Hybrid drive having an automated conventional gearbox

• US 9,541,180 B2
• Filed: 05/05/2011
• Issued: 01/10/2017
• Est. Priority Date: 06/28/2010
• Status: Active Grant

• Current Assignee: ZF Friedrichshafen AG (Zeppelin - Stiftung der Stadt Friedrichshafen)
• Original Assignee: ZF Friedrichshafen AG (Zeppelin - Stiftung der Stadt Friedrichshafen)
• Inventors: Kaltenbach, Johannes
• Primary Examiner(s): Kelleher, William
• Assistant Examiner(s): Agendia, Jude
• Application Number:
  US13/806,630
• Publication Number:
  US 20130186233A1
• Time in Patent Office: 2,077 Days
• Field of Search: 743/30, 743/31, 743/33, 746/61, 180/65.21, 180/65.225, 180/65.24, 903/902, 903/906
• US Class Current: 1/1
• CPC Class Codes: B60K 2006/268 Electric drive motor starts the engine, i.e. used as starter motor
• CPC Class Codes: B60K 2006/4808 Electric machine connected or connectable to gearbox output shaft
• CPC Class Codes: B60K 2006/4816 Electric machine connected or connectable to gearbox internal shaft
• CPC Class Codes: B60K 2006/4825 Electric machine connected or connectable to gearbox input shaft
• CPC Class Codes: B60K 2006/4833 Step up or reduction gearing driving generator, e.g. to operate generator in most efficient speed range
• CPC Class Codes: B60K 2006/4841 the gear provides shifting between multiple ratios
• CPC Class Codes: B60K 2006/541 without reverse ratio using instead electric reversing
• CPC Class Codes: B60K 6/36 characterised by the transmission gearings
• CPC Class Codes: B60K 6/387 Actuated clutches, i.e. clutches engaged or disengaged by electric, hydraulic or mechanical actuating means
• CPC Class Codes: B60K 6/442 Series-parallel switching type
• CPC Class Codes: B60K 6/48 Parallel type
• CPC Class Codes: B60K 6/547 the transmission being a stepped gearing
• CPC Class Codes: B60Y 2200/92 Hybrid vehicles
• CPC Class Codes: B60Y 2400/421 Dog type clutches or brakes
• CPC Class Codes: B60Y 2400/47 Starter generator drive systems
• CPC Class Codes: B60Y 2400/70 Gearings
• CPC Class Codes: F16H 2003/007 with two flow paths, one being directly connected to the input, the other being connected to the input though a clutch
• CPC Class Codes: F16H 2061/0422 by an electric machine, e.g. by accelerating or braking the input shaft
• CPC Class Codes: F16H 2061/0433 by torque supply with an electric motor
• CPC Class Codes: F16H 2200/0047 the gear ratios comprising five forward speeds
• CPC Class Codes: F16H 2200/0052 : the gear ratios comprising six forward speeds
• CPC Class Codes: F16H 3/089 : all of the meshing gears being supported by a pair of parallel shafts, one being the input shaft and the other the output shaft, there being no countershaft involved
• CPC Class Codes: F16H 3/0915 : with coaxial input and output shafts
• CPC Class Codes: F16H 3/126 : using an electric drive
• CPC Class Codes: F16H 37/065 : with a plurality of driving or driven shafts F16H37/08 takes precedence
• CPC Class Codes: F16H 37/0806 : with a plurality of driving or driven shafts
• CPC Class Codes: F16H 61/0403 : Synchronisation before shifting
• CPC Class Codes: Y02T 10/62 : Hybrid vehicles
• CPC Class Codes: Y10S 903/902 : Prime movers comprising electrical and internal combustion motors
• CPC Class Codes: Y10S 903/909 : Gearing
• CPC Class Codes: Y10S 903/914 : Actuated, e.g. engaged or disengaged by electrical, hydraulic or mechanical means
• CPC Class Codes: Y10S 903/919 : Stepped shift
• CPC Class Codes: Y10T 74/19014 : Plural prime movers selectively coupled to common output

Abstract

A hybrid drive for a motor vehicle comprising a first transmission input shaft for connecting to a first internal combustion engine, a second transmission input shaft, which is coaxial to the first transmission input shaft and connects to a first electric motor, a layshaft, a first gear shifting device connecting the first transmission input shaft and the second transmission input shaft in a first shifting setting and engaging a gear in a second shifting setting, and a transmission output shaft.

