Multi-mode hybrid powertrain with seven hybrid drive modes

Abstract

This invention belongs to the field of hybrid drive technology and relates to a multi-mode hybrid system with seven hybrid drive modes. The system includes three power sources, two planetary gear mechanisms, a fixed gear system, three clutches, a drive shaft, and an output shaft. Through the two planetary gear mechanisms and three clutches, this invention achieves seven hybrid drive modes: single-motor parallel hybrid drive mode, dual-motor parallel hybrid drive mode, series hybrid drive mode, input power split hybrid drive mode, output power split hybrid drive mode, single-speed decoupling hybrid drive mode, and dual-speed decoupling hybrid drive mode. Compared to existing multi-mode hybrid systems, this system features multiple hybrid drive modes, a simple structure, and excellent energy-saving potential across the entire vehicle operating range.

Description

Technical Field

[0001] This invention belongs to the field of hybrid drive technology and relates to a multi-mode hybrid system with seven hybrid drive modes. Background Technology

[0002] With the escalating global energy crisis and increasingly prominent environmental pollution problems, new energy vehicles have received widespread attention as an important means of energy conservation and emission reduction. Among them, hybrid power systems, as one of the core technologies of new energy vehicles, play a crucial role in reducing energy consumption and environmental pollution. By combining the advantages of traditional internal combustion engines and electric motors, hybrid power systems achieve efficient energy utilization and significant emission reduction.

[0003] Currently, common hybrid systems on the market mainly include single-mode hybrid systems such as series (range-extended), parallel, input power split, and output power split systems. These systems exhibit different energy consumption and power performance under different operating conditions, but all have certain limitations. For example, series hybrid systems have good energy consumption and power performance at low speeds and in urban conditions, but their energy consumption and power performance may be inferior to parallel systems at high speeds and long-distance driving. Therefore, a single hybrid mode is insufficient to meet the high-efficiency operation requirements of vehicles under all operating conditions. To improve the energy consumption and power performance of hybrid systems under all operating conditions, multi-mode hybrid systems have emerged. These systems provide multiple hybrid drive modes, which can flexibly switch operating modes according to different driving conditions and needs to achieve optimal energy utilization. However, existing multi-mode hybrid systems still have shortcomings at the configuration level, with relatively few hybrid drive modes, and the system's energy potential needs further improvement. Furthermore, existing centralized hybrid drive systems are often complex in structure and difficult to control, which not only increases the system's manufacturing cost and maintenance difficulty but also affects its energy efficiency under all vehicle operating conditions. Therefore, developing a multi-mode hybrid system that is both simple in structure and easy to control, while also exhibiting good energy efficiency under all vehicle operating conditions, has become an important direction for the current development of new energy vehicle technology.

[0004] In summary, in response to the shortcomings of existing hybrid power systems and market demands, this invention aims to provide a novel multi-mode hybrid power system. By optimizing the system configuration and adding hybrid drive modes, it improves the energy efficiency of the system under all operating conditions, while reducing system complexity and control difficulty, thus providing strong support for energy conservation, emission reduction, and sustainable development of new energy vehicles. Summary of the Invention

[0005] In view of this, the purpose of this invention is to provide a multi-mode hybrid power system with seven hybrid drive modes. Through two planetary gear mechanisms and three clutches, it realizes seven hybrid drive modes, including single-motor parallel hybrid drive mode, dual-motor parallel hybrid drive mode, series hybrid drive mode, input power split hybrid drive mode, output power split hybrid drive mode, single-speed decoupled hybrid drive mode, and dual-speed decoupled hybrid drive mode. Compared with existing multi-mode hybrid power systems, this system has the advantages of multiple hybrid drive modes, simple structure, and excellent energy-saving potential across the entire vehicle operating range.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] A multi-mode hybrid power system with seven hybrid drive modes includes a first power source, a second power source, a third power source, a first planetary gear mechanism, a second planetary gear mechanism, a fixed gear system, a clutch, a drive shaft, and an output shaft.

[0008] The first planetary gear mechanism includes a first sun gear, a first planetary gear, a first ring gear, and a first planet carrier. The first planetary gear is rotatably mounted on the first planet carrier, and the first sun gear is driven by meshing with the first ring gear through the first planetary gear. The second planetary gear mechanism includes a second sun gear, a second planetary gear, a second ring gear, and a second planet carrier. The second planetary gear is rotatably mounted on the second planet carrier, and the second sun gear is driven by meshing with the second ring gear through the second planetary gear.

