Stepless speed change power system and vehicle

Abstract

The utility model discloses an infinitely variable speed power system and a vehicle. The infinitely variable speed power system comprises an engine; a first motor; the first planet row comprises a first gear ring, a first sun gear and a first planet carrier; the second planet row comprises a second gear ring, a second sun gear and a second planet carrier, the second sun gear is connected with the first planet carrier, the first planet carrier is connected with a first motor input shaft, the first sun gear is connected with an engine input shaft, and the second gear ring is connected with an output shaft. And the first sun gear is selectively connected with the second planet carrier and / or the first gear ring is selectively connected with the second gear ring. An ECVT forward gear mode and a reverse gear mode can be achieved, and the structure is simple.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicles, in particular to a continuously variable speed power system and a vehicle. Background Art

[0002] In the current market, hybrid power is a realistic option for energy conservation and has a large market space. With the improvement of environmental protection concepts, more consumers will accept these hybrid vehicles that are fuel-efficient, smooth, quiet, and have power comparable to gasoline vehicles.

[0003] In related technologies, the ECVT (full name electronic continuously variable transmission) architecture of new energy hybrid products can generally only achieve forward gears. The specific architecture is generally composed of two architectures: parallel gears plus differentials or planetary gears plus differentials. There is a lack of an architecture solution in which ECVT can achieve the reverse gear function. Utility Model Content

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention proposes a continuously variable transmission power system that can realize an ECVT forward gear mode and an ECVT reverse gear mode, and has a simple and compact structure.

[0005] The utility model further provides a vehicle.

[0006] According to the continuously variable transmission power system of the first aspect embodiment of the present invention, it includes: an engine; a first motor; a first planetary gear row, including a first ring gear, a first sun gear and a first planetary carrier; a second planetary gear row, including a second ring gear, a second sun gear and a second planetary carrier, the second sun gear is connected to the first planetary carrier, the first planetary carrier is connected to the first motor input shaft, the first sun gear is connected to the engine input shaft, the second ring gear is connected to the output shaft, the first sun gear is selectively connected to the second planetary carrier and / or the first ring gear is selectively connected to the second ring gear.

[0007] According to the continuously variable transmission power system of the embodiment of the present invention, a new ECVT architecture is formed by the connection between the engine, the first motor, the first planetary gear and the second planetary gear, and the ECVT forward gear mode can be achieved by controlling the selective connection between the first sun gear and the second planetary gear, or the ECVT reverse gear mode can be achieved by controlling the selective connection between the first ring gear and the second ring gear. The structure is simple and compact and easy to control.

[0008] According to some embodiments of the present invention, the continuously variable transmission power system also includes: a first clutch, one end of the first clutch is connected to the first ring gear and the other end is connected to the second ring gear; a second clutch, one end of the second clutch is connected to the first sun gear and the other end is connected to the second planetary carrier.

[0009] According to some embodiments of the present invention, the continuously variable transmission power system further includes: a third clutch, one end of the third clutch being connected to the engine input shaft and the other end being connected to the first sun gear.

[0010] According to some embodiments of the present invention, the first gear ring and the second gear ring are coaxially arranged and have the same outer diameter.

[0011] According to some embodiments of the present invention, the continuously variable transmission power system also includes: a second motor; a third planetary gear, including a third ring gear, a third sun gear and a third planetary carrier, the third sun gear is connected to the second motor input shaft, and the output shaft is selectively connected to the second motor input shaft or the third planetary carrier.

[0012] According to some embodiments of the present invention, the continuously variable transmission power system further includes: a fourth clutch, one end of the fourth clutch being connected to the output shaft and the other end being selectively connected to the second motor input shaft or the third planetary carrier.

[0013] According to some embodiments of the present invention, one end of the second ring gear is connected to the third sun gear and one end of the fourth clutch.

[0014] According to some embodiments of the present invention, the continuously variable transmission power system also includes: a fifth clutch, one end of which is fixed and the other end is connected to the third ring gear; and a sixth clutch, one end of which is connected to the second motor input shaft and the other end is connected to the third ring gear.

