# US 12,000,450 B2 · Torque transfer device having a control system for determining the direction of rotation of the rotor

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- Number: US 12,000,450 B2
- Document ID: US12000450B2
- Status: Granted
- Kind: B2
- Application number: 17/058,372
- Filed: 2019-06-03
- Published: 2021-07-01
- Granted: 2024-06-04
- Earliest claimed: 2018-06-26
- Assignees: Schaeffler Technologies AG & Co. KG
- Applicants: Schaeffler Technologies AG & Co. KG
- Inventors: Johannes Herrmann
- Web page: https://patentgrep.com/patent/US12000450B2

## CPC

- F16F 15/002: {characterised by the control method or circuitry (control of mechanical oscillations per se G05D19/00)}
- F16F 15/12: using elastic members or friction-damping members, e.g. between a rotating shaft and a gyratory mass mounted thereon ({F16F15/14} , F16F15/16 take precedence)
- F02N 11/0859: {specially adapted to the type of the starter motor or integrated into it}
- F16F 15/145: {Masses mounted with play with respect to driving means thus enabling free movement over a limited range}
- F16F 15/26: of crankshaft systems using solid masses, other than the ordinary pistons, moving with the system {, i.e. masses connected through a kinematic mechanism or gear system (F16F15/226 takes precedence)}
- H02P 6/18: without separate position detecting elements
- H02P 7/03: for controlling the direction of rotation of DC motors
- B60K 2006/268: {Electric drive motor starts the engine, i.e. used as starter motor}
- B60Y 2400/48: Vibration dampers, e.g. dual mass flywheels
- Y02T 10/62: Hybrid vehicles
- F16F: SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F02N: STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
- H02P: CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- 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
- B60Y: INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
- Y02T: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION

## Abstract

A torque transfer device is provided, for a powertrain of a motor vehicle, comprising an electric motor having a stator and a rotor rotatable relative thereto. A control system is provided which can output a current pulse to the electric motor, wherein the current pulse effects a rotary motion of the rotor in a first direction of rotation and through a first angle of rotation and thus effects an induced voltage, which is received by the control system to determine the direction of rotation or the rotary position of the rotor in relation to the stator. The rotor is connected to a torsional vibration damper comprising a damper input and a damper output; rotatable in a limited manner in relation to the damper input, against the effect of energy storage elements, and the rotary motion of the rotor causes a relative rotation between the damper input and the damper output.

## Claims

### Claim 1

A torque transfer device, for a powertrain of a motor vehicle, comprising:
an electric motor having a stator and a rotor rotatable relative thereto,
a control system configured to output a current pulse to the electric motor, wherein the current pulse effects a rotary motion of the rotor in a first direction of rotation and through a first angle of rotation and thus effects an induced voltage, which is received by the control system and by which the control system determines the direction of rotation or the rotary position of the rotor in relation to the stator,
wherein the rotor is connected to a torsional vibration damper comprising a damper input and a damper output, wherein the damper output is rotatable in a limited manner in relation to the damper input, against an effect of energy storage elements, and the rotary motion of the rotor brings about a relative rotation between the damper input and damper output,
wherein the rotor is connected to the damper output and the rotary motion of the rotor causes a rotary motion of the damper output through a second angle of rotation, and
wherein the rotary motion of the rotor causes a rotary motion of the damper input through a third angle of rotation which is smaller than the first or second angle of rotation.

### Claim 2 (depends on 1)

The torque transfer device according to claim 1, wherein the electric motor is electrically controllable by at least three motor phases and the control system is configured to output the current pulse via a first motor phase and the induced voltage via second and third motor phases.

### Claim 3 (depends on 1)

The torque transfer device according to claim 1, wherein a crankshaft of an internal combustion engine is connected to the damper input.

### Claim 4 (depends on 3)

The torque transfer device according to claim 3, wherein the current pulse is output when the internal combustion engine is stationary, i.e., not rotating.

### Claim 5 (depends on 3)

The torque transfer device according to claim 3, wherein the electric motor is designed as a starter generator and can mechanically start the internal combustion engine.

### Claim 6 (depends on 3)

The torque transfer device according to claim 3, wherein the internal combustion engine is configured to transfer a torque via a K0 clutch to an output side or is configured to transfer a torque to the electric motor.

### Claim 7 (depends on 6)

The torque transfer device according to claim 6, wherein a second electric motor is provided for torque transfer to the output side.

### Claim 8 (depends on 1)

The torque transfer device according to claim 1, wherein the electric motor is connected to the torsional vibration damper via a transmission.