汉英对照:
Chinese-English Translation:
CVT是指一种汽车变速器，也叫无级变速器。CVT与有级变速器的区别在于，它的变速比不是间断的点，而是一系列连续的值，从而实现了良好的经济性、动力性和驾驶平顺性，而且降低了排放和成本。
CVT is a kind of automobile transmission, also called CVT. The difference between CVT and staged transmission is that its transmission ratio is not a discontinuous point, but a series of continuous values, so as to achieve good economy, power and ride comfort, and reduce emissions and costs.
CVT 是指一种汽车变速器，也叫无级变速器。CVT 与有级变速器的区别在于，它的变速比不是间断的点，而是一系列连续的值，从而实现了良好的经济性、动力性和驾驶平顺性，而且降低了排放和成本。
CVT is a kind of automobile transmission, also called CVT. The difference between CVT and staged transmission is that its transmission ratio is not a discontinuous point, but a series of continuous values, so as to achieve good economy, power and ride comfort, and reduce emissions and costs.
CVT（Continuously Variable Transmission），直接翻译就是连续可变传动，也就是我们常说的无级变速箱，顾名思义就是没有明确具体的档位，操作上类似自动变速箱，但是速比的变化却不同于自动变速箱的跳挡过程，而是连续的，因此动力传输持续而顺畅。
CVT (continuous variable transmission), direct translation is continuous variable transmission, which is often referred to as CVT. As the name implies, there is no specific gear, similar to automatic transmission in operation, but the change of speed ratio is different from the process of automatic transmission, but continuous, so the power transmission is continuous and smooth.
CVT 技术再次成为人们关注的新技术之一。市场上销售的汽车，装备的变速箱主要有手动变速器（MT）、自动变速器（AT）、无级变速器（CVT）、双离合变速器（DCT）。
CVT technology has become one of the new technologies that people pay attention to again. The vehicles sold on the market are equipped with MT, at, CVT and DCT.
原理
principle
CVT 传动系统里，传统的齿轮被一对滑轮和一只钢制皮带所取代，每个滑轮其实是由两个椎形盘组成的 V 形结构，引擎轴连接小滑轮，透过钢制皮带带动大滑轮。玄机就出在这特殊的滑轮上：CVT 的传动滑轮构造比较奇怪，分成活动的左右两半，可以相对接近或分离。锥型盘可在液压的推力作用下收紧或张开，挤压钢片链条以此来调节 V 型槽的宽度。当锥型盘向内侧移动收紧时，钢片链条在锥盘的挤压下向圆心以外的方向（离心方向）运动，相反会向圆心以内运动。这样，钢片链条带动的圆盘直径增大，传动比也就发生了变化。
In CVT transmission system, the traditional gear is replaced by a pair of pulleys and a steel belt. Each pulley is actually a V-shaped structure composed of two cone-shaped discs. The engine shaft is connected with a small pulley, which drives the large pulley through the steel belt. The mystery lies in this special pulley: the transmission pulley of CVT has a strange structure, which is divided into two movable left and right halves, which can be relatively close or separated. The tapered disc can be tightened or opened under the action of hydraulic thrust, and the width of V-groove can be adjusted by extruding the steel chain. When the tapered disc moves to the inner side for tightening, the steel chain moves to the direction outside the center of the circle (centrifugal direction) under the extrusion of the tapered disc, and vice versa. In this way, the diameter of the disc driven by the steel sheet chain increases, and the transmission ratio changes.
优缺点
Advantages and disadvantages
1、由于没有了一般自动挡变速箱的传动齿轮，也就没有了自动挡变速箱的换挡过程，由此带来的换档顿挫感也随之消失，因此 CVT 变速箱的动力输出是线性的，在实际驾驶中非常平顺。
1. Because there is no transmission gear of the general automatic transmission, there is no shift process of the automatic transmission, and the shift jerk caused by this disappears, so the power output of CVT transmission is linear, which is very smooth in actual driving.
2、CVT 的传动系统理论上挡位可以无限多，挡位设定更为自由，传统传动系统中的齿轮比、速比以及性能、耗油、废气排放的平衡，都更容易达到。
2. Theoretically, the transmission system of CVT can have unlimited gears, and the gears are set more freely. The gear ratio, speed ratio, performance, fuel consumption and exhaust emission balance in the traditional transmission system are easier to achieve.
3、CVT 传动的机械效率、省油性大大优于普通的自动挡变速箱，仅次于手动挡变速箱，燃油经济性要好很多。
3. The mechanical efficiency and fuel economy of CVT transmission are much better than that of ordinary automatic transmission, only inferior to manual transmission, and the fuel economy is much better.
4、相比传统自动挡变速箱而言，它的成本要略高；而且操作不当的话，出问题的概率更高。
4. Compared with the traditional automatic transmission, its cost is slightly higher, and if the operation is improper, the probability of problems is higher.
5、CVT 变速箱本身还有它的缺点，就是传动的钢带能够承受的力量有限，不过随着科技的进步，钢带承受能力的问题正在解决，很快我们就可以看到大排量高扭矩车型会装备 CVT 变速箱了。
5. CVT gearbox has its own shortcomings, that is, the power that the steel belt of transmission can bear is limited. However, with the progress of science and technology, the problem of steel belt bearing capacity is being solved. Soon we can see that large displacement and high torque vehicles will be equipped with CVT gearbox.
