US 10,094,448 B2Granted

Planetary gear train of automatic transmission for vehicle

AssigneeHyundai Motor Company

InventorsDong Hwan Hwang, Seong Wook Hwang, Seongwook Ji, Chang Wook Lee, Hyun Sik Kwon, Jong Sool Park, SeokJin Kim, Kyeong Hun Lee, Wonmin Cho

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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 a first rotation element, a second rotation element, and a third rotation element, a second planetary gear set including a fourth rotation element, a fifth rotation element, and a sixth rotation element, a third planetary gear set including a seventh rotation element, an eighth rotation element, and a ninth rotation element, and a fourth planetary gear set including a tenth rotation element, an eleventh rotation element, and a twelfth rotation element.

Claims10

Dependent claims

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

an input shaft receiving torque of an engine,
an output shaft outputting changed torque of the engine,
a first planetary gear set including a first rotation element, a second rotation element, and a third rotation element,
a second planetary gear set including a fourth rotation element, a fifth rotation element, and a sixth rotation element,
a third planetary gear set including a seventh rotation element, an eighth rotation element, and a ninth rotation element, and
a fourth planetary gear set including a tenth rotation element, an eleventh rotation element, and a twelfth rotation element,
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 directly connects the sixth rotation element with the tenth rotation element,
the second rotation element is directly connected to the fourth rotation element,
the fifth rotation element is directly connected to the ninth rotation element, and
the seventh rotation element is selectively connectable to a transmission housing.

8 more elements

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

an input shaft receiving torque of an engine,
an output shaft outputting changed torque of the engine,
a first planetary gear set including a first rotation element, a second rotation element, and a third rotation element,
a second planetary gear set including a fourth rotation element, a fifth rotation element, and a sixth rotation element,
a third planetary gear set including a seventh rotation element, an eighth rotation element, and a ninth rotation element,
a fourth planetary gear set including a tenth rotation element, an eleventh rotation element, and a twelfth rotation element,
a first rotation shaft directly connecting the first rotation element with the sixth rotation element and the tenth rotation element,
a second rotation shaft directly connecting the second rotation element with the fourth rotation element and directly connected to the input shaft,
a third rotation shaft directly connected to the third rotation element,
a fourth rotation shaft directly connecting the fifth rotation element with the ninth rotation element,
a fifth rotation shaft directly connected to the seventh rotation element and selectively connectable to a transmission housing,
a sixth rotation shaft directly connected to the eighth rotation element, selectively connectable to at least one of the first rotation shaft and the second rotation shaft, and selectively connectable to the transmission housing,
a seventh rotation shaft directly connected to the eleventh rotation element, selectively connectable to the third rotation shaft, and directly connected to the output shaft, and
an eighth rotation shaft directly connected to the twelfth rotation element and selectively connectable to the transmission housing.

11 more elements

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

an input shaft receiving torque of an engine,
an output shaft outputting changed torque,
a first planetary gear set including a single pinion planetary gear set and including a first rotation element, a second rotation element, and a third rotation element,
a second planetary gear set including a double pinion planetary gear set and including a fourth rotation element, a fifth rotation element, and a sixth rotation element,
a third planetary gear set including a single pinion planetary gear set and including a seventh rotation element, an eighth rotation element, and a ninth rotation element,
a fourth planetary gear set including a single pinion planetary gear set and including a tenth rotation element, an eleventh rotation element, and a twelfth rotation element,
a first rotation shaft directly connecting the first rotation element with the sixth rotation element and the tenth rotation element,
a second rotation shaft directly connecting the second rotation element with the fourth rotation element and directly connected to the input shaft,
a third rotation shaft directly connected to the third rotation element,
a fourth rotation shaft directly connecting the fifth rotation element with the ninth rotation element,
a fifth rotation shaft directly connected to the seventh rotation element and selectively connectable to a transmission housing,
a sixth rotation shaft directly connected to the eighth rotation element, selectively connectable to at least one of the first rotation shaft and the second rotation shaft, and selectively connectable to the transmission housing,
a seventh rotation shaft directly connected to the eleventh rotation element, selectively connectable to the third rotation shaft, and directly connected to the output shaft,
an eighth rotation shaft directly connected to the twelfth rotation element and selectively connectable to the transmission housing,
a first clutch selectively connecting the third rotation shaft with the seventh rotation shaft,
a second clutch selectively connecting the second rotation shaft with the sixth rotation shaft,
a third clutch selectively connecting the first rotation shaft with the sixth rotation shaft,
a first brake selectively connecting the sixth rotation shaft with the transmission housing,
a second brake selectively connecting the fifth rotation shaft with the transmission housing, and
a third brake selectively connecting the eighth rotation shaft with the transmission housing.

17 more elements

Dependencies are inferred from the claim text.

Facts

Application: 15/333,801Filed 25 Oct 2016
Priority: KR 10-2015-017632210 Dec 2015
Published: US 2017/0167579 A115 Jun 2017
Granted: 9 Oct 2018
Term ends: Not estimatedThe source records don’t support an estimate.

Classification6 codes

F16H 3/666
Composed of a number of gear trains without drive passing from one train to another: with intermeshing orbital gears
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 2200/0065
Characterised by the number of forward speeds: the gear ratios comprising nine forward speeds
F16H 2200/2012
Characterised by the number of sets of orbital gears: with four sets of orbital gears