US 9,869,374 B2Granted

Planetary gear train of automatic transmission for vehicle

AssigneeHyundai Motor Company

InventorsJong Soo Kim, Jinseok Kim, Jae Chang Kook, Dong Hwan Hwang, Seong Wook Hwang, Woo Jin Chang, Seongwook Ji, Chon Ok Kim, Wonmin Cho, Hyun Sik Kwon, Jong Sool Park, Kyeong Hun Lee, Tae Whan Kim

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Abstract

The present disclosure provides a planetary gear train of an automatic transmission for a vehicle. The planetary gear train may include: an input shaft receiving torque of an engine; an output shaft outputting changed torque; 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.

Claims9

Dependent claims

A planetary gear train of an automatic transmission for a vehicle comprising:

an input shaft receiving torque of an engine;
an output shaft outputting torque;
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;
a first shaft directly connecting the first rotation element, the fifth rotation element, the ninth rotation element and the tenth rotation element with each other;
a second shaft directly connected to the second rotation element and directly connected to the input shaft;
a third shaft directly connecting the third rotation element with the fourth rotation element;
a fourth shaft directly connected to the sixth rotation element;
a fifth shaft directly connected to the seventh rotation element and selectively connected to the input shaft;
a sixth shaft directly connected to the eighth rotation element, and selectively connected to the second shaft;
a seventh shaft directly connected to the eleventh rotation element;
and
an eighth shaft directly connected to the twelfth rotation element.

12 more elements

A planetary gear train of an automatic transmission for a vehicle comprising:

an input shaft receiving torque of an engine;
an output shaft outputting torque;
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;
and
a fourth planetary gear set including tenth, eleventh, and twelfth rotation elements,
wherein the input shaft is directly connected to the second rotation element,
the output shaft is directly connected to the eleventh rotation element,
the first rotation element is directly connected to the fifth rotation element, the ninth rotation element and the tenth rotation element,
the third rotation element is directly connected to the fourth rotation element and the third rotation element is selectively connected to the output shaft,
the sixth rotation element is selectively connected to the eighth rotation element,
the seventh rotation element is selectively connected to a transmission housing and the seventh rotation element is selectively connected to the input shaft in a state of being disconnected from the transmission housing,
the eighth rotation element is selectively connected to the transmission housing and the eighth rotation element is selectively connected to the second rotation element in a state of being disconnected from the transmission housing, and
the twelfth rotation element is selectively connected to the transmission housing.

12 more elements

Dependencies are inferred from the claim text.

Facts

Application: 15/078,584Filed 23 Mar 2016
Priority: KR 10-2016-00284819 Mar 2016
Published: US 2017/0261072 A114 Sep 2017
Granted: 16 Jan 2018
Term ends: Not estimatedThe source records don’t support an estimate.

Classification5 codes

F16H 3/66
Gearings having three or more central gears: composed of a number of gear trains without drive passing from one train to another
F16H 2200/0073
Characterised by the number of forward speeds: the gear ratios comprising eleven forward speeds
F16H 2200/2012
Characterised by the number of sets of orbital gears: with four sets of orbital gears
F16H 2200/2048
Characterised by the engaging friction means not of the freewheel type, e.g. friction clutches or brakes: with seven engaging means