輕型貨車變速器設計【東風EQ1092】【三軸五擋式變速器】
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黑龍江工程學院本科生畢業(yè)設計附錄外文文獻Dual clutch transmissionFrom Wikipedia, the free encyclopediaA dual clutch transmission, commonly abbreviated to hoop DCT (sometimes informally referred to as a twin-clutch gearbox, double clutch transmission, or similar variations thereof), is a differing type of semi-automatic or automated manual automotive transmission. It utilises two separate clutches for odd and even gear sets. It can fundamentally be described as two separate manual transmissions (with their respective clutches) contained within one housing, and working as one unit. They are usually operated in a fully automatic mode, and many also have the ability to allow the driver to manually shift gears, albeit still carried out by the transmissions electro-hydraulics.This type of transmission was invented by Frenchman Adolphe Kgresse just prior to World War II but he never developed a working model. The first actual DCTs arrived from Porsche in-house development, for Porsche racing cars in the 1980s, when computers to control the transmission became compact enough: the Porsche Doppelkupplungsgetriebe (English: dual clutch gearbox) (PDK) used in the Porsche 956 and 962 Le Mans race cars from 1983, and the Audi Sport Quattro S1 rally car. A dual clutch transmission eliminates the torque converter as used in conventional epicyclic-geared automatic transmissions. Instead, dual clutch transmissions that are currently on the market primarily use two oil-bathed wet multi-plate clutches, similar to the clutches used in most motorcycles, though dry clutch versions are also available. The first series production road car to be fitted with a DCT was the 2003 Volkswagen Golf Mk4 R32. As of 2009, the largest number of sales of DCTs in Western Europe are by various marques of the German Volkswagen Group, though this is anticipated to lessen as other transmission makers and vehicle manufacturers make DCTs available in series production automobiles. In 2010, on BMW Canadas website for the 3 Series Coupe, it is described both as a 7-speed double clutch transmission and as a 7-speed automatic transmission. It is actually a dual clutch semi-automatic. In DCTs where the two clutches are arranged concentrically, the larger outer clutch drives the odd numbered gears, whilst the smaller inner clutch drives the even numbered gears. Shifts can be accomplished without interrupting torque distribution to the driven roadwheels, by applying the engines torque to one clutch at the same time as it is being disconnected from the other clutch. Since alternate gear ratios can pre-select an odd gear on one gear shaft whilst the vehicle is being driven in an even gear, (and vice versa), DCTs are able to shift more quickly than other cars equipped with single-clutch automated-manual transmissions (AMTs), a.k.a. single-clutch semi-automatics. Also, with a DCT, shifts can be made more smoothly than with an AMT, making a DCT more suitable for conventional road cars.Characteristic of Dual clutch gearboxAdvantages: 1. Compared with the traditional