CN219257057U

CN219257057U - Series-parallel power system and vehicle

Info

Publication number: CN219257057U
Application number: CN202223233539.0U
Authority: CN
Inventors: 张喜州; 刘永明; 雷强; 苗芮
Original assignee: FAW Volkswagen Automotive Co Ltd
Current assignee: FAW Volkswagen Automotive Co Ltd
Priority date: 2022-12-01
Filing date: 2022-12-01
Publication date: 2023-06-27
Anticipated expiration: 2032-12-01

Abstract

The utility model discloses a series-parallel power system and a vehicle, comprising: an engine; the engine input shaft is in transmission connection with the engine; the planet carrier of the planet row is fixedly connected with the input shaft of the engine; the rotor of the first motor is fixedly connected with the gear ring of the planetary row; a brake connectable with the ring gear of the planetary gear set such that the brake regulates a ring gear rotational speed of the planetary gear set; the rotor of the second motor is in transmission connection with the sun gear of the planetary row; and the differential mechanism is in transmission connection with the sun gear of the planet row.

Description

Series-parallel power system and vehicle

Technical Field

The utility model relates to the technical field of vehicle-mounted power systems, in particular to a series-parallel power system and a vehicle.

Background

At present, a single planet row power split-flow type hybrid architecture is provided, an engine is connected with a planet carrier, a first motor is connected with a sun gear, a second motor is connected with a gear ring and a main reduction gear for outputting power, and the hybrid system is simple in structure and low in efficiency under a high-speed working condition; secondly, a double-planet row mixing scheme is adopted to realize power split mixing, but the structure is too complex and the cost is higher.

Disclosure of Invention

In order to solve at least one aspect of the above problems, the present utility model provides a hybrid power system, comprising: an engine; the engine input shaft is in transmission connection with the engine; the planet carrier of the planet row is fixedly connected with the input shaft of the engine; the rotor of the first motor is fixedly connected with the gear ring of the planetary row; the brake is connected with the gear ring of the planetary row, so that the brake adjusts the rotation speed of the gear ring of the planetary row; the rotor of the second motor is in transmission connection with the sun gear of the planetary row; and the differential mechanism is in transmission connection with the sun gear of the planet row.

Preferably, the engine input shaft is in driving connection with the engine through a damper.

Preferably, the planetary gear set further comprises a second motor output shaft, one end of the second motor output shaft is fixedly connected with a rotor of the second motor, the other end of the second motor output shaft is fixedly connected with a sun gear of the planetary gear set, and the differential mechanism is in transmission connection with the second motor output shaft.

Preferably, the second motor output shaft is fixedly connected with the first gear, so that the first gear and the second motor output shaft synchronously rotate, and the first gear is in transmission connection with the differential mechanism.

Preferably, the transmission device further comprises an intermediate shaft, a second gear, a third gear and a fourth gear, wherein the second gear and the third gear are coaxially arranged and fixedly connected with the intermediate shaft respectively, the second gear is meshed with the first gear, the third gear is meshed with the fourth gear, and the fourth gear is connected with a wheel transmission shaft through the differential mechanism.

In another aspect, there is provided a vehicle comprising a series-parallel power system as defined in any one of the preceding claims.

The series-parallel power system and the vehicle have the following beneficial effects: compared with the existing power split mixing, the scheme is structurally characterized in that the engine is in transmission connection with the planet carrier of the planet row through the input shaft of the transmitter, the first motor rotor is fixedly connected with the planet row gear ring, the planet row sun gear is respectively in transmission connection with the second motor rotor and the differential mechanism through the transmission mechanism, meanwhile, the brake is additionally arranged on the planet row gear ring, so that the vehicle can directly drive the vehicle to run at a fixed speed ratio when the brake is combined under a medium-high speed working condition, the efficiency reduction caused by power split under the medium-high speed working condition is avoided, the comprehensive efficiency of the system is improved, and the fuel consumption of the vehicle is reduced.

