# US 12,214,669 B2 · Power train for vehicle

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- Number: US 12,214,669 B2
- Document ID: US12214669B2
- Status: Granted
- Kind: B2
- Application number: 17/830,728
- Filed: 2022-06-02
- Published: 2023-01-26
- Granted: 2025-02-04
- Earliest claimed: 2021-07-22
- Assignees: Hyundai Motor Company; Kia Corporation
- Applicants: Hyundai Motor Company; Kia Corporation
- Inventors: Jin Ho Kim; Yong Hwan Choi; Joo Hang Lee; Yong Hoo Kim
- Web page: https://patentgrep.com/patent/US12214669B2

## CPC

- B60K 6/387: Actuated clutches, i.e. clutches engaged or disengaged by electric, hydraulic or mechanical actuating means
- B60K 6/40: characterised by the assembly or relative disposition of components
- B60K 6/36: characterised by the transmission gearings
- B60K 6/442: Series-parallel switching type
- B60K 6/547: the transmission being a stepped gearing
- F16H 57/0018: {Shaft assemblies for gearings (camshafts with single track cams F16H53/02)}
- F16H 59/44: dependent on machine speed {, e.g. the vehicle speed} (F16H59/46 takes precedence)
- B60Y 2200/92: Hybrid vehicles
- F16H 2061/0422: {by an electric machine, e.g. by accelerating or braking the input shaft}
- Y02T 10/62: Hybrid vehicles
- 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

## Abstract

An embodiment power train for a vehicle includes a first input shaft configured to receive rotating forces from a first motor and an engine, a second input shaft configured to receive a rotating force from a second motor, an output shaft disposed in parallel with the first input shaft and the second input shaft, a transmission gear set in which a plurality of gear sets having different gear ratios are engaged with and coupled to the first input shaft and the output shaft, a shifting unit configured to select a gear set of the plurality of gear sets based on a traveling speed of the vehicle, and a motor-side transfer gear set engaged with and coupled to the second input shaft and the output shaft.

## Claims

### Claim 1

A power train for a vehicle, the power train comprising:
a first input shaft configured to receive rotating forces from a first motor and an engine, wherein the first motor is directly connected to an end of the first input shaft;
a second input shaft configured to receive a rotating force from a second motor, wherein the second motor is directly connected to an end of the second input shaft such that the first motor and the second motor are disposed in one direction;
an output shaft disposed in parallel with the first input shaft and the second input shaft;
a transmission gear set in which a plurality of gear sets having different gear ratios are engaged with and coupled to the first input shaft and the output shaft;
a shifting unit configured to select a gear set of the plurality of gear sets based on a traveling speed of the vehicle; and
a motor-side transfer gear set engaged with and coupled to the second input shaft and the output shaft.

### Claim 2 (depends on 1)

The power train of claim 1, wherein the first input shaft comprises a solid shaft and the second input shaft comprises a hollow shaft, and wherein the first input shaft is inserted into the second input shaft.

### Claim 3 (depends on 2)

The power train of claim 2, wherein the first input shaft and the second input shaft are coaxially arranged.

### Claim 4 (depends on 1)

The power train of claim 1, wherein:
an input gear of the motor-side transfer gear set is directly connected to the second input shaft; and
an output gear of the motor-side transfer gear set is directly connected to the output shaft.

### Claim 5 (depends on 1)

The power train of claim 1, further comprising an engine output shaft fixed to the engine, wherein the engine output shaft is engaged with and coupled to an end of the first input shaft by an engine-side transfer gear set.

### Claim 6 (depends on 5)

The power train of claim 5, wherein:
an input gear of the engine-side transfer gear set is directly connected to the engine output shaft; and
an output gear of the engine-side transfer gear set is directly connected to the first input shaft.

### Claim 7 (depends on 1)

The power train of claim 1, wherein:
the first motor is disposed on a first side of the second motor;
the motor-side transfer gear set is disposed on a second side of the second motor;
the engine is connected to an end of the first input shaft; and
the transmission gear set is disposed between the motor-side transfer gear set and the engine.

### Claim 8

A power train for a vehicle, the power train comprising:
a first input shaft configured to receive rotating forces from a first motor and an engine;
a second input shaft configured to receive a rotating force from a second motor;
an output shaft disposed in parallel with the first input shaft and the second input shaft;
a transmission gear set in which a plurality of gear sets having different gear ratios are engaged with and coupled to the first input shaft and the output shaft, wherein the transmission gear set comprises:
a low gear set engaged with and coupled to the first input shaft and the output shaft; and
a high gear set configured to form a gear ratio that is smaller than a gear ratio of the low gear set and is engaged with and coupled to the first input shaft and the output shaft;
a shifting unit configured to select a gear set of the plurality of gear sets based on a traveling speed of the vehicle, wherein the shifting unit is fixed to the first input shaft and selectively engaged with an input gear of the low gear set and an input gear of the high gear set; and
a motor-side transfer gear set engaged with and coupled to the second input shaft and the output shaft.

### Claim 9 (depends on 8)

The power train of claim 8, wherein one of an output gear of the low gear set or an output gear of the high gear set directly connected to the output shaft is engaged with and coupled to a ring gear of a differential.

### Claim 10 (depends on 8)

The power train of claim 8, wherein an output gear of the high gear set is engaged with and coupled to a ring gear of a differential.

### Claim 11

A vehicle comprising:
a first motor;
a second motor;
an engine;
a first input shaft configured to receive rotating forces from the first motor and the engine, wherein the first motor is directly connected to an end of the first input shaft;
a second input shaft configured to receive a rotating force from the second motor, wherein the second motor is directly connected to an end of the second input shaft such that the first motor and the second motor are disposed in one direction;
an output shaft disposed in parallel with the first input shaft and the second input shaft;
a transmission gear set in which a plurality of gear sets having different gear ratios are engaged with and coupled to the first input shaft and the output shaft;
a shifting unit configured to select a gear set of the plurality of gear sets based on a traveling speed of the vehicle; and
a motor-side transfer gear set engaged with and coupled to the second input shaft and the output shaft.

### Claim 12 (depends on 11)

The vehicle of claim 11, wherein the first input shaft comprises a solid shaft and the second input shaft comprises a hollow shaft, wherein the first input shaft is inserted into the second input shaft, and wherein the first input shaft and the second input shaft are coaxially arranged.

### Claim 13 (depends on 11)

The vehicle of claim 11, further comprising an engine output shaft fixed to the engine, wherein the engine output shaft is engaged with and coupled to an end of the first input shaft by an engine-side transfer gear set.

### Claim 14 (depends on 11)

The vehicle of claim 11, wherein:
the first motor is disposed on a first side of the second motor;
the motor-side transfer gear set is disposed on a second side of the second motor;
the engine is connected to an end of the first input shaft; and
the transmission gear set is disposed between the motor-side transfer gear set and the engine.

### Claim 15 (depends on 11)

The vehicle of claim 11, wherein the transmission gear set comprises:
a low gear set engaged with and coupled to the first input shaft and the output shaft; and
a high gear set configured to form a gear ratio that is smaller than a gear ratio of the low gear set and is engaged with and coupled to the first input shaft and the output shaft, wherein the shifting unit is fixed to the first input shaft and selectively engaged with an input gear of the low gear set and an input gear of the high gear set.

### Claim 16 (depends on 15)

The vehicle of claim 15, wherein one of an output gear of the low gear set or an output gear of the high gear set directly connected to the output shaft is engaged with and coupled to a ring gear of a differential.

### Claim 17 (depends on 15)

The vehicle of claim 15, wherein an output gear of the high gear set is engaged with and coupled to a ring gear of a differential.