我們知道，自動變速箱是個(gè)非常復(fù)雜精密的儀器，它的作用是把發(fā)動機(jī)的動力傳遞到車輛的行駛系統(tǒng)上。那么變速箱油到底是干嘛的呢？下面來講講。

As we know, automatic transmission is a very complex and precise instrument. Its function is to transmit the power of the engine to the driving system of the vehicle. So what is the transmission oil for? Now let's talk about it.

傳遞動力。

Transmit power.

為了傳遞動力，變速箱油必須有抗泡性，就是抵抗生成泡沫的能力。在傳遞動力的過程中，液體因?yàn)槠洳豢杀粔嚎s而效率很高。但是空氣如果混進(jìn)液體中，通過液力變矩器的不停攪和，就會產(chǎn)生了泡沫，顯著降低傳遞動力的效率。

In order to transmit power, the transmission oil must have anti foaming property, that is, the ability to resist the formation of foam. In the process of transmitting power, liquid is highly efficient because it cannot be compressed. However, if air is mixed into the liquid and stirred continuously by the hydraulic torque converter, foam will be produced, significantly reducing the efficiency of power transmission.

在液力變矩器后面，是變速箱豐富多彩復(fù)雜難懂的機(jī)械結(jié)構(gòu)。這些機(jī)械結(jié)構(gòu)也都是齒輪、摩擦片等組成，和其他機(jī)械一樣，這些相互接觸傳遞動力的機(jī)械結(jié)構(gòu)也需要潤滑和散熱。

Behind the hydraulic torque converter is the colorful and complicated mechanical structure of the gearbox. These mechanical structures are also composed of gears, friction plates, etc. like other machines, these mechanical structures that contact each other to transmit power also need lubrication and heat dissipation.

潤滑和散熱。

Lubrication and heat dissipation.

相比于發(fā)動機(jī)用的機(jī)油而言，變速箱油的性能要求更加復(fù)雜，因?yàn)闄C(jī)油并不承擔(dān)傳遞動力的作用。因?yàn)樽兯傧浼夹g(shù)的不斷發(fā)展，為了滿足其要求，變速箱油的性能要求也不斷提升，相關(guān)制造標(biāo)準(zhǔn)也是越來越復(fù)雜。

Compared with engine oil, the performance requirements of transmission oil are more complex, because engine oil does not play the role of transmitting power. Because of the continuous development of transmission technology, in order to meet its requirements, the performance requirements of transmission oil are also improving, and the relevant manufacturing standards are becoming more and more complex.

廠商越來越重視變速箱油，也是因?yàn)樗谴_保變速箱總成正常工作的根基要素。因?yàn)樽兯傧湫阅芮Р钊f別，不同型號變速箱的性能訴求也是千差萬別。而變速箱油是變速箱執(zhí)行換擋動作、散發(fā)熱量和潤滑齒輪的載體，自然要承擔(dān)很多的考驗(yàn)。

Manufacturers pay more and more attention to transmission oil, also because it is the basic element to ensure the normal operation of transmission assembly. Because the performance of gearboxes varies greatly, the performance demands of different models of gearboxes also vary greatly. The transmission oil is the carrier for the transmission to perform the shift action, dissipate heat and lubricate the gears, so it naturally has to bear many tests.

舉個(gè)例子：自動變速箱要換擋時(shí)，都是控制電腦發(fā)出信號，而閥體負(fù)責(zé)執(zhí)行。閥體的力量源泉?jiǎng)t是變速箱油傳遞過來的液壓力。我們知道液壓力的大小和液體的粘度息息相關(guān)，如果粘度發(fā)生巨大變化，那么設(shè)計(jì)階段所做的匹配、計(jì)算就全部失效了。

For example, when an automatic transmission wants to shift gears, the control computer sends a signal, and the valve body is responsible for the implementation. The power source of the valve body is the hydraulic pressure transmitted by the transmission oil. We know that the size of the liquid pressure is closely related to the viscosity of the liquid. If the viscosity changes greatly, the matching and calculation made in the design stage will all fail.

這也是長期使用后的變速箱，都會出現(xiàn)換擋頓挫，而換過濟(jì)南變速箱油后，情況就會明顯改善的原因--換油前，老油的粘度已經(jīng)無法和新油相比；換油后則恢復(fù)到設(shè)的理想狀態(tài)。

This is also the reason why gearboxes that have been used for a long time will have gear shifting setbacks, and the situation will be significantly improved after changing Jinan gearbox oil - before changing the oil, the viscosity of the old oil can no longer be compared with that of the new oil; After oil change, it will return to the ideal state at the time of design.

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