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Nine-gear automatic transmission

An automatic transmission, nine-speed technology, applied in the direction of vehicle gearboxes, transmission devices, transmission components, etc., can solve the problems of well-graded transmission ratio series and large transmission ratio range, difficult to provide slightly gradual, complex, etc., to reach the transmission range Adequate, compact, well-graded effects

Active Publication Date: 2019-02-22
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 well-graded ratio series and a wide range of ratios provide a nine-speed automatic transmission

Method used

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Embodiment Construction

[0100] The present invention is described in detail below in conjunction with accompanying drawing:

[0101] 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 a nine-gear automatic transmission, belongs to the technical field of automatic transmissions, solves the problems that in the existing automatic transmission technology, morecomponents and a complicated structure are provided, particularly a transmission ratio series which is slightly progressive and is excellent in grading is difficult to be provided and the transmissionratio range is large. The nine-gear automatic transmission comprises four planet wheel sets sequentially arranged front and back along a main rotary shaft, nine rotatable shafts, two brakes and fourclutches, and six gearshift switching elements are provided in total; the gearshift switching elements allow to be selectively controlled, so that nine forward gears and one reverse gear are formed between the input shaft and the output shaft of the transmission; the input shaft is detachably connected with a sixth shaft connected with a fourth planet carrier via the first clutch and is detachablyconnected with a ninth shaft connected with a second sun wheel via the second clutch; a third shaft connected with a first sun wheel is detachably connected via the first brake; and the output shaftis connected with a fourth gear ring.

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 nine-speed automatic transmission. Background technique [0002] The powertrain of a motor vehicle consists of an engine, a nine-speed automatic transmission and a differential or final drive. A nine-speed automatic transmission enhances the vehicle's overall operating range 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 transmiss...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16H3/66
CPCF16H3/66F16H2200/2046F16H2200/0065F16H2200/2012
Inventor 薛焕樟张建黄宏疆陆剑华陆腾轩李文康
Owner ZHAOQING UNIV
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