Planetary gear train of automatic transmission for vehicle

US20170268625A1Active Publication Date: 2017-09-21HYUNDAI MOTOR CO LTD
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Patent Information

Authority / Receiving Office
US · United States
Current Assignee / Owner
HYUNDAI MOTOR CO LTD
Publication Date
2017-09-21

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Abstract

A planetary gear train of an automatic transmission for a vehicle may include an input shaft receiving torque of an engine, an output shaft outputting torque of the engine, a first planetary gear set, a second planetary gear set, a third planetary gear set, a fourth planetary gear set, a first shaft, a second shaft, a third shaft, a fourth shaft directly connected to the input shaft, a fifth shaft selectively connectable to the second shaft, a sixth shaft selectively connectable to the fifth shaft, a seventh shaft selectively connectable to the fourth shaft and the fifth shaft, and an eighth shaft directly connected to the output shaft.
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Description

CROSS-REFERENCE TO RELATED APPLICATION

[0001] The present application claims priority to Korean Patent Application No. 10-2016-0032992, filed Mar. 18, 2016, the entire contents of which is incorporated herein for all purposes by this reference.BACKGROUND OF THE INVENTION

[0002] 1. Field of the Invention

[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 improves power delivery performance and fuel economy by achieving ten forward speed stages with a minimum number of constituent elements being used and improves silent driving of the vehicle by using an operation point positioned at a low engine speed.

[0004] 2. Description of Related Art

[0005] Generally, an automatic transmission achieving more speed stages has been developed to enhance fuel economy and optimize drivability. Recent increases in oil prices are triggering stiff competition in ...

Claims

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