Automobile drive system and automobile

Abstract

The present invention belongs to the field of automobile transmission technology, and provides an automobile drive system and an automobile, wherein the automobile drive system includes a hybrid power transmission device and an electric drive device, wherein the hybrid power transmission device includes an engine, a planetary gear, a first motor, a second clutch, a brake, a second gear set and a first differential, wherein the engine is connected to a ring gear, the first motor is connected to a ring gear, the planet carrier is connected to the first differential through the second gear set, one end of the brake is connected to a sun gear, the other end of the brake is connected to a stationary component, and the second clutch is connected between any two of the sun gear, the ring gear and the planet carrier; the electric drive device includes a second motor, a second differential and a third gear set, and the second motor is connected to the second differential through the third gear set. The automobile drive system of the present application can realize four-wheel drive.

Description

Technical Field

[0001] The invention belongs to the technical field of automobile transmission, and in particular relates to an automobile drive system and an automobile. Background Art

[0002] With the increasing demand for reducing oil imports for environmental protection and national energy strategies, the development of environmentally friendly and energy-saving vehicles has become the development direction of the automobile industry.

[0003] Among energy-saving cars and new energy vehicles, the technical bottlenecks of pure electric vehicles, such as long charging time and short driving range in winter, have not yet been broken through. The cost of hydrogen fuel cell vehicles remains high, and the construction of hydrogen refueling infrastructure will take time. Hybrid vehicles, on the other hand, can achieve energy conservation and emission reduction even with existing charging facilities, and are currently a more realistic and feasible solution. Therefore, major car companies have launched or invested in the development of their own hybrid models.

[0004] To achieve energy saving in hybrid vehicles, hybrid vehicles need to have multiple working modes and switch to the most economical working mode according to the actual conditions such as vehicle speed and vehicle torque demand. Therefore, in order to achieve the purpose of energy saving, it is necessary to design a hybrid transmission device with multiple working modes.

[0005] An existing hybrid power transmission device includes an engine, a first motor, a second motor, a planetary gear device, a clutch gear device and a switch device, wherein the engine and the first motor are both connected to the planetary gear device, and the clutch gear device is arranged between the engine and the first motor. The planetary gear device includes a first rotating element, a second rotating element and a third rotating element, wherein the third rotating element has a rotating axle, and the first motor is connected to the third rotating element or the rotating axle. The clutch gear device includes a first clutch and a second clutch, wherein the first clutch connects the engine and the rotating axle, and the second clutch connects the first rotating element and the third rotating element, or the second clutch connects the second rotating element and the third rotating element. The second motor is arranged in parallel with the first motor, and the second motor is connected to the output end, and the power final differential outputs to the front wheels or the rear wheels.

[0006] The above hybrid power transmission device has multiple working modes, but still has the following disadvantages:

[0007] (1) With only one differential, power can only be output from one of the front wheels or the rear wheels, and four-wheel drive cannot be achieved.

[0008] (2) The hybrid power transmission has two motors and a planetary gear, which is large in size and not conducive to the overall vehicle layout. Summary of the invention

[0009] The technical problem to be solved by the present invention is: for the existing hybrid power transmission device, only a differential is provided, and power can only be output from one of the front wheels or the rear wheels, and four-wheel drive cannot be achieved. A vehicle drive system and a vehicle are provided.

[0010] To solve the above technical problems, on the one hand, an embodiment of the present invention provides a vehicle drive system, including a hybrid power transmission device and an electric drive device;

[0011] The hybrid power transmission device includes an engine, a planetary gear, a first motor, a second clutch, a brake, a second gear set and a first differential, the planetary gear includes a sun gear, a ring gear, a planet carrier and a planetary gear, the engine is connected to the ring gear, the first motor is connected to the ring gear, the planet carrier is connected to the first differential through the second gear set, one end of the brake is connected to the sun gear, the other end of the brake is connected to a stationary component, and the second clutch is connected between any two of the sun gear, the ring gear and the planet carrier;

[0012] The electric drive device comprises a second motor, a second differential and a third gear set, wherein the second motor is connected to the second differential via the third gear set;

[0013] One of the first differential and the second differential is connected to the front wheels, and the other is connected to the rear wheels.

