Dual-clutch automatic transmission device

Abstract

Disclosed is a dual-clutch automatic transmission device. The dual-clutch automatic transmission device comprises an inner input shaft, an outer input shaft, two countershafts, a dual clutch, a differential assembly, a plurality of normally-engaged gear sets and a plurality of synchronizer devices, wherein the inner input shaft and the outer input shaft are coaxially arranged, and the normally-engaged gear sets are arranged on the shafts respectively. The dual-clutch automatic transmission device is characterized in that a first-speed gear and a second-speed gear serve as low-speed gears and are arranged at the shaft ends of a shaft system of a gearbox respectively; a first-speed driven gear and a reverse driven gear are arranged on the same countershaft; the center distance between the countershaft where the first-speed driven gear is located and the inner input shaft is larger than that between the other countershaft and the inner input shaft, and the center distance between the countershaft where the first-speed driven gear is located and the outer input shaft is larger than that between the other countershaft and the outer input shaft. The dual-clutch automatic transmission device can provide seven or six forward gears and one reverse gear and has the advantages that the structure is simple, reverse motion safety is high, the number of gears is large and the gear transmission ratio degree and the freedom are high, and therefore the dual-clutch automatic transmission device is excellent in comfort performance and lower in oil consumption.

Description

technical field [0001] The invention belongs to the technical field of vehicle (automotive) transmissions, and in particular relates to a double-clutch automatic transmission device. Background technique [0002] Comfort, handling and high efficiency and economy are all very important performance indicators of vehicles and transmissions. In the application of traditional manual transmissions and automatic transmissions, the above performance aspects are all at the expense of the other. Choosing high handling and high efficiency and economy means low comfort; choosing high comfort means making compromises in handling and economy. [0003] However, the adoption of the new dual clutch transmission (Dual Clutch Transmission) can satisfy people's comprehensive demands on the above performance to the greatest extent. Dual-clutch transmissions can provide high efficiency and higher controllability comparable to manual transmissions, and can meet people's needs for vehicle economy ...

AI Technical Summary

Problems solved by technology

[0004] Existing dual-clutch transmissions tend to be more and more compact in structure, resulting in fewer gears in the transmission, which affects the smoothness of the transmission's shifting, which means affecting the driving comfort of the vehicle; or leads to more gears, but There are too many shared gear sets, which affects the degree of freedom of the transmission ratio of each gear of the transmission, and it is difficult to match with different vehicles; some dual-clutch transmissions are equipped with a reverse gear shaft, which makes the number of transmission parts more and the cost of the transmission is higher.

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