Planetary gear train for an automatic transmission of a vehicle
A technology of planetary gear train and automatic transmission, which is applied in the direction of vehicle gearboxes, vehicle components, gear transmissions, etc., and can solve the problem of little improvement in power performance and fuel economy, difficulty in guaranteeing the linear relationship of step ratio, and driving efficiency of the engine. Improve the efficiency of torque transmission and durability, improve the efficiency of power transmission and fuel efficiency, and improve the driving performance
Active Publication Date: 2022-03-11
HYUNDAI MOTOR CO LTD +1
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Problems solved by technology
[0009] Conventional eight-speed automatic transmissions have a gear ratio span of 6.5-7.5 (gear ratio span is an important factor in ensuring the linear relationship of the step ratio), so the improvement in power performance and fuel economy may not be large
[0010] In addition, if the eight-speed automatic transmission has a gear ratio span greater than 9.0, it is difficult to ensure the linear relationship of the step ratio
Therefore, the driving efficiency of the engine and the drivability of the vehicle may deteriorate
Method used
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[0036] The following description is merely exemplary in nature and is not intended to limit the invention, application or uses. It should be understood that throughout the drawings, corresponding reference numerals indicate like or corresponding parts and features.
[0037] Hereinafter, exemplary forms of the present invention will be described in detail with reference to the accompanying drawings.
[0038] However, in order to clearly describe the exemplary forms of the present invention, parts irrelevant to the description are omitted.
[0039] In the following description, since the names of components are the same as each other, the names of the components are divided into first, second, etc. in order to distinguish the names, and the order thereof is not particularly limited.
[0040] figure 1 is a schematic diagram of a planetary gear train according to a first exemplary form of the invention.
[0041] refer to figure 1 , the planetary gear train includes: first, sec...
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A planetary gear train for an automatic transmission of a vehicle is disclosed. The planetary gear train may include: an input shaft receiving torque from the engine; an output shaft outputting torque; a first planetary gear set including first, second and third rotation elements; a second planetary gear set including a first 4. Fifth and sixth rotation elements; a third planetary gear set including seventh, eighth and ninth rotation elements; a fourth planetary gear set including tenth, eleventh and twelfth rotation elements; A fifth planetary gear set including thirteenth, fourteenth and fifteenth rotating elements. In addition, the planetary gear train includes nine shafts operatively connected to at least one rotating element to provide ten forward speed steps and one reverse speed step, enabling more efficient power transmission performance and smoother speed steps transform.
Description
[0001] Cross-references to related applications [0002] This application claims priority and benefit from Korean Patent Application No. 10-2017-0006059 filed on January 13, 2017, the entire contents of which are hereby incorporated by reference. technical field [0003] The present invention relates to an automatic transmission for vehicles with improved power transmission performance and fuel economy. Background technique [0004] The statements in this section merely provide information related to the present disclosure and may not constitute prior art. [0005] In general, automatic transmissions implementing more speed stages have been developed to enhance fuel efficiency and improve drivability. [0006] It is hoped that this automatic transmission with more speed ranges will improve power performance and driving efficiency while pursuing engine downsizing. In particular, it is desirable for an efficient multi-speed transmission to have very good step ratio linearity...
Claims
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IPC IPC(8): F16H3/62
CPCF16H3/62F16H2200/0069F16H2200/2046F16H2200/2015F16H3/66
Inventor 金珍镐黄铜焕朴钟述金钟洙李炅勋
Owner HYUNDAI MOTOR CO LTD