US 9,791,023 B2Granted

Planetary gear train of automatic transmission for vehicle

AssigneeHyundai Motor Company

InventorsSeong Wook Hwang, Jae Chang Kook, Dong Hwan Hwang, Chang Wook Lee, Seongwook Ji, Wonmin Cho, Hyun Sik Kwon, Jong Sool Park, Kyeong Hun Lee, Jong Soo Kim

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Abstract

A planetary gear train of an automatic transmission for a vehicle may include an input shaft configured for receiving an engine torque, an output shaft configured for outputting a shifted 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 element, and six control elements for selectively interconnecting the rotation elements and a transmission housing.

Claims13

Dependent claims

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

an input shaft configured for receiving an engine torque;
an output shaft configured for outputting a shifted 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;
and
six control elements for selectively interconnecting the rotation elements and a transmission housing,
wherein the input shaft is continuously connected to the third rotation element and selectively connected to eighth rotation element,
the output shaft is continuously connected to the second rotation element and the eleventh rotation element,
the fourth rotation element is continuously connected to the transmission housing,
the fifth rotation element is continuously connected to the ninth rotation element,
the sixth rotation element is continuously connected to the tenth rotation element, and
at least nine forward speeds and at least one reverse speed are achieved by controlling three of the six control elements.

11 more elements

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

an input shaft configured for receiving an engine torque;
an output shaft configured for outputting a shifted 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;
six control elements for selectively interconnecting the rotation elements and a transmission housing;
a first connecting member connected to the first rotation element;
a second connecting member connected to the second rotation element and the eleventh rotation element and directly connected to the output shaft;
a third connecting member connected to the third rotation element and directly connected to the input shaft;
a fourth connecting member connected to the fourth rotation element and directly connected to the transmission housing;
a fifth connecting member connected to the fifth rotation element and the ninth rotation element;
a sixth connecting member connected to the sixth rotation element and the tenth rotation element;
a seventh connecting member connected to the seventh rotation element and selectively connected to the third connecting member;
an eighth connecting member connected to the eighth rotation element, selectively connected to the input shaft and the sixth connecting member, and selectively connected to the transmission housing;
and
a ninth connecting member connected to the twelfth rotation element, selectively connected to the first connecting member, and selectively connected to transmission housing.

14 more elements

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

an input shaft configured for receiving an engine torque;
an output shaft configured for outputting a shifted torque;
a first planetary gear set as a single pinion planetary gear set including first, second, and third rotation elements;
a second planetary gear set as a single pinion planetary gear set including fourth, fifth, and sixth rotation elements;
a third planetary gear set as a single pinion planetary gear set including seventh, eighth, and ninth rotation elements;
a fourth planetary gear set as a single pinion planetary gear set including tenth, eleventh, and twelfth rotation elements;
a first connecting member connected to the first rotation element;
a second connecting member connected to the second rotation element and the eleventh rotation element and directly connected to the output shaft;
a third connecting member connected to the third rotation element and directly connected to the input shaft;
a fourth connecting member connected to the fourth rotation element and directly connected to the transmission housing;
a fifth connecting member connected to the fifth rotation element and the ninth rotation element;
a sixth connecting member connected to the sixth rotation element and the tenth rotation element;
a seventh connecting member connected to the seventh rotation element and selectively connected to the third connecting member;
an eighth connecting member connected to the eighth rotation element, selectively connected to the input shaft and the sixth connecting member, and selectively connected to the transmission housing;
a ninth connecting member connected to the twelfth rotation element, selectively connected to the first connecting member, and selectively connected to transmission housing;
a first clutch selectively connecting the third connecting member and the seventh connecting member;
a second clutch selectively connecting the input shaft and the eighth connecting member;
a third clutch selectively connecting the sixth connecting member and the eighth connecting member;
a fourth clutch selectively connecting the first connecting member and the ninth connecting member;
a first brake selectively connecting the eighth connecting member and the transmission housing;
and
a second brake selectively connecting the ninth connecting member and the transmission housing.

19 more elements

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

an input shaft configured for receiving an engine torque;
an output shaft configured for outputting a shifted torque;
a first planetary gear set as a single pinion planetary gear set including a first sun gear, a first planet carrier, and a first ring gear;
a second planetary gear set as a single pinion planetary gear set including a second sun gear, a second planet carrier, and a second ring gear;
a third planetary gear set as a single pinion planetary gear set including a third sun gear, a third planet carrier, and a third ring gear;
a fourth planetary gear set as a single pinion planetary gear set including a fourth sun gear, a fourth planet carrier, and a fourth ring gear;
a first connecting member connected to the first sun gear;
a second connecting member connected to the first planet carrier and the fourth planet carrier and directly connected to the output shaft;
a third connecting member connected to the first ring gear and directly connected to the input shaft;
a fourth connecting member connected to the second sun gear and directly connected to the transmission housing;
a fifth connecting member connected to the second planet carrier and the third ring gear;
a sixth connecting member connected to the second ring gear and the fourth sun gear;
a seventh connecting member connected to the third sun gear and selectively connected to the third connecting member;
an eighth connecting member connected to the third planet carrier, selectively connected to the input shaft and the sixth connecting member, and selectively connected to transmission housing;
a ninth connecting member connected to the fourth ring gear, selectively connected to the first connecting member, and selectively connected to the transmission housing;
and
six control elements selectively connecting the connecting members and the transmission housing.

14 more elements

Dependencies are inferred from the claim text.

Facts

Application: 15/191,909Filed 24 Jun 2016
Priority: KR 10-2015-014762022 Oct 2015
Published: US 2017/0114869 A127 Apr 2017
Granted: 17 Oct 2017
Term ends: Not estimatedThe source records don’t support an estimate.

Classification7 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 3/666
Composed of a number of gear trains without drive passing from one train to another: with intermeshing orbital gears
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