[0014] Optionally, the hybrid power transmission device further includes a first clutch, the engine is connected to a first end of the first clutch, and a second end of the first clutch is connected to the ring gear.

[0015] Optionally, the hybrid power transmission device further comprises a first gear set, and the first motor is connected to the ring gear via the first gear set;

[0016] The first gear set includes a first gear and a second gear meshing with each other, the second end of the first clutch is connected to the ring gear through a first shaft, the first gear is connected to the first shaft, and the second gear is connected to the output shaft of the first motor.

[0017] Optionally, the sun gear is sleeved on the first shaft, the output shaft of the engine, the first clutch, the first shaft, the sun gear and the first gear are coaxial, and the output shaft of the first motor is parallel and spaced from the first shaft.

[0018] Optionally, the second gear set includes a third gear, an intermediate shaft, a fourth gear and a fifth gear, a planetary carrier gear is provided on the planetary carrier, the planetary carrier gear is meshed with the third gear, the third gear and the fourth gear are arranged on the intermediate shaft at intervals, and the fifth gear is arranged on the first differential and meshed with the fourth gear.

[0019] Optionally, the electric drive device further includes a third clutch, the output shaft of the second motor is connected to a first end of the third clutch, and the second end of the third clutch is connected to the second differential via the third gear set.

[0020] Optionally, the third gear set includes a second shaft, a sixth gear, a seventh gear, a third shaft, an eighth gear and a ninth gear, the second end of the third clutch is connected to one end of the first shaft, the sixth gear is connected to the other end of the second shaft, the seventh gear and the eighth gear are arranged on the third shaft at intervals, and the ninth gear is arranged on the second differential and meshes with the eighth gear.

[0021] Optionally, the output shaft of the second motor, the third clutch and the second shaft are coaxial, and the second shaft is parallel and spaced apart from the third shaft.

[0022] Optionally, the stationary component is a transmission housing or a first motor housing.

[0023] According to the automobile drive system of the embodiment of the present invention, one of the first differential of the hybrid power transmission device and the second differential of the electric drive device is connected to the front wheel, and the other is connected to the rear wheel. In this way, the hybrid power transmission device drives one of the front wheel and the rear wheel through the first differential, and the electric drive device drives the other of the front wheel and the rear wheel through the second differential. The power of the hybrid power transmission device and the electric drive device can be transmitted to the front wheel and the rear wheel to realize four-wheel drive, and the four-wheel drive has multiple gears to adapt to various road conditions. In addition, compared with the prior art, the hybrid power transmission device only uses one motor (the first motor), which can reduce the size of the hybrid power transmission device, making the structure of the hybrid power transmission device simpler and more compact, and convenient for the layout of the whole vehicle.

[0024] In addition, an embodiment of the present invention further provides a car, which includes the above-mentioned car drive system. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 is a framework diagram of a hybrid power transmission device of an automobile drive system provided by a first embodiment of the present invention;

[0026] Figure 2 is a framework diagram of an electric drive device of an automobile drive system provided by a first embodiment of the present invention;

[0027] Figure 3 1 is a lever diagram of a pure electric 1st gear mode of a vehicle drive system provided by a first embodiment of the present invention;

[0028] Figure 4 is a lever diagram of a pure electric 2nd gear mode of a vehicle drive system provided by a first embodiment of the present invention;

[0029] Figure 5 : is a lever diagram of a pure electric 3-speed mode of a vehicle drive system provided by a first embodiment of the present invention;

[0030] Figure 6 is a lever diagram of a pure electric 4-speed mode of a vehicle drive system provided by a first embodiment of the present invention;

[0031] Figure 7 is a series hybrid mode lever diagram of an automobile drive system provided by a first embodiment of the present invention;

[0032] Figure 8 is a lever diagram of a parallel hybrid 1st gear mode of an automobile drive system provided by a first embodiment of the present invention;

[0033] Fig. 9 is a parallel hybrid 2-speed mode lever diagram of an automobile drive system provided by a first embodiment of the present invention;

[0034] Fig.10 is a framework diagram of a hybrid power transmission device of an automobile drive system provided by a second embodiment of the present invention;

[0035] Fig.11 It is a framework diagram of an electric drive device of an automobile drive system provided in a third embodiment of the present invention.

