avoid being misled. In the future, with the popularization of new energy vehicles, automatic transmission technology will continue to iterate, further adapting to the driving needs of Jinan car owners and bringing them a more convenient and smooth driving experience.

　　本文由 濟南自動變速箱 友情奉獻.更多有關的知識請點擊 http://m.xzyfw.cn/ 真誠的態度.為您提供為全面的服務.更多有關的知識我們將會陸續向大家奉獻.敬請期待.

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