Automobile drive system and automobile

Abstract

The present invention belongs to the technical field of automotive transmission, and provides an automotive drive system and an automobile. The automotive drive system includes a hybrid transmission device and an electric drive device; the hybrid transmission device includes an engine, a planetary gear set, a first motor, a first gear set and a first differential. The planetary gear set includes a sun gear, a ring gear, a planet carrier and planet gears. The engine is connected to the planet carrier, the first motor is connected to the sun gear, and the ring gear is connected to the first differential through the first gear set; the electric drive device includes a second motor, a second differential and a second gear set. The second motor is connected to the second differential through the second gear set; one of the first differential and the second differential is connected to the front wheels, and the other is connected to the rear wheels. In the automotive drive system of the present application, the power of the hybrid transmission device and the electric drive device can be transmitted to the front wheels and the rear wheels to achieve four-wheel drive.

Description

Technical Field

[0001] The present invention belongs to the technical field of automotive transmissions, and particularly relates to an automotive drive system and an automobile. Background Art

[0002] With the increasing emphasis on environmental protection and the country's energy strategy to reduce the demand for oil imports, the development of environmentally friendly and energy-saving automobiles has become the development direction of the automotive industry.

[0003] Among energy-saving automobiles and new energy automobiles, the technical bottlenecks of long charging time and short winter cruising range of pure electric vehicles have not been broken through. The cost of hydrogen fuel cell vehicles remains high, and the construction of hydrogen refueling infrastructure still takes time. Hybrid vehicles can achieve energy conservation and emission reduction even with the existing energy charging facilities, and are a relatively realistic and feasible solution at present. Therefore, major automobile manufacturers have successively launched or invested in the research and development of their respective hybrid vehicle models.

[0004] For a hybrid vehicle model to achieve energy conservation, it needs to have multiple working modes and switch to the working mode with the best economy according to actual conditions such as vehicle speed and vehicle torque demand. Therefore, in order to achieve the purpose of energy conservation, it is necessary to design a hybrid transmission device with multiple working modes.

[0005] An existing hybrid transmission device includes an engine, a first motor, a second motor, a planetary gear device, a clutch gear device, and a switch device. 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. 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. 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 is finally output to the front wheels or the rear wheels through a differential.

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

[0007] (1) Only one differential is provided, and the 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 transmission device has two motors and one planetary gear set, with a large size, which is 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 one differential is provided, and the power can only be output from one of the front wheels or the rear wheels, and the four-wheel drive cannot be achieved. A vehicle drive system and a vehicle are provided.

[0010] To solve the above technical problem, 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 set, a first motor, a first gear set and a first differential. The planetary gear set includes a sun gear, a ring gear, a planet carrier and planet gears. The engine is connected to the planet carrier, the first motor is connected to the sun gear, and the ring gear is connected to the first differential through the first gear set;

[0012] The electric drive device includes a second motor, a second differential and a second gear set. The second motor is connected to the second differential through the second 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 brake. One end of the brake is connected to the sun gear, and the other end of the brake is connected to a stationary component.

[0015] Optionally, the engine is connected to the planet carrier through an input shaft.

[0016] Optionally, the planetary gear set is located between the engine and the first motor, and the end of the input shaft away from the engine is coaxially spaced from the sun gear.

[0017] Optionally, the first motor is located between the engine and the planetary gear set, and the sun gear is sleeved on the input shaft.

[0018] Optionally, the hybrid power transmission device further includes a first clutch provided on the input shaft. The first clutch divides the input shaft into two coaxial segments. The engine is connected to the first end of the first clutch through one of the segments of the input shaft, and the second end of the first clutch is connected to the planet carrier through the other segment of the input shaft.

[0019] Optionally, the first gear set includes a first gear, an intermediate shaft, a second gear and a third gear. A planet carrier gear is provided on the planet carrier. The planet carrier gear meshes with the first gear. The first gear and the second gear are spaced apart from each other on the intermediate shaft. The third gear is provided on the first differential and meshes with the second gear.