[0036] The reference numerals in the drawings of the specification are as follows:

[0037] 100. Hybrid power transmission;

[0038] 1: engine; 2: planetary gear; 3: first motor; 5: first clutch; 6: second clutch; 7: brake; 8: stationary part; 9: sun gear; 10: ring gear; 11: planet carrier; 1101, planet carrier gear; 12: planetary gear; 13: first shaft; 14: first gear; 15: second gear; 16: output shaft of first motor; 17: third gear; 18: intermediate shaft; 19: fourth gear; 20: fifth gear; 21: first differential;

[0039] 200. Electric drive device;

[0040] 4: second motor; 22: second shaft; 23: sixth gear; 24: seventh gear; 25: third shaft; 26: eighth gear; 27: ninth gear; 28: second differential; 29: third clutch; 30: output shaft of the second motor. DETAILED DESCRIPTION

[0041] In order to make the technical problems, technical solutions and beneficial effects solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0042] First embodiment

[0043] like Figure 1 and Figure 2 As shown, the automobile driving system provided by the first embodiment of the present invention includes a hybrid power transmission device 100 and an electric driving device 200 .

[0044] The hybrid power transmission device 100 includes an engine 1 , a planetary gear 2 , a first motor 3 , a first clutch 5 , a second clutch 6 , a brake 7 , a first gear set, a second gear set and a first differential 21 .

[0045] The planetary gear 2 includes a sun gear 9, a ring gear 10, a planet carrier 11 and planetary gears 12. The planetary gears 12 are meshed between the ring gear 10 and the sun gear 9. The planetary gears 12 are rotatably supported on the planet carrier 11 via a pin shaft.

[0046] The engine 1 is connected to the first end of the first clutch 5, the second end of the first clutch 5 is connected to the ring gear 10, the first motor 3 is connected to the ring gear 10 through the first gear set, the planetary carrier 11 is connected to the first differential 21 through the second gear set, one end of the brake 7 is connected to the sun gear 9, the other end of the brake 7 is connected to a stationary component 8, and the second clutch 6 is connected between any two of the sun gear 9, the ring gear 10 and the planetary carrier 11. Figure 1 In the embodiment, for example, the second clutch 6 is connected between the sun gear 9 and the ring gear 10 .

[0047] The electric drive device 200 includes a second motor 4, a second differential 28, a third clutch 29 and a third gear set, wherein an output shaft 30 of the second motor 4 is connected to a first end of the third clutch 29, and a second end of the third clutch 29 is connected to the second differential 28 via the third gear set. One of the first differential 21 and the second differential 28 is connected to the front wheels, and the other is connected to the rear wheels.

[0048] The first gear set includes a first gear 14 and a second gear 15 meshing with each other. The second end of the first clutch 5 is connected to the ring gear 10 via a first shaft 13. The first gear 14 is connected to the first shaft 13, and the second gear 15 is connected to the output shaft 16 of the first motor.

[0049] Preferably, the sun gear 9 is sleeved on the first shaft 13, the output shaft of the engine 1, the first clutch 5, the first shaft 13 and the first gear 14 are coaxially arranged, the sun gear (9) is sleeved on the first shaft (13), and the output shaft 16 of the first motor 3 is parallel and spaced from the first shaft 13. This makes the hybrid power transmission device 100 compact.

[0050] The second gear set includes a third gear 17, an intermediate shaft 18, a fourth gear 19 and a fifth gear 20. A planetary carrier gear 1101 is provided on the planetary carrier 11, and the planetary carrier gear 1101 is meshed with the third gear 17. The third gear 17 and the fourth gear 19 are arranged on the intermediate shaft 18 at intervals from each other. The fifth gear 20 is arranged on the first differential 21 and meshed with the fourth gear 19.