[0015] According to some embodiments of the present invention, the continuously variable transmission power system further includes: a seventh clutch, one end of which is fixed and the other end of which is connected to the first motor input shaft and the first planetary carrier.

[0016] According to the continuously variable transmission power system of the second aspect embodiment of the present invention, it includes: an engine; a first motor; a first planetary gear row, including a first ring gear, a first sun gear and a first planetary carrier; a second planetary gear row, including a second ring gear, a second sun gear and a second planetary carrier, the second sun gear is connected to the first planetary carrier, the first planetary carrier is connected to the first motor input shaft, the first sun gear is connected to the engine input shaft, the first sun gear is connected to the second planetary carrier, and the first ring gear or the second ring gear is selectively connected to the output shaft.

[0017] The vehicle according to the third embodiment of the present invention includes the continuously variable transmission power system.

[0018] Additional aspects and advantages of the present invention will be given in part in the following description and will become apparent from the following description or learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0020] Figure 1 It is a structural schematic diagram of a continuously variable transmission power system according to the first embodiment of the utility model;

[0021] Figure 2 1 is a schematic structural diagram of a continuously variable transmission power system according to a second embodiment of the present utility model;

[0022] Figure 3 It is a structural schematic diagram of a continuously variable speed power system according to the third embodiment of the present utility model.

[0023] Reference numerals:

[0024] 1. Engine; 11. Engine input shaft; 2. First motor; 21. First motor input shaft; 3. First planetary gear; 31. First ring gear; 32. First sun gear; 33. First planetary carrier; 4. Second planetary gear; 41. Second ring gear; 42. Second sun gear; 43. Second planetary carrier; 5. Output shaft; 6. First clutch; 7. Second clutch; 8. Third clutch; 9. Second motor; 91. Second motor input shaft; 10. Third planetary gear; 101. Third ring gear; 102. Third sun gear; 103. Third planetary carrier; 12. Fourth clutch; 13. Sixth clutch; 14. Seventh clutch; 15. First connecting shaft; 16. Second connecting shaft; 17. Eighth clutch; 18. Ninth clutch; 19. Fifth clutch. DETAILED DESCRIPTION

[0025] The embodiments of the present invention are described in detail below. The embodiments described with reference to the accompanying drawings are exemplary. The embodiments of the present invention are described in detail below.

[0026] Reference below Figure 1-Figure 3 A continuously variable transmission power system according to an embodiment of the present invention is described.

[0027] The ECVT (full name electronic continuously variable transmission) architecture of new energy hybrid products currently on the market can generally only achieve forward gears. The specific architecture is generally composed of two architectures: parallel gears plus differentials or planetary gears plus differentials. There is a lack of an architecture solution for ECVT that can achieve reverse gear functions.

[0028] Therefore, the present invention proposes a continuously variable speed power system to solve the above technical problems.

[0029] like Figure 1 As shown, the continuously variable transmission powertrain includes: an engine 1, a first electric motor 2, a first planetary gear set 3, and a second planetary gear set 4. The first planetary gear set 3 includes a first ring gear 31, a first sun gear 32, and a first planetary carrier 33. The second planetary gear set 4 includes a second ring gear 41, a second sun gear 42, and a second planetary carrier 43. The second sun gear 42 is connected to the first planetary carrier 33, which is connected to the first electric motor input shaft 21. The first sun gear 32 is connected to the engine input shaft 11, and the second ring gear 41 is connected to the output shaft 5. The first sun gear 32 is selectively connected to the second planetary carrier 43 and / or the first ring gear 31 is selectively connected to the second ring gear 41.

[0030] Specifically, when the engine 1 and first motor 2 are driven simultaneously, the first sun gear 32 and second planetary carrier 43 are selectively connected. At this point, the first sun gear 32 and second planetary carrier 43 are connected to the engine input shaft 11. In this way, the engine 1 transmits a portion of its power via the first sun gear 32 through the first planetary carrier 33 to the second sun gear 42, and a portion of its power directly to the second planetary carrier 43 via the first sun gear 32. Simultaneously, the first motor 2 regulates the speed of the first planetary carrier 33. As a result, both power streams are simultaneously transmitted to the output shaft 5 via the second ring gear 41, thereby implementing ECVT mode. The ECVT mode at this point is ECVT forward mode.

