变速箱是车辆非常重要的部件，它可以改变传动比，扩大驱动轮的扭矩和速度功能。那么汽车变速箱的功能如何？
济南自动变速箱维修人员为您解答。
The gearbox is a very important part of the vehicle. It can change the transmission ratio and expand the torque and speed functions of the drive wheels. What are the functions of the automobile gearbox? Jinan automatic transmission maintenance personnel will answer for you.
汽车变速箱的功能:
Functions of automobile gearbox:
1.改变传动比，扩大驱动轮的扭矩和速度范围，以适应频繁变化的行驶条件，同时使发动机在有利的工况下工作(更高的转速和更低的油耗)；
1. Change the transmission ratio, expand the torque and speed range of the driving wheel to adapt to the frequently changing driving conditions, and enable the engine to work under favorable working conditions (higher speed and lower fuel consumption);
2.在发动机旋转方向不变的情况下，汽车可以向后行驶；
2. Under the condition that the rotation direction of the engine is unchanged, the car can run backward;
3.用空挡中断动力传递，使发动机能启动和怠速，方便变速器换挡或输出动力。
3. Use neutral gear to interrupt power transmission, so that the engine can start and idle, facilitating transmission shifting or power output.
此外每个齿轮都有不同的传动比，这意味着小齿轮和大齿轮的啮合可以产生不同的速度。低速行驶时，使用低传动比(3档及以下)，大轴转速低于发动机转速。根据公式P=FV，可以得到更大的驱动力。高速行驶时，使用高传动比(4档及以上)，降低牵引力以获得更高的速度。切割齿轮时，可以选择不同尺寸的齿轮与大轴的齿轮啮合。
In addition, each gear has a different transmission ratio, which means that the meshing of the small gear and the big gear can produce different speeds. When driving at low speed, use low transmission ratio (gear 3 and below), and the large shaft speed is lower than the engine speed. According to the formula P=FV, a greater driving force can be obtained. When driving at high speed, use high transmission ratio (4th gear and above) to reduce the traction force to obtain higher speed. When cutting gears, you can select gears of different sizes to mesh with the gear of the big shaft.
What is the function of the car gearbox? We talked about the problem from three points. Of course, if you want to extend its service life, you need to do a good job of maintenance. Please consult us for more information http://www.jnbsx.com ！
