Multi-gear automobile automatic transmission

An automatic transmission and automobile technology, which is applied in vehicle gearboxes, multi-ratio transmissions, transmission components, etc., can solve the problems of difficulty in providing step-intensive transmission ratio series, meshing efficiency, complexity, etc., and achieve sufficient transmission range and transmission ratio The effect of dense and large number of gears

Active Publication Date: 2019-02-15
ZHAOQING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to overcome the relatively large number of components and complex structure in the existing automatic transmission technology, especially it is difficult to provide a slightly progressive, A multi-speed automatic transmission for automobiles is provided for the problem of stepping dense transmission ratio series and good meshing efficiency

Method used

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Embodiment Construction

[0098] The present invention is described in detail below in conjunction with accompanying drawing:

[0099] figure 1 An exemplary embodiment of an automatic transmission unit, which is designed as a motor vehicle automatic transmission unit, is shown. The automatic transmission unit has four planetary gear sets P1, P2, P3, P4. The first planetary gear set P1, the second planetary gear set P2, the third planetary gear set P3 and the fourth planetary gear set P4 are successively arranged along the main rotation axis. All planetary gear sets P1, P2, P3, P4 of the automatic transmission unit have negative gear ratio planetary gear sets. The transmission unit has six shifting elements B1, B2, C1, C2, C3, C4. The shifting elements are provided for shifting exactly nine forward automatic transmission gears V1, V2, V3, V4, V5, V6, V7, V8, V9 and one reverse gear VR. However, the automatic transmission unit can also be operated with only eight forward transmission gears, for examp...

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Abstract

The invention discloses a multi-gear automobile automatic transmission, and belongs to the technical field of automatic transmissions. The problems that in the prior art, automatic transmissions are large in component number and complex in structures and cannot provide a slightly progressive and densely classified transmission ratio series and good engagement efficiency especially are solved. Themulti-gear automobile automatic transmission comprises four planet gear sets arranged one behind the other along a main rotation axis, nine rotatable shafts, and six shifting switching elements; the shifting switching elements are allowed to be selectively operated, thus, nine forward gears and a reverse gear are formed between an input shaft and an output shaft of the transmission; the input shaft is connected with a sixth shaft connected to a third planet carrier through a first clutch in a releasable mode and connected with an eighth shaft of a fourth sun gear through a second clutch in a releasable mode; the third shaft is connected with a first sun gear and a second planet carrier and connected to a housing through a first brake; and the output shaft is connected with a third ring gear and a fourth planet carrier.

Description

technical field [0001] The invention belongs to the technical field of automatic transmissions, and relates to an automatic transmission unit, in particular to a power transmission system for motor vehicles, in particular to a multi-speed automatic transmission for automobiles. Background technique [0002] The powertrain of a motor vehicle consists of an engine, a multi-speed transmission, and a differential or final drive. A multi-speed transmission increases the overall operating range of the vehicle by allowing the engine to be operated multiple times through its torque range. The number of forward speed ratios (forward gears) available in the transmission determines the number of times the engine torque range is repeated. A low number of forward gears limits the overall speed range of the vehicle and thus requires a relatively large engine to produce a wide speed and torque range. [0003] At present, the four-speed automatic transmission, especially the automatic tra...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16H3/66
CPCF16H3/66F16H2200/0065F16H2200/2012F16H2200/2046
Inventor 薛焕樟张建利航邓伟任邓浩镇林坤吉
Owner ZHAOQING UNIV
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