Hybrid drive system for a vehicle and vehicle

Abstract

The application provides a hybrid power drive system and a car, comprising an engine, a first clutch, a first gear, a first motor, a second gear, an intermediate shaft, a third gear, a fourth gear, a second clutch, a fifth gear and a second motor, wherein the engine has an engine output shaft; the first clutch is connected with the engine output shaft, and has a first clutch output shaft; the first gear is connected on the first clutch output shaft; the first motor has a first motor output shaft; the second gear is arranged on the first motor output shaft, and the second gear and the first gear are engaged; the third gear is engaged with the second gear, and is arranged on the intermediate shaft; the fourth gear is arranged on the intermediate shaft; the second clutch is arranged on the intermediate shaft and located between the third gear and the fourth gear; the fifth gear is fixedly connected with a differential of a front axle of the car, and is engaged with the fourth gear. The hybrid power drive system has simple mechanical structure and low cost.

Description

Technical Field

[0001] This application relates to the field of automotive technology, and more specifically to hybrid drive systems for automobiles and automobiles. Background Technology

[0002] Currently, hybrid vehicles occupy a significant share of the passenger vehicle market, and their sales are showing a continuous upward trend. Given that the hybrid system is a core component of these vehicles, its development is of paramount importance.

[0003] In hybrid powertrain configurations, the mainstream drive scheme typically employs two complete powertrains on the front and rear axles respectively, with a dual-motor structure on the front axle and an electric drive mechanism on the rear axle. However, this scheme is complex and costly. Utility Model Content

[0004] To at least partially solve the above-mentioned problems, according to a first aspect of this application, embodiments of this application provide a hybrid power drive system for an automobile, comprising: an engine, a first clutch, a first gear, a first motor, a second gear, an intermediate shaft, a third gear, a fourth gear, a second clutch, a fifth gear, and a second motor. The engine has an engine output shaft; the first clutch is connected to the engine output shaft, and the side of the first clutch away from the engine has a first clutch output shaft; the first gear is connected to the first clutch output shaft; the first motor has a first motor output shaft; the second gear is disposed on the first motor output shaft and meshes with the first gear; the intermediate shaft is arranged parallel to the engine output shaft, the clutch output shaft, and the first motor output shaft; the third gear meshes with the second gear and is disposed on the intermediate shaft; the fourth gear is disposed on the intermediate shaft; the second clutch is disposed on the intermediate shaft and located between the third gear and the fourth gear, for controlling the engagement and disengagement of the third gear and the fourth gear; the fifth gear is fixedly connected to the differential of the front axle of the automobile and meshes with the fourth gear; the second motor is used to drive the rear axle of the automobile.

[0005] In some embodiments, the hybrid drive system further includes a battery and a first motor controller, the first motor controller being electrically connected to the battery and also electrically connected to a first motor.

[0006] In some embodiments, the hybrid drive system further includes a second motor controller electrically connected to the battery and also electrically connected to a second motor.

[0007] In some embodiments, the hybrid drive system further includes a shock absorber connected to the engine output shaft, the shock absorber having a shock absorber output shaft connected to a first clutch.

[0008] In some embodiments, the hybrid drive system further includes a planetary reducer, the second motor has a second motor output shaft, the planetary reducer is drively connected to the second motor output shaft and the rear axle, and the second motor transmits power to the rear axle through the planetary reducer.

[0009] In some embodiments, the hybrid drive system further includes an inverter integrated into the second motor, which is electrically connected to the battery and the second motor.

[0010] In some embodiments, the hybrid drive system further includes an on-board charger integrated into the second motor and electrically connected to the battery.

[0011] In some embodiments, the hybrid drive system further includes a DC-DC converter integrated into the second motor and electrically connected to the battery.

[0012] In some embodiments, the hybrid drive system further includes a power distribution unit integrated into the second motor and electrically connected to the battery.

[0013] According to a second aspect of this application, embodiments of this application also provide an automobile including a hybrid power drive system provided in any embodiment of the first aspect of this application.

[0014] The embodiments of this application provide a hybrid drive system and automobile for vehicles. Through an optimized design of dual motors on the front and rear axles, the system can achieve multiple drive modes, including pure electric rear-wheel drive, pure electric four-wheel drive, range-extended drive, and hybrid power. This configuration has the advantages of simple mechanical structure and low cost; by adopting a dual-clutch architecture, the engine can be completely disengaged when not in operation, thereby achieving unloaded pure electric drive and further improving the efficiency of the power system; the reasonable arrangement of multiple gears enables the engine and the front wheels of the vehicle to rotate in the same direction, making the vehicle more stable during driving. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of a hybrid power drive system provided in an embodiment of this application;

[0017] Figure 2 This is an energy flow diagram of a hybrid drive system in pure electric rear-wheel drive mode provided in an embodiment of this application;

[0018] Figure 3 This is an energy flow diagram of a hybrid drive system in pure electric four-wheel drive mode provided in an embodiment of this application;

[0019] Figure 4 This is an energy flow diagram of a hybrid drive system in range-extended drive mode provided in an embodiment of this application;

[0020] Figure 5 This is an energy flow diagram of a hybrid drive system in hybrid mode provided in an embodiment of this application.