[0051] The third gear set includes a second shaft 22, a sixth gear 23, a seventh gear 24, a third shaft 25, an eighth gear 26 and a ninth gear 27. The second end of the third clutch 29 is connected to one end of the second shaft 22, the sixth gear 23 is connected to the other end of the second shaft 22, the seventh gear 24 and the eighth gear 26 are arranged on the third shaft 25 at intervals from each other, and the ninth gear 27 is arranged on the second differential 28 and meshes with the eighth gear 26.

[0052] Preferably, the output shaft of the second motor 4, the third clutch 29 and the second shaft 22 are coaxial, and the second shaft 22 is parallel and spaced apart from the third shaft 25, so that the electric drive device 200 has a compact structure.

[0053] The stationary component 8 is a transmission housing or a first motor housing. However, it can also be other components in the vehicle that remain relatively stationary with the vehicle body.

[0054] According to the automobile drive system of the first embodiment of the present invention, one of the first differential 21 of the hybrid power transmission device 100 and the second differential 28 of the electric drive device 200 is connected to the front wheel, and the other is connected to the rear wheel. In this way, the hybrid power transmission device 100 drives one of the front wheel and the rear wheel through the first differential 21, and the electric drive device 200 drives the other of the front wheel and the rear wheel through the second differential 28. The power of the hybrid power transmission device 100 and the electric drive device 200 can be transmitted to the front wheel and the rear wheel to achieve four-wheel drive, and the four-wheel drive has multiple gears to adapt to various road conditions. In addition, compared with the prior art, the hybrid power transmission device 100 only uses one motor (the first motor 3), which can reduce the size of the hybrid power transmission device 100, making the structure of the hybrid power transmission device 100 simpler and more compact, and convenient for the layout of the whole vehicle.

[0055] By controlling the engagement and disengagement of the first clutch 5 and the second clutch 6, and the locking (braking) and opening (releasing the brake) of the brake 7, the seven gears of the hybrid power transmission device 100 can be realized. See Table 1 below:

[0056] Table 1 Gear positions of hybrid power transmission device (first embodiment)

[0057]

[0058] The combination of the hybrid power transmission device 100 and the electric drive device 200 can realize 7 two-wheel drive working modes and 4 four-wheel drive working modes of the vehicle drive system, as shown in the following Table 2:

[0059] Table 2 Working mode of automobile drive system (first embodiment)

[0060]

[0061]

[0062] The implementation methods of each working mode are as follows:

[0063] (1) Pure electric 1st gear mode

[0064] See also Figure 3 In this mode, the brake 7 is locked, the first clutch 5 is disengaged, the second clutch 6 is disengaged, the engine 1 does not work, and the first motor 3 outputs the driving force through the first gear set, the ring gear 10, the planetary carrier 11, the second gear set and the first differential 21 to transmit it to the wheel (one of the front wheel and the rear wheel).

[0065] When the vehicle is in the two-wheel drive pure electric 1st gear mode, the third clutch 29 is disengaged and only the first motor 3 drives the wheels; when the vehicle is in the four-wheel drive pure electric 1st gear mode, the third clutch 29 is engaged, and the first motor 3 and the second motor 4 respectively drive their corresponding wheels (that is, the first motor 3 drives one of the front and rear wheels, and the second motor 4 drives the other one).

[0066] (2) Pure electric 2-speed mode

[0067] See also Figure 4 In this mode, the brake 7 is open, the first clutch 5 is disengaged, the second clutch 6 is engaged, the engine 1 is not working, and the first motor 3 outputs the driving force which is transmitted to the wheels through the first gear set, the planetary gear 2 (the planetary gear 2 rotates as a whole), the second gear set and the first differential 21.

[0068] When the vehicle is in the two-wheel drive pure electric 2nd gear mode, the third clutch 29 is disengaged and only the first motor 3 drives the wheels; when the vehicle is in the four-wheel drive pure electric 2nd gear mode, the third clutch 29 is engaged and the first motor 3 and the second motor 4 respectively drive their corresponding wheels.

