# US 11,299,026 B2 · Hybrid powertrain with two electric machines and an internal combustion engine

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- Number: US 11,299,026 B2
- Document ID: US11299026B2
- Status: Granted
- Kind: B2
- Application number: 16/765,698
- Filed: 2018-10-23
- Published: 2021-07-29
- Granted: 2022-04-12
- Earliest claimed: 2017-11-23
- Assignees: Schaeffler Technologies AG & Co. KG
- Applicants: Schaeffler Technologies AG & Co. KG
- Inventors: Steffen Lehmann; Andreas Trinkenschuh
- Web page: https://patentgrep.com/patent/US11299026B2

## CPC

- B60K 6/26: characterised by the motors or the generators
- B60K 6/387: Actuated clutches, i.e. clutches engaged or disengaged by electric, hydraulic or mechanical actuating means
- B60K 6/24: characterised by the combustion engines
- B60K 6/36: characterised by the transmission gearings
- B60K 6/38: characterised by the driveline clutches (shift clutches within the gearing or transmission B60K6/36)
- B60K 6/40: characterised by the assembly or relative disposition of components
- B60K 6/442: Series-parallel switching type
- B60K 6/48: Parallel type
- B60W 10/06: including control of combustion engines
- B60W 10/08: including control of electric propulsion units, e.g. motors or generators
- B60W 20/20: Control strategies involving selection of hybrid configuration, e.g. selection between series or parallel configuration
- B60K 2006/266: {with two coaxial motors or generators}
- B60K 2006/4825: {Electric machine connected or connectable to gearbox input shaft}
- B60K 2006/4833: {Step up or reduction gearing driving generator, e.g. to operate generator in most efficient speed range}
- B60L 2240/423: Torque
- B60W 2510/0208: Clutch engagement state, e.g. engaged or disengaged
- B60Y 2200/92: Hybrid vehicles
- B60Y 2400/42: Clutches or brakes
- B60Y 2400/60: Electric Machines, e.g. motors or generators
- F16D 25/082: {the line of action of the fluid-actuated members co-inciding with the axis of rotation}
- 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
- B60W: CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60L: PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES (arrangements or mounting of electrical propulsion units or of plural diverse prime-movers for mutual or common propulsion in vehicles B60K1/00, B60K6/20; arrangements or mounting of electrical gearing in vehicles B60K17/12, B60K17/14; preventing wheel slip by reducing power in rail vehicles B61C15/08; dynamo-electric machines H02K; control or regulation of electric motors H02P); SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES (electric coupling devices combined with mechanical couplings of vehicles B60D1/64; electric heating for vehicles B60H1/00); ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL (control or regulation of electric motors H02P); MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60Y: INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
- F16D: COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- Y02T: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION

## Abstract

A drive train for a hybrid motor vehicle comprises a gearbox input shaft, which is operably linked to a first electric machine and an internal combustion engine by a first partial drive train for torque transmission and is operably linked to a second electric machine by a second partial drive train for torque transmission. The second electric machine is permanently connected to the gearbox input shaft for torque transmission. The first electric machine and the internal combustion engine can be connected in a couplable manner to the gearbox input shaft for torque transmission.

## Claims

### Claim 1

A drive train for a hybrid motor vehicle, comprising a gearbox input shaft, which is operably linked to a first electric machine and an internal combustion engine by a first partial drive train for torque transmission and is operably linked to a second electric machine by a second partial drive train for torque transmission, wherein the second electric machine is permanently connected to the gearbox input shaft for torque transmission, and the first electric machine and the internal combustion engine can be connected in a couplable manner to the gearbox input shaft for torque transmission, wherein a driven shaft of the first electric machine is arranged radially inside a driven shaft of the second electric machine, wherein one side of the first electric machine is mounted in a gearbox housing, and another side thereof is mounted on the driven shaft of the second electric machine, or in that one side of the second electric machine is mounted in a gearbox housing, and another side thereof is mounted on the driven shaft of the first electric machine.

### Claim 2 (depends on 1)

The drive train as claimed in claim 1, wherein the first electric machine and the second electric machine are arranged coaxially with one another.

### Claim 3 (depends on 1)

The drive train as claimed in claim 1, wherein a switchable clutch is arranged between the second partial drive train comprising the second electric machine and the first partial drive train comprising the first electric machine and the internal combustion engine, the first electric machine and the second electric machine rotating at the same speed when the clutch is closed.

### Claim 4 (depends on 3)

The drive train as claimed in claim 3, wherein only one clutch is arranged in the drive train.

### Claim 5 (depends on 3)

The drive train as claimed in claim 3, wherein the drive train is configured in such a way that it allows operation in a first operating mode for purely electric power, in which the clutch is open, and only the second electric machine acts as a prime mover for the gearbox input shaft, and/or in a second operating mode for a series hybrid drive system, in which the clutch is open, the second electric machine acts as a prime mover for the gearbox input shaft, and the internal combustion engine acts as a prime mover for the first electric machine to generate electrical energy, and/or in a third operating mode for a parallel hybrid drive system, in which the internal combustion engine and additionally the first electric machine and/or the second electric machine acts as a prime mover for the gearbox input shaft.

### Claim 6 (depends on 1)

The drive train as claimed in claim 1, wherein the first electric machine is permanently connected to the internal combustion engine for torque transmission.

### Claim 7 (depends on 1)

The drive train as claimed in claim 1, wherein only one transmission stage is formed between the internal combustion engine and the first electric machine, and the second electric machine.

### Claim 8 (depends on 7)

The drive train as claimed in claim 7, wherein the first electric machine and the second electric machine are arranged in an axial direction on one side of the transmission stage, and the internal combustion engine is arranged in the axial direction on the other side of the transmission stage.