an 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: 2022-04-08
彭建新
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  • 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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  • an automatic transmission unit
  • an automatic transmission unit

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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. These shifting elements are provided for switching 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...

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Abstract

The invention discloses an automatic transmission unit, which belongs to the technical field of automatic transmissions; it overcomes the complex structure in the existing automatic transmission technology, especially the problem that it is difficult to provide a slightly progressive and well-graded transmission ratio series and a large transmission ratio range; Including four planetary gear sets arranged one after another along the main rotation axis; nine rotatable shafts; two brakes and four clutches, a total of six shifting elements, which allow selective manipulation Nine forward gears and one reverse gear are formed between the transmission input shaft and the output shaft; the input shaft is releasably connected to the seventh shaft connected to the first sun gear via the first clutch and connected to the seventh shaft via the second clutch The eighth shaft of the second planet carrier is detachably connected, the third shaft connected to the fourth sun gear is connected to the casing via the first brake; the output shaft is connected to the first ring gear and the 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 an automatic transmission for automobiles. Background technique [0002] The powertrain of a motor vehicle consists of an engine, an automatic transmission unit and a differential or final drive. The automatic transmission unit increases the overall 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. 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 transmi...

Claims

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Application Information

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