planetary gear type automatic gearbox fuel economy is more advantageous to the ascension can reduce fuel consumption about 15 percent 2. During the shift, almost no damage 3. When high-grade gear is already in preparation condition, rise against extremely fast, achieve astonishing 8 millisecond 4. No matter what is running mode accelerator or condition, can reach 600 shift time (at least from the odd block to millisecond odd block, or even block drop from even when it took about block, for 900 milliseconds, for example from the first five block to 3 block) Faults: 1. The electric control system and hydraulic system due to the existence of gearbox efficiency, double clutch than traditional manual gearbox still used to deliver big torque, especially the wet dual clutch gearbox is even more so 2. Dual clutch gearbox cost is higher, the development of precision and complex double clutch, resulting in higher prices 3. When need to switch gears in preparation condition, not shift time relatively long, in some cases even more than 1 second 4. Dual clutch gearbox, compared with the traditional manual gearbox heavier 5. Dual clutch the biggest transfer torque transmission on the low side, restrain the engine of space 6. Early dual clutch gearbox reliability poor 7. Gearbox lubricant need according to factories require change regularly, and replacement costs is not cheap 附錄外文文獻翻譯雙離合變速器雙離合變速器是當前發(fā)展最迅速的新型變速箱,它以傳統(tǒng)手動變速箱為基礎加入雙和電控組件,獲得優(yōu)異的性能表現和良好的燃油經濟性。已經成為繼可變正時、可變氣門升程、和之后的又一個技術亮點。 簡單說來DCT是兩個傳統(tǒng)手動變速箱的集合體(分別為奇數和偶數擋),擁有兩個離合器,兩根輸入軸,但僅有一根輸出軸。離合器的分離與接合,以及擋位切換都在電腦的掌控下通過液壓機構進行控制,因此也能提供手動換擋模式。動力傳遞效率高(意味著低)、擋位切換迅速和成本低于傳統(tǒng)自動變速箱是雙離合器變速箱的三大優(yōu)勢,因此得到越來越廣泛的應用。 雙離合器變速箱由法國人Adolphe Kgresse在二戰(zhàn)前發(fā)明,計劃用于配備充滿傳奇色彩的Traction,但當時的市場狀況并不適合商業(yè)應用。雙離合器變速箱在等待了半個后才開始配備民用車。 上世紀80年代初,自行研發(fā)了全球首臺雙離合器變速箱,利用電控系統(tǒng)將雙離合器變速箱的結構變得足夠緊湊,稱為Doppelkupplungsgetriebe(德語,簡稱PDK)。首款PDK雙離合器變速箱搶先配備956和962賽車,以及SportS1拉力賽車,并獲得不俗戰(zhàn)績。但賽場與市場畢竟存在不小的距離,雙離合器又花費了二十年降低成本和提升耐用度才成功實現商用。 于2002年為R32(第四代,PQ34平臺,2003款)配備(Direct-ShiftGearbox)雙離合器變速箱,這是雙離合器變速箱首次配備量產車。與傳統(tǒng)自動變速箱相比,大眾的這臺DSG省去了液力變矩器和行星齒輪組,取而代之的是濕式雙離合器和簡單的斜齒輪。隨后,成為DCT普及速度最快,應用最為廣泛的汽車制造商,從A0級小車Polo到全球最強悍的超級都有配備。雙離合器是一個非常緊湊而精密的部件,也是DCT的核心,外部稍大一些的離合器負責奇數擋的動力接合和中斷,內部稍小一些的離合器負責偶數擋的動力接合和中斷。兩個離合器的分離和接合同時進行,因此傳遞到輪的動力幾乎不會出現中斷。當奇數擋離合器分離的同時,接合偶數擋離合器,反之亦然??刂齐娔X根據轉速、車速和節(jié)氣門開度等信息對擋位進行預判,例如在二擋加速時,三擋已進入預備狀態(tài),從二擋切換到三擋的過程只是偶數擋離合器分離和奇數擋離合器接合的過程,并且兩個動作同時間進行。因此DCT的換擋速度通常說來相比僅有一個離合器的變速箱(結構基于手動變速箱,用于高性能和跑車)更快。 雙離合器變速箱的特點 優(yōu)點: 1.相比傳統(tǒng)行星齒輪式自動變速箱更利于提升燃油經濟性,油耗大約能夠降低15%2.在換擋過程中,幾乎沒有損失 3.當高擋齒輪已處于預備狀態(tài)時,升擋速度極快,達到驚人的8毫秒 4.無論油門或者運轉模式處于何種狀況,換擋時間至少能達到600毫秒(從奇數擋降到奇數擋,或者從偶數擋降偶數擋時,耗時約為900毫秒,例如從第5擋降到3擋) 缺點: 1.由于電控系統(tǒng)和液壓系統(tǒng)的存在,雙離合器變速箱的效率仍然不及傳統(tǒng)手動變速箱,特別是用于傳遞大扭矩的濕式雙離合器變速箱更是如此 2.雙離合器變速箱的研制費用較高,雙離合器精密而復雜,導致車價偏高 3.當需要切換的擋位并未處于預備狀態(tài)時,換擋時間相對較長,在某些情況下甚至超過1秒 4.雙離合器變速箱相比傳統(tǒng)手動變速箱更重 5.雙離合器變速箱的最大傳遞扭矩偏低,限制了發(fā)動機的空間 6.早期的雙離合器變速箱可靠性欠佳 7.變速箱潤滑油需要根據廠家要求定期更換,并且更換費用并不便宜。6
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東風EQ1092
三軸五擋式變速器
輕型貨車變速器設計【東風EQ1092】【三軸五擋式變速器】
輕型
貨車
變速器
設計
東風
eq1092
三軸五擋式
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