Claims

1. A hybrid drive for a motor vehicle, comprising:

a first transmission input shaft for connectable to a first internal combustion engine;

a second transmission input shaft, being coaxial to the first transmission input shaft, and connected to a first electric motor;

a plurality of gear set planes for forward gears, the plurality of gear set planes including at least two gear set planes dedicated to the second transmission input shaft, and wherein the remaining gear set planes of the plurality of gear set planes are dedicated to the first transmission input shaft;

a layshaft;

a first gear shifting device and a second gear shifting device, wherein the first gear shifting device connects the first transmission input shaft and the second transmission input shaft in a first shifting setting and selects a transmission gear setting in a second shifting setting; and

a transmission output shaft,

wherein the first transmission input shaft is connectable to the first internal combustion engine directly or via a clutch,

wherein the second gear shifting device is configured as a jaw clutch coupling and is disposed on one of the layshaft and the second input shaft, and

wherein the transmission output shaft is disposed axially parallel to the first transmission input shaft.

2. The hybrid drive according to claim 1, further comprising a second electric motor being on the first transmission input shaft between the internal combustion engine and the first gear shifting device.

3. The hybrid drive according to claim 1, further comprising an output gearwheel being on the transmission output shaft, in a non-rotational manner with respect to the transmission output shaft, and between a gear set plane for a second gear and a gear set plane for a third gear, wherein the output gearwheel engages with a differential transmission.

4. The hybrid drive according to claim 1, wherein the second transmission input shaft is a hollow shaft at least partially encompassing the first transmission input shaft;

and

one of a fixed gear and an idler gear is disposed on the second transmission input shaft.

5. The hybrid drive according to claim 1, wherein reversely rotating the first electric motor serves a reverse gear.

6. The hybrid drive according to claim 1, wherein the first electric motor is actuated as a synchronization.

7. The hybrid drive according to claim 1, wherein the first electric motor is actuated as an integrated starter generator for starting the internal combustion engine and as a generator for charging an energy storage device.

8. The hybrid drive according to claim 1, wherein the internal combustion engine and the first electric motor are disposed diametrically opposite one another.

9. The hybrid drive according to claim 1 further comprising third and fourth gear shifting devices, wherein the first transmission input shaft connects to the internal combustion engine via a start-up clutch,

one gear set plane is provided for a reverse gear and one output constant is provided,

five gear set planes are provided for forward gears, of which two gear set planes are dedicated to the second transmission input shaft and the remaining gear set planes are dedicated to the first transmission input shaft,

the first, third, and fourth gear shifting devices are configured as synchronization devices and are disposed on the first transmission input shaft, and

the transmission output shaft is disposed axially behind the first transmission input shaft.

10. The hybrid drive according to claim 1, further comprising third and fourth gear shifting devices, wherein the first transmission input shaft connects to the internal combustion engine via a start-up clutch,

one gear set plane is provided for a reverse gear and one output constant is provided,

five gear set planes are provided for forward gears, of which two gear set planes of the forward gears are dedicated to the second transmission input shaft and the remaining gear set planes are dedicated to the first transmission input shaft,

two of the first, third, and fourth gear shifting devices are configured as synchronization devices and are disposed on the first transmission input shaft,

one of the first, third, and fourth gear shifting devices configured as a synchronization device are disposed on one of the layshaft and the second transmission input shaft, and

the transmission output shaft is disposed axially behind the transmission input shaft.

