外文原文： he it to it of or on or on to to he of a is to to s in to s as as to A in is a of a a on or ,4on A of a to to to be a or on it a a a to to to be a is to to to to is to of is to is a a A is to a a a is of is in s or s to of of a of or a a a a an a do it in a an is of to to in an of of is in an in in of a as in a in to An a is by s in to to s a a is by he to is of a in a to to of by It an or to s a to is to a or 5is is by a by to a in at of a a 5In of is in by on in is of of in of in a to is to of is to a or or or a in or as is in a to or of to or WD is of WD it is of he to or an is to is to by as so at 5a in on is to on is to it is to of is 5 to on a is a a of to to up to a as of at up 8% or in On if or So it is to or at do to be or be At at in no to is to up by is by as . 0 .5 of 0 00. in of (as in (is of is is as 20 25 a 14- 02/1 is to of of in a of to of is a 6 to by or In is a of as do he in a is is of in by of in of of to of In of to of to (of in in of In a to be by of by of is by by of to 0,000 ,000 to 50 In it be to so on or in of of be in to an to An is in To as as (In is to to a a a to a 0 or a so do if (If is of a an to to at 0% or of to of in a be on or on or a of is by of at in is by of of of by of of of in in in to a in an to an as in or or or In or to In in a in be by by by if in of a “to in as If by be In be by or of If is of a of is as PL vs is by an in n 11 to n 15 it is an be on of it to of an to be to a A to of a in On of of no or be by by in an in a is 中文譯文： 動力傳動 系 A 動力傳動系有兩個作用：它把動力從發(fā)動機傳送到驅動輪上，并且改變扭矩的大小。動力傳動系包括： 造動力； 是手動就是自動； 用在手動變速器或者液力變矩器； 動力從變速器傳到差速器； 動力傳到兩個驅動軸上。 手動變速器 手動變速器的作用是，把發(fā)動機動力傳送到傳動軸和驅動輪。變速器內的齒輪，改變車輛驅動輪和發(fā)動機之間轉速和扭矩的比例。這樣保持發(fā)動機的輸出盡可能的靠近改變路面速度和最低速度。 一個手動的驅動橋，是一個由手動變速器，差速器，傳動軸組成 的。大多數前輪驅動汽車裝有一個驅動橋。這樣的驅動橋也能在一些前置引擎或者后輪驅動，四輪驅動的汽車，在后置引擎和后輪驅動的汽車上看到。 一個手動變速器包括使用一個離合器來消除發(fā)動機扭矩到變速器輸入軸。離合器允許這樣漸漸發(fā)生以至于汽車能夠啟動。 手動變速器通常有四到五個檔位，而且一般有“超速檔”，對于在路上的燃油經濟性這樣就意味著輸出軸比輸入軸轉的更快。當你使用變速器的時候，要維持同樣的速度，將減少發(fā)動機轉速的三分之一。 離合器 駕駛手動擋汽車，你踩下離合器，嚙合了齒輪，然后松掉離合器而汽車會適應動力前 進。離合器可使車輛啟動后發(fā)動機的動力被逐漸的加載，并可通過切斷動力防止換擋時齒輪被咬碎。離合器嚙合時把發(fā)動機動力傳送到變速器和驅動輪。離合器分離停止動力傳輸，在沒有動力傳到驅動輪上的情況下，發(fā)動機可以持續(xù)運轉。 離合器基本的部件是：飛輪，離合器盤，壓力盤，分離軸承和聯接裝置。 飛輪被螺栓固定在發(fā)動機的曲軸上。它的主要作用是傳送發(fā)動機扭矩從發(fā)動機到變速器。 離合器盤基本就是一塊鋼板，在飛輪和壓力盤中間覆蓋了一種耐摩擦材料。 離合器盤螺栓連接在飛輪上。它包括一張薄片金屬封蓋，彈簧 ，一個給離合器盤提供摩擦表面的金屬壓力環(huán)。 分離軸承是離合器操縱機構的中心。當離合器踏板踩下時，分離軸承指向飛輪，壓盤推進釋放了擋板然后移動壓盤彈簧片到壓盤彈簧彈力頂。 聯接裝置成倍地傳送駕駛員腿部力量到離合器壓盤的膜片。一個機械離合器連接裝置通常由離合器踏板，一系列連接桿臂或者一組電纜。一個液壓離合器聯接裝置大體上是由一個離合器制動缸和儲存器，一組液壓管路和一個從動缸。 自動變速器