Drawings

For a better understanding of the above and other objects, features, advantages and functions of the present utility model, reference should be made to the embodiments illustrated in the drawings. Like reference numerals refer to like parts throughout the drawings. It will be appreciated by persons skilled in the art that the drawings are intended to schematically illustrate preferred embodiments of the utility model, and that the scope of the utility model is not limited in any way by the drawings, and that the various components are not drawn to scale.

Fig. 1 shows a block diagram of a series-parallel power system according to an embodiment of the present utility model.

Reference numerals:

1. an engine; 2. a torsional vibration damper; 3. an engine input shaft; 4. a first motor rotor; 5. a first motor stator; 6. a brake; 7. a planet carrier of a planet row; 8. a planet row gear ring; 9. a planet row sun gear; 10. a second motor output shaft; 11. a first gear; 12. a second motor rotor; 13. a second motor stator; 14: an intermediate shaft; 15: a second gear; 16. a third gear 3; 17. a fourth gear; 18. a differential; 19. and a transmission shaft.

Detailed Description

Exemplary embodiments of the present disclosure are described below in conjunction with the accompanying drawings, which include various details of the embodiments of the present disclosure to facilitate understanding, and should be considered as merely exemplary. Accordingly, one of ordinary skill in the art will recognize that various changes and modifications of the embodiments described herein can be made without departing from the scope and spirit of the present disclosure. Also, descriptions of well-known functions and constructions are omitted in the following description for clarity and conciseness.

The term "comprising" and variations thereof as used herein means open ended, i.e., "including but not limited to. The term "or" means "and/or" unless specifically stated otherwise. The term "based on" means "based at least in part on". The terms "one example embodiment" and "one embodiment" mean "at least one example embodiment. The term "another embodiment" means "at least one additional embodiment". The terms "first," "second," and the like, may refer to different or the same object. Other explicit and implicit definitions are also possible below.

To at least partially address one or more of the above problems, as well as other potential problems, one embodiment of the present disclosure proposes a hybrid powertrain system comprising: the device comprises an engine, an engine input shaft, a planetary row, a first motor, a brake, a second motor and a differential mechanism, wherein the engine input shaft is in transmission connection with the engine; the planet carrier 7 of the planet row is fixedly connected with the engine input shaft 3; the rotor of the first motor is fixedly connected with the gear ring of the planetary row; the brake is connected with the gear ring of the planetary gear, so that the brake adjusts the rotation speed of the gear ring of the planetary gear; the rotor of the second motor is in transmission connection with the sun gear of the planetary row; the differential mechanism is in transmission connection with the sun gear of the planet row.

Specifically, the engine 1 is in transmission connection with the engine input shaft 3, the planet row comprises a planet row planet carrier 7, a planet row gear ring 8 and a planet row sun gear 9, the first motor comprises a first motor rotor 4 and a first motor stator 5, the second motor comprises a second motor rotor 12 and a second motor stator 13, the first electronic rotor 4 is fixedly connected with the planet row gear ring 8, and the brake 6 is connected with the planet row gear ring 8 so as to realize braking of the brake 6 on the planet row gear ring 8. The second motor rotor 12 is fixedly connected with the central shaft of the planetary row sun gear 9, so that the second motor rotor 12 and the planetary row sun gear 9 synchronously rotate, the differential 18 is in transmission connection with the planetary row sun gear 9 through a transmission mechanism, the engine 1 drives the vehicle at a fixed speed ratio, the second motor rotor 12 is in transmission connection with the differential 18 through the transmission mechanism, and the differential 18 is connected with a vehicle transmission shaft 19. A brake 6 is added to the planetary gear set 8, and the brake 6 may be a multi-disc brake, a synchronizer brake, or a brake with other structures or braking functions. When the brake is combined, the planetary gear ring 8 and the first motor rotor 4 can be fixed, so that the planetary gear fixed speed ratio is realized, and the engine 1 can directly drive the vehicle to run under the medium-high speed working condition.

Pure electric drive mode: the engine 1 is in a stopped state and power is supplied by the second electric machine. The second motor rotor 12 outputs power, which is transmitted to a differential 18 via a transmission mechanism and then to wheels via a propeller shaft 19 to achieve pure electric drive.