[0020] Optionally, the second gear set includes a fourth gear, a fifth gear, a second shaft, a sixth gear, and a seventh gear. The fourth gear is connected to the other end of the first shaft. The fifth gear and the sixth gear are arranged on the second shaft at intervals. The seventh gear is arranged on the second differential and meshes with the sixth gear. The output shaft of the second motor is connected to the fourth gear.

[0021] Optionally, the electric drive device further includes a second clutch. The output shaft of the second motor is connected to the first end of the second clutch, and the second end of the second clutch is connected to the fourth gear through the first shaft.

[0022] In the vehicle drive system according to the embodiment of the present invention, one of the first differential of the hybrid transmission device and the second differential of the electric drive device is connected to the front wheels, and the other is connected to the rear wheels. In this way, the hybrid transmission device drives one of the front wheels and the rear wheels through the first differential, and the electric drive device drives the other of the front wheels and the rear wheels through the second differential. The power of the hybrid transmission device and the electric drive device can be transmitted to the front wheels and the rear wheels 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 transmission device only uses one motor (the first motor), which can reduce the size of the hybrid transmission device, make the structure of the hybrid transmission device simpler and more compact, and facilitate the vehicle layout.

[0023] In addition, the embodiment of the present invention further provides a vehicle, which includes the above vehicle drive system. Description of the Drawings

[0024] Figure 1 is a framework diagram of the hybrid transmission device of the vehicle drive system provided by the first embodiment of the present invention;

[0025] Figure 2 is a framework diagram of the electric drive device of the vehicle drive system provided by the first embodiment of the present invention;

[0026] Figure 3 is a lever diagram of the vehicle drive system provided by the first embodiment of the present invention in the two-wheel drive pure electric first gear mode;

[0027] Figure 4 is a lever diagram of the vehicle drive system provided by the first embodiment of the present invention in the two-wheel drive pure electric second gear mode;

[0028] Figure 5 is a lever diagram of the vehicle drive system provided by the first embodiment of the present invention in the two-wheel drive pure electric third gear mode;

[0029] Figure 6 is a lever diagram of the vehicle drive system provided by the first embodiment of the present invention in the four-wheel drive power split hybrid mode;

[0030] Figure 7 It is the lever diagram in the four-wheel drive parallel hybrid mode of the vehicle drive system provided by the first embodiment of the present invention;

[0031] Figure 8 It is the framework diagram of the hybrid drive device of the vehicle drive system provided by the second embodiment of the present invention;

[0032] Figure 9 It is the framework diagram of the hybrid drive device of the vehicle drive system provided by the third embodiment of the present invention;

[0033] Figure 10 It is the framework diagram of the hybrid drive device of the vehicle drive system provided by the fourth embodiment of the present invention;

[0034] Figure 11 It is the framework diagram of the hybrid drive device of the vehicle drive system provided by the fifth embodiment of the present invention

[0035] Figure 12 It is the framework diagram of the hybrid drive device of the vehicle drive system provided by the sixth embodiment of the present invention;

[0036] Figure 13 It is the framework diagram of the hybrid drive device of the vehicle drive system provided by the seventh embodiment of the present invention

[0037] Figure 14 It is the framework diagram of the hybrid drive device of the vehicle drive system provided by the eighth embodiment of the present invention;

[0038] Figure 15 It is the framework diagram of the electric drive device of the vehicle drive system provided by the ninth embodiment of the present invention.

[0039] The reference numerals in the accompanying drawings of the specification are as follows:

[0040] 100, hybrid drive device;

[0041] 1: Engine; 2: First motor; 3: Input shaft; 4: Planetary gear set; 5: First clutch; 6: Brake; 7: Stationary component; 8: Planet carrier; 801, Planet carrier gear; 9: Ring gear; 10: Sun gear; 11: Planet gear; 12: First differential; 13: First gear; 14: Intermediate shaft; 15: Second gear; 16: Third gear;

[0042] 200, electric drive device;

[0043] 17: Second motor; 18: Second clutch; 19: Output shaft of the second motor; 20: Fourth gear; 21: Fifth gear; 22: Second shaft; 23: Sixth gear; 24: Seventh gear; 25: Second differential; 26: First shaft. Detailed implementation

[0044] In order to make the technical problems, technical solutions and beneficial effects solved by the present invention more clearly understood, the present invention will be further described in detail below with reference to 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 used to limit the present invention.