11. The hybrid drive according to claim 1, further comprising a third gear shifting device, wherein the first transmission input shaft connects to the internal combustion engine via a start-up clutch,

four gear set planes are provided for forward gears, of which a reverse gear is provided by reversely rotating a gear in one of the four gear set planes one output constant is provided, two gear set planes are dedicated to the second transmission input shaft and the remaining of the four gear set planes are dedicated to the first transmission input shaft,

first and third gear shifting devices are configured as synchronization devices and are disposed on the first transmission input shaft, and

the transmission output shaft is disposed axially behind the transmission input shaft.

12. The hybrid drive according to claim 1, further comprising a third gear shifting device, wherein the first transmission input shaft connects to the internal combustion engine via a start-up clutch,

five gear set planes are provided for forward gears, of which two gear set planes are dedicated to the second transmission input shaft and the remaining gear set planes are dedicated to the first transmission input shaft, and a reverse gear is provided reversely rotating a gear in one of the five gear set planes,

the first and third gear shifting devices are configured as synchronization devices and are disposed on the first transmission input shaft,

the transmission output shaft is disposed axially parallel to the first transmission input shaft, and

the layshaft serves as the transmission output shaft.

13. The hybrid drive according to claim 1, further comprising a third gear shifting device, wherein the first transmission shaft connects to the internal combustion engine via a start-up clutch,

the first electric motor and the internal combustion engine are disposed diametrically opposite one another,

five gear set planes are provided for forward gears, of which a reverse gear is provided by reversal of a gear of one of the five gear set planes, two gear set planes are dedicated to the second transmission input shaft, and the remaining gear set planes are dedicated to the first transmission input shaft,

the first and third gear shifting devices are configured as synchronization devices are disposed on the first transmission input shaft,

the transmission output shaft is disposed axially parallel to the first transmission input shaft, and

the layshaft serves as the transmission output shaft.

14. The hybrid drive according to claim 1, wherein the first transmission input shaft connects directly to the internal combustion engine,

three gear set planes are provided for forward gears, of which two gear set planes are dedicated to the second transmission input shaft and the remaining one gear set plane is dedicated to the first transmission input shaft, and a reverse gear is provided by reversely rotating a gear in one of the three gear set planes, and

the layshaft serves as the transmission output shaft.

15. The hybrid drive according to claim 1, wherein the first transmission input shaft is connected directly to the internal combustion engine,

on the end of the transmission facing the internal combustion engine a second electric motor is disposed on the first transmission input shaft,

three gear set planes are provided for forward gears, of which two gear set planes are dedicated to the second transmission input shaft and one gear set plane is dedicated to the first transmission input shaft, and a reverse gear is provided by reversely rotating a gear in one of the three gear set planes, and

the layshaft serves as the transmission output shaft.

16. The hybrid drive according to claim 1, wherein the first transmission input shaft is directly connected to the internal combustion engine,

at the end of the transmission diametrically opposite the internal combustion engine a second electric motor is disposed on the first transmission input shaft,

three gear set planes are provided for forward gears, of which two gear set planes are dedicated to the second transmission input shaft and one gear set plane is dedicated to the first transmission input shaft, and a reverse gear is provided by using an electric motor reversely rotating a gear in one of the three gear set planes, and

the layshaft serves as the transmission output shaft.

17. The hybrid drive according to claim 1, wherein the first transmission input shaft is directly connected to the internal combustion engine,

at the end of the transmission facing the internal combustion engine a second electric motor is disposed on the first transmission input shaft,

the first electric motor and the internal combustion engine are disposed diametrically opposite one another,

three gear set planes are provided for forward gears, of which two gear set planes are dedicated to the second transmission input shaft and one gear set plane is dedicated to the first transmission input shaft, and a reverse gear is provided by reversely rotating a gear in one of the three gear set planes, and

the layshaft serves as the transmission output shaft.

18. The hybrid drive according to claim 1, wherein an output constant is provided.

19. The hybrid drive according to claim 1, wherein at least one gear set plane is provided for a reverse gear.

20. The hybrid drive according to claim 1, wherein the first shifting device includes a direct gear.