變速箱知識普及

　　Popularization of gearbox knowledge

　　從40年代初，美國成功研制出兩擋的液力-機械變速箱以來，自動變速箱技術得到了迅速發(fā)展。80年代，美國已將液力變速器作為轎車的標準裝備。1983年時，美國通用汽車的自動變速箱裝車率已經達到了94%。近些年來，由于電子技術和電子計算機技術的發(fā)展，自動變速箱技術已經達到了相當高的水平。

　　Since the early 1940s, when the United States successfully developed a two speed hydraulic mechanical transmission, automatic transmission technology has developed rapidly. In the 1980s, the United States had made hydraulic transmissions standard equipment for sedans. In 1983, the automatic transmission installation rate of General Motors in the United States had reached 94%. In recent years, due to the development of electronic technology and computer technology, automatic transmission technology has reached a relatively high level.

　　自動變速箱與手動變速箱相比較而言，具有許多不可比擬的優(yōu)勢，如提高了發(fā)動機和傳動系的使用壽命，具有良好的自動適應性，操縱更為方便等等。

　　Compared with manual transmissions, automatic transmissions have many incomparable advantages, such as improving the service life of the engine and transmission system, having good automatic adaptability, and being more convenient to operate.

　　在自動變速箱內的傳動介質稱為液力傳動油，俗稱自動變速箱油或ATF。ATF被泵輪帶動旋轉并吸收由機械能轉換成液體能。當油流經漩渦時又將液體能轉換成機械能，由渦輪輸出，實現(xiàn)能量的轉換與傳遞。

　　The transmission medium in an automatic transmission is called hydraulic transmission oil, commonly known as automatic transmission oil or ATF. The ATF is driven by the pump wheel to rotate and absorb mechanical energy, which is converted into liquid energy. When oil flows through a vortex, it converts liquid energy into mechanical energy, which is output by a turbine to achieve energy conversion and transfer.

　　自動變速箱內部結構復雜，因此對自動變速箱油的要求也是極高的。自動變速箱油在工作時必須要滿足以下幾點要求。

　　The internal structure of automatic transmission is complex, so the requirements for automatic transmission oil are also extremely high. Automatic transmission fluid must meet the following requirements during operation.