其实变速箱对汽车动力影响的直接点就是变速箱传动比对动力的影响。变速箱的本质是一个变矩器，所以我们也可以称之为变矩器。那么再来和
山东变速箱维修厂家一起看看变速箱在发动机动力传递过程中，所起到的作用是如何的？
In fact, the direct point of the impact of the gearbox on the vehicle power is the impact of the transmission ratio of the gearbox on the power. The essence of the transmission is a torque converter, so we can also call it a torque converter. Then let's check with the Shandong gearbox maintenance manufacturer how the gearbox plays a role in the engine power transmission process?
我们都知道决定汽车速度的因素在于单位时间内发动机的输出功率，这是一个笼统的说法，但如果我们想更详细一点，那就是单位时间内发动机功率终传递给车轮的是车轮扭矩值。
We all know that the factor that determines the speed of a car is the output power of the engine in unit time. This is a general statement, but if we want to be more detailed, it is the torque value of the wheel that the engine power ultimately transfers to the wheel in unit time.
在变速箱的整个动力传递过程中，发动机的动力会在变速箱主从传动比和尾齿的减速作用下，大大降低传递给车轮的发动机转速，所以终传递给车轮的扭矩会大于发动机做功时输出的扭矩，这也是变速箱被称为“扭矩箱”的原因，这也是变速箱的意义所在。
During the whole power transmission process of the gearbox, the engine power will greatly reduce the engine speed transmitted to the wheels under the reduction of the transmission master slave ratio and tail gear. Therefore, the torque finally transmitted to the wheels will be greater than the torque output when the engine works. This is also the reason why the gearbox is called "torque box", which is also the meaning of the gearbox.
上面简短介绍了变速箱在整个动力传递中的本质，那么它是通过怎样的方式来改变扭矩呢？像手动变速箱、双离合变速箱、AT变速箱，它们的工作核心都是齿轮啮合，也就是从动齿轮与从动齿轮比值的扭矩原理。很多汽车作家也喜欢用山地车的变速原理来解释这个原理，变速箱的原理真的大致是这样的。
The essence of gearbox in the whole power transmission is briefly introduced above. How does it change torque? Like manual gearbox, double clutch gearbox and AT gearbox, the core of their work is gear mesh, that is, the torque principle of the ratio of driven gear to driven gear. Many auto writers also like to explain this principle with the transmission principle of mountain bikes. The principle of the gearbox is really roughly like this.
低速时，变速箱用直径较小的主动齿轮带动直径较大的从动齿轮转动。这种“小带大带”的齿轮转动结构，会使直径较小的主动齿轮受到更大的啮合阻力和转动阻力。这时，小直径的主齿轮旋转几周后，大直径的从动齿轮只会旋转一次。在这种情况下，终由变速箱传递给车轮的转速会非常低。
At low speed, the transmission uses the driving gear with smaller diameter to drive the driven gear with larger diameter to rotate. The gear rotation structure of "small belt and large belt" will make the driving gear with smaller diameter suffer greater meshing resistance and rotation resistance. At this time, after the small diameter main gear rotates for several weeks, the large diameter driven gear will only rotate once. In this case, the speed transmitted from the gearbox to the wheels will be very low.
当发动机的输出功率不变时，低挡状态下的转速降低，所以扭矩自然增大，终传递到车轮上的车轮扭矩也变大。在高挡位时，变速箱的主从动齿轮是大直径的主齿轮带动小直径的从动齿轮，这意味着当主齿轮旋转一次时，从动齿轮已经旋转了几次，所以传递给车轮的转速自然会增加，然后车轮扭矩自然会减小。
When the output power of the engine is constant, the speed at low gear decreases, so the torque naturally increases, and the wheel torque eventually transmitted to the wheels also increases. At high gear, the driving and driven gears of the transmission are the ones with large diameter driving the driven gears with small diameter. This means that when the main gear rotates once, the driven gear has rotated several times, so the speed transmitted to the wheels will naturally increase, and then the wheel torque will naturally decrease.
The role of gearbox in engine power transmission has been explained. I hope I can help you. Of course, you can come to our website anytime you have problems or need http://www.jnbsx.com Consult!