[0045] First embodiment

[0046] As Figure 1 and Figure 2 shown, the vehicle drive system provided by the first embodiment of the present invention includes a hybrid transmission device and an electric drive device 200.

[0047] The hybrid transmission device includes an engine 1, a planetary gear set 4, a first motor 2, a first clutch 5, a brake 6, a first gear set and a first differential 12. The planetary gear set 4 includes a sun gear 10, a ring gear 9, a planet carrier 8 and planet gears 11. The engine 1 is connected to the planet carrier 8 through an input shaft 3. The first motor 2 is connected to the sun gear 10. The ring gear 9 is connected to the first differential 12 through the first gear set.

[0048] One end of the brake 6 is connected to the sun gear 10, and the other end of the brake 6 is connected to a stationary member 7.

[0049] The planet gears 11 are meshed between the ring gear 9 and the sun gear 10, and the planet gears 11 are rotatably supported on the planet carrier 8 through pins.

[0050] The engine 1 is connected to the planet carrier 8 through the input shaft 3. The planetary gear set 4 is located between the engine 1 and the first motor 2. One end of the input shaft 3 away from the engine 1 is coaxially spaced from the sun gear 10. Preferably, the first clutch 5 is provided on the first input shaft 3. The first clutch 5 divides the first input shaft 3 into two coaxial segments. The engine 1 is connected to the first end of the first clutch 5 through one of the segments of the first input shaft 3. The second end of the first clutch 5 is connected to the first planet carrier 8 through the other segment of the first input shaft 3.

[0051] The electric drive device 200 includes a second motor 17, a second differential 25 and a second gear set. The second motor 17 is connected to the second differential 25 through the second gear set; one of the first differential 12 and the second differential 25 is connected to the front wheels, and the other is connected to the rear wheels.

[0052] In this embodiment, the planetary gear set 4 is located between the engine 1 and the first motor 2, and the engine 1 and the first differential 12 are on the same side of the planetary gear set 4. In this way, the axial dimension of the shaft of the drive system can be shortened.

[0053] The first gear set includes a first gear 13, an intermediate shaft 14, a second gear 15 and a third gear 16. A carrier gear 801 is provided on the planet carrier 8. The carrier gear 801 meshes with the first gear 13. The first gear 13 and the second gear 15 are arranged on the intermediate shaft 14 at intervals. The third gear 16 is provided on the first differential 12 and meshes with the second gear 15.

[0054] The second gear set includes a fourth gear 20, a fifth gear 21, a first shaft 26, a second shaft 22, a sixth gear 23 and a seventh gear 24. The second end of the second clutch 18 is connected to one end of the first shaft 26. The fourth gear 20 is connected to the other end of the first shaft 26. The fifth gear 21 and the sixth gear 23 are arranged on the second shaft 22 at intervals. The seventh gear 24 is provided on the second differential 25 and meshes with the sixth gear 23.

[0055] The stationary component 7 is the transmission housing or the housing of the first motor 2. However, it can also be other components in the vehicle that are relatively stationary with respect to the vehicle body.

[0056] In the vehicle drive system according to the first embodiment of the present invention, one of the first differential 12 of the hybrid transmission and the second differential 25 of the electric drive device 200 is connected to the front wheels, and the other is connected to the rear wheels. In this way, the hybrid transmission drives one of the front wheels and the rear wheels through the first differential 12, and the electric drive device 200 drives the other of the front wheels and the rear wheels through the second differential 25. The power of the hybrid transmission and the electric drive device 200 can be transmitted to the front wheels and the rear wheels 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 transmission only uses one motor (the first motor 2), which can reduce the size of the hybrid transmission, make the structure of the hybrid transmission simpler and more compact, and facilitate the layout of the whole vehicle.

