Planetary gear train of automatic transmission for vehicles

A planetary gear train, automatic transmission technology, applied in the direction of vehicle gearbox, vehicle components, gear transmission, etc., can solve the problems of not being widely used, deteriorating shift feeling, etc., to improve power transmission performance and fuel consumption, drive The effect of high efficiency and improved driving stability

Active Publication Date: 2017-09-26
HYUNDAI MOTOR CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this arrangement is not widely applicable, and using a dog clutch degrades shift feel

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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[0025] It should be understood that the term "vehicle" or "vehicular" or other similar terms as used herein generally includes motor vehicles such as passenger cars including sport utility vehicles (SUVs), buses, trucks, various commercial vehicles, Watercraft, aircraft, etc., including boats and ships of all kinds, and includes hybrid vehicles, electric vehicles, combustion plug-in hybrid electric vehicles, hydrogen-powered vehicles, and other alternative fuel vehicles (e.g., those obtained from sources other than petroleum fuel from outside sources).

[0026] The terminology used herein is for the purpose of describing particular embodiments only, and is not intended to limit the present invention. As used herein, the singular forms "a" and "the" are intended to include plural forms unless the context clearly dictates otherwise. It should be further understood that when used in this specification, the terms "comprising" and / or "comprising" specify the presence of stated fea...

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Abstract

The invention provides a planetary gear train of claim of an automatic transmission for a vehicle, which comprises an input shaft configured to receive an engine torque; an output shaft configured to output a shifted torque; a first planetary gear set having first, second, and third rotational elements; a second planetary gear set having fourth, fifth, and sixth rotational elements; a third planetary gear set having seventh, eighth, and ninth rotational elements; a fourth planetary gear set having tenth, eleventh, and twelfth rotational elements; a first shaft connected with the first rotational element; a second shaft interconnecting the second rotational element, the fourth rotational element, and seventh rotational element, and directly connected with the input shaft; a third shaft interconnecting the third rotational element and the eleventh rotational element; a fourth shaft interconnecting the fifth rotational element and the ninth rotational element, and selectively connected with the third shaft; a fifth shaft connected with the sixth rotational element; a sixth shaft connected with the eighth rotational element; a seventh shaft connected with the tenth rotational element, and selectively connected with the fourth shaft and the fifth shaft respectively; and an eighth shaft connected with the twelfth rotational element, selectively connected with the sixth shaft, and directly connected with the output shaft.

Description

technical field [0001] The present invention relates to an automatic transmission for a vehicle, and more particularly to a planetary gear train of an automatic transmission for a vehicle capable of obtaining nine forward speed gears by using a minimum of components, thereby improving power transmission performance and reducing fuel consumption consume. Background technique [0002] Research is being conducted on realizing more gears of the automatic transmission for improvement in fuel consumption rate and improvement in drivability, and in recent years, an increase in oil price is causing competition in improving fuel consumption of vehicles. Specifically, research has been conducted on engines to achieve weight reduction through downsizing and to improve fuel consumption, and research on automatic transmissions to simultaneously provide improved drivability and fuel consumption rate. [0003] To obtain more gears for an automatic transmission, the number of components i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16H3/64
CPCF16H3/64F16H2200/0065F16H2200/2012F16H2200/2046F16H3/66
Inventor 权贤植黄圣旭赵源珉鞠再昌池晟旭
Owner HYUNDAI MOTOR CO LTD
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