變速箱對(duì)汽車(chē)動(dòng)力影響的直接點(diǎn)就是變速箱傳動(dòng)比對(duì)動(dòng)力的影響，那么變速箱在發(fā)動(dòng)機(jī)動(dòng)力傳遞過(guò)程中所起到的作用是如何的呢？下面就來(lái)了解下相關(guān)內(nèi)容吧。

　　The direct point of gearbox's influence on vehicle power is the influence of gearbox's transmission ratio on power, so what is the role of gearbox in the process of engine power transmission? Let's get to know the relevant content.

　　汽車(chē)速度的影響因素在于單位時(shí)間內(nèi)發(fā)動(dòng)機(jī)的輸出功率。這是一個(gè)籠統(tǒng)的說(shuō)法，但如果要更詳細(xì)一點(diǎn)，就是單位時(shí)間內(nèi)發(fā)動(dòng)機(jī)動(dòng)力傳遞給車(chē)輪的車(chē)輪扭矩值。在變速箱的整個(gè)動(dòng)力傳遞過(guò)程中，發(fā)動(dòng)機(jī)的動(dòng)力在變速箱和尾齒輪的主從傳動(dòng)比減速的情況下，會(huì)大大降低傳遞給車(chē)輪的發(fā)動(dòng)機(jī)轉(zhuǎn)速，因此傳遞給車(chē)輪的扭矩將大于發(fā)動(dòng)機(jī)工作時(shí)的輸出的扭矩。

　　The speed of a car depends on the output power of the engine per unit time. This is a general statement, but if you want to be more specific, it is the value of wheel torque transferred from engine power to the wheels per unit time. In the whole process of transmission power transmission, the engine power in the case of gearbox and tail gear master-slave ratio deceleration, will greatly reduce the engine speed transmitted to the wheel, so the torque transmitted to the wheel will be greater than the output torque of the engine when working.

　　與手動(dòng)變速箱、雙離合變速箱、AT變速箱一樣，它們工作的核心是齒輪嚙合，即從動(dòng)齒輪與從動(dòng)齒輪的比扭矩原理。很多人也喜歡用山地車(chē)的傳動(dòng)原理來(lái)解釋這個(gè)原理，變速箱的原理真的大致是這樣的。

　　Like manual gearbox, dual clutch gearbox and AT gearbox, the core of their work is gear engagement, that is, the principle of specific torque between driven gear and driven gear. Many people also like to use mountain bike transmission principle to explain this principle, the principle of gearbox is really roughly like this.

　　在低速時(shí)，變速器用直徑較小的主動(dòng)齒輪帶動(dòng)直徑較大的從動(dòng)齒輪轉(zhuǎn)動(dòng)。這種“小帶大帶”的齒輪轉(zhuǎn)動(dòng)結(jié)構(gòu)，會(huì)使直徑較小的主動(dòng)齒輪承受較大的嚙合阻力和轉(zhuǎn)動(dòng)阻力。此時(shí)，小直徑主齒輪旋轉(zhuǎn)數(shù)周后，大直徑從動(dòng)齒輪僅旋轉(zhuǎn)一次。

　　At low speed, a driving gear with a smaller diameter drives a driven gear with a larger diameter to rotate. The gear rotation structure of "small belt and big belt" will make the driving gear with smaller diameter bear larger meshing resistance and rotational resistance. At this point, after several weeks of rotation of the small-diameter main gear, the large-diameter driven gear rotates only once.

　　山東變速箱維修人員認(rèn)為在這種情況下，變速箱傳遞給車(chē)輪的轉(zhuǎn)速將非常低。這時(shí)，我們可以在“功率=轉(zhuǎn)速×扭矩”的公式中看到，在發(fā)動(dòng)機(jī)輸出功率不變的情況下，低檔狀態(tài)下轉(zhuǎn)速降低，扭矩自然增大，車(chē)輪扭矩傳遞到車(chē)輪也發(fā)生了變化。

　　Shandong transmission maintenance personnel think that in this case, the speed of transmission to the wheel will be very low. At this time, we can see in the formula of "power = speed × torque", in the case of constant engine output power, the speed decreases in low gear, the torque increases naturally, and the torque transfer from the wheel to the wheel also changes.

　　在高速檔時(shí)，變速箱的主從動(dòng)齒輪是一個(gè)大直徑的主齒輪帶動(dòng)一個(gè)小直徑的從動(dòng)齒輪，這意味著當(dāng)主齒輪旋轉(zhuǎn)一次時(shí)，從動(dòng)齒輪已經(jīng)旋轉(zhuǎn)了幾次，因此傳遞到車(chē)輪的轉(zhuǎn)速會(huì)自然增大，然后車(chē)輪扭矩自然會(huì)減小。

　　In high gear, the main slave gear of the gearbox is a large diameter main gear driving a small diameter driven gear, which means that when the main gear rotates once, the driven gear has already rotated several times, so the speed transmitted to the wheel will naturally increase, and then the wheel torque will naturally decrease.

　　變速箱在汽車(chē)中的作用也是有目共睹的。例如，汽車(chē)變速箱可以改變傳動(dòng)比，擴(kuò)大驅(qū)動(dòng)輪扭矩和轉(zhuǎn)速的變化范圍，適應(yīng)頻繁變化的行駛條件；使發(fā)動(dòng)機(jī)在有利條件下工作；在發(fā)動(dòng)機(jī)轉(zhuǎn)動(dòng)方向不變的情況下，車(chē)輛可以倒車(chē)行駛。此外，變速器可以利用空檔來(lái)中斷動(dòng)力傳遞，使發(fā)動(dòng)機(jī)能夠啟動(dòng)和怠速，便于變速器換檔和動(dòng)力輸出。

　　Gearbox in the role of the car is also obvious. For example, the automobile gearbox can change the transmission ratio, expand the range of driving wheel torque and speed change, adapt to the frequently changing driving conditions; Make the engine work under favorable conditions; The vehicle can be driven in reverse with the engine turning in the same direction. In addition, the transmission can use neutral to interrupt power transmission, enabling the engine to start and idle, facilitating transmission shift and power output.

　　變速箱在發(fā)動(dòng)機(jī)動(dòng)力傳遞過(guò)程中起到好作用是肯定的，如果您對(duì)這方面的內(nèi)容知之甚少的話，可以來(lái)我們網(wǎng)站www.fdwhkj.cn點(diǎn)擊新聞看看相關(guān)的資訊！

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