Planetary gear train of automatic transmission for vehicle

Patent metadata

Field	Value
Publication number	US-9670994-B2
Application number	US-201514947948-A
Country	US
Kind code	B2
Filing date	Nov 20, 2015
Priority date	Sep 14, 2015
Publication date	Jun 6, 2017
Grant date	Jun 6, 2017

Abstract

A planetary gear train of an automatic transmission for a vehicle may include: 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 six control elements wherein one of the six control elements is disposed at a portion where one of the first to twelfth rotating elements is selectively connected to another of the first to twelfth rotating elements, or at a portion where the one of the first to twelfth rotating elements is selectively connected to the transmission housing.

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 which receives power from an engine;
an output shaft which outputs power changed in speed;
a first planetary gear set which has a first rotating element, a second rotating element, and a third rotating element;
a second planetary gear set which has a fourth rotating element, a fifth rotating element, and a sixth rotating element;
a third planetary gear set which has a seventh rotating element, an eighth rotating element, and a ninth rotating element;
a fourth planetary gear set which has tenth, eleventh, and twelfth rotating elements;
six control elements wherein one of the six control elements is disposed at a portion where one of the first to twelfth rotating elements is selectively connected to another of the first to twelfth rotating elements, or at a portion where the one of the first to twelfth rotating elements is selectively connected to a transmission housing;
a first rotating shaft including the first rotating element;
a second rotating shaft which includes the second rotating element, and is continuously directly connected to the input shaft;
a third rotating shaft which includes the third rotating element, the fifth rotating element, and the eighth rotating element;
a fourth rotating shaft which includes the fourth rotating element, and selectively connected to the first rotating shaft or the transmission housing;
a fifth rotating shaft which includes the sixth rotating element and the tenth rotating element, and is selectively connected to the transmission housing;
a sixth rotating shaft which includes the seventh rotating element, and is selectively connected to the second rotating shaft or the fourth rotating shaft;
a seventh rotating shaft which includes the ninth rotating element and the eleventh rotating element, and is directly connected to the output shaft; and
an eighth rotating shaft which includes the twelfth rotating element, and is selectively connected to the second rotating shaft or the input shaft,
wherein the six control elements include:
a first clutch which selectively connects the second rotating shaft and the sixth rotating shaft;
a second clutch which selectively connects the second rotating shaft and the eighth rotating shaft;
a third clutch which selectively connects the first rotating shaft and the fourth rotating shaft;
a fourth clutch which selectively connects the fourth rotating shaft and the sixth rotating shaft;
a first brake which selectively connects the fifth rotating shaft and the transmission housing; and
a second brake which selectively connects the fourth rotating shaft and the transmission housing.

2. The planetary gear train of claim 1 , wherein
the first planetary gear set is a single pinion planetary gear set in which the first rotating element is a first sun gear, the second rotating element is a first planet carrier, and the third rotating element is a first ring gear;
the second planetary gear set is a single pinion planetary gear set in which the fourth rotating element is a second sun gear, the fifth rotating element is a second planet carrier, and the sixth rotating element is a second ring gear;
the third planetary gear set is a single pinion planetary gear set in which the seventh rotating element is a third sun gear, the eighth rotating element is a third planet carrier, and the ninth rotating element is a third ring gear; and
the fourth planetary gear set is a single pinion planetary gear set in which the tenth rotating element is a fourth sun gear, the eleventh rotating element is a fourth planet carrier, and the twelfth rotating element is a fourth ring gear.

3. The planetary gear train of claim 1 , wherein
gear shift stages, which are implemented by selectively operating the six control elements, include:
a first forward gear shift stage which is implemented by simultaneously operating the first and fourth clutches and the first brake;
a second forward gear shift stage which is implemented by simultaneously operating the third and fourth clutches and the first brake;
a third forward gear shift stage which is implemented by simultaneously operating the first and third clutches and the first brake;
a fourth forward gear shift stage which is implemented by simultaneously operating the first clutch and the second clutch and the first brake;
a fifth forward gear shift stage which is implemented by simultaneously operating the first, second, and third clutches;
a sixth forward gear shift stage which is implemented by simultaneously operating the first clutch and the second clutch and the second brake;
a seventh forward gear shift stage which is implemented by simultaneously operating the second and third clutches and the second brake;
an eighth forward gear shift stage which is implemented by simultaneously operating the first and third clutch and the second brake;
a ninth forward gear shift stage which is implemented by simultaneously operating the third and fourth clutches and the second brake; and
a reverse gear shift stage which is implemented by simultaneously operating the first clutch and the first and second brakes.

4. 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 is configured as a single pinion planetary gear set, and has a first rotating element, a second rotating element, and a third rotating element;
a second planetary gear set which is configured as a single pinion planetary gear set, and has a fourth rotating element, a fifth rotating element, and a sixth rotating element;
a third planetary gear set which is configured as a single pinion planetary gear set, and a seventh rotating element, an eighth rotating element, and a ninth rotating element;
a fourth planetary gear set which is configured as a single pinion planetary gear set, and has tenth, eleventh, and twelfth rotating elements;
a first rotating shaft which includes the first rotating element;
a second rotating shaft which includes the second rotating element and is directly connected to the input shaft;
a third rotating shaft which includes the third rotating element, the fifth rotating element, and the eighth rotating element;
a fourth rotating shaft which includes the fourth rotating element and is selectively connected to the first rotating shaft or a transmission housing;
a fifth rotating shaft which includes the sixth rotating element and the tenth rotating element, and is selectively connected to the transmission housing;
a sixth rotating shaft which includes the seventh rotating element and is selectively connected to the second rotating shaft or the fourth rotating shaft;
a seventh rotating shaft which includes the ninth rotating element and the eleventh rotating element, and is directly connected to the output shaft;
an eighth rotating shaft which includes the twelfth rotating element, and is selectively connected to the second rotating shaft or the input shaft;
a first clutch which selectively connects the second rotating shaft and the sixth rotating shaft;
a second clutch which selectively connects the second rotating shaft and the eighth rotating shaft;
a third clutch which selectively connects the first rotating shaft and the fourth rotating shaft;
a fourth clutch which selectively connects the fourth rotating shaft and the sixth rotating shaft;
a first brake which selectively connects the fifth rotating shaft and the transmission housing; and
a second brake which selectively connects the fourth rotating shaft and the transmission housing.

5. The planetary gea

Assignees

• Hyundai Motor Co Ltd

Inventors

• Park Jongsool
• Lee Sueng Ho
• Hwang Dong Hwan
• Hwang Seong Wook
• Ji Seongwook
• Cho Wonmin
• KWON Hyun Sik
• Lee Kyeonghun
• Kim Jong Soo

Classifications

• F16H2200/2012

  with four sets of orbital gears · CPC title

• F16H2200/2046

  with six engaging means · CPC title

• F16H2200/0065

  the gear ratios comprising nine forward speeds · CPC title

• F16H2200/0082

  characterised by the number of reverse speeds · CPC title

• F16H3/66 Primary

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