1. Forced downshift

有些車主在駕駛自動變速器的車超車時 ，踩下油門踏板 ，會發(fā)現轉速表突然上升 ，車速驟然升高 ，便認為車子出了問題 ，其實不然 。這種現象就是通常說的“強制降擋”功能 。短時超車 ，把油門踏板踩到底 ，自動變速器會被強制換回到擋 ，這是為了使汽車獲取較大的輸出扭矩 ，從而在短時間內起到明顯的加速作用 ，實現超車的意圖 。因此 ，這一現象是正常的 ，不是故障 但需要說明的是 ，強制降擋不宜經常使用 ，超車后應馬上松開油門 ，以免因油溫過高 、磨損過大降低執(zhí)行元件的使用壽命 。

Some car owners, when driving an automatic transmission and overtaking, press the accelerator pedal and notice a sudden increase in the tachometer and speed. They believe that the car has a problem, but in fact, it is not. This phenomenon is commonly known as the "forced downshift" function. Short term overtaking, when the accelerator pedal is fully pressed, the automatic transmission will be forced back to the lowest gear, in order to obtain a larger output torque for the car, thereby playing a significant acceleration role in a short period of time and achieving the intention of overtaking. Therefore, this phenomenon is normal and not a malfunction. However, it should be noted that forced downshifting should not be used frequently. After overtaking, the accelerator should be immediately released to avoid reducing the service life of the actuator due to high oil temperature and excessive wear.

2、自動變速器汽車的拖曳

2. Towing of automatic transmission vehicles

自動變速器的汽車不能進行拖拽 。這是因為自動變速器在不工作時 ，油液都沉積在油底殼中 ，只有油泵工作時才將油液泵出潤滑各部件 。因此 ，在拖拽過程中 ，發(fā)動機不工作 ，自動變速器油泵也就無法將自動變速器油泵出 ，長時間的拖拽就會導致自動變速器各執(zhí)行元件過度磨損 ，造成嚴重的后果 。

Cars with automatic transmissions cannot be towed. This is because when the automatic transmission is not working, the oil deposits in the oil pan, and the oil is only pumped out to lubricate various components when the oil pump is working. Therefore, during the dragging process, if the engine does not work, the automatic transmission oil pump cannot pump out the automatic transmission oil pump. Prolonged dragging can cause excessive wear and tear on the various actuating components of the automatic transmission, resulting in serious consequences.

3、自動變速器油的使用

3. Use of Automatic Transmission Fluid

自動變速器油用來傳遞液力變矩器的扭矩 、控制執(zhí)行元件的工作 、潤滑和冷卻自動變速器各部件 。長期使用的自動變速器油會摻入許多雜質 ，從而降低潤滑效果 ，長時間在高溫狀態(tài)下工作 ，抗氧化性和熱穩(wěn)定性也會下降 ，使各執(zhí)行元件磨損加劇 ，導致換擋沖擊 ，離合器打滑等故障的產生 。因此 ，自動變速器油必須定期進行更換 。

Automatic transmission oil is used to transmit the torque of the hydraulic torque converter, control the operation of the actuating components, lubricate and cool various components of the automatic transmission. Long term use of automatic transmission oil can incorporate many impurities, thereby reducing the lubrication effect. Working at high temperatures for a long time can also reduce oxidation resistance and thermal stability, exacerbating the wear of various actuating components, leading to gear shifting impact, clutch slip, and other faults. Therefore, automatic transmission oil must be replaced regularly.

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