[0031] When the engine 1 and the first motor 2 are driven simultaneously, the first ring gear 31 and the second ring gear 41 are selectively connected. At this point, the first planetary gear set 3 and the second planetary gear set 4 share a ring gear. The power of the engine 1 is transmitted through the first sun gear 32 and the first planetary carrier 33, and the first ring gear 31 directly transmits the power to the output shaft 5. At this time, the first motor 2 can adjust the speed of the first planetary carrier 33. At this time, the engine 1 and the first motor 2 simultaneously transmit power to the output shaft 5, thereby realizing the ECVT mode. Among them, the ECVT mode at this time is the ECVT reverse mode.

[0032] Furthermore, the engine 1 or the first motor 2 can be driven independently. As an example, when the first motor 2 is operating, the first ring gear 31 and the second ring gear 41 are selectively connected, and the second planetary carrier 43 is connected to the first sun gear 32. In this case, the first planetary row 3 and the second planetary row 4 share a ring gear. At this time, when the power of the first motor 2 passes through the first planetary row 3, part of the power is transmitted to the second planetary carrier 43 through the first sun gear 32, and part of the power is transmitted to the second sun gear 42 through the first planetary carrier 33. At this time, both powers are simultaneously input into the second ring gear 41. At this time, part of the power of the first planetary row 3 is also input into the first ring gear 31. At this time, both powers are simultaneously input into the output shaft 5, forming a direct drive of the first motor 2.

[0033] For example, the first motor 2 may be a GM motor, which has the advantages of a wide speed adjustment range and good waiting performance.

[0034] According to the continuously variable transmission power system of the embodiment of the present invention, a new ECVT architecture is formed by the connection between the engine 1, the first motor 2, the first planetary gear 3 and the second planetary gear 4. The ECVT forward gear mode can be achieved by controlling the selective connection between the first sun gear 32 and the second planetary gear 43, and the ECVT reverse gear mode can be achieved by controlling the selective connection between the first ring gear 31 and the second ring gear 41. The structure is simple and compact and easy to control.

[0035] According to some embodiments of the present invention, the continuously variable transmission power system further includes: a first clutch 6 and a second clutch 7, wherein one end of the first clutch 6 is connected to the first ring gear 31 and the other end is connected to the second ring gear 41. One end of the second clutch 7 is connected to the first sun gear 32 and the other end is connected to the second planetary carrier 43.

[0036] In this way, the first ring gear 31 and the second ring gear 41 can be disconnected or engaged through the first clutch 6, thereby facilitating the realization of the ECVT reverse gear mode, and the first sun gear 32 and the second planetary carrier 43 can be disconnected or engaged through the second clutch 7, thereby facilitating the realization of the ECVT forward gear mode, which can be achieved simply by controlling the first clutch 6 and the second clutch 7.

[0037] According to some embodiments of the present invention, the continuously variable transmission power system further includes: a third clutch 8 , one end of the third clutch 8 is connected to the engine input shaft 11 , and the other end of the third clutch 8 is connected to the first sun gear 32 .

[0038] In this configuration, the third clutch 8 controls the connection and disconnection between the engine input shaft 11 and the first sun gear 32. When the ECVT mode is engaged, the third clutch 8 connects the engine input shaft 11 and the first sun gear 32. When only the first motor 2 is driven, the third clutch 8 disconnects the engine input shaft 11 and the first sun gear 32.

[0039] According to some embodiments of the present invention, the first gear ring 31 and the second gear ring 41 are coaxially arranged and have the same outer diameter.

[0040] Such a configuration facilitates the engagement of the first ring gear 31 and the second ring gear 41 , that is, the first ring gear 31 and the second ring gear 41 can be engaged through the first clutch 6 , so that the first planetary gear set 3 and the second planetary gear set 4 share one ring gear.

[0041] According to some embodiments of the present invention, the continuously variable transmission power system further includes: a second motor 9 and a third planetary gear set 10. The third planetary gear set 10 includes a third ring gear 101, a third sun gear 102, and a third planetary carrier 103. The third sun gear 102 is connected to the second motor input shaft 91. The output shaft 5 is selectively connected to the second motor input shaft 91 or the third planetary carrier 103.

