外文翻譯---汽車變速器設(shè)計

1、<p><b>　　附錄</b></p><p>　　Transmission design</p><p>　　As we all know automobile engine to a certain speed can be achieved under the best conditions, when compared issued by the

2、power, fuel economy is relatively good. Therefore, we hope that the engine is always in the best of conditions to work under. However, the use of motor vehicles need to have different speeds, thus creating a conflict. Tr

3、ansmission through this conflict to resolve.</p><p>　　Automotive Transmission role sum up in one sentence, called variable speed twisting, twisting or slow down the growth rate by increasing torsional. Why c

4、an slow down by twisting, and the growth rate but also by twisting? For the same engine power output, power can be expressed as N = WT, where w is the angular velocity of rotation. When N fixed, w and T is inversely prop

5、ortional to the. Therefore, the growth rate will reduce twisting, twisting slowdown will increase. Automotive Transmission spee</p><p>　　General to set up a manual gearbox input shaft, intermediate shaft and

6、 output shaft, also known as the three-axis, as well as Daodang axis. Three-axis is the main transmission structure, input shaft speed is the speed of the engine, the output shaft speed is the intermediate shaft and outp

7、ut shaft gear meshing between different from the speed. Different gears are different transmission ratio, and will have a different speed. For example Zhengzhou richan ZN6481W2G manual transmission car-SUV, its</p>

8、<p>　　When drivers choose a launch vehicle stalls, Plectrum will be 1 / 2 file synchronization engagement with a back stall gear and output shaft lock it, the power input shaft, intermediate shaft and output shaft

9、 gear of a stall, a stall the output shaft gear driven, and the output shaft power will be transmitted to the drive shaft (red arrow). A typical stall Biansuchilun transmission ratio is 3:1, that is to say three laps to

10、the input shaft and output shaft to a circle. </p><p>　　When the growth rate of car drivers choose two stalls, Plectrum will be 1 / 2-file synchronization and file a joint separation after 2 stall and lock t

11、he output shaft gear, power transmission line similar, the difference is that the output shaft gear of a stall 2 stall replaced by the output shaft gear driven. 2 stall Biansuchilun typical transmission ratio is 2.2:1, 2

12、.2 laps to the input shaft and output shaft to a circle than a stall speed increase, lower torque. </p><p>　　When refueling vehicle drivers growth stalls option 3, Plectrum to 1 / 2 back to the free file-syn

13、chronization position, and also allows the 3 / 4 file synchronization Mobile stall until 3 in the output shaft gear lock, power can be into the shaft axis - intermediate shaft - the output shaft of the three stalls Bians

14、uchilun, led through three stalls Biansuchilun output shaft. 3 stalls typical transmission ratio is 1.7:1, 1.7 laps to the input shaft and output shaft to a circle is further growth.</p><p>　　When car driver

15、s Option 4 refueling growth stalls, Plectrum will be 3 / 4 from the 3-file synchronization stall gear directly with the input shaft gear joint initiative, and power transmission directly from the input shaft to the outpu

16、t shaft, the transmission ratio at 1:1, that the input shaft and output shaft speed the same. The driving force without intermediate shaft, also known as direct file, the file transmission than the maximum transmission e

17、fficiency. Most cars run-time files are used </p><p>　　Shift into the first interval when, in a free transmission when Biansuchilun output shaft is not locked in, they cannot rotate the output shaft driven,

18、not power output. </p><p>　　General automotive manual transmission than the main 1-4 stalls, usually the first designers to determine the minimum (one stall) and maximum (4 files) transmission ratio, the mid

19、dle stall drive by geometric progression than the general distribution. In addition, there are stalls Daodang and speeding, speeding file is also known as the five stalls. </p><p>　　When the car to accelerat

20、e to more than car drivers with the choice of five stalls, and a typical five-transmission ratio is 0.87:1, which is driven by a pinion gear, the gear when the initiative to 0.87 zone, passive gear have been transferred

21、to a circle of the End. </p><p>　　Dao Dang, the opposite direction to the output shaft rotation. If one pair of meshing gears when we reverse rotation, with a middle gear, it will become the same to the rota

22、tion. Use of this principle, we should add a gear Daodang the "media" will be rotational direction reversed, it will have a Daodang axis. Daodang installed in the transmission shaft independent crust, and the i

