Double-clutch transmission with long idler shaft

Abstract

The invention discloses a double-clutch transmission with a long idler shaft. Particularly, the double-clutch transmission comprises seven forward gears, a reverse gear, four synchronizers and the long idler shaft, each synchronizer is selectively connected with two gears, and a driving gear of each gear in the transmission is an independent gear. The double-clutch transmission has the advantages that by the design of the transmission structure with the seven forward gears, an engine has better economical efficiency and power performance; the seven forward gears and the reverse gear are more reasonable in arrangement and convenient to assemble; each synchronizer is effective on the two gears simultaneously, so that the synchronizers are fully utilized; all the driving gears are the independent gears, so that tooth number design is facilitated, and convenience is brought to speed ratio matching; by the long idler shaft structure, balance of the internal structure of the transmission is improved, integral arrangement is smoother, and a shell of the transmission is regular.

Description

technical field [0001] The invention relates to a dual-clutch gearbox, in particular to a dual-clutch gearbox with seven forward gears and a long idler shaft. Background technique [0002] The concept of dual clutch transmission (DCT) has a history of sixty or seventy years. As early as 1939, Germany's Kegresse.A was the first to apply for a patent for a dual-clutch transmission, and proposed the design concept of dividing the manual transmission into two parts. One part transmits odd-numbered gears, and the other part transmits even-numbered gears. A clutch connects the two input shafts, and the driven gears of adjacent gears mesh with the gears of the two input shafts. Cooperating with the control of the two clutches, the transmission ratio can be converted without cutting off the power, thereby shortening the shifting time and effectively improving the gear ratio. Shift quality. [0003] China's auto market will undergo significant changes in the next few years: regulat...

AI Technical Summary

Problems solved by technology

[0004] In the prior art, as mentioned in CN1621715, a known dual-clutch gearbox is designed for six forward gears, and adopts a short idler shaft and three sets of duplex mechanisms. The design influence of the short idler shaft Balanced, uneven layout, and overall unevenness; compared with seven forward gears, the design of six forward gears is less economical and dynamic, and the loss of engine efficiency is high; three sets of double-link mechanisms increase the difficulty of gear ratio, Difficult to achieve the requirements of the vehicle speed ratio

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