[0042] Specifically, when only the second motor 9 is driven, the output shaft 5 can be connected to the third planetary carrier 103, and the power of the second motor 9 is input from the third planetary carrier 103 to the output shaft 5 through the third sun gear 102. Alternatively, when only the second motor 9 is driven, the output shaft 5 can be connected to the second motor input shaft 91, and the power of the second motor 9 is directly input to the output shaft 5. Among them, in the third planetary carrier 103, the third ring gear 101 is fixed, the third sun gear 102 is active, and the third planetary carrier 103 is passive, so that the power of the second motor 9 is reduced in speed when passing through the third planetary gear 10. That is, when the output shaft 5 is connected to the third planetary carrier 103, it is in low gear, and when the output shaft 5 is connected to the second motor input shaft 91, it is in high gear, realizing the two-gear switching of the second motor 9.

[0043] Thus, the output shaft 5 is selectively connected to the second motor input shaft 91 or the third planetary carrier 103, which can achieve multi-speed adjustment of the second motor 9. Furthermore, in ECVT mode, when the engine 1, the first motor 2, and the second motor 9 are driven simultaneously, two forward gears and two reverse gears can be achieved in ECVT mode.

[0044] For example, the second motor 9 may be a TM motor, which has the advantages of extremely high efficiency and extremely high power density.

[0045] According to some embodiments of the present invention, the continuously variable transmission power system further includes: a fourth clutch 12 , one end of the fourth clutch 12 is connected to the output shaft 5 , and the other end is selectively connected to the second motor input shaft 91 or the third planetary carrier 103 .

[0046] With this arrangement, the fourth clutch 12 allows the output shaft 5 to selectively connect to either the third planetary carrier 103 or the second motor input shaft 91, thereby achieving different gear adjustments. Furthermore, a first connecting shaft 15 is provided between the fourth clutch 12 and the output shaft 5, and a second connecting shaft 16 is provided between the fourth clutch 12 and the second motor input shaft 91.

[0047] According to some embodiments of the present invention, one end of the second ring gear 41 is connected to the third sun gear 102 and one end of the fourth clutch 12 .

[0048] like Figure 2 In the second embodiment shown, one end of the second ring gear 41 is connected to the third sun gear 102 and one end of the fourth clutch 12. In this way, the power carried by the first ring gear 31 and / or the second ring gear 41 can be transmitted to the output shaft 5 through the third sun gear 102, or directly transmitted to the output shaft 5 through the fourth clutch 12 without passing through the third planetary gear 10.

[0049] According to some embodiments of the present invention, the continuously variable transmission power system also includes: a fifth clutch 19 and a sixth clutch 13, one end of the fifth clutch 19 is fixed, and the other end is connected to the third ring gear 101, one end of the sixth clutch 13 is connected to the second motor input shaft 91, and the other end is connected to the third ring gear 101.

[0050] like Figure 3 In the third embodiment shown, the fifth clutch 19 and the sixth clutch 13 are used to control the third ring gear 101. Specifically, when the fifth clutch 19 is disengaged and the sixth clutch 13 is engaged, the power of the second motor 9 is transmitted via the third sun gear 102 and the third ring gear 101 to the third planetary carrier 103, and ultimately to the output shaft 5 via the third planetary carrier 103. When the fifth clutch 19 is engaged and the sixth clutch 13 is disengaged, the power of the second motor 9 is transmitted via the third sun gear 102 to the third planetary carrier 103 and output to the output shaft 5. In this way, multi-speed adjustment is achieved through different transmission methods.

[0051] According to some embodiments of the present invention, the continuously variable transmission power system further includes: a seventh clutch 14 , one end of which is fixed, and the other end of which is connected to the first motor input shaft 21 and the first planetary carrier 33 .

