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Automatic transmission unit

A technology of automatic transmission and brake, which is applied in the direction of transmission, gear transmission, belt/chain/gear, etc., can solve the problems of large transmission ratio range, difficult to provide, complex structure, etc., and achieve large transmission ratio range, good classification, The effect of high transmission efficiency

Active Publication Date: 2019-05-17
彭建新
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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 complex structure in the existing automatic transmission technology, especially the problem that it is difficult to provide a slightly progressive, well-graded transmission ratio series and a large transmission ratio range, and to provide an automatic transmission unit

Method used

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Embodiment Construction

[0098] The present invention will be described in detail below in conjunction with the drawings:

[0099] figure 1 An embodiment of an automatic transmission unit is shown, which is configured as a motor vehicle automatic transmission unit. The automatic transmission unit has four planetary gear sets P1, P2, P3, and 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 arranged one after another along the main rotation axis. All planetary gear sets P1, P2, P3, P4 of the automatic transmission unit have planetary gear sets with negative gear ratios. The transmission unit has six shift switching elements B1, B2, C1, C2, C3, C4. These shift switching elements are set to shift exactly nine forward automatic transmission gears V1, V2, V3, V4, V5, V6, V7, V8, V9 and one reverse VR. However, the automatic transmission unit can also work with only eight forward transmission gears, for example, ...

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Abstract

The invention discloses an automatic transmission unit, and belongs to the technical field of automatic transmission. The problems that the structure is complex in the existing automatic transmissiontechnology, particularly, a slightly progressive and hierarchical good transmission ratio series and a large transmission ratio range are difficult to provide are overcome. The automatic transmissionunit comprises four planetary gear sets which are sequentially arranged along the front and back of a main rotating shaft; nine rotatable shafts; two brakes and four clutches, six gear shifting switching elements, the gear shifting switching elements are allowed to be selectively actuated such that nine forward gears and one reverse gear are formed between an input shaft and an output shaft of thetransmission; the input shaft is detachably connected to a seventh shaft connected to a first sun gear via a first clutch and is detachably connected to an eighth shaft connected to a second planetary carrier via a second clutch, and a third shaft connected to a fourth sun gear is connected to a shell through a first brake; and the output shaft is connected with the first gear ring 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 a motor vehicle, and in particular to an automatic transmission of an automobile. Background technique [0002] The powertrain of a motor vehicle includes an engine, an automatic transmission unit, and a differential or final drive. The automatic transmission unit increases the entire operating range of the vehicle by allowing the engine to be operated multiple times within 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. The small number of forward gears will limit the entire speed range of the vehicle, and therefore require a relatively large engine to produce a wide range of speed and torque. [0003] At present, four-speed automatic transmissions, especially automatic tra...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16H3/66
Inventor 彭建新薛焕樟
Owner 彭建新
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