[0069] (3) Pure electric 3-speed mode

[0070] See also Figure 5 In this mode, the brake 7 is open, the first clutch 5 is disengaged, the second clutch 6 is disengaged, the third clutch 29 is engaged, and the engine 1 does not work. The power for driving the wheels is only provided by the second motor 4, and the output driving force of the second motor 4 is transmitted to the wheels through the third gear set and the second differential 28.

[0071] That is, in this mode, there is only a two-wheel drive pure electric 3-speed mode.

[0072] (4) Pure electric 4-speed mode

[0073] See also Figure 6 In this mode, the brake 7 is open, the first clutch 5 is engaged, the second clutch 6 is disengaged, the third clutch 29 is engaged, and the engine 1 is not working. The power for driving the wheels is only provided by the second motor 4, and the output driving force of the second motor 4 is transmitted to the wheels through the third gear set and the second differential 28.

[0074] That is, in this mode, there is only a two-wheel drive pure electric 4-speed mode.

[0075] (5) Series Hybrid Mode

[0076] See also Figure 7 In this mode, the brake 7 is opened, the first clutch 5 is engaged, the second clutch 6 is disengaged, and the third clutch 29 is engaged. The engine 1 works and drives the first motor 3 to generate electricity. The power for driving the wheels is only provided by the second motor 4. The output driving force of the second motor 4 is transmitted to the wheels through the third gear set and the second differential 28.

[0077] That is, in this mode, there is only a two-wheel drive series hybrid mode.

[0078] (6) Parallel hybrid 1st gear mode

[0079] See also Figure 8 In this mode, the brake 7 is locked, the first clutch 5 is engaged, the second clutch 6 is disengaged, the engine 1 is working, and the power to drive the wheels is mainly provided by the engine 1, and the first motor 3 only assists when necessary. The output driving force of the engine 1 and the first motor 3 converges at the ring gear 10, and then is transmitted to the wheels through the planetary carrier 11, the second gear set and the first differential 21.

[0080] When the vehicle is in the two-wheel drive parallel hybrid 1st gear mode, the third clutch 29 is disengaged, and only the engine 1 and the first motor 3 drive the wheels; when the vehicle is in the four-wheel drive parallel hybrid 1st gear mode, the third clutch 29 is engaged, and the engine 1, the first motor 3 and the second motor 4 all drive the wheels.

[0081] (7) Parallel hybrid 2-speed mode

[0082] See also Fig. 9 In this mode, the brake 7 is open, the first clutch 5 is engaged, the second clutch 6 is engaged, the engine 1 is working, and the power to drive the wheels is mainly provided by the engine 1, and the first motor 3 only assists when necessary. The output driving force of the engine 1 and the first motor 3 converges at the ring gear 10, and then is transmitted to the wheels through the planetary gear 2 (the planetary gear 2 rotates as a whole), the second gear set and the first differential 21.

[0083] When the vehicle is in the two-wheel drive parallel hybrid 2nd gear mode, the third clutch 29 is disengaged, and only the engine 1 and the first motor 3 drive the wheels; when the vehicle is in the two-wheel drive parallel hybrid 2nd gear mode, the third clutch 29 is engaged, and the engine 1, the first motor 3 and the second motor 4 all drive the wheels.

[0084] Second embodiment

[0085] like Fig.10 , which is a framework diagram of a hybrid power transmission device 100 of a vehicle driving system provided by a second embodiment of the present invention. The difference between the hybrid power transmission device 100 and the first embodiment is that the first clutch 5 is omitted. That is, the engine 1 is directly connected to the first shaft 13.

[0086] By controlling the engagement and disengagement of the second clutch 6 and the locking (braking) and opening (releasing the brake) of the brake 7, the four gears of the hybrid power transmission device 100 can be realized. See Table 3 below:

[0087] Table 3 Gear positions of hybrid power transmission device (second embodiment)

[0088]

[0089] The combination of the hybrid power transmission device 100 and the electric drive device 200 can realize four two-wheel drive working modes and two four-wheel drive working modes of the vehicle drive system, as shown in the following Table 4:

[0090] Table 4 Working mode of automobile drive system (second embodiment)

[0091]

[0092]

[0093] Third embodiment

[0094] like Fig.11 , which is a framework diagram of an electric drive device 200 of a vehicle drive system provided by a third embodiment of the present invention. The difference between the third embodiment and the first embodiment is that the third clutch 29 is omitted. That is, the second motor 4 is directly connected to the second shaft 22, and the output shaft 30 of the second motor 4 is integrated with the second shaft 22.

