Hybrid drive of a motor vehicle

Patent metadata

Field	Value
Publication number	US-9764630-B2
Application number	US-201414909287-A
Country	US
Kind code	B2
Filing date	Jun 30, 2014
Priority date	Aug 1, 2013
Publication date	Sep 19, 2017
Grant date	Sep 19, 2017

Abstract

A hybrid drive of a motor vehicle has an internal combustion engine, an electric machine, an automated manual transmission with an input shaft and an output shaft, and a phase shifter gearbox in a planetary design with two input elements and one output element. A first input element of the gearbox is connected to a hollow shaft arranged in a coaxial manner around the output shaft, which is connectable to an idler gear of an axially adjacent spur gear stage of the manual transmission, and, for bypassing the gearbox, is connectable to the second input element or the output element of the gearbox. The second input element of the gearbox is permanently in drive connection with a rotor of the electric machine, and the output element of the gearbox is connected in a torque-proof manner to the output shaft.

First claim

The invention claimed is:

1. A hybrid drive ( 1 . 1 - 1 . 10 ) for a motor vehicle, comprising:
an internal combustion engine (VM) with a drive shaft ( 2 );
an electric machine (EM) with a rotor ( 3 ) operable as a motor and as a generator;
an automated manual transmission ( 4 . 1 , 4 . 2 , 4 . 3 , 4 . 4 , 4 . 5 , 4 . 6 ) carried out in a lay-shaft design with one input shaft (GE) and at least one output shaft (GA; GA 1 , GA 2 );
a phase shifter gearbox ( 5 . 1 , 5 . 2 ) carried out in a planetary design with a first input element ( 6 ), a second input element ( 7 ), and an output element ( 8 );
the input shaft (GE) of the manual transmission ( 4 . 1 - 4 . 6 ) connected to or connectable to the drive shaft ( 2 ) of the internal combustion engine (VM) through a controllable separating clutch (K 1 );
the input shaft (GE) able to be brought into drive connection with the output shaft (GA; GA 1 ; GA 2 ) through a plurality of selectively shiftable spur gear sets (Z 1 , Z 2 , Z 3 , Z 4 , Z 5 );
the drive shaft ( 2 ) of the internal combustion engine (VM) and the rotor ( 3 ) of the electric machine (EM) connectable to the output shaft (GA; GA 2 ) of the manual transmission ( 4 . 1 - 4 . 6 ) through the phase shifter gearbox ( 5 . 1 , 5 . 2 );
the phase shifter gearbox ( 5 . 1 , 5 . 2 ) arranged coaxially around a free end ( 9 ; 9 ′) of the output shaft (GA; GA 2 );
the first input element ( 6 ) of the phase shifter gearbox ( 5 . 1 , 5 . 2 ) connected in a torque-proof manner to a hollow shaft ( 10 ) arranged in a coaxial manner around the output shaft (GA; GA 2 );
wherein the hollow shaft is:
selectively connectable by a coupling shift element (K) to an idler gear ( 11 , 12 ) positioned directly axially adjacent one of the spur gear sets (Z 2 , Z 3 ) for coupling the internal combustion engine; and
connectable in a torque-proof manner to the second input element ( 7 ) or

the output element ( 8 ) of the phase shifter gearbox ( 5 . 1 , 5 . 2 ) for bypassing the phase shifter gearbox ( 5 . 1 , 5 . 2 ) through a bypass shift element (M, M′);
the second input element ( 7 ) of the phase shifter gearbox ( 5 . 1 , 5 . 2 ) is connectable to the output element ( 8 ) of the phase shifter gearbox ( 5 . 1 , 5 . 2 ) for bypassing the phase shifter gearbox ( 5 . 1 , 5 . 2 ) through the bypass shift element (M, M′);
the second input element ( 7 ) of the phase shifter gearbox ( 5 . 1 , 5 . 2 ) is permanently in drive connection with the rotor ( 3 ) of the electric machine (EM); and
the output element ( 8 ) of the phase shifter gearbox ( 5 . 1 , 5 . 2 ) is connected in a torque-proof manner to the output shaft (GA; GA 2 ).

2. The hybrid drive according to claim 1 , wherein for shifting a first gear step (E 1 ) effective between the rotor ( 3 ) of the electric machine (EM) and the output shaft (GA; GA 2 ), the first input element ( 6 ) of the phase shifter gearbox ( 5 . 1 , 5 . 2 ) or the hollow shaft ( 10 ) is fixed to a housing of the manual transmission through a locking shift element (L, L′).

3. The hybrid drive according to claim 1 , wherein the electric machine (EM) is arranged coaxially to the output shaft (GA; GA 2 ) of the manual transmission ( 4 . 1 - 4 . 6 ), the electric machine being arranged axially outside of and adjacent to the phase shifter gearbox ( 5 . 1 , 5 . 2 ), and the rotor ( 3 ) of the electric machine (EM) is directly connected in a torque-proof manner to the second input element ( 7 ) of the phase shifter gearbox ( 5 . 1 , 5 . 2 ).

