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Planetary gear train of automatic transmission for vehicle

A technology of automatic transmission and planetary gear system, which is applied to vehicle gearboxes, vehicle components, gear transmissions, etc., can solve the problems of poor linearity of shifting gear ratios of eight-speed automatic transmissions, and improve flexibility and reduce Resistance loss, effect of improving linearity

Active Publication Date: 2018-11-23
HYUNDAI MOTOR CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] In addition, we also found that the eight-speed automatic transmission becomes less linear in the step ratio linearity of the shifting gears even though the ratio span can be raised above 9 levels

Method used

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  • Planetary gear train of automatic transmission for vehicle
  • Planetary gear train of automatic transmission for vehicle
  • Planetary gear train of automatic transmission for vehicle

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Embodiment Construction

[0044] The following description is merely exemplary in nature and is not intended to limit the invention, application or use. It should be understood that throughout the drawings, corresponding reference numerals indicate similar or corresponding parts and features.

[0045] In the following description, since the component names are identical to each other, the component names are distinguished into first, second, etc. to distinguish the names, and the order of the components is not specifically limited. Furthermore, as used herein, a description of elements "fixedly" connected or interconnected includes elements that are always connected directly or indirectly such that the fixedly connected elements always rotate at the same speed.

[0046] figure 1 is a schematic illustration of a planetary gear train in a first form of the invention.

[0047] see figure 1, the planetary gear train in the first form of the present invention includes: a first planetary gear set PG1, a s...

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Abstract

The present disclosure provides a planetary gear train of an automatic transmission for a vehicle. The planetary gear train includes: input and output shafts, first to fifth planetary gear sets respectively having first to third, fourth to sixth, seventh to ninth, tenth to twelfth, and thirteenth to fifteenth rotational elements, a first shaft connected with the second rotational element and the input shaft, a second shaft connected with the fourteenth rotational element and the output shaft, a third shaft connected with the sixth and thirteenth rotational elements, a fourth shaft connected with the tenth and fifteenth rotational elements, a fifth shaft connected with the third, fourth, and seventh rotational elements, a sixth shaft connected with the eighth rotational element, a seventh shaft connected with the fifth, ninth, and eleventh rotational elements, an eighth shaft connected with the first rotational element, and a ninth shaft connected with the twelfth rotational element.

Description

[0001] Cross References to Related Applications [0002] This application claims priority and benefit from Korean Patent Application No. 10-2017-0058307 filed May 10, 2017, the entire contents of which are hereby incorporated by reference. technical field [0003] The present invention relates to an automatic transmission for a vehicle. Background technique [0004] The statements in this section merely provide background information related to the present disclosure and may not constitute prior art. [0005] In the field of automatic transmissions, more gear shift diversity is a useful technique for improving fuel consumption and enhancing vehicle drivability. [0006] Under the trend of so-called engine miniaturization, achieving more gear shifts helps to improve the performance and efficiency of the vehicle, and by improving the consistency of the vehicle's acceleration before and after the shift, the shift gears are better. The grade ratio linearity improves the drivab...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16H3/66F16H57/10
CPCF16H3/66F16H57/10F16H2200/0069F16H2200/0091F16H2200/2015F16H2200/2046
Inventor 金珍镐黄铜焕朴钟述金钟洙李炅勋
Owner HYUNDAI MOTOR CO LTD