# US 2019/0168599 A1 · Multi-stage dual clutch transmission for hybrid vehicle

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- Number: US 2019/0168599 A1
- Document ID: US20190168599A1
- Status: Published application
- Kind: A1
- Application number: 15/949,926
- Filed: 2018-04-10
- Published: 2019-06-06
- Earliest claimed: 2017-12-04
- Assignees: Hyundai Motor Company; Kia Motors Corporation
- Applicants: Hyundai Motor Company; Kia Motors Corporation
- Inventors: Soon Ki Eo; Woo Churl Son; Sun Sung Kwon; Seong Wook Hwang
- Web page: https://patentgrep.com/patent/US20190168599A1

## CPC

- B60K 6/36: characterised by the transmission gearings
- B60K 6/383: One-way clutches or freewheel devices
- B60K 6/387: Actuated clutches, i.e. clutches engaged or disengaged by electric, hydraulic or mechanical actuating means
- B60K 6/48: Parallel type
- B60K 6/547: the transmission being a stepped gearing
- F16H 3/006: {power being selectively transmitted by parallel flow paths, e.g. dual clutch transmissions}
- F16H 3/085: with more than one output shaft
- B60K 2006/4808: {Electric machine connected or connectable to gearbox output shaft}
- B60K 2006/4816: {Electric machine connected or connectable to gearbox internal shaft}
- B60K 2006/4841: {the gear provides shifting between multiple ratios}
- B60Y 2200/92: Hybrid vehicles
- F16H 2003/0931: {each countershaft having an output gear meshing with a single common gear on the output shaft}
- F16H 2200/0056: the gear ratios comprising seven forward speeds
- Y02T 10/62: Hybrid vehicles
- Y10S 903/909: Gearing
- Y10S 903/919: Stepped shift
- B60K: ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- F16H: GEARING
- B60Y: INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
- Y02T: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y10S: TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS

## Abstract

A multi-stage dual clutch transmission for a vehicle includes: a first input shaft selectively connectable to an engine through a first clutch and having odd driving gears fixed thereon; a second input shaft disposed coaxially with the first input shaft, selectively connectable to the engine through a second clutch, and having even driving gears fixed thereon; a first output shaft and a second output shaft disposed in parallel with the first and second input shafts and have odd and even driven gears being freely rotatable thereon in mesh with the odd and even driving gears, respectively; and a motor shaft disposed in parallel with the first and second output shafts, connected to a motor, having first and second delivery gears being freely rotatable thereon, and having first and second one-way clutches transmitting power to the first and second delivery gears, respectively, when rotating in a predetermined direction thereof.

## Claims

### Claim 1

A multi-stage dual clutch transmission apparatus for a vehicle, the multi-stage dual clutch transmission comprising:
a first input shaft selectively connectable to an engine through a first clutch and having odd driving gears fixed thereon;
a second input shaft disposed coaxially with the first input shaft, wherein the second input shaft is selectively connectable to the engine through a second clutch, and has even driving gears fixed thereon;
a first output shaft and a second output shaft disposed in parallel with the first and second input shafts and having odd and even driven gears being freely rotatable thereon in mesh with the odd and even driving gears, respectively; and
a motor shaft configured to be disposed in parallel with the first and second output shafts, be connected to a motor, to have first and second delivery gears being freely rotatable on the motor shaft, and to have first and second one-way clutches transmitting power to the first and second delivery gears respectively, wherein each of the first and second one-way clutches is configured to transmit the power when rotating in a predetermined direction thereof,
wherein the first delivery gear is engaged with one of the odd driven gears or the even driven gears, and
the second delivery gear is engaged with an even driving gear among the even driven gears when the first delivery gear is engaged with an odd driven gear among the odd driven gears, and is engaged with an odd driving gear among the odd driven gears when the first delivery gear is engaged with an even driven gear among the even driven gears.

### Claim 2 (depends on 1)

The multi-stage double clutch transmission apparatus of claim 1, wherein a rotation direction of the first one-way clutch for transmitting power to the first delivery gear is opposite to a rotation direction of the second one-way clutch for transmitting power to the second delivery gear.

### Claim 3 (depends on 2)

The multi-stage double clutch transmission apparatus of claim 2, further including a plurality of synchronizers disposed on the first output shaft and the second output shaft to selectively couple the odd driven gears and the even driven gears to corresponding output shafts among the first output shaft and the second output shaft.

### Claim 4 (depends on 2)

The multi-stage double clutch transmission apparatus of claim 2, further including a reverse shaft configured to allow a first reverse gear being gear-meshed with one of the even driving gears provided on the second input to rotate freely and to allow a second reverse gear in mesh with a reverse driven gear provided on the second output shaft to rotate freely, wherein the second reverse gear is connected to and is rotatable with the first reverse gear.

### Claim 5 (depends on 2)

The multi-stage double clutch transmission apparatus of claim 2, further including a reverse gear disposed to rotate freely on the motor shaft and coaxially connected to the first delivery gear,
wherein the first delivery gear is gear-meshed with one of the even driving gears on the second input shaft,
the second delivery gear is gear-meshed with one of the odd driven gears on the first output shaft or the second output shaft, and
the reverse gear is gear-meshed with the reverse driven gear.

### Claim 6 (depends on 1)

The multi-stage double clutch transmission apparatus of claim 1, further including a parking gear in mesh with one of the odd driving gears.

### Claim 7

A multi-stage dual clutch transmission apparatus for a vehicle, the multi-stage dual clutch transmission apparatus comprising:
a first input shaft selectively connectable to an engine through a first clutch and having odd driving gears fixed thereon;
a second input shaft disposed coaxially with the first input shaft, selectively connectable to the engine through a second clutch, and having even driving gears fixed thereon;
a first output shaft and a second output shaft disposed in parallel with the first and second input shafts and having odd and even driven gears being freely rotatable on the first output shaft and the second output shaft in mesh with the odd and even driving gears, respectively; and
a motor shaft configured to be disposed in parallel with the first output shaft and the second output shaft, to be connected to a motor, to have first and second delivery gears being freely rotatable on the motor shaft, and to have first and second two-way clutches fixed thereon to transmit power to the first and second delivery gears when rotated in a predetermined direction thereof, respectively, by actuators,
wherein the first delivery gear is engaged with one of the odd driven gears or the even driven gears, and
the second delivery gear is engaged with an even driving gear among the even driven gears when the first delivery gear is engaged with an odd driven gear among the odd driven gears, and is engaged with an odd driving gear among the odd driven gears when the first delivery gear is engaged with an even driven gear among the even driven gears.

### Claim 8 (depends on 7)

The multi-stage double clutch transmission apparatus of claim 7, further including a parking gear in mesh with one of the odd driving gears.