HYBRID DRIVE, IN PARTICULAR, FOR A MOTOR VEHICLE

• US 20090288894A1
• Filed: 06/23/2009
• Published: 11/26/2009
• Est. Priority Date: 01/12/2007
• Status: Active Grant

• Current Assignee: Voith Patent Gmbh
• Original Assignee: Voith Patent Gmbh
• Inventors: Rose, Peter
• Granted Patent: US 7,690,454 B2
• Time in Patent Office: Days
• US Class Current: 180/65.220
• CPC Class Codes: B60K 6/26 characterised by the motors or the generators
• CPC Class Codes: B60K 6/365 with the gears having orbital motion
• CPC Class Codes: B60K 6/40 characterised by the assembly or relative disposition of components
• CPC Class Codes: B60K 6/405 Housings
• CPC Class Codes: B60K 6/48 Parallel type
• CPC Class Codes: B60K 6/547 the transmission being a stepped gearing
• CPC Class Codes: B60Y 2200/14 Trucks; Load vehicles, Busses
• CPC Class Codes: F16H 47/085 with at least two mechanical connections between the hydraulic device and the mechanical transmissions
• CPC Class Codes: Y02T 10/62 Hybrid vehicles

Abstract

A hybrid drive, in particular, for a motor vehicle, includes: an internal combustion engine and a transmission disposed on the output side of the internal combustion engine, which transmission is drivable by the internal combustion engine; and an electric motor associated with the transmission having an electrically driven rotor through which the transmission is additionally drivable. The transmission includes an input shaft that is driven by the internal combustion engine and runs in the longitudinal direction of the transmission, an output shaft to drive a machine disposed on the output side of the transmission, or drive wheels in the case of a vehicle, and a plurality of manually or automatically shiftable gear stages to set the various gear ratios between the input shaft and the output shaft. The electric motor at its longitudinal axis and/or rotational axis of its rotor is attached to the output shaft in parallel or essentially parallel fashion laterally externally to the transmission.

Claims

1. A hybrid drive, comprising:

an internal combustion engine including an output side;

a transmission disposed on said output side of said internal combustion engine, said transmission being drivable by said internal combustion engine, said transmission including an input shaft that is driven by said internal combustion engine and that runs in a longitudinal direction of said transmission, an output side, an output shaft to drive one of a machine disposed on said output side of said transmission and, in a case of a motor vehicle, a plurality of drive wheels, a plurality of one of manually and automatically shiftable gear stages for setting a plurality of different gear ratios between said input shaft and said output shaft, a hydrodynamic torque converter, a differential gear disposed, as viewed in a direction of a power flow from said input shaft to said output shaft, ahead of said hydrodynamic torque converter, and a mechanical power take-off, said differential gear splitting said power flow simultaneously between said hydrodynamic torque converter and said mechanical power take-off disposed within said power flow parallel to said hydrodynamic torque converter;

an electric motor associated with said transmission and including an electrically driven rotor through which said transmission is additionally drivable, said electric motor being attached to said transmission laterally externally by at least one of a longitudinal axis of said electric motor and a rotational axis of said rotor of said electric motor one of parallel and essentially parallel to said input shaft, said electric motor being in a driving connection with one input of said differential gear to feed a driving power from said electric motor through said differential gear into said transmission.

2. The hybrid drive according to claim 1, wherein the hybrid drive is for a motor vehicle.

3. The hybrid drive according to claim 1, wherein said differential gear has an external wheel drive accommodating at least one of a plurality of gear stages and a plurality of clutches of said transmission that is driven by said electric motor.

4. The hybrid drive according to claim 3, wherein said plurality of clutches includes a plurality of multi-disk clutches.

5. The hybrid drive according to claim 1, wherein said differential gear has an external wheel drive accommodating an external gear of said transmission that is driven by said electric motor.

6. The hybrid drive according to claim 1, wherein said output shaft runs in said longitudinal direction of said transmission.

7. The hybrid drive according to claim 1, wherein said output shaft runs in said longitudinal direction of said transmission and is aligned with said input shaft.