23、ntermediate shaft parallel axis gear with the intermediate shaft and output shaft gear meshing gears, will be contrar</p><p>　　Daodang usually used for the synchronization control also joins five stalls, sta

24、lls and Daodang 5 position in the same side. As a middle gear, the general transmission Daodang transmission ratio greater than 1 file transmission ratio, by twisting, steep slope with some vehicles encountered on the pr

25、ogress stalls falters with a Daodang boost. </p><p>　　Ride from the driver of the considerations, better transmission stall, stall adjacent stall more than the transmission changes the ratio of small, and ea

26、sy to shift smoothly. However, the short comings of the stalls is more transmission structure is complicated, bulky, light vehicle transmission is generally 4-5 stalls. At the same time, transmission ratio is not integra

27、l, but with all of the decimal point, it is because of the gear teeth meshing is not caused by the whole multiples of two gear </p><p>　　Manual transmission and synchronizer</p><p>　　Manual tran

28、smission is the most common transmission, or MT. Its basic structure sum up in one sentence, is a two-axle shaft, where input shaft, the shaft axis and intermediate shaft, which constitute the main body of the transmissi

29、on and, of course, a Daodang axis. Manual transmission known as manual gear transmission, which can be in the axial sliding gears, the gears meshing different variable speed reached twisting purpose. Typical manual trans

30、mission structure and principles are as follows. </p><p>　　Input shaft also said that the first axis, and its front-end spline driven directly with the clutch disc sets with the spline , by the transfer of t

31、orque from the engine. The first axis of the intermediate shaft and gears meshing gears often, as long as the shaft axis to a turn, the intermediate shaft and gear also will be rotating. Vice also said intermediate shaft

32、 axis, the axis-even more than the size gear. Also known as the second output shaft axis, the axis of various sets of gear stall pro</p><p>　　Thus, progress stalls drive transmission path is: input shaft gea

33、r often rodents - often rodents intermediate shaft gear - corresponding intermediate shaft gear - the second axis corresponding gear. Reversing the gear shaft can be manipulated by the device pick in the axis movement, a

34、nd the intermediate shaft and output shaft gear meshing gears, to the contrary to the direction of rotation output. </p><p>　　Most cars have five stalls and a Daodang forward, a certain degree of each stall

35、transmission ratio, the majority of stalls transmission ratio greater than 1, 4 file transmission ratio of 1, known as direct stalls, and transmission ratio is less than 1 No. 5 stall called accelerated stall. Free at th

36、e output shaft gear in a position of non-engagement, unacceptable power transmission. </p><p>　　The transmission input shaft and output shaft rotational speed to their own, transform a stall when there is a

37、"synchronous". Two different rotational speed gear meshing force will impact the collision occurred, damage gear. Therefore, the old transmission shift to a "feet-off" approach, or stall on the locati

38、on of the free stay for a while by stalls in the free position refueling doors, in order to reduce the speed differential gear. However, this operation is relatively more complicated and di</p><p>　　At prese

39、nt Synchronous Transmission is based on the synchronization of inertia, mainly from joint sets, synchronous lock ring, and so on, it is characterized by friction on the role of synchronization. Splice sets Genlock engage

40、ment ring gear and the ring gear when it had Chamfer (Lock angle), Genlock within the cone ring gear engagement with the question of cone ring gear contact friction. Lock and cone angle has been made in the design of an

41、appropriate choice to be made friction cone of the t</p><p>　　The automatic gearbox</p><p>　　The automatic gearbox chooses to block the pole the equal to moving the stick shift of the gearbox,

42、having generally below several blocks:P( parking), R( pour to block), N( get empty to block), D( go forward), S( or2, namely for 2 block soon), L.( or1, namely for 1 block soon)This several an usage for blocking a right

43、usages coming driver the automatic gearbox is automotive of person to say particularly important, underneath let us very much familiar with once automatic gearbox eachly blockings</p><p>　　The usage of the P

44、 ( the parking blocks)</p><p>　　The launches the luck turns as long as choose to block the pole in driving the position, automatic gearbox car run about very easily.But park, choose to block the pole must pu

45、ll into of P, from but pass the internal parking system in gearbox moves the device will output the stalk lock lives, combining to tense the hand system move, preventing the car ambulation.</p><p>　　The usag

46、e of the R( pour to block)</p><p>　　R a control for is pouring blocking, using inside wanting slicing recording, automatic gearbox car unlike moving gearbox car so can using half moving, so while reversing t

47、he car wanting special attention accelerating pedal.</p><p>　　The usage of the N( get empty to block)</p><p>　　The N is equal to get empty to block, can while starting or hour of trailer usage.