[0009] The fixed gear system includes a first transmission gear, a second transmission gear, a third transmission gear, and a fourth transmission gear; the clutch includes a first clutch, a second clutch, and a third clutch; and the drive shaft includes a first drive shaft, a second drive shaft, a third drive shaft, a fourth drive shaft, and a fifth drive shaft.

[0010] The first power source output end is connected to the first drive shaft, the second power source output end is connected to the second drive shaft, and the third power source output end is connected to the third drive shaft;

[0011] The first gear ring is mounted on the first drive shaft, the second drive gear is mounted on the second drive shaft, the fourth drive gear is mounted on the third drive shaft, the first drive gear and the first planetary carrier are mounted on the fourth drive shaft, the first sun gear is mounted on the fifth drive shaft, and the second gear ring is mounted on the output shaft.

[0012] The first planetary carrier and the fifth drive shaft are detachably connected via a first clutch to establish engagement and disengagement between the first planetary carrier and the fifth drive shaft; the fifth drive shaft and the second sun gear are detachably connected via a second clutch to establish engagement and disengagement between the fifth drive shaft and the second sun gear; the second planetary carrier and the output shaft are detachably connected via a third clutch to establish engagement and disengagement between the second planetary carrier and the output shaft.

[0013] The third transmission gear is an external meshing gear mounted on the second planetary carrier. The first transmission gear meshes with the second transmission gear, and the third transmission gear meshes with the fourth transmission gear.

[0014] Furthermore, the first power source is an engine, the second power source is an electric motor, and the third power source is an electric motor.

[0015] Furthermore, different operating modes are achieved by controlling the switching of the working states of two planetary gear mechanisms and three clutches. These operating modes include single-motor parallel hybrid drive mode, dual-motor parallel hybrid drive mode, series hybrid drive mode, input power split hybrid drive mode, output power split hybrid drive mode, single-speed decoupled hybrid drive mode, and dual-speed decoupled hybrid drive mode.

[0016] Furthermore, the single-motor parallel hybrid drive mode is as follows: the first clutch, the second clutch and the third clutch are all engaged, and the first power source is working, the second power source is working, and the third power source is off;

[0017] Alternatively, the first power source may be active, the second power source may be off, and the third power source may be active.

[0018] Furthermore, the dual-motor parallel hybrid drive mode is as follows: the first clutch, the second clutch, and the third clutch are all engaged, the first power source is working, the second power source is working, and the third power source is working.

[0019] Furthermore, the series hybrid drive mode is as follows: the first clutch and the third clutch are engaged, the second clutch is disengaged, the first power source is working, the second power source is working, and the third power source is working.

[0020] Furthermore, the input power split hybrid drive mode is as follows: the first clutch is disengaged, the second clutch and the third clutch are engaged, and the first power source, the second power source, and the third power source are all in operation.

[0021] Furthermore, the output power split hybrid drive mode is as follows: the first clutch and the second clutch are engaged, the third clutch is disengaged, and the first power source, the second power source, and the third power source are all in operation.

[0022] Furthermore, the single-speed decoupled hybrid drive mode is as follows: the first clutch is disengaged, the second clutch and the third clutch are engaged, the first power source is working, the second power source is turned off, and the third power source is working.

[0023] Furthermore, the dual-speed decoupled hybrid drive mode is as follows: the first clutch and the third clutch are disengaged, the second clutch is engaged, the first power source is working, the second power source is working, and the third power source is working.

[0024] The beneficial effects of this invention are as follows:

[0025] 1. The multi-mode hybrid system with seven hybrid drive modes provided by the present invention can realize seven hybrid drive modes, including single-motor parallel hybrid drive mode, dual-motor parallel hybrid drive mode, series hybrid drive mode (range-extending mode), input power split hybrid drive mode, output power split hybrid drive mode, single-speed decoupling hybrid drive mode, and dual-speed decoupling hybrid drive mode, by only two planetary gear mechanisms and three clutches. Moreover, its structure is simple and easy to implement.

[0026] 2. In addition to realizing the above seven hybrid drive modes, the present invention can also realize pure engine drive mode, pure electric drive mode, regenerative braking mode, parking charging mode, parking standby mode and other working modes, which is conducive to improving the energy-saving potential of the vehicle in the entire working condition range.