[0052] Specifically, when only the engine 1 is driven, the second clutch 7 is engaged to connect the first sun gear 32 and the second planetary carrier 43, and the seventh clutch 14 is engaged to fix the first planetary carrier 33 and the second sun gear 42. At this time, the second planetary carrier 43 and the first sun gear 32 are connected to the engine input shaft 11, and the fourth clutch 12 is in an intermediate state. At this time, the power of the engine 1 is input to the second planetary carrier 43, and then input to the second ring gear 41 through the second planetary carrier 43, and finally input to the output shaft 5.

[0053] Furthermore, on the basis of the power transmission of the above-mentioned engine 1, the second motor 9 can also be driven to enter a hybrid mode in which the engine 1 and the second motor 9 are driven simultaneously, thereby realizing multi-gear adjustment in the hybrid mode.

[0054] According to the continuously variable transmission power system of the second aspect embodiment of the present invention, it includes: an engine 1; a first motor 2; a first planetary row 3, including a first ring gear 31, a first sun gear 32 and a first planetary carrier 33; a second planetary row 4, including a second ring gear 41, a second sun gear 42 and a second planetary carrier 43, the second sun gear 42 is connected to the first planetary carrier 33, the first motor input shaft 21 is connected to the first planetary carrier 33, the engine input shaft 11 is connected to the first sun gear 32, the first sun gear 32 is connected to the second planetary carrier 43, and the first ring gear 31 or the second ring gear 41 is selectively connected to the output shaft 5.

[0055] like Figure 3 In the third embodiment shown, the first ring gear 31 and the second ring gear 41 are selectively connected to the output shaft 5. Furthermore, the continuously variable transmission power system also includes an eighth clutch 17 and a ninth clutch 18. One end of the eighth clutch 17 is connected to the first ring gear 31 and the other end is connected to the output shaft 5. One end of the ninth clutch 18 is connected to the second ring gear 41 and the other end is connected to the output shaft 5.

[0056] Specifically, when the engine 1 and first motor 2 are driven simultaneously, the second ring gear 41 is selectively connected to the output shaft 5. At this time, the engine 1 transmits part of its power through the first sun gear 32 and then the first planetary carrier 33 to the second sun gear 42, and transmits part of its power directly to the second planetary carrier 43 through the first sun gear 32. Simultaneously, the first motor 2 regulates the speed of the first planetary carrier 33. As a result, both powers are simultaneously transmitted to the output shaft 5 through the second ring gear 41, thereby implementing the ECVT mode. The ECVT mode at this time is the ECVT forward mode.

[0057] When the engine 1 and the first motor 2 are driven simultaneously, the first ring gear 31 and the output shaft 5 are selectively connected. The power of the engine 1 is then transmitted directly to the output shaft 5 by the first ring gear 31 through the first sun gear 32 and the first planetary carrier 33. At this time, the first motor 2 can adjust the speed of the first planetary carrier 33. At this time, the engine 1 and the first motor 2 simultaneously transmit power to the output shaft 5, thereby realizing the ECVT mode. Among them, the ECVT mode at this time is the ECVT reverse mode.

[0058] According to some embodiments of the present invention, the first ring gear 31 can be connected to the third sun gear 102 and / or the third ring gear 101 through the eighth clutch 17, and the second ring gear 41 can be connected to the third sun gear 102 and / or the third ring gear 101 through the ninth clutch 18.

[0059] The vehicle according to the third embodiment of the present invention includes a continuously variable transmission power system.

[0060] According to the continuously variable transmission power system of the present utility model, Figure 1 For example, the following power modes can be realized.

[0061] 1. Pure electric mode:

[0062] In pure electric mode, there are five gears, which can be driven directly by the first motor 2, directly by the second motor 9, or driven simultaneously by the first motor 2 and the second motor 9.

[0063] EV1 gear: At this time, only the second motor 9 is working, and the first clutch 6, the second clutch 7, the third clutch 8, and the seventh clutch 14 are all in the disconnected state. At this time, the fourth clutch 12 is combined with the third planetary carrier 103 to the left. At this time, the power is input from the third planetary carrier 103 to the output shaft 5 through the second motor 9 through the third planetary gear 10.

[0064] EV2 gear: At this time, only the second motor 9 is working, and the first clutch 6, the second clutch 7, the third clutch 8, and the seventh clutch 14 are all in the disconnected state. At this time, the fourth clutch 12 is combined with the second motor input shaft 91 to the right. At this time, the power is input to the output shaft 5 through the second motor 9 through the fourth clutch 12.