48、At wait for the signal or block up the car will often often choose to block the pole keeps in the of D, trampling at the same time the next system move.If time is very short, do like this is an admission of, but if stop

49、the time long time had better change into of N, combine to tense the hand system moves.Because choose to block the pole in driving the position, the automatic gearbox car has generally and all to d</p><p>　　

50、The usage of the D( go forward to block)</p><p>　　Will choose to block when is normal to drive the pole put in the of D, car can at 1 ～ 4 block( or 3 block) its change to block automatically.The of D drives

51、the position most in common usely. What demand control is: Because the automatic gearbox is soon high and low with car to come to make sure to block according to the accelerator size a, so accelerate the pedal operation

52、method is different, changing to block the hour of the car is soon too not same alike.If start hour quick accelerate the pe</p><p>　　The another characteristics of the D is a compulsory low blocking, easy to

53、 high speed the hour overtakes a car, will accelerate quickly in of D drove the pedal trample after all, connect the compulsory low fend off the pass and then can reduce to block automatically, the car accelerates very q

54、uickly, after overtaking a car loosen to open the pedal of acceleration to can rise to block automatically again.</p><p>　　The usage of the S, of L low the usage that block</p><p>　　The automati

55、c gearbox in in is placed in the low blocking the scope on of S or of Ls, can usage under an etc. circumstance.It change to can make use of to launch well into of S or of Ls the mechanism move, avoiding the car wheel sy

56、stem move the machine over hot, cause the system move the effect descent while going down slope.But change into from the of D of S or of L, car soon can't higher than rise to block the car homologously soon, otherwis

57、e strong vibration in opportunity to launch, make ge</p><p>　　The is another at rain fog weather hour, if the road adheres to the term bad, can change into a position for or of L, fixing at somely first lowl

58、y blocking driving, doing not use can automatically changing blocking, in order to prevent the car beats slippery.Must keep firmly in mind at the same time, beat the slippery hour can will choose to block the pole pushes

59、 into a motive for, cutting off launching machine, toing guarantee a car the safety.</p><p><b>　　汽車變速器設(shè)計</b></p><p>　　----------英文文獻(xiàn)翻譯</p><p>　　我們知道，汽車發(fā)動機(jī)在一定的轉(zhuǎn)速下能夠達(dá)到最好的狀

60、態(tài)，此時發(fā)出的功率比較大，燃油經(jīng)濟(jì)性也比較好。因此，我們希望發(fā)動機(jī)總是在最好的狀態(tài)下工作。但是，汽車在使用的時候需要有不同的速度，這樣就產(chǎn)生了矛盾。這個矛盾要通過變速器來解決。</p><p>　　汽車變速器的作用用一句話概括，就叫做變速變扭，即增速減扭或減速增扭。為什么減速可以增扭，而增速又要減扭呢？設(shè)發(fā)動機(jī)輸出的功率不變，功率可以表示為 N = wT，其中w是轉(zhuǎn)動的角速度，T是扭距。當(dāng)N固定的時候，w與T是成

61、反比的。所以增速必減扭，減速必增扭。汽車變速器齒輪傳動就根據(jù)變速變扭的原理，分成各個擋位對應(yīng)不同的傳動比，以適應(yīng)不同的運行狀況。</p><p>　　一般的手動變速器內(nèi)設(shè)置輸入軸、中間軸和輸出軸，又稱三軸式，另外還有倒擋軸。三軸式是變速器的主體結(jié)構(gòu)，輸入軸的轉(zhuǎn)速也就是發(fā)動機(jī)的轉(zhuǎn)速，輸出軸轉(zhuǎn)速則是中間軸與輸出軸之間不同齒輪嚙合所產(chǎn)生的轉(zhuǎn)速。不同的齒輪嚙合就有不同的傳動比，也就有了不同的轉(zhuǎn)速。例如鄭州日產(chǎn)ZN6481