Engine start mode: during the stationary or driving process of the vehicle, the engine 1 can be started by the first motor, at this time, the first motor rotor 4 outputs power, the power is output to the planetary gear ring 8 fixedly connected with the first motor rotor, the planetary gear ring 8 transmits the power to the planetary carrier 7, the planetary carrier 7 transmits the power to the engine input shaft 3 fixedly connected with the planetary carrier 7, and the engine input shaft 3 transmits the power to the engine 1, so that the engine 1 is driven to start.

Power splitting mode: the engine 1 outputs power, the power is transmitted to the planet carrier 7 of the planet row through the engine input shaft 3 connected with the power, a part of the power of the planet carrier 7 of the planet row is transmitted to the gear ring 8 of the planet row, the power transmitted to the gear ring 8 of the planet row is transmitted to the first motor rotor 4 fixedly connected with the power, the first motor generates electricity by utilizing the part of power, and the generated power of the first motor can be transmitted to the second motor or can be transmitted to a battery for energy storage; while a part of the power of the planet carrier 7 is transmitted to the planet sun gear 9, the power of the planet sun gear 9 is transmitted to the differential 18 through the transmission mechanism, and then to the wheels through the transmission shaft 19.

Engine direct drive mode: when the vehicle speed is high, the hybrid power configuration is changed to realize that the engine directly drives the vehicle to run, and in the mode, the brake 6 brakes the planet gear 8, namely the planet gear 8 cannot rotate, and the rotating speed is 0. At this time, the engine 1 outputs power to the engine input shaft 3, the engine input shaft 3 transmits power to the planet carrier 7, the planet carrier 7 transmits power to the planet sun gear 9 completely, the planet sun gear 9 transmits power to the differential 18 through the transmission mechanism and then to the wheels through the transmission shaft 19, and thus the engine 1 directly drives the vehicle to run.

In some embodiments, the engine is coupled to the engine via a damper.

Specifically, as shown in fig. 1, an engine 1 is connected to an engine input shaft 3 through a damper 2. In the engine start mode, the power output from the engine 1 is transmitted to the torsional damper 2, and the damper 2 transmits the power to the engine 1; in the power split mode, power is output by the engine 1, the power output by the engine 1 is transmitted to the torsional damper 2, and the power of the damper 2 is transmitted to the planet carrier 7 through the engine input shaft 3 connected with the damper 2; in the engine direct drive mode, the engine 1 outputs power to the torsional damper 2, which transmits power to the planet carrier 7 via the engine input shaft 3 fixedly connected thereto.

In some embodiments, the differential further comprises a second motor output shaft, one end of the second motor output shaft is fixedly connected with the rotor of the second motor, the other end of the second motor output shaft is fixedly connected with the sun gear of the planetary row, and the differential is in transmission connection with the second motor output shaft.

Specifically, as shown in fig. 1, in the pure electric mode, the engine 1 is in a stopped state, and power is supplied from the second electric motor. The second motor rotor 12 outputs power, and the power is output to the differential 18 through the second motor output shaft 10 by the transmission mechanism; in the power split mode, the power output by the engine 1 is transmitted to the torsional damper 2, the damper 2 transmits power to the planet carrier 7 through the engine input shaft 3 connected with the damper 2, the planet carrier 7 transmits part of the power to the planet sun gear 9, and the planet sun gear 9 outputs power to the differential 18 through the transmission mechanism connected with the second motor output shaft 10; in the engine direct drive mode, the engine 1 outputs power to the torsional damper 2, the damper transmits the power to the planet carrier 7 through the engine input shaft 3 fixedly connected with the torsional damper, the planet carrier 7 completely transmits the power to the planet sun gear 9, and the planet sun gear 9 outputs the power to the differential 18 through the second output shaft 10 fixedly connected with the transmission mechanism.

In some embodiments, the fixed connection of the second motor output shaft to the first gear causes the first gear to rotate in synchronization with the second motor output shaft, the first gear being in driving connection with the differential.

