其實(shí)變速箱對汽車動力影響的直接點(diǎn)就是變速箱傳動比對動力的影響。變速箱的本質(zhì)是一個(gè)變矩器，所以我們也可以稱之為變矩器。那么再來和山東變速箱維修廠家一起看看變速箱在發(fā)動機(jī)動力傳遞過程中，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?

我們都知道決定汽車速度的因素在于單位時(shí)間內(nèi)發(fā)動機(jī)的輸出功率，這是一個(gè)籠統(tǒng)的說法，但如果我們想更詳細(xì)一點(diǎn)，那就是單位時(shí)間內(nèi)發(fā)動機(jī)功率終傳遞給車輪的是車輪扭矩值。

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.

在變速箱的整個(gè)動力傳遞過程中，發(fā)動機(jī)的動力會在變速箱主從傳動比和尾齒的減速作用下，大大降低傳遞給車輪的發(fā)動機(jī)轉(zhuǎn)速，所以終傳遞給車輪的扭矩會大于發(fā)動機(jī)做功時(shí)輸出的扭矩，這也是變速箱被稱為“扭矩箱”的原因，這也是變速箱的意義所在。

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.

上面簡短介紹了變速箱在整個(gè)動力傳遞中的本質(zhì)，那么它是通過怎樣的方式來改變扭矩呢？像手動變速箱、雙離合變速箱、AT變速箱，它們的工作核心都是齒輪嚙合，也就是從動齒輪與從動齒輪比值的扭矩原理。很多汽車作家也喜歡用山地車的變速原理來解釋這個(gè)原理，變速箱的原理真的大致是這樣的。

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.

低速時(shí)，變速箱用直徑較小的主動齒輪帶動直徑較大的從動齒輪轉(zhuǎn)動。這種“小帶大帶”的齒輪轉(zhuǎn)動結(jié)構(gòu)，會使直徑較小的主動齒輪受到更大的嚙合阻力和轉(zhuǎn)動阻力。這時(shí)，小直徑的主齒輪旋轉(zhuǎn)幾周后，大直徑的從動齒輪只會旋轉(zhuǎn)一次。在這種情況下，終由變速箱傳遞給車輪的轉(zhuǎn)速會非常低。

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.

當(dāng)發(fā)動機(jī)的輸出功率不變時(shí)，低擋狀態(tài)下的轉(zhuǎn)速降低，所以扭矩自然增大，終傳遞到車輪上的車輪扭矩也變大。在高擋位時(shí)，變速箱的主從動齒輪是大直徑的主齒輪帶動小直徑的從動齒輪，這意味著當(dāng)主齒輪旋轉(zhuǎn)一次時(shí)，從動齒輪已經(jīng)旋轉(zhuǎn)了幾次，所以傳遞給車輪的轉(zhuǎn)速自然會增加，然后車輪扭矩自然會減小。

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.

變速箱在發(fā)動機(jī)動力傳遞過程中所起的作用內(nèi)容講解完畢了，希望能夠給您好的幫助，當(dāng)然您有問題或者什么需求隨時(shí)可以來我們網(wǎng)站http://njzhuiri.cn進(jìn)行咨詢！

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://njzhuiri.cn Consult!