[0065] EV3 gear: At this time, only the first motor 2 is working, the third clutch 8 and the seventh clutch 14 are in the disconnected state, the first clutch 6 is engaged, and the first planetary row 3 and the second planetary row 4 share a ring gear. The fourth clutch 12 is in the intermediate state, and the second clutch 7 is engaged. At this time, the second planetary carrier 43 is connected to the first sun gear 32. At this time, when the power of the first motor 2 passes through the first planetary row 3, part of the power is transmitted to the second planetary carrier 43 through the first sun gear 32, and part of the power is transmitted to the second sun gear 42 through the first planetary carrier 33. At this time, the two powers are input into the second ring gear 41 at the same time. At this time, part of the power of the first planetary row 3 is input into the first ring gear 31. At this time, the two powers are input into the output shaft 5 at the same time to form a direct drive of the first motor 2.

[0066] EV4 gear: At this time, the first motor 2 and the second motor 9 are driven simultaneously, the third clutch 8 and the seventh clutch 14 are in the disconnected state, the first clutch 6 is engaged, and the first planetary row 3 and the second planetary row 4 share a ring gear, and the second clutch 7 is engaged. At this time, the second planetary carrier 43 is connected to the first sun gear 32. At this time, when the power of the first motor 2 passes through the first planetary row 3, part of the power is transmitted to the second planetary carrier 43 through the first sun gear 32, and part of it is transmitted to the second sun gear 42 through the first planetary carrier 33. At this time, the two powers are input into the second ring gear 41 at the same time. At this time, part of the power of the first planetary row 3 is also input into the first ring gear 31. At this time, the two powers are input into the output shaft 5 at the same time, and the fourth clutch 12 is engaged to the third planetary carrier 103 to the left. At this time, the power is input from the second motor 9 through the third planetary row 10 from the third planetary carrier 103 to the output shaft 5, and the dual-motor direct drive is completed.

[0067] EV5 gear: At this time, the first motor 2 and the second motor 9 are driven at the same time, the third clutch 8 and the seventh clutch 14 are in the disconnected state, the first clutch 6 is engaged, and the first planetary row 3 and the second planetary row 4 share a ring gear, and the second clutch 7 is engaged. At this time, the second planetary carrier 43 is connected to the first sun gear 32. At this time, when the power of the first motor 2 passes through the first planetary row 3, part of the power is transmitted to the second planetary carrier 43 through the first sun gear 32, and part of it is transmitted to the second sun gear 42 through the first planetary carrier 33. At this time, the two powers are input into the second ring gear 41 at the same time. At this time, part of the power of the first planetary row 3 is also input into the first ring gear 31. At this time, the two powers are input to the output shaft 5 at the same time, and the fourth clutch 12 is engaged to the second motor input shaft 91 to the right. At this time, the power is input to the output shaft 5 through the second motor 9 through the fourth clutch 12, and the dual-motor direct drive is completed.

[0068] 2. Engine 1 direct drive mode:

[0069] In this mode, only the engine 1 is working, the third clutch 8, the seventh clutch 14, and the second clutch 7 are engaged, and the first clutch 6 is disconnected. When the seventh clutch 14 is engaged, the first planetary carrier 33 and the second sun gear 42 are fixed. When the second clutch 7 is engaged, the second planetary carrier 43 and the first sun gear 32 are connected to the engine input shaft 11, and the fourth clutch 12 is in an intermediate state. At this time, the power of the engine 1 is input to the second ring gear 41 through the second planetary carrier 43, and then input to the output shaft 5.

[0070] 3. Hybrid mode:

[0071] Hybrid mode 1: In this mode, only the engine 1 and the second motor 9 are working, and the third clutch 8, the seventh clutch 14, and the second clutch 7 are engaged. When the seventh clutch 14 is engaged, the first planetary carrier 33 and the second sun gear 42 are fixed. When the second clutch 7 is engaged, the second planetary carrier 43 and the first sun gear 32 are connected to the engine input shaft 11. At this time, the power of the engine 1 is input to the second planetary carrier 43, and then input to the second ring gear 41 through the planetary carrier and then to the output shaft 5. At this time, the fourth clutch 12 is engaged to the left with the third planetary carrier 103. At this time, the power is input from the third planetary carrier 103 to the output shaft 5 through the second motor 9 through the third planetary row 10, realizing the hybrid mode.

