US 9,435,414 B2Granted

Planetary gear train of automatic transmission for vehicles

AssigneeHyundai Motor Company

InventorsChangwook Lee, Jaechang Kook, Jongsool Park, Kangsoo Seo, Donghwan Hwang

Life of this patent

Estimating the term…

Loading patent…

Abstract

A planetary gear train of an automatic transmission for a vehicle may include an input shaft, an output shaft, three planetary gear sets, three transfer gears, and six friction elements. Each of the three planetary gear sets may include three rotation elements, constituting nine rotational elements. The rotational elements may be connected or selectively connected to the input shaft, a transmission housing or each other by an external gear or by the six friction elements. The three transfer gears may be applied to the external gear.

Claims11

Dependent claims

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

an input shaft receiving power of an engine;
an output shaft disposed substantially in parallel with the input shaft;
a first planetary gear set having three rotation elements including a first sun gear, a first planetary carrier, and a first ring gear, and disposed on the input shaft;
a second planetary gear set having three rotation elements including a second sun gear, a second planetary carrier, and a second ring gear, and disposed on the output shaft;
a third planetary gear set having three rotation elements including a third sun gear, a third planetary carrier, and a third ring gear, and disposed on the input shaft;
first, second, and third transfer gears;
and
six friction elements, wherein:
a first rotation element, selectively connected to the input shaft, is a first rotation element of the first planetary gear set;
a second rotation element, selectively connected to the input shaft, is a second rotation element of the first planetary gear set;
a third rotation element is a third rotation element of the first planetary gear set;
a fourth rotation element, connected to the second rotation element by the first transfer gear and selectively connected to a transmission housing, is a first rotation element of the second planetary gear set;
a fifth rotation element, connected to the third rotation element by the second transfer gear and directly connected to the output shaft, and selectively connected to the fourth rotation element, is a second rotation element of the second planetary gear set;
a sixth rotation element is a third rotation element of the second planetary gear set;
a seventh rotation element, directly connected to the input shaft, is a first rotation element of the third planetary gear set;
an eighth rotation element, selectively connected to the input shaft and connected to the sixth rotation element by the third transfer gear is a second rotation element of the third planetary gear set;
a ninth rotation element, selectively connected to the transmission housing, is a third rotation element of the third planetary gear set;
and
a friction element of the six friction elements selectively connects two corresponding rotation elements to each other or selectively connects a corresponding rotation element to the transmission housing.

16 more elements

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

an input shaft receiving power of an engine;
an output shaft disposed substantially in parallel with the input shaft;
a first planetary gear set, disposed on the input shaft, the first planetary gear set being a single pinion planetary gear set having three rotation elements including a first sun gear, a first planetary carrier, and a first ring gear;
a second planetary gear set, disposed on the output shaft, the second planetary gear set being a single pinion planetary gear set having three rotation elements including a second sun gear, a second planetary carrier, and a second ring gear;
a third planetary gear set, disposed on the input shaft, the third planetary gear set being a single pinion planetary gear set having three rotation elements including a third sun gear, a third planetary carrier, and a third ring gear;
first, second, and third transfer gears;
and
six friction elements, wherein:
a first rotation element, including the first sun gear, is selectively connected to the input shaft;
a second rotation element, including the first planetary carrier, is selectively connected to the input shaft;
a third rotation element includes the first ring gear;
a fourth rotation element, including the second sun gear, is connected to the second rotation element by the first transfer gear and selectively connected to a transmission housing;
a fifth rotation element, including the second planetary carrier, is connected to the third rotation element by the second transfer gear and directly connected to the output shaft, and selectively connected to the fourth rotation element;
a sixth rotation element includes the second ring gear;
a seventh rotation element, including the third sun gear, is directly connected to the input shaft;
an eighth rotation element, including the third planetary carrier, is selectively connected to the input shaft and connected to the sixth rotation element by the third transfer gear;
a ninth rotation element, including the third ring gear, is selectively connected to the transmission housing;
and
a friction element of the six friction elements selectively connects two corresponding rotation elements to each other or selectively connects a corresponding rotation element to the transmission housing.

16 more elements

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

an input shaft receiving power of an engine;
an output shaft disposed substantially in parallel with the input shaft;
a first planetary gear set, disposed on the input shaft, is a double pinion planetary gear set having three rotation elements including a first sun gear, a first planetary carrier, and a first ring gear;
a second planetary gear set, disposed on the output shaft, is a single pinion planetary gear set having three rotation elements including a second sun gear, a second planetary carrier, and a second ring gear;
a third planetary gear set, disposed on the input shaft, is a single pinion planetary gear set having three rotation elements including a third sun gear, a third planetary carrier, and a third ring gear;
first, second, and third transfer gears;
and
six friction elements, wherein:
a first rotation element, including the first sun gear, is selectively connected to the input shaft;
a second rotation element, including the first ring gear, is selectively connected to the input shaft;
a third rotation element includes the first planetary carrier;
a fourth rotation element, including the second sun gear, is connected to the second rotation element by the first transfer gear and selectively connected to a transmission housing;
a fifth rotation element, including the second planetary carrier, is connected to the third rotation element by the second transfer gear and directly connected to the output shaft, and selectively connected to the fourth rotation element;
a sixth rotation element includes the second ring gear;
a seventh rotation element, including the third sun gear, is directly connected to the input shaft;
an eighth rotation element, including the third planetary carrier, is selectively connected to the input shaft and connected to the sixth rotation element by the third transfer gear;
a ninth rotation element, including the third ring gear, is selectively connected to the transmission housing;
and
a friction element of the six friction elements selectively connects two corresponding rotation elements to each other or selectively connects a corresponding rotation element to the transmission housing.

16 more elements

Dependencies are inferred from the claim text.

Facts

Application: 14/557,270Filed 1 Dec 2014
Priority: KR 10-2014-00860749 Jul 2014
Published: US 2016/0010733 A114 Jan 2016
Granted: 6 Sep 2016
Term ends: Not estimatedThe source records don’t support an estimate.

Classification8 codes

F16H 37/042
Combinations of toothed gearings only: change gear transmissions in group arrangement
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

Family

US 2016/0010733 A1Pre-grant publication · published 14 Jan 2016
US 9,435,414 B2This patent

From the US filing history. Foreign family members aren’t listed.

Timeline

Citations

Open elsewhere

Building an agent or pulling many patents? Use the API or MCP server instead of scraping pages. Get an API key