62、W2G型SUV車手動變速器，它的傳動比分別是：1擋3.704:１；2擋2.202:1；3擋1.414:1；4擋1:1；5擋（超速擋）0.802:1。</p><p>　　當(dāng)汽車啟動司機(jī)選擇1擋時，撥叉將1/2擋同步器向后接合1擋齒輪并將它鎖定輸出軸上，動力經(jīng)輸入軸、中間軸和輸出軸上的1擋齒輪，1擋齒輪帶動輸出軸，輸出軸將動力傳遞到傳動軸上（紅色箭頭）。典型1擋變速齒輪傳動比是3:1,也就是說輸入軸轉(zhuǎn)3圈，輸出軸轉(zhuǎn)

63、1圈。</p><p>　　當(dāng)汽車增速司機(jī)選擇2擋時，撥叉將1/2擋同步器與1擋分離后接合2擋齒輪并鎖定輸出軸上，動力傳遞路線相似，所不同的是輸出軸上的1擋齒輪換成2擋齒輪帶動輸出軸。典型2擋變速齒輪傳動比是2.2:1，輸入軸轉(zhuǎn)2.2圈，輸出軸轉(zhuǎn)1圈，比1擋轉(zhuǎn)速增加，扭矩降低。</p><p>　　當(dāng)汽車加油增速司機(jī)選擇3擋時，撥叉使1/2擋同步器回到空擋位置，又使3/4擋同步器移動直至將

64、3擋齒輪鎖定在輸出軸上，使動力可以從軸入軸—中間軸—輸出軸上的3擋變速齒輪，通過3擋變速齒輪帶動輸出軸。典型3擋傳動比是1.7:1，輸入軸轉(zhuǎn)1.7圈，輸出軸轉(zhuǎn)1圈，是進(jìn)一步的增速。</p><p>　　當(dāng)汽車加油增速司機(jī)選擇4擋時，撥叉將3/4擋同步器脫離3擋齒輪直接與輸入軸主動齒輪接合，動力直接從輸入軸傳遞到輸出軸，此時傳動比1:1，即輸出軸與輸入軸轉(zhuǎn)速一樣。由于動力不經(jīng)中間軸，又稱直接擋，該擋傳動比的傳動效率

65、最高。汽車多數(shù)運行時間都用直接擋以達(dá)到最好的燃油經(jīng)濟(jì)性。</p><p>　　換擋時要先進(jìn)入空擋，變速器處于空擋時變速齒輪沒有鎖定在輸出軸上，它們不能帶動輸出軸轉(zhuǎn)動，沒有動力輸出。</p><p>　　一般汽車手動變速器傳動比主要分上述1－4擋，通常設(shè)計者首先確定最低（1擋）與最高（4擋）傳動比后，中間各擋傳動比一般按等比級數(shù)分配。另外，還有倒擋和超速擋，超速擋又稱為5擋。</p&g

66、t;<p>　　當(dāng)汽車要加速超過同向汽車時司機(jī)選擇5擋，典型5擋傳動比是0.87:1，也就是用大齒輪帶動小齒輪，當(dāng)主動齒輪轉(zhuǎn)0.87圈時，被動齒輪已經(jīng)轉(zhuǎn)完1圈了。</p><p>　　倒擋時輸出軸要向相反方向旋轉(zhuǎn)。如果一對齒輪嚙合時大家反向旋轉(zhuǎn)，中間加上一個齒輪就會變成同向旋轉(zhuǎn)。利用這個原理，倒擋就要添加一個齒輪做“媒介”，將軸的轉(zhuǎn)動方向調(diào)轉(zhuǎn)，因此就有了一根倒擋軸。倒擋軸獨立裝在變速器殼內(nèi)，與中間軸

67、平行，當(dāng)軸上齒輪分別與中間軸齒輪和輸出軸齒輪嚙合時，輸出軸轉(zhuǎn)向會相反。</p><p>　　通常倒擋用的同步器也控制5擋的接合，所以5擋與倒擋位置是在同一側(cè)的。由于有中間齒輪，一般變速器倒擋傳動比大于1擋傳動比，增扭大，有些汽車遇到陡坡用前進(jìn)擋上不去就用倒擋開上去。</p><p>　　從駕駛平順性考慮，變速器擋位越多越好，擋位多相鄰擋間的傳動比的比值變化小，換擋容易而且平順。但擋位多的缺

