US 9,791,022 B2Granted

Planetary gear train of automatic transmission for vehicle

AssigneeHyundai Motor Company

InventorsKyeongHun Lee, Chang Wook Lee, JongSool Park, Sueng Ho Lee, Dong Hwan Hwang

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Abstract

A planetary gear train of an automatic transmission includes an input shaft; an output shaft; a first planetary gear set having first to third rotating elements; a second planetary gear set having fourth to sixth rotating elements; a third planetary gear set having seventh to ninth rotating elements; a fourth planetary gear set having tenth to twelfth rotating elements; and seven control elements, wherein the input shaft is continuously connected with the second rotating element, the output shaft is continuously connected with the eleventh rotating element, the second rotating element is continuously connected with the fourth rotating element, the third rotating element is continuously connected with the tenth rotating element, the sixth rotating element is continuously connected with the seventh rotating element, the ninth rotating element is continuously connected with the twelfth rotating element, the third rotating element and the eighth rotating element are selectively connected.

Claims11

Dependent claims

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

an input shaft which receives power from an engine;
an output shaft which outputs power changed in speed;
a first planetary gear set which has first, second, and third rotating elements;
a second planetary gear set which has fourth, fifth, and sixth rotating elements;
a third planetary gear set which has seventh, eighth, and ninth rotating elements;
a fourth planetary gear set which has tenth, eleventh, and twelfth rotating elements;
and
seven control elements which are disposed between the rotating elements, and disposed at portions where the rotating elements are selectively connected to a transmission housing,
wherein the input shaft is continuously connected with the second rotating element,
the output shaft is continuously connected with the eleventh rotating element,
the second rotating element is continuously connected with the fourth rotating element,
the third rotating element is continuously connected with the tenth rotating element,
the sixth rotating element is continuously connected with the seventh rotating element,
the ninth rotating element is continuously connected with the twelfth rotating element,
the third rotating element and the eighth rotating element are selectively connected, and
at least ten forward speeds and at least one reverse speed are implemented by operations of three control elements among the seven control elements, and
wherein the ninth rotating element is selectively connected with the transmission housing,
the first rotating element is selectively connected with the transmission housing,
the eighth rotating element is selectively connected with the transmission housing,
the first rotating element is selectively connected with the sixth rotating element,
the fifth rotating element is selectively connected with the sixth rotating element, and
the fifth rotating element is selectively connected with the eighth rotating element.

19 more elements

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

an input shaft which receives power from an engine;
an output shaft which outputs power changed in speed;
a first planetary gear set which has first, second, and third rotating elements;
a second planetary gear set which has fourth, fifth, and sixth rotating elements;
a third planetary gear set which has seventh, eighth, and ninth rotating elements;
a fourth planetary gear set which has tenth, eleventh, and twelfth rotating elements;
seven control elements which are disposed between the rotating elements, and disposed at portions where the rotating elements are selectively connected to a transmission housing;
a first rotating shaft which includes the first rotating element, and is selectively connected with the transmission housing;
a second rotating shaft which includes the second rotating element and the fourth rotating element, and is directly connected with the input shaft;
a third rotating shaft which includes the third rotating element and the tenth rotating element;
a fourth rotating shaft which includes the fifth rotating element;
a fifth rotating shaft which includes the sixth rotating element and the seventh rotating element, and is selectively connected with the first and fourth rotating shafts;
a sixth rotating shaft which includes the eighth rotating element, and is selectively connected with the third and fourth rotating shafts and simultaneously and selectively connected to the transmission housing;
a seventh rotating shaft which includes the ninth rotating element and the twelfth rotating element, and is selectively connected to the transmission housing;
and
an eighth rotating shaft which includes the eleventh rotating element, and is connected with the output shaft to be continuously operated as an output element.

13 more elements

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

an input shaft which receives power from an engine;
an output shaft which outputs power changed in speed;
a first planetary gear set which has first, second, and third rotating elements;
a second planetary gear set which has fourth, fifth, and sixth rotating elements;
a third planetary gear set which has seventh, eighth, and ninth rotating elements;
a fourth planetary gear set which has tenth, eleventh, and twelfth rotating elements;
a first rotating shaft which includes the first rotating element, and is selectively connected with a transmission housing;
a second rotating shaft which includes the second rotating element and the fourth rotating element, and is directly connected with the input shaft;
a third rotating shaft which includes the third rotating element and the tenth rotating element;
a fourth rotating shaft which includes the fifth rotating element;
a fifth rotating shaft which includes the sixth rotating element and the seventh rotating element, and is selectively connected with the first and fourth rotating shafts;
a sixth rotating shaft which includes the eighth rotating element, and is selectively connected with the third and fourth rotating shafts and simultaneously and selectively connected to the transmission housing;
a seventh rotating shaft which includes the ninth rotating element and the twelfth rotating element, and is selectively connected to the transmission housing;
an eighth rotating shaft which includes the eleventh rotating element, and is connected with the output shaft to be continuously operated as an output element;
a first clutch which selectively connects the third rotating shaft and the sixth rotating shaft;
a second clutch which selectively connects the first rotating shaft and the fifth rotating shaft;
a third clutch which selectively connects the fourth rotating shaft and the fifth rotating shaft;
a fourth clutch which selectively connects the fourth rotating shaft and the sixth rotating shaft;
a first brake which selectively connects the seventh rotating shaft and the transmission housing;
a second brake which selectively connects the first rotating shaft and the transmission housing;
and
a third brake which selectively connects the sixth rotating shaft and the transmission housing.

19 more elements

Dependencies are inferred from the claim text.

Facts

Application: 14/941,400Filed 13 Nov 2015
Priority: KR 10-2015-00633536 May 2015
Published: US 2016/0327132 A110 Nov 2016
Granted: 17 Oct 2017
Term ends: Not estimatedThe source records don’t support an estimate.

Classification6 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 2200/0069
Characterised by the number of forward speeds: the gear ratios comprising ten forward speeds
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