[0027] Other advantages, objectives, and features of the invention will be set forth in part in the description which follows, and in part will be apparent to those skilled in the art from the following examination, or may be learned from practice of the invention. The objectives and other advantages of the invention can be realized and obtained through the following description. Attached Figure Description

[0028] To make the objectives, technical solutions, and advantages of the present invention clearer, the preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings, wherein:

[0029] Figure 1 This is a schematic diagram of a multi-mode hybrid power system with seven hybrid drive modes according to the present invention.

[0030] Reference numerals: First power source 1, Second power source 2, Third power source 3, First drive shaft 4, Second drive shaft 5, Third drive shaft 6, First drive gear 7, Second drive gear 8, Fourth drive shaft 9, First planetary carrier 10, First clutch 11, Fifth drive shaft 12, First ring gear 13, First sun gear 14, First planetary gear 15, Second clutch 16, Second planetary gear 17, Second ring gear 18, Second sun gear 19, Third drive gear 20, Second planetary carrier 21, Fourth drive gear 22, Third clutch 23, Output shaft 24. Detailed Implementation

[0031] The following specific examples illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and various details in this specification can be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of the present invention. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0032] The accompanying drawings are for illustrative purposes only and are schematic diagrams, not actual pictures. They should not be construed as limiting the invention. To better illustrate the embodiments of the invention, some parts in the drawings may be omitted, enlarged, or reduced, and do not represent the actual product dimensions. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings.

[0033] In the accompanying drawings of the embodiments of the present invention, the same or similar reference numerals correspond to the same or similar components. In the description of the present invention, it should be understood that if terms such as "upper," "lower," "left," "right," "front," and "rear" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, they are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the drawings are only for illustrative purposes and should not be construed as limiting the present invention. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0034] Please see Figure 1 It is a multi-mode hybrid power system with seven hybrid drive modes, including a first power source 1, a second power source 2, a third power source 3, a first planetary gear mechanism, a second planetary gear mechanism, a fixed gear system, a clutch, a drive shaft, and an output shaft 24.

[0035] The first planetary gear mechanism includes a first sun gear 14, a first planetary gear 15, a first ring gear 13, and a first planet carrier 10. The first planetary gear 15 is rotatably mounted on the first planet carrier 10, and the first sun gear 14 is driven by meshing with the first ring gear 13 through the first planetary gear 15.

[0036] The second planetary gear mechanism includes a second sun gear 19, a second planetary gear 17, a second ring gear 18, and a second planetary carrier 21. The second planetary gear 17 is rotatably mounted on the second planetary carrier 21, and the second sun gear 19 is driven by meshing with the second ring gear 18 through the second planetary gear 17.

[0037] The fixed gear system includes a first transmission gear 7, a second transmission gear 8, a third transmission gear 20, and a fourth transmission gear 22;

[0038] The clutch includes a first clutch 11, a second clutch 16, and a third clutch 23;

[0039] The drive shaft includes a first drive shaft 4, a second drive shaft 5, a third drive shaft 6, a fourth drive shaft 9, and a fifth drive shaft 12;

[0040] The first power source 1 is connected to the first drive shaft 4 at its output end, the second power source 2 is connected to the second drive shaft 5 at its output end, and the third power source 3 is connected to the third drive shaft 6 at its output end. A first gear ring 13 is fixedly mounted on the first drive shaft 4, a second drive gear 8 is fixedly mounted on the second drive shaft 5, a fourth drive gear 22 is fixedly mounted on the third drive shaft 6, a first drive gear 7 and a first planetary carrier 10 are fixedly mounted on the fourth drive shaft 9, a first sun gear 14 is fixedly mounted on the fifth drive shaft 12, and a second gear ring 18 is fixedly mounted on the output shaft 24. The first planetary carrier 10 and the fifth drive shaft 12 are detachably connected via a first clutch 11. Engagement and disengagement are established between the first planetary carrier 10 and the fifth drive shaft 12; the fifth drive shaft 12 and the second sun gear 19 are detachably connected via a second clutch 16 to establish engagement and disengagement between the fifth drive shaft 12 and the second sun gear 19; the second planetary carrier 21 and the output shaft 24 are detachably connected via a third clutch 23 to establish engagement and disengagement between the second planetary carrier 21 and the output shaft 24; the third drive gear 20 is an external meshing gear mounted on the second planetary carrier 21, the first drive gear 7 meshes with the second drive gear 8, and the third drive gear 20 meshes with the fourth drive gear 22.

[0041] In this embodiment, the first power source 1 is an engine, the second power source 2 is an electric motor, the third power source 3 is an electric motor, and the output shaft 24 is used to output power.