[0021] The attached figures are labeled as follows:

[0022] Engine 1; Engine output shaft 2; Shock absorber 3; Shock absorber output shaft 4; First clutch 5; First clutch output shaft 6; First gear 7; Second gear 8; First motor output shaft 9; First motor 10; Third gear 11; Intermediate shaft 12; Second clutch 13; Fourth gear 14; Fifth gear 15; Differential 16; First motor controller 17; Second motor controller 18; Second motor 19; Planetary reducer 20; Battery 21.

[0023] It should be understood that the dimensions of the various parts shown in the accompanying drawings are not drawn to actual scale. Furthermore, the same or similar reference numerals denote the same or similar components. Detailed Implementation

[0024] The preferred embodiments of this application will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are merely some, not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection claimed in this application.

[0025] The terms "first," "second," and similar words used in this application do not indicate any order, quantity, or importance, but are merely used to distinguish different parts. Words such as "including" or "contains" mean that the element preceding the word encompasses the element listed after it, and do not exclude the possibility of encompassing other elements as well. Terms such as "above," "below," "left," and "right" are used only to indicate relative positional relationships; when the absolute position of the described object changes, this relative positional relationship may also change accordingly.

[0026] like Figure 1As shown, to at least partially solve the above-mentioned problems, according to a first aspect of this application, an embodiment of this application provides a hybrid power drive system for an automobile, comprising: an engine 1, a first clutch 5, a first gear 7, a first motor 10, a second gear 8, an intermediate shaft 12, a third gear 11, a fourth gear 14, a second clutch 13, a fifth gear 15, and a second motor 19. The engine 1 has an engine output shaft 2; the first clutch 5 is connected to the engine output shaft 2, and the side of the first clutch 5 away from the engine 1 has a first clutch output shaft 6; the first gear 7 is connected to the first clutch output shaft 6; the first motor 10 has a first motor output shaft 9; the second... Gear 8 is mounted on the output shaft 9 of the first motor, and the second gear 8 meshes with the first gear 7. The intermediate shaft 12 is parallel to the engine output shaft 2, the clutch output shaft, and the first motor output shaft 9. The third gear 11 meshes with the second gear 8 and is mounted on the intermediate shaft 12. The fourth gear 14 is mounted on the intermediate shaft 12. The second clutch 13 is mounted on the intermediate shaft 12 and located between the third gear 11 and the fourth gear 14, used to control the engagement and disengagement of the third gear 11 and the fourth gear 14. The fifth gear 15 is fixedly connected to the differential 16 of the front axle of the vehicle and meshes with the fourth gear 14. The second motor 19 drives the rear axle of the vehicle. In this embodiment, the first gear 7, the second gear 8, the third gear 11, the fourth gear 14, and the fifth gear 15 are all reduction gears.

[0027] The embodiments of this application provide a hybrid drive system and automobile for vehicles. Through an optimized design of dual motors on the front and rear axles, the system can achieve multiple drive modes, including pure electric rear-wheel drive, pure electric four-wheel drive, range-extended drive, and hybrid power. This configuration has the advantages of simple mechanical structure and low cost; by adopting a dual-clutch architecture, the engine can be completely disengaged when not in operation, thereby achieving unloaded pure electric drive and further improving the efficiency of the power system; the reasonable arrangement of multiple gears enables the engine and the front wheels of the vehicle to rotate in the same direction, making the vehicle more stable during driving.

[0028] In some embodiments, the hybrid drive system further includes a battery 21 and a first motor controller 17, the first motor controller 17 being electrically connected to the battery 21 and also electrically connected to a first motor 10. In some embodiments, the hybrid drive system further includes a second motor controller 18, the second motor controller 18 being electrically connected to the battery 21 and also electrically connected to a second motor 19. In this embodiment, the first motor controller 17 and the second motor controller 18 control the first motor 10 and the second motor 19 respectively. Preferably, the first motor controller 17 and the second motor controller 18 can be integrated.

