As we all know, automatic transmission is one of the important structures of automobile. The automatic transmission oil for automatic transmission is also "blood" like existence, essential.

大家都知道，自动变速箱油不仅仅是起到润滑和冷却作用，更重要的是有效的传递发动机和变速箱之间的扭矩，所有油质的好坏或瓶中型号选择的正确与否都直接影响到汽车功率损耗和自动变速箱的正常工作与使用寿命，同时也会影响到行车的舒适性和驾驶乐趣。

As we all know, the automatic transmission oil not only plays the role of lubrication and cooling, but also effectively transmits the torque between the engine and the transmission. The quality of all the oil or the correct selection of the model in the bottle directly affects the power loss of the car and the normal work and service life of the automatic transmission, as well as the comfort and pleasure of driving.

因此，车主在平日里用车时，定期对自动变速箱保养检查是必不可少的。有些变速箱厂家打着“终身免维护”的口号，但是，就真的可以终身免维护了吗？其实不然，从严格角度来说，这是不科学的，自动变速箱在正常使用中自动变速箱油就算不变质等，也还需要挥发，器容量也会发生变化，到达不了其标准值。

Therefore, it is essential for car owners to maintain and check the automatic transmission regularly when they use the car on weekdays. Some gearbox manufacturers use the slogan of "maintenance free for life", but can they really maintain free for life? In fact, it is not. Strictly speaking, it is unscientific. Even if the automatic transmission oil is not deteriorated in normal use, it still needs to volatilize, and the capacity of the transmission will also change, which can not reach its standard value.

自动变速箱油会在哪几种情况下发生变质现象呢？

Under which conditions will the automatic transmission oil deteriorate?

一、自动变速箱工作过程（液力传动-变矩器，双离合等），由于变扭器在传递发动机时有一部分是利用液力实现的，因此会形成大量的热能；同时离合器和制动器在工作时产生摩擦力矩时也会产生大量的热，因此导致自动变速箱油在一定时间内变质。

1、 During the working process of automatic transmission (hydraulic transmission torque converter, double clutch, etc.), a large amount of heat energy will be generated because the torque converter uses hydraulic power to transfer the engine; at the same time, when the clutch and brake generate friction torque, a large amount of heat will also be generated, resulting in the deterioration of automatic transmission oil in a certain period of time.

二、自动变速箱工作环境（温度，环境信息），经常性工作较苛刻的环境下，由于自动变速箱的工作载荷较大，导致自动变速箱的工作温度升高，长时间下来也会导致自动变速箱油提前变质。

2、 The working environment (temperature, environmental information) of the automatic transmission is often harsh. Due to the large working load of the automatic transmission, the working temperature of the automatic transmission will rise, and the automatic transmission oil will deteriorate in advance for a long time.

三、自动变速箱参数的变化（压力，摩擦系数等），在某些工况下，由于自动变速箱的一些正常参数下降，导致压力，摩擦系数的降低而影响变速箱的正常运转。

3、 The change of automatic transmission parameters (pressure, friction coefficient, etc.) will affect the normal operation of the transmission due to the decrease of some normal parameters of the automatic transmission under some working conditions.

一般情况下，建议车主在4-6万或两年更换一次自动变速箱油。定期对自动变速箱做检查养护，以免自动变速箱油提前变质，影响自动变速箱使用。

Under normal circumstances, it is recommended that car owners change the automatic transmission oil once every 40000-60000 km or every two years. Check and maintain the automatic transmission regularly, so as to avoid the deterioration of the automatic transmission oil in advance, which will affect the use of the automatic transmission.