Planetary gear train of automatic transmission for vehicles

Patent metadata

Field	Value
Publication number	US-10047832-B2
Application number	US-201615375373-A
Country	US
Kind code	B2
Filing date	Dec 12, 2016
Priority date	Oct 4, 2016
Publication date	Aug 14, 2018
Grant date	Aug 14, 2018

Abstract

A planetary gear train of an automatic transmission for a vehicle includes: an input shaft and an output shaft; a first planetary gear set including a first, second, and third rotation elements; a second planetary gear set including a fourth, fifth, and sixth rotation elements; a third planetary gear set including a seventh, eighth, and ninth rotation elements; a fourth planetary gear set including a tenth, eleventh and twelfth rotation elements; a first shaft interconnecting the first rotational element and the twelfth rotational element; a second shaft connected with the second rotational element and the input shaft; a third shaft interconnecting the third rotational element and the fourth rotational element; a fourth shaft interconnecting the sixth rotational element and the seventh rotational element; a fifth shaft interconnecting the ninth rotational element and the tenth rotational element; and a sixth shaft connected with the eleventh rotational element and the output shaft.

First claim

What is claimed is:

1. A planetary gear train of an automatic transmission for a vehicle, the planetary gear train comprising:
an input shaft configured to receive an engine torque;
an output shaft outputting changed torque;
a first planetary gear set including a first, a second, and a third rotation element;
a second planetary gear set including a fourth, a fifth, and a sixth rotation element;
a third planetary gear set including a seventh, an eighth, and a ninth rotation element;
a fourth planetary gear set including a tenth, an eleventh and a twelfth rotation element;
a first shaft fixedly interconnecting the first rotational element and the twelfth rotational element;
a second shaft fixedly connected with the second rotational element and fixedly connected with the input shaft;
a third shaft fixedly interconnecting the third rotational element and the fourth rotational element;
a fourth shaft fixedly interconnecting the sixth rotational element and the seventh rotational element;
a fifth shaft fixedly interconnecting the ninth rotational element and the tenth rotational element;
a sixth shaft fixedly connected with the eleventh rotational element, and fixedly connected with the output shaft, wherein the sixth shaft is selectively connected with the fourth shaft and the fifth shaft respectively;
a seventh shaft connected with the fifth rotational element, and selectively connected with the first shaft and the second shaft;
an eighth shaft connected with the eighth rotational element, wherein the third shaft, the fifth shaft, and the eighth shaft are selectively connected with a transmission housing respectively;
a first clutch selectively connecting the fourth shaft and sixth shaft;
a second clutch selectively connecting the second shaft and the seventh shaft;
a third clutch selectively connecting the fifth shaft and the sixth shaft;
a fourth clutch selectively connecting the first shaft and the seventh shaft;
a first brake selectively connecting the third shaft and the transmission housing;
a second brake selectively connecting the fifth shaft and the transmission housing; and
a third brake selectively connecting the eighth shaft and the transmission housing.

2. The planetary gear train of claim 1 , wherein:
the first, second, and third rotational elements of the first planetary gear set are respectively a first sun gear, a first planet carrier, and a first ring gear of the first planetary gear set;
the fourth, fifth, and sixth rotational element of the second planetary gear set are respectively a second sun gear, a second planet carrier, and a second ring gear of the second planetary gear set;
the seventh, eighth, and ninth rotational elements of the third planetary gear set are respectively a third sun gear, a third planet carrier, and a third ring gear of the third planetary gear set; and
the tenth, eleventh, and twelfth rotational elements of the fourth planetary gear set are respectively a fourth sun gear, a fourth planet carrier, and a fourth ring gear of the fourth planetary gear set.

3. The planetary gear train of claim 1 , wherein the first, second, third, and fourth planetary gear sets are disposed in a sequence of the first, second, third, and fourth planetary gear sets from an engine side.

