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Planetary gear train for an automatic transmission of a vehicle

A technology of automatic transmission and planetary gear train, applied in the direction of vehicle gearbox, vehicle parts, gear transmission, etc., can solve the problem of poor driving efficiency of vehicle driving performance, unable to improve power performance and fuel economy well, difficult to guarantee problems such as level ratio linearity, etc., to achieve the effect of improving driving

Active Publication Date: 2021-02-09
HYUNDAI MOTOR CO LTD
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  • Abstract
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  • Claims
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AI Technical Summary

Problems solved by technology

[0009] However, since the traditional 8-speed automatic transmission has a transmission ratio span of 6.5-7.5 (the transmission ratio span is an important factor to ensure the linearity of the step ratio), it may not be able to improve the power performance and fuel economy very well
[0010] In addition, if the 8-speed automatic transmission has a transmission ratio span greater than 9.0, it is difficult to ensure the linearity of the various ratios
Therefore, the driving efficiency of the engine and the drivability of the vehicle may be deteriorated, so it is necessary to develop a high-efficiency automatic transmission that realizes at least nine forward speed gears

Method used

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

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Embodiment Construction

[0029] Reference will now be made in detail to various embodiments of the invention, examples of which are illustrated in the accompanying drawings and described below. While the invention will be described in conjunction with exemplary embodiments, it will be understood that present description is not intended to limit the invention to those exemplary embodiments. On the contrary, the invention is intended to cover not only the exemplary embodiments but also various alternatives, modifications, equivalents and other alternatives, modifications, equivalents and others, which may be included within the spirit and scope of the invention as defined by the appended claims. implementation plan.

[0030] figure 1 is a schematic illustration of a planetary gear train according to various embodiments of the present invention.

[0031] see figure 1 , the planetary gear train according to various embodiments of the present invention includes: the first planetary gear set PG1, the s...

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Abstract

The present application discloses a planetary gear train for an automatic transmission of a vehicle, which may include: an input shaft, which receives the torque of the engine; an output shaft, which outputs the changed torque of the engine; a first planetary gear set, which includes A first rotation element, a second rotation element, and a third rotation element; a second planetary gear set including a fourth rotation element, a fifth rotation element, and a sixth rotation element; a third planetary gear set including a seventh rotation element , the eighth rotation element and the ninth rotation element; the fourth planetary gear set including the tenth rotation element, the eleventh rotation element and the twelfth rotation element, wherein the input shaft is directly connected to the second rotation element and the second rotation element Six rotation elements, the output shaft is directly connected to the third rotation element and the eleventh rotation element, the fourth rotation element is directly connected to the eighth rotation element and selectively connected to the first rotation element, and the seventh rotation element is directly connected to Ground is connected to the tenth rotating element.

Description

[0001] Cross References to Related Applications [0002] This application claims priority from Korean Patent Application No. 10-2015-0176067 filed on December 10, 2015, the entire contents of which are hereby incorporated by reference for all purposes. technical field [0003] The present invention relates to an automatic transmission for a vehicle. More particularly, the present invention relates to a planetary gear train of an automatic transmission for a vehicle that realizes at least nine forward speed gears and expands a speed ratio (or gear ratio) by using a minimum number of constituent elements, thereby Power transmission performance and fuel economy are improved, and transmission ratio linearity is ensured. Background technique [0004] In recent years, the increase in oil price has caused vehicle manufacturers to engage in fierce competition to improve the fuel consumption of vehicles. [0005] This requires an automatic transmission that realizes more speed gear...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16H3/66
CPCF16H3/66F16H2200/0065F16H2200/2012F16H2200/2046
Inventor 黄圣旭鞠再昌黄铜焕李昌郁池晟旭赵源珉权贤植朴钟述李炅勋金钟洙
Owner HYUNDAI MOTOR CO LTD
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