[0042] Preferably, the fourth drive shaft 9 and the fifth drive shaft 12 have their axes coincided to form a coaxial arrangement.

[0043] Furthermore, the axes of the first drive shaft 4, the fourth drive shaft 9, the fifth drive shaft 12, and the output shaft 24 coincide to form a coaxial arrangement, thereby improving power transmission efficiency, reducing power transmission loss, and lowering the difficulty of arrangement.

[0044] This invention utilizes two planetary gear mechanisms and three clutches to achieve seven hybrid drive modes, including single-motor parallel hybrid drive mode, dual-motor parallel hybrid drive mode, series hybrid drive mode (range-extending mode), input power split hybrid drive mode, output power split hybrid drive mode, single-speed decoupled hybrid drive mode, and dual-speed decoupled hybrid drive mode. Furthermore, this invention also includes a pure engine drive mode, a pure electric drive mode, a regenerative braking mode, a parking charging mode, and a parking standby mode.

[0045] The implementation methods of the above working modes are now explained in detail:

[0046] 1. Single-motor parallel hybrid drive mode: When the first clutch 11, the second clutch 16 and the third clutch 23 are all engaged, the first power source 1 works, the second power source 2 works and the third power source 3 is turned off; or the first power source 1 works, the second power source 2 is turned off and the third power source 3 works. At this time, the system realizes the single-motor parallel hybrid drive mode.

[0047] 2. Dual-motor parallel hybrid drive mode: When the first clutch 11, the second clutch 16 and the third clutch 23 are all engaged, the first power source 1 works, the second power source 2 works, and the third power source 3 works. At this time, the system realizes the dual-motor parallel hybrid drive mode.

[0048] 3. Series hybrid drive mode (range-extended mode): When the first clutch 11 and the third clutch 23 are engaged and the second clutch 16 is disengaged, the first power source 1, the second power source 2, and the third power source 3 are engaged, and the system realizes the series hybrid drive mode.

[0049] 4. Input power split hybrid drive mode: When the first clutch is disengaged 11, the second clutch 16 and the third clutch 23 are engaged, the first power source 1 works, the second power source 2 works, and the third power source 3 works. At this time, the system realizes the output power split hybrid drive mode.

[0050] 5. Output power split hybrid drive mode: When the first clutch 11 and the second clutch 16 are engaged and the third clutch 23 is disengaged, the first power source 1, the second power source 2, and the third power source 3 are working. At this time, the system realizes the output power split hybrid drive mode.

[0051] 6. Single-speed decoupled hybrid drive mode: When the first clutch 11 is disengaged and the second clutch 16 and the third clutch 23 are engaged, the first power source 1 is working, the second power source 2 is off, and the third power source 3 is working. At this time, the system realizes the single-speed decoupled hybrid drive mode.

[0052] 7. Dual-speed decoupled hybrid drive mode: When the first clutch 11 is disengaged from the third clutch 23 and the second clutch 16 is engaged, the first power source 1 works, the second power source 2 works, and the third power source 3 works. At this time, the system realizes the dual-speed decoupled hybrid drive mode.

[0053] 8. Pure engine drive mode: When the first clutch 11, the second clutch 16 and the third clutch 23 are all engaged, the first power source 1 is working, the second power source 2 is off, and the third power source 3 is off. At this time, the system realizes the pure engine drive mode.

[0054] 9. Pure electric drive mode: When the first clutch 11 is engaged or disengaged, the second clutch 116 is disengaged, the third clutch 23 is engaged, the first power source 1 is turned off, the second power source 2 is turned off, and the third power source 3 is activated, the system achieves pure electric drive mode.

[0055] 10. Regenerative Braking Mode: In modes 1-9 above, regenerative braking can be achieved by controlling power source 2 and power source 3 to recover braking energy during deceleration braking.

[0056] 11. Parking and charging mode: When the vehicle is parked, when the first clutch 11 is engaged, the second clutch 16 is disengaged, and the third clutch is engaged or disengaged, the first power source 1 works, the second power source 2 works, and the third power source 3 is turned off. At this time, the second power source 2 can act as a generator to charge the battery.

[0057] 12. Parking Standby Mode: When the vehicle is parked, the first power source 1 is turned off, the second power source 2 is turned off, and the third power source 3 is turned off. The battery supplies power to the system, and the system enters the parking standby mode.

