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4AT gear transmission system

A technology of gear transmission and sun gear, applied in the direction of gear transmission, transmission, belt/chain/gear, etc., can solve the problems of large radial size, complex structure, difficult layout, etc., and achieve small radial size and transmission efficiency High, gear-less effect

Active Publication Date: 2012-06-13
HEFEI UNIV OF TECH
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AI Technical Summary

Problems solved by technology

However, compared with fixed shaft gear transmission, its disadvantages are: complex structure, difficult manufacture and installation, and the transmission efficiency of hydraulic automatic transmission is lower than that of manual transmission
Due to the fixed shaft gear transmission system, the double clutch automatic transmission has high transmission efficiency and good fuel economy; but because of the fixed shaft gear transmission, compared with the hydraulic automatic transmission, the radial dimension of the dual clutch automatic transmission Larger, so it is relatively difficult to arrange on the car
And because the dual-clutch automatic transmission is developed from the parallel-shaft manual transmission, the number of gears used is relatively large, so the processing cost may be higher

Method used

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  • 4AT gear transmission system
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Embodiment Construction

[0014] figure 1 Among them, the right driving wheel shaft III is concentric with the left driving wheel shaft IV, the left driven wheel 2 and the right driven wheel 4 are coaxial with the driven wheel shaft V, the output gear shaft VI is the input shaft of the single-row planetary gear transmission system, and the first clutch C1 is used to control the engagement of the input shaft I with the right drive shaft III, the second clutch C2 is used to control the engagement of the input shaft I with the left drive shaft IV, and the third clutch C3 is used to control the engagement of the output gear shaft VI with the sun gear shaft VII , the fourth clutch C4 is used to control the engagement of the planetary carrier H with the output gear shaft VI, the first brake B1 is used to control the braking of the sun gear 6 , and the second brake B2 is used to control the braking of the planetary carrier H.

[0015] Such as figure 1 As shown, the 4AT gear transmission system in this embodi...

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Abstract

The invention discloses a 4AT gear transmission system, which is characterized by being formed by connecting a fixed-axis gear transmission system and a single-row planetary gear transmission system in series. Compared with a hydraulic automatic transmission, the system of the invention comprises the fixed-axis system and has higher transmission efficiency. Compared with the automatic transmission with double clutches, the system of the invention adopts less gears and has smaller radial dimensions because of adopting a transmission mode that the planetary gear transmission system and the fixed-axis gear transmission system are connected in series.

Description

technical field [0001] The invention relates to an automatic transmission transmission system, in particular to a four-speed automatic transmission for automobiles. Background technique [0002] At present, there are mainly two forms of gear transmission in automotive automatic transmissions: planetary gear transmission and fixed shaft gear transmission. The representative of planetary gear transmission is hydraulic automatic transmission AT, and the representative of fixed shaft gear transmission is dual clutch automatic transmission DCT. Hydraulic automatic transmissions often use two or more rows of planetary gear trains to transmit power in series. Compared with fixed shaft gear transmission, planetary gear transmission has a series of unique advantages, namely: planetary transmission is a kind of constant mesh transmission, which is especially beneficial to realize power shift or automatic shift; it is a coaxial transmission, which is different from fixed shaft transmis...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16H3/44
Inventor 赵韩黄康陈奇张祖芳公彦军王雪瑶
Owner HEFEI UNIV OF TECH
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