10-stage dual clutch transmission for vehicle

Patent metadata

Field	Value
Publication number	US-9644708-B2
Application number	US-201514880937-A
Country	US
Kind code	B2
Filing date	Oct 12, 2015
Priority date	May 21, 2015
Publication date	May 9, 2017
Grant date	May 9, 2017

Abstract

A 10-stage dual clutch transmission (DCT) for a vehicle includes: a first input shaft receiving power through a first clutch; a second input shaft disposed coaxially with the first input shaft and receiving power through a second clutch; a plurality of odd driving gears disposed on the first input shaft; a plurality of even driving gears disposed on the second input shaft; a first output shaft and a second output shaft disposed in parallel with the first input shaft and the second input shaft; a plurality of odd driven gears each disposed on the first output shaft or the second output shaft; a plurality of even driven gears disposed each on the first output shaft or the second output shaft; and a joint synchro disposed on the first output shaft or the second output shaft.

First claim

What is claimed is:

1. A 10-stage dual clutch transmission (DCT) for a vehicle, comprising:
a first input shaft receiving power through a first clutch;
a second input shaft disposed coaxially with the first input shaft and receiving power through a second clutch;
odd driving gears disposed on the first input shaft to implement odd gear shift steps of a 1st gear shift step to a 9th gear shift step;
even driving gears disposed on the second input shaft to implement even gear shift steps of a 2nd gear shift step to a 8th gear shift step;
a first output shaft and a second output shaft each disposed in parallel with the first input shaft and the second input shaft;
odd driven gears each disposed on the first output shaft or the second output shaft to implement the odd gear shift steps by engaging with the odd driving gears;
even driven gears each disposed on the first output shaft or the second output shaft to implement the even gear shift steps by engaging with the even driving gears; and
a joint synchro disposed on the first output shaft or the second output shaft and selectively coupling any one of the odd driven gears on the corresponding shaft to any one of the even driven gears,
wherein the odd driving gears on the first input shaft comprise a first driving gear for implementing the 1st gear shift step, a third-fifth driving gear for implementing a 3rd gear shift step and a 5th gear shift step, and a seventh-ninth driving gear for implementing a 7th gear shift step and the 9th gear shift step, and
wherein the even driving gears on the second input shaft comprise a second driving gear for implementing the 2nd gear shift step, a fourth-reverse driving gear for implementing a 4th gear shift step and a reverse gear shift step, and a sixth-eighth driving gear for implementing a 6th gear shift step and an 8th gear shift step.

2. The 10-stage DCT of claim 1 , wherein:
the odd driven gears and the even driven gears on the first output shaft comprise a first driven gear for implementing the 1st gear shift step, a second driven gear for implementing the 2nd gear shift step, a third driven gear for implementing the 3rd gear shift step, a sixth driven gear for implementing the 6th gear shift step, and a seventh driven gear for implementing the 7th gear shift step, and
the odd driven gears and the even driven gears on the second output shaft comprise a fourth driven gear for implementing the 4th gear shift step, a fifth driven gear for implementing the 5th gear shift step, an eighth driven gear for implementing the 8th gear shift step, and a ninth driven gear for implementing the 9th gear shift step.

3. The 10-stage DCT of claim 2 , wherein,
the fifth driven gear and the eighth driven gear are adjacent to each other on the second output shaft, and
the joint synchro couples or decouples the fifth driven gear and the eighth driven gear to or from each other.

4. The 10-stage DCT of claim 2 , wherein:
the second driven gear, the sixth driven gear, the first driven gear, the third driven gear, and the seventh driven gear are sequentially disposed on the first output shaft, and
a reverse driven gear for the reverse gear shift step is disposed between the second driven gear and the sixth driven gear on the first output shaft.

5. The 10-stage DCT of claim 4 further comprising:
an idler shaft disposed in parallel with the first output shaft;
a first idler gear rotatably disposed on the idler shaft and engaged with the fourth driving gear; and
a second idler gear integrally connected with the first idler gear and engaged with the reverse driven gear.

6. The 10-stage DCT of claim 2 , wherein a parking gear is integrally disposed on the second output shaft in parallel with the second driving gear and the second driven gear.

7. The 10-stage DCT of claim 2 , wherein:
the fourth driven gear, the eighth driven gear, the fifth driven gear, and the ninth driven gear are sequentially disposed on the second output shaft,
a first output gear for receiving power in mesh with a differential is integrally disposed on the first output shaft, and
a second output gear for receiving power in mesh with the differential separately from the first output gear is integrally disposed on the second output shaft.

Assignees

• Hyundai Motor Co Ltd

Inventors

• Gwon Yeo Hyeon
• Son Choung Wan
• Kim Hyun Chul
• Seo Jin Beom
• Park Ki Jong

Classifications

• F16H2200/2035

  with two engaging means · CPC title

• F16H2200/0069

  the gear ratios comprising ten forward speeds · CPC title

• F16H2003/0933

  with coaxial countershafts · CPC title

• F16H2003/0931

  each countershaft having an output gear meshing with a single common gear on the output shaft · CPC title

• F16H2003/0807

  with gear ratios in which the power is transferred by axially coupling idle gears to each other · CPC title