Planetary gear train of automatic transmission for a vehicle
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United States of America Patent
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Nov 21, 2017
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N/A
app pub date -
Oct 28, 2015
filing date -
May 6, 2015
priority date (Note) -
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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 changed torque of the engine, a first planetary gear set including first, second, and third rotation elements, a second planetary gear set including fourth, fifth, and sixth rotation elements, a third planetary gear set including seventh, eighth, and ninth rotation elements, a fourth planetary gear set including tenth, eleventh, and twelfth rotation elements, and seven friction elements disposed to selectively connect the rotation elements and to selectively connect the rotation elements with a transmission housing.
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