4. A planetary gear train of an automatic transmission for a vehicle, the planetary gear train comprising:
an input shaft configured to receive an engine torque;
an output shaft configured to output changed torque;
a first planetary gear set having first, second, and third rotational elements;
a second planetary gear set having fourth, fifth, and sixth rotational elements;
a third planetary gear set having seventh, eighth, and ninth rotational elements; and
a fourth planetary gear set having tenth, eleventh, and twelfth rotational elements;
wherein the input shaft is fixedly connected with the second rotational element;
wherein the output shaft is fixedly connected with the eleventh rotational element;
wherein the first rotational element is fixedly connected with twelfth rotational element and is selectively connected with the fifth rotational element;
wherein the second rotational element is selectively connected with the fifth rotational element;
wherein the third rotational element is fixedly connected with the fourth rotational element;
wherein the sixth rotational element is fixedly connected with the seventh rotational element and is selectively connected with the eleventh rotational element; and
wherein the ninth rotational element is fixedly connected with the tenth rotational element.

5. The planetary gear train of claim 4 , wherein:
the third rotational element, the eighth rotational element and the ninth rotational element are selectively connected with a transmission housing respectively, and
the tenth rotational element is selectively connected with the eleventh rotational element.

6. The planetary gear train of claim 5 , further comprising:
a first clutch selectively connecting the seventh rotational element and the eleventh rotational element;
a second clutch selectively connecting the second rotational element and the fifth rotational element;
a third clutch selectively connecting the tenth rotational element and the eleventh rotational element;
a fourth clutch selectively connecting the first rotational element and the fifth rotational element;
a first brake selectively connecting the third rotational element and the transmission housing;
a second brake selectively connecting the ninth rotational element and the transmission housing; and
a third brake selectively connecting the eighth rotational element and the transmission housing.

7. The planetary gear train of claim 4 , wherein:
the third rotational element, the eighth rotational element, and the ninth rotational element are selectively connected with a transmission housing respectively, and
the eleventh rotational element is selectively connected with the twelfth rotational element.

8. The planetary gear train of claim 7 , further comprising:
a first clutch selectively connecting the seventh rotational element and the eleventh rotational element;
a second clutch selectively connecting the second rotational element and the fifth rotational element;
a third clutch selectively connecting the eleventh rotational element and the twelfth rotational element;
a fourth clutch selectively connecting the first rotational element and the fifth rotational element;
a first brake selectively connecting the third rotational element and the transmission housing;
a second brake selectively connecting the ninth rotational element and the transmission housing; and
a third brake selectively connecting the eighth rotational element and the transmission housing.

9. The planetary gear train of claim 4 , wherein:
the first, second, and third rotational elements of the first planetary gear set are respectively a first sun gear, a first planet carrier, and a first ring gear of the first planetary gear set;
the fourth, fifth, and sixth rotational elements of the second planetary gear set are respectively a second sun gear, a second planet carrier, and a second ring gear of the second planetary gear set;
the seventh, eighth, and ninth rotational elements of the third planetary gear set are respectively a third sun gear, a third planet carrier, and a third ring gear of the third planetary gear set; and
the tenth, eleventh, and twelfth rotational elements of the fourth planetary gear set are respectively a fourth sun gear, a fourth planet carrier, and a fourth ring gear of the fourth planetary gear set.

10. The planetary gear train of claim 4 , wherein the first, second, third, and

Assignees

• Hyundai Motor Co Ltd

Inventors

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

Classifications

• F16H2200/0069

  the gear ratios comprising ten forward speeds · CPC title

• F16H2200/2012

  with four sets of orbital gears · CPC title

• F16H3/64 Primary

  composed of a number of gear trains, the drive always passing through all the trains, each train having not more than one connection for driving another train · CPC title

• F16H3/66 Primary

  composed of a number of gear trains without drive passing from one train to another · CPC title

• F16H2200/2048

  with seven engaging means · CPC title