[0072] Hybrid mode 2: In this mode, only the engine 1 and the second motor 9 are working, and the third clutch 8, the seventh clutch 14, and the second clutch 7 are engaged. When the seventh clutch 14 is engaged, the first planetary carrier 33 and the second sun gear 42 are fixed. When the second clutch 7 is engaged, the second planetary carrier 43 and the first sun gear 32 are connected to the engine input shaft 11. At this time, the power of the engine 1 is input to the second ring gear 41 through the second planetary carrier 43, and then input to the output shaft 5. At this time, the fourth clutch 12 is engaged to the right with the second motor input shaft 91. At this time, the power is input to the output shaft 5 through the second motor 9 through the fourth clutch 12, realizing the hybrid mode.

[0073] 4. ECVT mode:

[0074] ECVT advances to 1st gear; at this time, the engine 1, the first motor 2, and the second motor 9 are running at the same time, and the third clutch 8 is combined with the second clutch 7. When the second clutch 7 is combined, the second planetary carrier 43 and the first sun gear 32 are connected to the engine input shaft 11. At this time, part of the power of the engine 1 is transmitted to the second sun gear 42 through the first sun gear 32 via the first planetary carrier 33, and part of the power is directly transmitted to the second planetary carrier 43 through the second clutch 7. The first motor 2 regulates the speed of the first planetary carrier 33. At this time, the two powers are simultaneously transmitted to the output shaft 5 through the second ring gear 41. At this time, the fourth clutch 12 is combined with the third planetary carrier 103 to the left. At this time, the power is input from the third planetary carrier 103 to the output shaft 5 through the second motor 9 through the third planetary row 10 for ECVT speed regulation.

[0075] ECVT forward 2nd gear; at this time, the engine 1, the first motor 2, and the second motor 9 are running at the same time, and the third clutch 8 is combined with the second clutch 7. When the second clutch 7 is combined, the second planetary carrier 43 and the first sun gear 32 are connected to the engine input shaft 11. At this time, part of the power of the engine 1 is transmitted to the second sun gear 42 through the first sun gear 32 via the first planetary carrier 33, and part of the power is directly transmitted to the second planetary carrier 43 through the second clutch 7. The first motor 2 regulates the speed of the first planetary carrier 33. At this time, the two powers are simultaneously transmitted to the output shaft 5 through the second ring gear 41. At this time, the fourth clutch 12 is combined to the second motor input shaft 91 to the right. At this time, the power is input to the output shaft 5 through the second motor 9 via the fourth clutch 12 for ECVT speed regulation.

[0076] ECVT reverse gear 1: At this time, the engine 1, the first motor 2, and the second motor 9 are running at the same time, and the third clutch 8 is combined with the first clutch 6. When the first clutch 6 is combined, the first planetary row 3 and the second planetary row 4 share a ring gear. At this time, the power of the engine 1 is transmitted to the output shaft 5 through the first sun gear 32 and then through the first planetary carrier 33. At this time, the first motor 2 can adjust the speed of the first planetary carrier 33. The engine 1 and the first motor 2 transmit power to the output shaft 5 at the same time. At this time, the fourth clutch 12 is combined with the third planetary carrier 103 to the left. At this time, the power is input from the third planetary carrier 103 to the output shaft 5 through the second motor 9 through the third planetary row 10 for ECVT speed regulation.

[0077] ECVT reverse gear 2: At this time, the engine 1, the first motor 2, and the second motor 9 are running at the same time, and the third clutch 8 is combined with the first clutch 6. When the first clutch 6 is combined, the first planetary row 3 and the second planetary row 4 share a ring gear. At this time, the power of the engine 1 is transmitted to the output shaft 5 through the first sun gear 32 and the first planetary carrier 33. At this time, the first motor 2 can adjust the speed of the first planetary carrier 33. This is because the engine 1 and the first motor 2 transmit power to the output shaft 5 at the same time. At this time, the fourth clutch 12 is combined to the second motor input shaft 91 to the right. At this time, the power is input to the output shaft 5 through the second motor 9 through the fourth clutch 12 for ECVT speed regulation.