[0057] By controlling the engagement and disengagement of the first clutch 5 and the locking (braking) and opening (releasing the brake) of the brake 6, the vehicle drive system combined by the hybrid transmission and the electric drive device 200 can achieve 3 two-wheel drive pure electric working modes and 2 four-wheel drive hybrid working modes. As shown in Table 1 below:

[0058] Table 1 Working Modes of the Vehicle Drive System (First Embodiment)

[0059] Working mode Engine First clutch Brake Two-wheel drive pure electric first gear Not working Engaged Open Two-wheel drive pure electric second gear Not working Disengaged Open Two-wheel drive pure electric third gear Not working Disengaged Locked Four-wheel drive power split hybrid Working Engaged Open Four-wheel drive parallel hybrid Working Engaged Locked

[0060] The implementation methods of each working mode are as follows:

[0061] (1) Two-wheel drive pure electric first gear mode

[0062] Refer to Figure 3 . In this mode, the brake 6 of the hybrid transmission is opened, the first clutch 5 is engaged, and the engine 1 does not work. The torque of the second motor 17 is transmitted to the wheels (one of the front wheels and the rear wheels) through the second gear set and the second differential 25.

[0063] (2) Two-wheel drive pure electric second gear mode

[0064] Refer to Figure 4 . In this mode, the brake 6 of the hybrid transmission is opened, the first clutch 5 is disengaged, and the engine 1 does not work. The torque of the second motor 17 is transmitted to the wheels through the second gear set and the second differential 25.

[0065] (3) Two-wheel drive pure electric third gear mode

[0066] Refer to Figure 5 . The brake 6 of the hybrid transmission is locked, the first clutch 5 is disengaged, and the engine 1 does not work. The torque of the second motor 17 is transmitted to the wheels through the second gear set and the second differential 25.

[0067] (4) Four-wheel drive power split hybrid mode

[0068] Refer to Figure 6 . In this mode, the brake 6 is opened, the first clutch 5 is engaged, and the engine 1 works. A part of the power of the engine 1 drives the first motor 2 to generate electricity, and the other part of the power is transmitted to the wheels (one of the front wheels and the rear wheels) through the planetary gear set 4 and the first differential 12. The electricity generated by the first motor 2 can be supplied to the second motor 17, and if there is surplus, it can be charged into the power battery.

[0069] The torque of the second motor 17 is transmitted to the wheels (the other of the front wheels and the rear wheels) through the second gear set and the second differential 25. Thus, four-wheel drive is achieved.

[0070] (5) Four-wheel drive parallel hybrid mode

[0071] See Figure 7 , in this mode, the brake 6 is locked, the first clutch 5 is engaged, and the engine 1 is operating. The combined torque of the torques of the engine 1 and the first motor 2 is transmitted to a wheel (one of the front wheels and the rear wheels) through the planetary gear set 4 and the first differential 12.

[0072] The torque of the second motor 17 is transmitted to the other wheel (the other one of the front wheels and the rear wheels) through the second gear set and the second differential 25. In this way, four-wheel drive is achieved.

[0073] Second Embodiment

[0074] As Figure 8 shown, it is a framework diagram of the hybrid transmission device of the vehicle drive system provided by the second embodiment of the present invention. The difference from the first embodiment is that the first motor 2 is located between the engine 1 and the planetary gear set 4, and the sun gear 10 is sleeved on the input shaft 3 in an idle state. The sun gear 10 overlaps with the input shaft 3, which can reduce the axial dimension of the system.

[0075] Third Embodiment

[0076] As Figure 9 shown, it is a framework diagram of the hybrid transmission device of the vehicle drive system provided by the third embodiment of the present invention. The difference from the first embodiment is that the first clutch 5 is deleted from the input shaft 3. That is, the engine 1 is directly connected to the planet carrier 8 through the input shaft 3.