[0095] The combination of the hybrid power transmission device 100 and the electric drive device 200 can realize three two-wheel drive working modes and four four-wheel drive working modes of the vehicle drive system, as shown in the following Table 5:

[0096] Table 5 Working mode of automobile drive system (third embodiment)

[0097] Working Mode Gear positions for hybrid transmission 2WD pure electric 3 gears Pure electric 3 gears 2WD pure electric 4 gears Pure electric 4 gears Two-wheel drive series hybrid Series Hybrid 4WD pure electric 1 gear Pure electric 1st gear 4WD pure electric 2-speed Pure electric 2-speed Four-wheel drive parallel hybrid 1 gear Parallel hybrid 1st gear Four-wheel drive parallel hybrid 2-speed Parallel hybrid 2 gear

[0098] Fourth embodiment

[0099] like Fig.11 , which is a framework diagram of an electric drive device 200 of a vehicle drive system provided in a fourth embodiment of the present invention. The difference between the fourth embodiment and the second embodiment is that the third clutch 29 is omitted. That is, the second motor 4 is directly connected to the second shaft 22, and the output shaft 30 of the second motor 4 is integrated with the second shaft 22.

[0100] The combination of the hybrid power transmission device 100 and the electric drive device 200 can realize two two-wheel drive working modes and two four-wheel drive working modes of the vehicle drive system, as shown in the following Table 6:

[0101] Table 6 Working mode of automobile drive system (fourth embodiment)

[0102] Working Mode Gear Positions of Hybrid Transmission 100 2WD pure electric 4 gears Pure electric 4 gears Two-wheel drive series hybrid Series Hybrid Four-wheel drive parallel hybrid 1 gear Parallel hybrid 1st gear Four-wheel drive parallel hybrid 2-speed Parallel hybrid 2 gear

[0103] In addition, an embodiment of the present invention further provides a vehicle, which includes the vehicle drive system of the above embodiment.