Specifically, as shown in fig. 1, the first gear 11 and the planet row sun gear 9 are coaxial, and the first gear 11 is fixedly connected with the second motor output shaft 10. The first gear 11 is in driving connection with a differential 18 via a transmission mechanism. In the electric-only drive mode, the engine 1 is in a stopped state, and power is supplied from the second electric machine. The second motor rotor 12 outputs power, the power is transmitted to a first gear 11 fixed on the shaft through a second motor output shaft 10, the first gear 11 transmits the power to a differential 18 through a transmission mechanism and then to wheels through a transmission shaft 19, so that pure electric driving is realized; in the power split mode, the engine 1 outputs power, the power output by the engine 1 is transmitted to the torsional vibration damper 2, the power of the torsional vibration damper 2 is transmitted to the planet carrier 7 through the engine input shaft 3 connected with the torsional vibration damper 2, part of the power of the planet carrier 7 is transmitted to the planet gear ring 8, the power transmitted to the planet gear ring 8 is transmitted to the first motor rotor 4 fixedly connected with the planet gear ring 8, the first motor generates power by utilizing the part of the power, and the generated power of the first motor can be transmitted to the second motor or can be transmitted to a battery for energy storage; meanwhile, part of the power of the planet carrier 7 of the planet row is transmitted to the sun gear 9 of the planet row, the power of the sun gear 9 of the planet row is transmitted to the first gear 11 through the output shaft 10 of the second motor, and the first gear 11 transmits the power to the differential 18 through the transmission mechanism and then to the wheels through the transmission shaft 19; in the engine direct-drive mode, when the vehicle speed is high, the hybrid power configuration is changed to realize that the engine directly drives the vehicle to run, and in the mode, the brake 6 brakes the planet gear ring 8, namely the planet gear ring 8 cannot rotate, and the rotating speed is 0. At this time, the engine 1 outputs power to the torsional damper 2, the damper transmits power to the planet carrier 7 through the engine input shaft 3 fixedly connected thereto, the planet carrier 7 completely transmits power to the planet sun gear 9, the planet sun gear 9 transmits power to the first gear 11 through the second output shaft 10 fixedly connected thereto, the first gear 11 transmits power to the differential 18 through the transmission mechanism, and then transmits power to the wheels through the transmission shaft 19, thereby realizing that the engine 1 directly drives the vehicle to travel.

In some embodiments, as shown in fig. 1, the device further comprises an intermediate shaft 14, a second gear 15, a third gear 16 and a fourth gear 17, wherein the second gear 15 and the third gear 16 are coaxially arranged and fixedly connected with the intermediate shaft 14 respectively, the second gear 15 is meshed with the first gear 11, the third gear 16 is meshed with the fourth gear 17, and the fourth gear 17 is connected with a wheel transmission shaft 19 through a differential 18.

Pure electric drive mode: in this mode the engine 1 is in a stopped state and power is supplied by the second electric machine. The second motor rotor 12 outputs power, the power is transmitted to the first gear 11 fixed on the shaft through the second motor output shaft 10, the first gear 11 transmits the power to the second gear 15, the second gear 15 is fixedly connected with the intermediate shaft 14, the power is transmitted to the third gear 16 through the intermediate shaft 14, the third gear 16 transmits the power to the fourth gear 17 meshed with the third gear 16, the fourth gear 17 transmits the power to the differential 18, and then the power is transmitted to the wheels through the transmission shaft 19, so that pure electric driving is realized.

Engine start mode: during the stationary or driving process of the vehicle, the engine 1 can be started through the first motor, at this time, the first motor rotor 4 outputs power, the power is output to the planetary gear ring 8 fixedly connected with the first motor rotor, the planetary gear ring 8 transmits the power to the planetary gear carrier 7, the planetary gear carrier 7 transmits the power to the engine input shaft 3 fixedly connected with the planetary gear carrier 7, the engine input shaft 3 transmits the power to the torsional damper 2, and the damper 2 transmits the power to the engine 1, so that the engine 1 is driven to start.

