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Planetary gear train of automatic transmission for vehicles

A technology of automatic transmission and planetary gear train, which is applied in the field of vehicle transmission, can solve the problems of improving fuel efficiency, lack of engine drive efficiency, and decreased vehicle drivability, so as to achieve the effect of improving drivability and ensuring linearization

Active Publication Date: 2017-03-22
HYUNDAI MOTOR CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] However, for the existing eight-speed automatic transmission, the span of the gear ratio is maintained at a level of 6.5 to 7.5, so there is a problem that the existing eight-speed automatic transmission does not have a significant effect of improving fuel efficiency
[0010] In the case where the span of the gear ratio of the eight-speed automatic transmission is increased to a level of 9.0 or higher, since the linearization of the step ratio between gears cannot be ensured, the driving efficiency of the engine and the drivability of the vehicle will decrease

Method used

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

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Embodiment Construction

[0026] 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 has been 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 others, which may be included within the spirit and scope of the invention as defined by the appended claims. implementation plan.

[0027] The present invention will be described more fully hereinafter with reference to the accompanying drawings, in which exemplary embodiments of the invention are shown. As those skilled in the art would realize, the described embodiments may be modified in various different ways, all without departing from the spirit or scope of th...

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Abstract

A planetary gear train of an automatic transmission may include an input shaft; an output shaft; first to fourth planetary gear sets and six control elements disposed at a portion selectively connecting the rotation elements and the rotation elements or a portion selectively connecting the rotation elements and the transmission housing, wherein the input shaft is continuously connected to the third rotation element, the output shaft is continuously connected to the twelfth rotation element, the first rotation element is continuously connected to the transmission housing, the fourth rotation element is continuously connected to the seventh rotation element, the fourth rotation element is continuously connected to the tenth rotation element, the eighth rotation element is continuously connected to the twelfth rotation element, the fifth rotation element is selectively connected to the transmission housing.

Description

[0001] Cross References to Related Applications [0002] This application claims priority and benefit from Korean Patent Application No. 10-2015-0129867 filed on September 14, 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 transmission for a vehicle that achieves nine forward speed gears using a minimum number of constituent elements while enlarging the span of a transmission ratio, thereby improving power transmission performance and fuel consumption And the linearization of the step ratio between the transmission gears is obtained. Background technique [0004] More recently, rising oil prices have automakers struggling to meet worldwide demands for improved fuel efficiency. [0005] Therefore, for the engine, research is being conducted to reduce weight and improve fuel efficie...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16H3/66
CPCF16H3/66F16H2200/0065F16H2200/2012F16H2200/2097F16H2200/2046
Inventor 朴钟述黄铜焕黄圣旭池晟旭李昌郁权贤植金石镇李炅勋赵源珉
Owner HYUNDAI MOTOR CO LTD
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