[0104] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A vehicle drive system, It is characterized in that It comprises a hybrid power transmission device (100) and an electric drive device (200); The hybrid power transmission device (100) comprises an engine (1), a planetary gear (2), a first motor (3), a second clutch (6), a brake (7), a second gear set and a first differential (21); the planetary gear (2) comprises a sun gear (9), a ring gear (10), a planet carrier (11) and a planetary gear (12); the engine (1) is connected to the ring gear (10); the first motor (3) is connected to the ring gear (10); the planet carrier (11) is connected to the first differential (21) via the second gear set; one end of the brake (7) is connected to the sun gear (9); the other end of the brake (7) is connected to a stationary component (8); and the second clutch (6) is connected between any two of the sun gear (9), the ring gear (10) and the planet carrier (11); The electric drive device (200) comprises a second motor (4), a second differential (28) and a third gear set, wherein the second motor (4) is connected to the second differential (28) via the third gear set; One of the first differential (21) and the second differential (28) is connected to the front wheel, and the other is connected to the rear wheel; The hybrid power transmission device (100) further comprises a first clutch (5), the engine (1) being connected to a first end of the first clutch (5), and a second end of the first clutch (5) being connected to the ring gear (10); The hybrid power transmission device (100) further comprises a first gear set, and the first motor (3) is connected to the ring gear (10) via the first gear set; The electric drive device (200) further comprises a third clutch (29), the output shaft (30) of the second motor (4) being connected to a first end of the third clutch (29), and the second end of the third clutch (29) being connected to the second differential (28) via the third gear set; The working modes of the vehicle drive system include a pure electric 1st gear mode, a pure electric 2nd gear mode, a pure electric 3rd gear mode and a pure electric 4th gear mode; in the pure electric 1st gear mode, the brake (7) is locked, the first clutch (5) is disengaged, the second clutch (6) is disengaged, the engine (1) does not work, and the driving force output by the first motor (3) is transmitted to the wheels through the first gear set, the ring gear (10), the planetary carrier (11), the second gear set and the first differential (21); when the whole vehicle is in the two-wheel drive pure electric 1st gear mode, the third clutch (29) is disengaged, and only the first motor (3) drives the wheels; when the whole vehicle is in the four-wheel drive pure electric 1st gear mode, the third clutch (29) is engaged, and the first motor (3) and the second motor (4) respectively drive their corresponding wheels; In the pure electric 2nd gear mode, the brake (7) is opened, the first clutch (5) is disengaged, the second clutch (6) is engaged, the engine (1) is not working, and the driving force output by the first motor (3) is transmitted to the wheels through the first gear set, the planetary gear (2), the second gear set and the first differential (21); when the whole vehicle is in the two-wheel drive pure electric 2nd gear mode, the third clutch (29) is disengaged, and only the first motor (3) drives the wheels; when the whole vehicle is in the four-wheel drive pure electric 2nd gear mode, the third clutch (29) is engaged, and the first motor (3) and the second motor (4) respectively drive their corresponding wheels; In the pure electric 3rd gear mode, the brake (7) is opened, the first clutch (5) is disengaged, the second clutch (6) is disengaged, the third clutch (29) is engaged, the engine (1) is not working, the power for driving the wheels is only provided by the second motor (4), and the output driving force of the second motor (4) is transmitted to the wheels through the third gear set and the second differential (28); In the pure electric 4th gear mode, the brake (7) is open, the first clutch (5) is engaged, the second clutch (6) is disengaged, and the third clutch (29) is engaged. The engine (1) does not work, and the power for driving the wheels is only provided by the second motor (4). The output driving force of the second motor (4) is transmitted to the wheels through the third gear set and the second differential (28).

2. The vehicle drive system according to claim 1, It is characterized in that The first gear set comprises a first gear (14) and a second gear (15) meshing with each other, the second end of the first clutch (5) is connected to the ring gear (10) via a first shaft (13), the first gear (14) is connected to the first shaft (13), and the second gear (15) is connected to an output shaft (16) of the first motor (3).

3. The vehicle drive system according to claim 2, It is characterized in that The sun gear (9) is sleeved on the first shaft (13); the output shaft of the engine (1), the first clutch (5), the first shaft (13) and the first gear (14) are coaxially arranged; the sun gear (9) is sleeved on the first shaft (13); and the output shaft (16) of the first motor (3) is parallel to and spaced from the first shaft (13).

4. The vehicle drive system according to claim 1, It is characterized in that The second gear set comprises a third gear (17), an intermediate shaft (18), a fourth gear (19) and a fifth gear (20); a planetary carrier gear (1101) is arranged on the planetary carrier (11); the planetary carrier gear (1101) is meshed with the third gear (17); the third gear (17) and the fourth gear (19) are arranged on the intermediate shaft (18) at intervals; the fifth gear (20) is arranged on the first differential (21) and is meshed with the fourth gear (19).

5. The vehicle drive system according to claim 1, It is characterized in that The third gear set comprises a second shaft (22), a sixth gear (23), a seventh gear (24), a third shaft (25), an eighth gear (26) and a ninth gear (27); the second end of the third clutch (29) is connected to one end of the first shaft (13); the sixth gear (23) is connected to the other end of the second shaft (22); the seventh gear (24) and the eighth gear (26) are arranged on the third shaft (25) at intervals; and the ninth gear (27) is arranged on the second differential (28) and meshes with the eighth gear (26).

6. The vehicle drive system according to claim 5, It is characterized in that The output shaft (30) of the second motor (4), the third clutch (29) and the second shaft (22) are coaxial, and the second shaft (22) and the third shaft (25) are parallel and spaced apart.

7. The vehicle drive system according to claim 1, It is characterized in that The stationary component (8) is a transmission housing or a first motor housing.

8. A car, It is characterized in that A vehicle drive system comprising any one of claims 1-7.

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