Power splitting mode: in the power split mode, the engine 1 outputs power, the power output by the engine 1 is transmitted to the torsional vibration damper 2, the torsional vibration damper 2 transmits power to the planet carrier 7 through the engine input shaft 3 connected with the torsional vibration damper, the planet carrier 7 transmits part of the power to the planet gear ring 8, the power transmitted to the planet gear ring 8 is transmitted to the first motor rotor 4 fixedly connected with the planet gear ring 8, the first motor generates power by utilizing the part of the power, and the generated power of the first motor can be transmitted to the second motor or can be transmitted to a battery for energy storage; meanwhile, part of the power of the planet carrier 7 of the planet row is transmitted to the sun gear 9 of the planet row, the power of the sun gear 9 of the planet row is transmitted to the first gear 11 through the output shaft 10 of the second motor, the first gear 11 transmits the power to the second gear 15, the second gear 15 is fixedly connected with the intermediate shaft 14, the power is transmitted to the third gear 16 through the intermediate shaft 14, the third gear 16 transmits the power to the fourth gear 17 meshed with the third gear 16, the fourth gear 17 transmits the power to the differential 18, and then the power is transmitted to wheels through the transmission shaft 19.

Engine direct drive mode: when the vehicle speed is high, the hybrid power configuration is changed to realize that the engine directly drives the vehicle to run, and in the mode, the brake 6 brakes the planet gear 8, namely the planet gear 8 cannot rotate, and the rotating speed is 0. At this time, the engine 1 outputs power to the torsional damper 2, the damper transmits power to the planet carrier 7 through the engine input shaft 3 fixedly connected thereto, the planet carrier 7 transmits power to the planet sun gear 9 entirely, the planet sun gear 9 transmits power to the first gear 11 through the second output shaft 10 fixedly connected thereto, the first gear 11 transmits power to the second gear 15, the second gear 15 is fixedly connected with the intermediate shaft 14, power is transmitted to the third gear 16 through the intermediate shaft, the third gear 16 transmits power to the fourth gear 17 engaged therewith, the fourth gear 17 transmits power to the differential 18, and then the transmission shaft 19 transmits power to the wheels, thereby realizing that the engine 1 directly drives the vehicle to travel.

In another aspect, a vehicle is provided that includes any of the series-parallel power systems described above.

The foregoing description of the embodiments of the present disclosure has been presented for purposes of illustration and description, and is not intended to be exhaustive or limited to the embodiments disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the various embodiments described. The terminology used herein was chosen in order to best explain the principles of the embodiments, the practical application, or the technical improvement in the marketplace, or to enable others of ordinary skill in the art to understand the disclosure.

Claims

1. A hybrid powertrain comprising:

an engine;

the engine input shaft is in transmission connection with the engine;

the planet carrier of the planet row is fixedly connected with the input shaft of the engine;

the rotor of the first motor is fixedly connected with the gear ring of the planetary row;

the brake is connected with the gear ring of the planetary row, so that the brake adjusts the rotation speed of the gear ring of the planetary row;

the rotor of the second motor is in transmission connection with the sun gear of the planetary row;

and the differential mechanism is in transmission connection with the sun gear of the planet row.

2. The system of claim 1, further comprising a shock absorber, the engine input shaft being drivingly connected to the engine through the shock absorber.

3. The system of claim 2, further comprising a second motor output shaft, one end of the second motor output shaft being fixedly connected to the rotor of the second motor, the other end of the second motor output shaft being fixedly connected to the sun gear of the planetary row, the differential being in driving connection with the second motor output shaft.

4. The system of claim 3, wherein the fixed connection of the second motor output shaft to the first gear causes the first gear to rotate in synchronization with the second motor output shaft, the first gear in driving connection with the differential.

5. The system of claim 4, further comprising an intermediate shaft and a second gear, a third gear and a fourth gear, wherein the second gear and the third gear are coaxially disposed and fixedly connected to the intermediate shaft, respectively, the second gear is in mesh with the first gear, the third gear is in mesh with the fourth gear, and the fourth gear is connected to a wheel drive shaft through the differential.

6. A vehicle comprising a series-parallel power system according to any one of claims 1-5.