[0029] In some embodiments, the hybrid drive system further includes a shock absorber 3 connected to the engine output shaft 2, and the shock absorber 3 having a shock absorber output shaft 4 connected to a first clutch 5. In this embodiment, by providing the shock absorber 3, vibrations generated by the engine 1 can be absorbed, improving the driving experience.

[0030] In some embodiments, the hybrid drive system further includes a planetary reducer 20. The second motor 19 has a second motor 19 output shaft. The planetary reducer 20 is drive-connected to the second motor 19 output shaft and the rear axle. The second motor 19 transmits power to the rear axle through the planetary reducer 20. In this embodiment, the planetary reducer 20 can be coaxially arranged with the rotor shaft of the second motor 19. The rotor shaft of the second motor 19 can be a hollow structure. The left rear half-shaft can coaxially pass through the rotor shaft of the second motor 19 and be drive-connected to the planetary reducer 20. The right rear half-shaft does not pass through the rotor shaft of the second motor 19 and is directly drive-connected to the planetary reducer 20.

[0031] In some embodiments, the hybrid drive system further includes an inverter integrated into the second motor 19, which is electrically connected to the battery 21 and the second motor 19. In this embodiment, the inverter is used to convert the high-voltage DC power provided by the battery 21 into the three-phase AC power required by the motor. By integrating the inverter, cost savings, increased power density, reduced vehicle connectors, and saved vehicle layout space can be achieved.

[0032] In some embodiments, the hybrid drive system further includes an on-board charger integrated into the second motor 19 and electrically connected to the battery 21. In this embodiment, the on-board charger is used to convert external AC power into DC power to charge the battery 21. Through integrated installation, cost savings, increased power density, reduced vehicle connectors, and saved vehicle layout space can be achieved.

[0033] In some embodiments, the hybrid drive system further includes a DC-DC converter integrated into the second motor 19 and electrically connected to the battery 21. In this embodiment, the DC-DC converter is used for voltage level conversion. Its integrated design enables cost savings, increased power density, reduced vehicle connectors, and saved vehicle layout space.

[0034] In some embodiments, the hybrid drive system further includes a power distribution unit integrated into the second motor 19 and electrically connected to the battery 21. In this embodiment, the power distribution unit is used for high-voltage power distribution and safety protection. Its integrated design enables cost savings, increased power density, reduced vehicle connectors, and saved vehicle layout space.

[0035] In the above embodiments, the second motor 19 deeply integrates six key components, including a motor, an inverter, an on-board charger, a DC-DC converter, and a power distribution unit. This design not only achieves cost savings and increased power density, but also reduces the number of vehicle connectors, effectively saving space in the vehicle layout.

[0036] According to a second aspect of this application, embodiments of this application also provide an automobile including a hybrid power drive system provided in any embodiment of the first aspect of this application.

[0037] Next, we will combine Figures 2-5 The working principle of the hybrid drive system will be further explained.

[0038] Pure electric rear-wheel drive mode: such as Figure 2 As shown, when the vehicle has a sufficient battery and operates at low speed, the first clutch 5 and the second clutch 13 are disengaged, the engine 1 and the first motor 10 are not working, and power is output by the second motor 19. The power is output to the second motor 19 through the battery 21 and then transmitted to the rear axle wheels through the planetary reducer 20. In this mode, the energy source of the second motor 19 is the electrical energy stored in the vehicle battery 21.

[0039] Pure electric four-wheel drive mode: such as Figure 3 As shown, when the vehicle has a fully charged battery and operates at high speed, the first clutch 5 disengages, the engine 1 does not operate, the second clutch 13 engages, and the first motor 10 acts as the drive motor, simultaneously outputting power with the second motor 19, both powered by the battery 21. The power generated by the first motor 10 is output to the second gear 8, which is fixedly connected to it. The second gear 8 transmits power to the first gear 7, which meshes with it. The first gear 7 transmits power to the third gear 11, which meshes with it. Then, the power is sequentially transmitted to the intermediate shaft 12, the engaged second clutch 13, and the fourth gear 14. The fourth gear 14 transmits power to the fifth gear 15, which meshes with it. The fifth gear 15 transmits power to the differential 16 on the front axle and outputs it to the front axle wheels. Simultaneously, the power generated by the second motor 19 is output to the rear axle wheels after passing through the planetary reducer 20. In this mode, the engine 1 is completely disengaged, and the first motor 10 and the second motor 19 simultaneously output power to drive the vehicle, achieving pure electric four-wheel drive.