[0077] By controlling the locking (braking) and opening (releasing the brake) of the brake 6, the vehicle drive system obtained by combining the hybrid transmission device and the electric drive device 200 can achieve 1 two-wheel drive pure electric working mode and 2 four-wheel drive hybrid working modes. As shown in Table 2 below:

[0078] Table 2 Working Modes of the Vehicle Drive System (Third Embodiment)

[0079] Working mode Engine First clutch Brake Two-wheel drive pure electric first gear Not working Engaged Open Four-wheel drive power split hybrid Working Engaged Open Four-wheel drive parallel hybrid Working Engaged Locked

[0080] Fourth Embodiment

[0081] As Figure 10 shown, it is a framework diagram of the hybrid transmission device of the vehicle drive system provided by the fourth embodiment of the present invention. The difference from the third embodiment is that the first motor 2 is located between the engine 1 and the planetary gear set 4, and the sun gear 10 is sleeved on the input shaft 3 in an idle state. The sun gear 10 overlaps with the input shaft 3, which can reduce the axial dimension of the system.

[0082] Fifth Embodiment

[0083] As Figure 11As shown in the figure, it is a framework diagram of the hybrid transmission device of the vehicle drive system provided by the fifth embodiment of the present invention. The difference from the first embodiment is that the brake 6 is deleted.

[0084] By controlling the engagement and disengagement of the first clutch 5, the vehicle drive system combined by the hybrid transmission device and the electric drive device 200 can achieve 2 two-wheel drive pure electric working modes and 1 four-wheel drive hybrid working mode. As shown in Table 3 below:

[0085] Table 3 Working Modes of the Drive System (Fifth Embodiment)

[0086]

[0087]

[0088] Sixth Embodiment

[0089] As Figure 12 shown in the figure, it is a framework diagram of the hybrid transmission device of the vehicle drive system provided by the sixth embodiment of the present invention. The difference from the fifth embodiment is that the first motor 2 is located between the engine 1 and the planetary gear set 4, and the sun gear 10 is sleeved on the input shaft 3 in a floating manner. The sun gear 10 overlaps with the input shaft 3, which can reduce the axial dimension of the system.

[0090] Seventh Embodiment

[0091] As Figure 13 shown in the figure, it is a framework diagram of the hybrid transmission device of the vehicle drive system provided by the seventh embodiment of the present invention. The difference from the first embodiment is that the first clutch 5 and the brake 6 are deleted.

[0092] The vehicle drive system of the seventh embodiment, through the combination of the hybrid transmission device and the electric drive device 200, can achieve 1 two-wheel drive pure electric working mode and 1 four-wheel drive hybrid working mode, as shown in Table 4 below:

[0093] Table 4 Working Modes of the Vehicle Drive System (Seventh Embodiment)

[0094] Working mode Engine Two-wheel drive pure electric first gear Not working Four-wheel drive power split hybrid Working

[0095] Eighth Embodiment

[0096] As Figure 14 shown in the figure, it is a framework diagram of the hybrid transmission device of the vehicle drive system provided by the eighth embodiment of the present invention. The difference from the seventh embodiment is that the first motor 2 is located between the engine 1 and the planetary gear set 4, and the sun gear 10 is sleeved on the input shaft 3 in a floating manner. The sun gear 10 overlaps with the input shaft 3, which can reduce the axial dimension of the system.

[0097] Ninth Embodiment

[0098] As Figure 15 shown, it is a framework diagram of the electric drive device 200 of the vehicle drive system provided by the ninth embodiment of the present invention. The difference from the first embodiment is that a second clutch 18 and a first shaft 26 are added. The output shaft 19 of the second motor 17 is connected to the first end of the second clutch 18, and the second end of the second clutch 18 is connected to the fourth gear 20 through the first shaft 26.

[0099] In addition, an embodiment of the present invention also provides a vehicle, which includes the vehicle drive system of the above embodiment.

