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Planetary gear train of automatic transmission for vehicles

A technology for planetary gear trains and automatic transmissions, applied in vehicle gearboxes, vehicle components, gear transmissions, etc., can solve the problems of low and unfavorable enhancements in power performance and fuel consumption, and achieve improved power transmission efficiency and reduced resistance loss, the effect of excellent linearity

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

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Problems solved by technology

[0010] However, it has been found that in the 8-speed automatic transmission, since the shift span of the gear ratio (a factor for ensuring the linearity of the step ratio) is maintained at a level of 6.5 to 7.5, it is difficult to reduce the size of the engine. Enhancements in power performance and fuel consumption in situations where the efficiency level is lower than desired
[0011] In addition, the 8-speed automatic transmission is disadvantageous in ensuring the linearity of the ratio between the gear stages (i.e., the step ratio) when the shift span is raised above the level of 9.0

Method used

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

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Embodiment Construction

[0033] Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

[0034] The drawings and descriptions are to be regarded as illustrative in nature and not restrictive. Throughout the disclosure, the same reference numerals refer to the same elements.

[0035] In the following description, words such as first and second used in names of constituent elements are used to distinguish constituent elements having the same name and do not limit their order.

[0036] Furthermore, as used herein, description of "fixedly" connected or interconnected elements includes directly connected elements, ie, one element that is directly connected to another element for common rotation therewith.

[0037] figure 1 is a schematic diagram showing the planetary gear train in the first exemplary embodiment of the present invention.

[0038] refer to figure 1 , the planetary gear train includes: the first, second, third, ...

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Abstract

The invention provides a planetary gear train of an automatic transmission for vehicles. The planetary gear train of the automatic transmission for vehicles provides forward ten speed stages and one reverse speed stage. The planetary gear train includes: an input shaft; an output shaft; five planetary gear sets each having three rotation elements; three clutches; three brakes; and nine shafts. Some of the nine shafts may directly connect or selectively connect a plurality of rotation elements among the rotation elements via the clutches, and some of the nine shafts selectively connect selectedrotation elements to a transmission housing H via the brakes. In particular, the selected rotation elements are not connected to another rotation element of the five planetary gear sets.

Description

[0001] Cross References to Related Applications [0002] This application claims priority and benefit from Korean Patent Application No. 10-2017-0058304 filed on May 10, 2017, the entire contents of which are incorporated herein by reference. technical field [0003] The present invention relates to a planetary gear train of an automatic transmission for a vehicle, which can improve power transmission performance, fuel consumption, and linearity of shift stages. 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 general, in the field of automatic transmissions, research on multi-stage shifting has been conducted to reduce fuel consumption and improve drivability of vehicles. [0006] The multi-speed shifting stages of such automatic transmissions are expected to enhance power performance and drive efficiency while downsizing the engine. [0007] H...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16H3/66F16H57/023
CPCF16H3/66F16H57/023F16H2200/0091F16H2200/2015F16H2200/0069F16H2200/2046
Inventor 金珍镐黄铜焕朴钟述金钟洙李炅勋
Owner HYUNDAI MOTOR CO LTD
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