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Eight-speed double-clutch automatic transmission

An automatic transmission and dual-clutch technology, which is applied in the field of vehicle transmission system, can solve the problems of short axial length, reduce the reliability of transmission, increase the difficulty of gear design, etc., and achieve the goal of shortening the radial length, shortening the axial length and simplifying the structure Effect

Pending Publication Date: 2018-04-17
昆山德拉特兰传动科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Taking "A Dual Clutch Automatic Transmission for Vehicles" (CN201310442936) disclosed in Chinese patent literature as an example, there are only 4 gears on the input axis, making the axial length short
However, since there are too many shared driving gears, and the driving gears are the weaker gears in the gear pair, the difficulty of gear design is increased and the reliability of the transmission is reduced.

Method used

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  • Eight-speed double-clutch automatic transmission
  • Eight-speed double-clutch automatic transmission

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Such as figure 1 As shown, the eight-speed dual-clutch automatic transmission used in automobiles includes two first automatic clutches C1 and second automatic clutches C2 on the same axis, a first input shaft 1, a second input shaft 2, and a first output shaft 3. , The second output shaft 4, the first main reduction driving gear 30, the second main reduction driving gear 40, the main reduction gear 50, and the differential 5. The crankshaft of the engine is connected to the housing of the dual clutch through a flexible disc. The two input shafts 1, 2 and the two output shafts 3, 4 are arranged parallel to each other. The dual clutch 100 includes a first automatic clutch C1 and a second automatic clutch C2. The first automatic clutch C1 includes a first driving disc and a first driven disc. The first driving disc and the housing of the dual clutch are connected by spline sliding. It also transmits torque. The first driven disc and the first input shaft 1 are splined to ...

Embodiment 2

[0053] Such as figure 2 As shown, compared with Embodiment 1, the eight-speed dual-clutch automatic transmission shown in Embodiment 2 differs in that: the second input shaft 2 is sequentially fixed with a fourth-speed driving gear 24 and a sixth-speed driving gear from the end away from the dual clutch. Gear 26, second-speed driving gear 22, fourth-speed driven gear 34 are correspondingly sleeved on the first output shaft 3, and sixth-speed driven gear 46 is correspondingly sleeved on the second output shaft 4; correspondingly, the fourth-speed synchronizer S4 is set On the first output shaft 3, the sixth-speed synchronizer S6 is provided on the second output shaft 4, and the eighth-speed synchronizer S8 is fixed on the fifth-speed driven gear 35 and can be engaged with and separated from the fourth-speed driven gear 34; It can ensure that the eighth gear ratio is smaller than the seventh gear ratio to meet actual requirements.

[0054] In other embodiments, it can also be arr...

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Abstract

The invention discloses an eight-speed double-clutch automatic transmission which comprises double clutches, a first input shaft, a second input shaft, a first output shaft, a second output shaft anda differential mechanism. The first input shaft is coaxially sleeved with the second input shaft. The first input shaft is fixedly provided with a first-reverse-gear drive gear, a fifth-seventh-gear drive gear and a third-gear drive gear. The second input shaft is fixedly provided with a sixth-gear drive gear, a fourth-gear drive gear and a second-gear drive gear. The first output shaft is sleevedwith a first-gear driven gear, a fifth-gear driven gear, a sixth-gear driven gear and a second-gear driven gear. The second output shaft is sleeved with a reverse-gear driven gear, a seventh-gear driven gear, a third-gear driven gear and a fourth-gear driven gear. The first output shaft is provided with a first-gear synchronizer, a fifth-gear synchronizer, a second-gear synchronizer and a sixth-gear synchronizer. The second output shaft is provided with a reverse-gear synchronizer, a seventh-gear synchronizer, a third-gear synchronizer and a fourth-gear synchronizer, and an eighth-gear synchronizer is fixed to the fifth-gear driven gear. The first output shaft and the second output shaft are connected with the differential mechanism through a first main speed reduction drive gear, a second main speed reduction drive gear and a main speed reduction gear. By means of the eight-speed double-clutch automatic transmission, the axial length and the radial length of the transmission are effectively shortened, and the structure is simplified.

Description

Technical field [0001] The invention relates to the field of vehicle transmission systems, in particular to an eight-speed dual-clutch automatic transmission applied to a vehicle powered by an internal combustion engine. Background technique [0002] During the development process, automobiles powered by internal combustion engines are facing the challenge of continuously improving efficiency under the premise of ensuring power and comfort. Compared with traditional hydraulic torque converters and planetary gear automatic transmissions, dual-clutch automatic transmissions are more efficient, have shorter shift times, and have obvious advantages. Generally speaking, a dual-clutch automatic transmission with more gears can increase the transmission ratio range, which is conducive to increasing the wheel torque at starting and reducing the working speed of the engine, thereby improving the system efficiency and power performance of the powertrain. However, as the number of gears in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16H3/085F16H3/12F16H57/023
CPCF16H3/006F16H3/085F16H3/12F16H57/023F16H2200/2035F16H2200/006F16H2057/02086F16H2057/02043
Inventor 何祥延袁一卿张寅
Owner 昆山德拉特兰传动科技有限公司
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