[0058] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A multi-mode hybrid power system with seven hybrid drive modes, characterized in that: It includes a first power source, a second power source, a third power source, a first planetary gear mechanism, a second planetary gear mechanism, a fixed gear system, a clutch, a transmission shaft, and an output shaft; The first planetary gear mechanism includes a first sun gear, a first planetary gear, a first ring gear, and a first planet carrier. The first planetary gear is rotatably mounted on the first planet carrier, and the first sun gear is driven by meshing with the first ring gear through the first planetary gear. The second planetary gear mechanism includes a second sun gear, a second planetary gear, a second ring gear, and a second planet carrier. The second planetary gear is rotatably mounted on the second planet carrier, and the second sun gear is driven by meshing with the second ring gear through the second planetary gear. The fixed gear system includes a first transmission gear, a second transmission gear, a third transmission gear, and a fourth transmission gear; the clutch includes a first clutch, a second clutch, and a third clutch; and the drive shaft includes a first drive shaft, a second drive shaft, a third drive shaft, a fourth drive shaft, and a fifth drive shaft. The first power source output end is connected to the first drive shaft, the second power source output end is connected to the second drive shaft, and the third power source output end is connected to the third drive shaft; The first gear ring is fixedly mounted on the first drive shaft, the second drive gear is fixedly mounted on the second drive shaft, the fourth drive gear is fixedly mounted on the third drive shaft, the first drive gear and the first planetary carrier are fixedly mounted on the fourth drive shaft, the first sun gear is fixedly mounted on the fifth drive shaft, and the second gear ring is fixedly mounted on the output shaft. The first planetary carrier is detachably connected to the fifth drive shaft via a first clutch, the fifth drive shaft is detachably connected to the second sun gear via a second clutch, and the second planetary carrier is detachably connected to the output shaft via a third clutch. The third transmission gear is an external meshing gear mounted on the second planetary carrier. The first transmission gear meshes with the second transmission gear, and the third transmission gear meshes with the fourth transmission gear.

2. The multi-mode hybrid power system with seven hybrid drive modes according to claim 1, characterized in that: The first power source is an engine, the second power source is an electric motor, and the third power source is an electric motor.

3. The multi-mode hybrid system with seven hybrid drive modes according to claim 2, characterized in that: Different operating modes are achieved by controlling the switching of the working states of two planetary gear mechanisms and three clutches. The operating modes include single-motor parallel hybrid drive mode, dual-motor parallel hybrid drive mode, series hybrid drive mode, input power split hybrid drive mode, output power split hybrid drive mode, single-speed decoupled hybrid drive mode, and dual-speed decoupled hybrid drive mode.

4. The multi-mode hybrid power system with seven hybrid drive modes according to claim 3, characterized in that, The single-motor parallel hybrid drive mode is as follows: the first clutch, the second clutch and the third clutch are all engaged, and the first power source is working, the second power source is working and the third power source is off. Alternatively, the first power source may be active, the second power source may be off, and the third power source may be active.

5. The multi-mode hybrid power system with seven hybrid drive modes according to claim 3, characterized in that, The dual-motor parallel hybrid drive mode is as follows: the first clutch, the second clutch, and the third clutch are all engaged, the first power source is working, the second power source is working, and the third power source is working.

6. The multi-mode hybrid power system with seven hybrid drive modes according to claim 3, characterized in that, The series hybrid drive mode is as follows: the first clutch and the third clutch are engaged, the second clutch is disengaged, the first power source is working, the second power source is working, and the third power source is working.

7. The multi-mode hybrid power system with seven hybrid drive modes according to claim 3, characterized in that, The input power split hybrid drive mode is as follows: the first clutch is disengaged, the second clutch and the third clutch are engaged, and the first power source, the second power source, and the third power source are all in operation.

8. The multi-mode hybrid power system with seven hybrid drive modes according to claim 3, characterized in that, The output power split hybrid drive mode is as follows: the first clutch and the second clutch are engaged, the third clutch is disengaged, and the first power source, the second power source, and the third power source are all in operation.

9. The multi-mode hybrid power system with seven hybrid drive modes according to claim 3, characterized in that, The single-speed decoupled hybrid drive mode is as follows: the first clutch is disengaged, the second clutch and the third clutch are engaged, the first power source is working, the second power source is turned off, and the third power source is working.

10. The multi-mode hybrid power system with seven hybrid drive modes according to claim 3, characterized in that, The dual-speed decoupled hybrid drive mode is as follows: the first clutch and the third clutch are disengaged, the second clutch is engaged, the first power source is working, the second power source is working, and the third power source is working.

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