4. The hybrid drive according to claim 1 , wherein the electric machine (EM) is arranged coaxially to the output shaft (GA; GA 2 ) of the manual transmission ( 4 . 1 - 4 . 6 ), the electric machine being arranged axially outside of and adjacent to the phase shifter gearbox ( 5 . 1 , 5 . 2 ), and the rotor ( 3 ) of the electric machine (EM) is in drive connection to the second input element ( 7 ) of the phase shifter gearbox ( 5 . 1 , 5 . 2 ) through a reduction stage (KEM′) arranged in an axial manner between the phase shifter gearbox ( 5 . 1 , 5 . 2 ) and the electric machine (EM), the reduction stage (KEM′) formed as a planetary gear set.

5. The hybrid drive according to claim 1 , wherein the electric machine (EM) is arranged in a manner axially parallel to the output shaft (GA; GA 2 ) of the manual transmission ( 4 . 1 - 4 . 6 ) radially adjacent to the phase shifter gearbox ( 5 . 1 , 5 . 2 ), and wherein the rotor ( 3 ) of the electric machine (EM) is in drive connection with the second input element ( 7 ) of the phase shifter gearbox ( 5 . 1 , 5 . 2 ) through a reduction stage (KEM) formed as a spur gear transmission stage.

6. The hybrid drive according to claim 1 , wherein the spur gear sets (Z 1 -Z 5 ) of the manual transmission ( 4 . 1 - 4 . 6 ) comprise fixed gears ( 14 - 18 , 19 , 20 ) arranged at the input shaft (GE) in a torque-proof manner.

7. The hybrid drive according to claim 6 , wherein a first gear (G 2 , G 3 ) of the manual transmission ( 4 . 2 , 4 . 4 ), a first of the spur gear sets of which (Z 2 , Z 3 ) is arranged directly axially adjacent to the phase shifter gearbox ( 5 . 1 , 5 . 2 ), is shiftable only through the coupling shift element (K) and the bypass shift element (M, M′).

8. The hybrid drive according to claim 7 , wherein a second gear (G 4 ) of the manual transmission ( 4 . 2 , 4 . 4 ), a second of the spur gear sets (Z 4 ) of which is arranged axially adjacent to the first spur gear stage, is shiftable through the associated gear shift element (D′) and the bypass shift element (M, M′), and that the relevant gear shift element (D′) is then combined with the coupling shift element (K) into one double shift element (S 2 ′).

9. The hybrid drive according to claim 1 , wherein the first input element ( 6 ), of the phage shifter gearbox ( 5 . 1 , 5 . 2 ) or the hollow shaft ( 10 ) are closable in a manner fixed to a housing of the manual transmission through a locking shift element (L, L′), and wherein each of the coupling shift element (K), the bypass shift element (M), and the locking shift element (L) is an unsynchronized claw clutch.

10. The hybrid drive according to claim 1 , wherein the bypass shift element (M′) is a friction clutch in order to carry out traction shifts as power shifts in an electric driving mode of the hybrid drive.

11. The hybrid drive according to claim 1 , wherein the first input element ( 6 ) of the phase shifter gearbox ( 5 . 1 , 5 . 2 ) or the hollow shaft ( 10 ) are closable in a manner fixed to a housing of the manual transmission through a locking shift element (L, L′), and wherein the bypass shift element (M′) and the locking shift element (L′) are formed as friction clutches in order to carry out traction shifts and thrust shifts as power shifts in an electric driving mode of the hybrid drive.

12. The hybrid drive according to claim 1 , wherein the phase shifter gearbox ( 5 . 1 ) is a simple planetary transmission (PG) with one sun gear (S), one planetary carrier (T) supporting a plurality of planetary gears (P) and one ring gear (R), wherein:
the first input element ( 6 ) of the phase shifter gearbox ( 5 . 1 , 5 . 2 ) or the hollow shift ( 10 ) are closable in a manner fixed to a housing of the manual transmission through a locking shift element (L, L′);
the sun gear (S) forms the first input element ( 6 ) connected in a torque-proof manner to the hollow shaft ( 10 );
the planetary carrier (T) forms the output element ( 8 ) connected in a torque-proof manner to the output shaft (GA; GA 2 ) of the manual transmission ( 4 . 1 - 4 . 6 ); and
the ring gear (R) forms the second input element ( 7 ) of the phase shifter gearbox ( 5 . 1 ) in drive conn

Assignees

• Zahnradfabrik Friedrichshafen
• ZF Frierichshafen AG

Inventors

• Kaltenbach Johannes
• Roske Michael
• Griesmeier Uwe

Classifications

• Y02T10/62

  Hybrid vehicles · CPC title

• B60W20/40

  Controlling the engagement or disengagement of prime movers, e.g. for transition between prime movers {(power-up or power-down of the driveline B60W30/192)} · CPC title

• F16H2200/0043

  the gear ratios comprising four forward speeds · CPC title

• B60K6/365 Primary

  with the gears having orbital motion · CPC title

• Y10S903/914

  Actuated, e.g. engaged or disengaged by electrical, hydraulic or mechanical means · CPC title