[0078] The continuously variable transmission powertrain of the present invention utilizes multiple clutches and selectively disconnects the engine 1, first motor 2, and second motor 9 to achieve pure electric mode, engine 1 direct drive mode, hybrid mode, and ECVT mode to meet driving requirements under different vehicle conditions. In ECVT mode, multiple gear positions can be adjusted for both forward and reverse gears. Furthermore, when the fourth clutch 12 switches gear positions, torque compensation by the first motor 2 allows for power-free shifting. Furthermore, the number of clutches can be further increased or decreased to achieve different functions. Furthermore, PTU high and low gears can be combined to better meet the power requirements of off-road vehicles.

[0079] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and 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, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation to the present invention.

[0080] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "illustrative embodiments," "example," "specific example," or "some examples" means that a specific feature, structure, material, or characteristic described in conjunction with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example.

[0081] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and purpose of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A continuously variable transmission power system, characterized in that: include: engine; First motor; A first planetary gear set, comprising a first ring gear, a first sun gear and a first planet carrier; The second planetary row includes a second ring gear, a second sun gear and a second planetary carrier, the second sun gear is connected to the first planetary carrier, the first planetary carrier is connected to the first motor input shaft, the first sun gear is connected to the engine input shaft, the second ring gear is connected to the output shaft, the first sun gear is selectively connected to the second planetary carrier or the first ring gear and / or the second ring gear are selectively connected.

2. The continuously variable transmission power system according to claim 1, characterized in that: Also includes: a first clutch, one end of the first clutch being connected to the first ring gear and the other end of the first clutch being connected to the second ring gear; A second clutch has one end connected to the first sun gear and the other end connected to the second planet carrier.

3. The continuously variable transmission power system according to claim 1, characterized in that: Also includes: A third clutch has one end connected to the engine input shaft and the other end connected to the first sun gear.

4. The continuously variable transmission power system according to claim 1, characterized in that: The first gear ring and the second gear ring are coaxially arranged and have the same outer diameter.

5. The continuously variable transmission power system according to claim 1, characterized in that: Also includes: Second motor; The third planetary gear row includes a third ring gear, a third sun gear and a third planetary carrier. The third ring gear is fixed, the third sun gear is connected to the second motor input shaft, and the output shaft is selectively connected to the second motor input shaft or the third planetary carrier.

6. The continuously variable transmission power system according to claim 5, characterized in that: Also includes: A fourth clutch, one end of which is connected to the output shaft and the other end of which is selectively connected to the second motor input shaft or the third planetary carrier.

7. The continuously variable transmission power system according to claim 6, characterized in that: One end of the second ring gear is connected to the third sun gear and one end of the fourth clutch.

8. The continuously variable transmission power system according to claim 5, characterized in that: Also includes: a fifth clutch, one end of which is fixed and the other end of which is connected to the third ring gear; A sixth clutch, one end of the sixth clutch is connected to the second motor input shaft and the other end is connected to the third ring gear.

9. The continuously variable transmission power system according to claim 1, characterized in that: Also includes: A seventh clutch, one end of which is fixed and the other end of which is connected to the first motor input shaft and the first planetary carrier.

10. A continuously variable transmission power system, characterized in that: include: engine; First motor; A first planetary gear set, comprising a first ring gear, a first sun gear and a first planet carrier; The second planetary gear row includes a second ring gear, a second sun gear and a second planetary carrier. The second sun gear is connected to the first planetary carrier, the first planetary carrier is connected to the first motor input shaft, the first sun gear is connected to the engine input shaft, the first sun gear is connected to the second planetary carrier, and the first ring gear or the second ring gear is selectively connected to the output shaft.

11. A vehicle, characterized in that: The invention comprises a continuously variable transmission power system as described in any one of claims 1 to 10.

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