[0040] Range extender drive mode: such as Figure 4As shown, when battery 21 is low on power, the first clutch 5 is engaged and the second clutch 13 is disengaged. In this state, engine 1 operates to generate electricity, and the first motor 10 acts as a generator. Power from engine 1 is transmitted sequentially through shock absorber 3, shock absorber output shaft 4, first clutch 5, first gear 7, second gear 8, and then to the first motor 10, which is fixedly connected to it. The first motor 10 generates electricity. When the second motor 19 has a lower power demand, some electrical energy is stored in battery 21. The remaining electrical energy generated by the first motor 10 drives the second motor 19 to output power, which is then transmitted to the rear axle wheels via planetary reducer 20. When the second motor 19 has a higher power demand, all the electricity generated by the first motor 10 is used for rear-wheel drive. In this mode, engine 1 generates electricity through the first motor 10, and all the generated electricity drives the second motor 19 to output power.

[0041] Hybrid mode: such as Figure 5 As shown, when the vehicle has extremely high torque and speed requirements, the drive system of this invention can switch to hybrid mode, where the engine 1, the first motor 10, and the second motor 19 can simultaneously serve as power sources. At this time, the first clutch 5 and the second clutch 13 are engaged, and the engine 1 and the first motor 10 jointly output power. The first motor 10 is powered by the battery 21. The front driving force is output through the engine 1 and the first motor 10 to the first gear 7 connected to it. The first gear 7 transmits power to the third gear 11, which meshes with it, and then sequentially to the intermediate shaft 12, the engaged second clutch 13, and the fourth gear 14. The fourth gear 14 transmits power to the fifth gear 15, which meshes with it. The fifth gear 15 transmits power to the differential 16 on the front axle and outputs it to the wheels of the front axle. The second motor 19 is powered by the battery 21, and the power generated by the second motor 19 is transmitted to the rear axle wheels via the planetary reducer 20.

[0042] Based on the various embodiments of this application described above, in the absence of explicit denial or conflict, the technical features of one embodiment may be advantageously combined with one or more other embodiments.

[0043] While specific embodiments of this application have been described in detail by way of examples, those skilled in the art should understand that the above examples are for illustrative purposes only and are not intended to limit the scope of this application. Those skilled in the art should understand that modifications can be made to the above embodiments or equivalent substitutions can be made to some technical features without departing from the scope and spirit of this application. The scope of this application is defined by the appended claims.

Claims

1. A hybrid drive system for automobiles, characterized in that, include: An engine having an engine output shaft; A first clutch is connected to the engine output shaft, and the first clutch has a first clutch output shaft on the side away from the engine; The first gear is connected to the output shaft of the first clutch; A first motor, the first motor having a first motor output shaft; The second gear is mounted on the output shaft of the first motor and meshes with the first gear. An intermediate shaft is arranged parallel to the engine output shaft, the clutch output shaft, and the first motor output shaft. The third gear meshes with the second gear and is mounted on the intermediate shaft; The fourth gear is mounted on the intermediate shaft; The second clutch is mounted on the intermediate shaft and located between the third gear and the fourth gear, and is used to control the engagement and disengagement of the third gear and the fourth gear; The fifth gear is fixedly connected to the differential of the front axle of the vehicle, and the fifth gear meshes with the fourth gear; A second motor is used to drive the rear axle of the vehicle.

2. The hybrid drive system according to claim 1, characterized in that, Also includes: Battery; A first motor controller is electrically connected to the battery and also electrically connected to the first motor.

3. The hybrid drive system according to claim 2, characterized in that, Also includes: The second motor controller is electrically connected to the battery and is also electrically connected to the second motor.

4. The hybrid drive system according to claim 1, characterized in that, Also includes: A shock absorber, the shock absorber being connected to the engine output shaft, the shock absorber having a shock absorber output shaft, the shock absorber output shaft being connected to the first clutch.

5. The hybrid drive system according to claim 1, characterized in that, Also includes: The planetary reducer is provided, and the second motor has a second motor output shaft. The planetary reducer is connected to the second motor output shaft and the rear shaft, and the second motor transmits power to the rear shaft through the planetary reducer.

6. The hybrid drive system according to claim 2, characterized in that, Also includes: An inverter is integrated into the second motor and is electrically connected to the battery and the second motor.

7. The hybrid drive system according to claim 2, characterized in that, Also includes: An on-board charger is integrated into the second motor and is electrically connected to the battery.

8. The hybrid drive system according to claim 2, characterized in that, Also includes: A DC-DC converter is integrated into the second motor and is electrically connected to the battery.

9. The hybrid drive system according to claim 2, characterized in that, Also includes: A power distribution unit is integrated into the second motor and is electrically connected to the battery.

10. A car, characterized in that, Including the hybrid drive system as described in any one of claims 1-9.

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