[0100] The above are only the preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An automotive drive system, characterized in that, it includes a hybrid drive device (100) and an electric drive device (200); the hybrid drive device (100) includes an engine (1), a planetary gear set (4), a first electric motor (2), a first gear set and a first differential (12), the planetary gear set (4) includes a sun gear (10), a ring gear (9), a planet carrier (8) and planet gears (11), the engine (1) is connected to the planet carrier (8), the first electric motor (2) is connected to the sun gear (10), and the ring gear (9) is connected to the first differential through the first gear set; the electric drive device (200) includes a second electric motor (17), a second differential (25) and a second gear set, and the second electric motor (17) is connected to the second differential (25) through the second gear set; one of the first differential (12) and the second differential (25) is connected to the front wheels, and the other is connected to the rear wheels; the hybrid drive device (100) further includes a brake (6), one end of the brake (6) is connected to the sun gear (10), and the other end of the brake (6) is connected to a stationary component (7); the engine (1) is connected to the planet carrier (8) through an input shaft (3); the hybrid drive device (100) further includes a first clutch (5) arranged on the input shaft (3), the first clutch (5) divides the input shaft (3) into two coaxial sections, the engine (1) is connected to the first end of the first clutch (5) through one section of the input shaft (3), and the second end of the first clutch (5) is connected to the planet carrier (8) through the other section of the input shaft (3); the working modes of the automotive drive system include a two-wheel drive pure electric first gear mode, a two-wheel drive pure electric second gear mode and a two-wheel drive pure electric third gear mode; in the two-wheel drive pure electric first gear mode, the brake (6) is opened, the first clutch (5) is engaged, and the engine (1) does not work; the torque of the second electric motor (17) is transmitted to the wheels through the second gear set and the second differential (25); in the two-wheel drive pure electric second gear mode, the brake (6) is opened, the first clutch (5) is disengaged, and the engine (1) does not work; the torque of the second electric motor (17) is transmitted to the wheels through the second gear set and the second differential (25); in the two-wheel drive pure electric third gear mode, the brake (6) is locked, the first clutch (5) is disengaged, and the engine (1) does not work; the torque of the second electric motor (17) is transmitted to the wheels through the second gear set and the second differential (25).

2. The automotive drive system according to claim 1, characterized in that, the planetary gear set (4) is located between the engine (1) and the first electric motor (2), and one end of the input shaft (3) away from the engine (1) is coaxially spaced from the sun gear (10).

3. The automotive drive system according to claim 2, characterized in that, the first electric motor (2) is located between the engine (1) and the planetary gear set (4), and the sun gear (10) is sleeved on the input shaft (3) loosely.

4. The vehicle drive system according to claim 1, wherein, the first gear set includes a first gear (13), an intermediate shaft (14), a second gear (15) and a third gear (16), a carrier gear (801) is provided on the carrier (8), the carrier gear (801) meshes with the first gear (13), the first gear (13) and the second gear (15) are arranged on the intermediate shaft (14) at intervals, the third gear (16) is provided on the first differential (12) and meshes with the second gear (15).

5. The vehicle drive system according to claim 1, wherein, the second gear set includes a fourth gear (20), a fifth gear (21), a second shaft (22), a sixth gear (23) and a seventh gear (24), the fourth gear (20) is connected to the other end of the first shaft (26), the fifth gear (21) and the sixth gear (23) are arranged on the second shaft (22) at intervals, the seventh gear (24) is provided on the second differential (25) and meshes with the sixth gear (23), and the output shaft (19) of the second motor (17) is connected to the fourth gear (20).

6. The vehicle drive system according to claim 5, wherein, the electric drive device (200) further includes a second clutch (18), the output shaft (19) of the second motor (17) is connected to the first end of the second clutch (18), and the second end of the second clutch (18) is connected to the fourth gear (20) through the first shaft (26).

7. A vehicle, wherein, it includes the vehicle drive system according to any one of claims 1 - 6.

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