68、點就是變速器構(gòu)造復(fù)雜，體積大，現(xiàn)在輕型汽車變速器一般是4－5擋。同時，變速器傳動比都不是整數(shù)，而是都帶小數(shù)點的，這是因為嚙合齒輪的齒數(shù)不是整倍數(shù)所致，兩齒輪齒數(shù)是整倍數(shù)就會導(dǎo)致兩齒輪嚙合面磨損不均勻，使得輪齒表面質(zhì)量產(chǎn)生較大的差異。</p><p><b>　　手動變速器與同步器</b></p><p>　　手動變速器是最常見的變速器，簡稱MT。它的基本構(gòu)造用一句話概

69、括，就是兩軸一中軸，即指輸入軸、軸出軸和中間軸，它們構(gòu)成了變速器的主體，當(dāng)然還有一根倒擋軸。手動變速器又稱手動齒輪式變速器，含有可以在軸向滑動的齒輪，通過不同齒輪的嚙合達(dá)到變速變扭目的。典型的手動變速器結(jié)構(gòu)及原理如下。 </p><p>　　輸入軸也稱第一軸，它的前端花鍵直接與離合器從動盤的花鍵套配合，從而傳遞由發(fā)動機(jī)過來的扭矩。第一軸上的齒輪與中間軸齒輪常嚙合，只要軸入軸一轉(zhuǎn)，中間軸及其上的齒輪也隨之轉(zhuǎn)動。中間

70、軸也稱副軸，軸上固連多個大小不等的齒輪。輸出軸又稱第二軸，軸上套有各前進(jìn)擋齒輪，可隨時在操縱裝置的作用下與中間軸的對應(yīng)齒輪嚙合，從而改變本身的轉(zhuǎn)速及扭矩。輸出軸的尾端有花鍵與傳動軸相聯(lián)，通過傳動軸將扭矩傳送到驅(qū)動橋減速器。</p><p>　　由此可知，變速器前進(jìn)擋位的驅(qū)動路徑是：輸入軸常嚙齒輪－中間軸常嚙齒輪－中間軸對應(yīng)齒輪－第二軸對應(yīng)齒輪。倒車軸上的齒輪也可以由操縱裝置撥動，在軸上移動，與中間軸齒輪和輸出軸齒

71、輪嚙合,以相反的旋轉(zhuǎn)方向輸出。</p><p>　　多數(shù)汽車都有5個前進(jìn)擋和一個倒擋，每個擋位有一定的傳動比，多數(shù)擋位傳動比大于1，第4擋傳動比為1，稱為直接擋，而傳動比小于1的第5擋稱為加速擋?？論鯐r輸出軸的齒輪處于非嚙合位置，無法接受動力傳輸。 </p><p>　　由于變速器輸入軸與輸出軸以各自的速度旋轉(zhuǎn)，變換擋位時合存在一個"同步"問題。兩個旋轉(zhuǎn)速度不一樣齒輪強(qiáng)

72、行嚙合必然會發(fā)生沖擊碰撞，損壞齒輪。因此，舊式變速器的換擋要采用"兩腳離合"的方式，升擋在空擋位置停留片刻，減擋要在空擋位置加油門，以減少齒輪的轉(zhuǎn)速差。但這個操作比較復(fù)雜，難以掌握精確。因此設(shè)計師創(chuàng)造出"同步器"，通過同步器使將要嚙合的齒輪達(dá)到一致的轉(zhuǎn)速而順利嚙合。 </p><p>　　目前全同步式變速器上采用的是慣性同步器，它主要由接合套、同步鎖環(huán)等組成，它的特點是依靠

73、摩擦作用實現(xiàn)同步。接合套、同步鎖環(huán)和待接合齒輪的齒圈上均有倒角（鎖止角），同步鎖環(huán)的內(nèi)錐面與待接合齒輪齒圈外錐面接觸產(chǎn)生摩擦。鎖止角與錐面在設(shè)計時已作了適當(dāng)選擇，錐面摩擦使得待嚙合的齒套與齒圈迅速同步，同時又會產(chǎn)生一種鎖止作用，防止齒輪在同步前進(jìn)行嚙合。當(dāng)同步鎖環(huán)內(nèi)錐面與待接合齒輪齒圈外錐面接觸后，在摩擦力矩的作用下齒輪轉(zhuǎn)速迅速降低（或升高）到與同步鎖環(huán)轉(zhuǎn)速相等，兩者同步旋轉(zhuǎn)，齒輪相對于同步鎖環(huán)的轉(zhuǎn)速為零，因而慣性力矩也同時消失，這時在