8. The hybrid drive according to claim 1, wherein said output shaft runs in said longitudinal direction of said transmission and is parallel to said rotational axis of said electric motor.

9. The hybrid drive according to claim 1, wherein said electric motor is in a driving connection with an auxiliary power take-off of said transmission, through which said auxiliary power take-off said driving power from said electric motor is introducible, as viewed in said direction of said power flow from said input shaft to said output shaft, ahead of said shiftable gear stages.

10. The hybrid drive according to claim 9, wherein said input shaft supports a gear of said transmission in a region of said transmission corresponding to a drive face of said transmission facing said internal combustion engine, said gear being, through an intermediate gear, in a driving connection with a rotor gear on said electrically driven rotor of said electric motor.

11. The hybrid drive according to claim 9, wherein said input shaft is attached in a rotationally fixed manner to a gear of said transmission in a region of said transmission corresponding to a drive face of said transmission facing said internal combustion engine, said gear being, through an intermediate gear, in a driving connection with a rotor gear on said electrically driven rotor of said electric motor.

12. The hybrid drive according to claim 9, wherein said input shaft one of has and is attached in a rotationally fixed manner to a pulley in a region of said transmission corresponding to a drive face of said transmission facing said internal combustion engine, said pulley being in a driving connection through at least one belt with said rotor of said electric motor.

13. The hybrid drive according to claim 12, wherein said belt is one of a V-belt and a toothed belt.

14. The hybrid drive according to claim 9, wherein said input shaft one of has and is attached in a rotationally fixed manner to a pulley in a region of said transmission corresponding to a drive face of said transmission facing said internal combustion engine, said pulley being in a driving connection through at least one belt with said rotor of said electric motor through a second pulley supported by said rotor.

15. The hybrid drive according to claim 1, wherein said electric motor is in a driving connection with an auxiliary power take-off of said transmission, through which said auxiliary power take-off said driving power from said electric motor is introducible, as viewed in said direction of said power flow from said input shaft to said output shaft, ahead of said hydrodynamic torque converter provided in said transmission.

16. The hybrid drive according to claim 1, wherein said electric motor is in a driving connection with an auxiliary power take-off of said transmission, through which said driving power from said electric motor is introducible, as viewed in said direction of said power flow from said input shaft to said output shaft, ahead of said hydrodynamic torque converter provided in said transmission, and is introducible one of onto said input shaft and behind said input shaft into said transmission.

17. The hybrid drive according to claim 1, wherein said electric motor is connected through at least one reduction stage to said transmission.

18. The hybrid drive according to claim 1, wherein said electric motor is connected through at least one reduction stage to said input shaft of said transmission.

19. The hybrid drive according to claim 1, wherein said electric motor is connected through at least one reduction stage to a rotational element of said transmission, said rotational element rotating at a speed of said input shaft, said rotational element being attached in a rotationally fixed manner to said input shaft.

20. The hybrid drive according to claim 1, wherein said electric motor is in a driving connection with one of a gear and a pulley in said transmission, said one of said gear and said pulley being disposed within said transmission in one of an oil-free space and an oil-filled space sealed from the environment.

21. The hybrid drive according to claim 1, wherein said electric motor, at an end face of said electric motor on which said rotor is disposed, is mounted in an overhung position on a housing of said transmission, said housing enclosing a plurality of components of said transmission and said driving connection between said electric motor and said transmission.

22. The hybrid drive according to claim 21, wherein said electric motor, at an end face of said electric motor on which said rotor is disposed, is mounted in an overhung position on a housing of said transmission, said housing enclosing a plurality of components of said transmission and said driving connection between said electric motor and said transmission including said rotor.

23. The hybrid drive according to claim 21, wherein said housing of said transmission includes a bracket enclosing said driving connection between said electric motor and said transmission, said bracket being disposed in a region of said transmission corresponding to a drive face of said transmission facing said internal combustion engine, said bracket running perpendicular to said input shaft.