74、作用力的推動下，接合套不受阻礙地與同步鎖環(huán)齒圈接合，并進(jìn)一步與待接合齒輪的齒圈接合而完成換擋過程</p><p><b>　　自動變速器</b></p><p>　　自動變速器的選擋桿相當(dāng)于手動變速器的變速桿，一般有以下幾個擋位：P(停車)、R(倒擋)、N(空擋)、D(前進(jìn))、S(or2，即為2速擋)、L(or1，即為1速擋)。這幾個擋位的正確使用對于駕駛自動變速器汽

75、車的人來說尤其重要，下面就讓我們一起來熟悉一下自動變速器各擋位的使用要領(lǐng)。</p><p><b>　　P(停車擋)的使用</b></p><p>　　發(fā)動機(jī)運轉(zhuǎn)時只要選擋桿在行駛位置上，自動變速器汽車就很容易地行走。而停放時，選擋桿必須扳入P位，從而通過變速器內(nèi)部的停車制動裝置將輸出軸鎖住，并拉緊手制動，防止汽車移動。</p><p><

76、;b>　　R(倒擋)的使用</b></p><p>　　R位為倒擋，使用中要切記，自動變速器汽車不像手動變速器汽車那樣能夠使用半聯(lián)動，故在倒車時要特別注意加速踏板的控制。</p><p><b>　　N(空擋)的使用</b></p><p>　　N位相當(dāng)于空擋，可在起動時或拖車時使用。在等待信號或堵車時常常將選擋桿保持在D位，

77、同時踩下制動。若時間很短，這樣做是允許的，但若停止時間長時最好換入N位，并拉緊手制動。因為選擋桿在行駛位置上，自動變速器汽車一般都有微弱的行駛趨勢，長時間踩住制動等于強(qiáng)行制止這種趨勢，使得變速器油溫升高，油液容易變質(zhì)。尤其在空調(diào)器工作、發(fā)動機(jī)怠速較高的情況下更為不利。有些駕駛員為了節(jié)油，在高速行駛或下坡時將選擋桿扳到N位滑行，這很容易燒壞變速器，因為這時變速器輸出軸轉(zhuǎn)速很高，而發(fā)動機(jī)卻在怠速運轉(zhuǎn)，油泵供油不足，潤滑狀況惡化，易燒壞變速器

78、。</p><p><b>　　D(前進(jìn)擋)的使用</b></p><p>　　正常行駛時將選擋桿放在D位，汽車可在1～4擋(或3擋)之間自動換擋。D位是最常用的行駛位置。需要掌握的是：由于自動變速器是根據(jù)油門大小與車速高低來確定擋位的，所以加速踏板操作方法不同，換擋時的車速也不相同。如果起步時迅速將加速踏板踩下，升擋晚，加速能力強(qiáng)，到一定車速后，再將加速踏板很快松開

79、，汽車就能立即升擋，這樣發(fā)動機(jī)噪聲小，舒適性好。</p><p>　　D位的另一個特點是強(qiáng)制低擋，便于高速時超車，在D位行駛中迅速將加速踏板踩到底，接通強(qiáng)制低擋開關(guān)就能自動減擋，汽車很快加速，超車之后松開加速踏板又可自動升擋。</p><p><b>　　S、L位低擋的使用</b></p><p>　　自動變速器在S位或L位上處于低擋范圍，可以

80、在坡道等情況下使用。下坡時換入S位或L位能充分利用發(fā)動機(jī)制動，避免車輪制動器過熱，導(dǎo)致制動效能下降。但是從D位換入S位或L位時，車速不能高于相應(yīng)的升擋車速，否則發(fā)動機(jī)會強(qiáng)烈振動，使變速器油溫急劇上升，甚至?xí)p壞變速器。</p><p>　　另外在雨霧天氣時，若路面附著條件差，可以換入S位或L位，固定在某一低擋行駛，不要使用能自動換擋的位置，以免汽車打滑。同時必須牢記，打滑時可將選擋桿推入N位，切斷發(fā)動機(jī)的動力，以